/* ============================================================
   Material Design 3 — Complete Design Token System
   Strictly based on M3 spec: m3.material.io
   Seed color: #6750A4 (Primary 40)
   ============================================================ */

/* ============================================================
   1. REFERENCE PALETTES (Tonal Stops 0–100)
   ============================================================ */
:root {
  /* ---- Primary (seed #6750A4 → tone 40) ---- */
  --md-ref-palette-primary0:    #000000;
  --md-ref-palette-primary10:   #21005D;
  --md-ref-palette-primary20:   #381E72;
  --md-ref-palette-primary30:   #4F378B;
  --md-ref-palette-primary40:   #6750A4;
  --md-ref-palette-primary50:   #7F68B8;
  --md-ref-palette-primary60:   #9A82CC;
  --md-ref-palette-primary70:   #B69DE0;
  --md-ref-palette-primary80:   #D0BCFF;
  --md-ref-palette-primary90:   #EADDFF;
  --md-ref-palette-primary95:   #F6EDFF;
  --md-ref-palette-primary99:   #FFFBFE;
  --md-ref-palette-primary100:  #FFFFFF;

  /* ---- Secondary ---- */
  --md-ref-palette-secondary0:    #000000;
  --md-ref-palette-secondary10:   #1D192B;
  --md-ref-palette-secondary20:   #332D41;
  --md-ref-palette-secondary30:   #4A4458;
  --md-ref-palette-secondary40:   #625B71;
  --md-ref-palette-secondary50:   #7A7389;
  --md-ref-palette-secondary60:   #958DA4;
  --md-ref-palette-secondary70:   #B0A7BF;
  --md-ref-palette-secondary80:   #CCC2DC;
  --md-ref-palette-secondary90:   #E8DEF8;
  --md-ref-palette-secondary95:   #F6EDFF;
  --md-ref-palette-secondary99:   #FFFBFE;
  --md-ref-palette-secondary100:  #FFFFFF;

  /* ---- Tertiary ---- */
  --md-ref-palette-tertiary0:    #000000;
  --md-ref-palette-tertiary10:   #31111D;
  --md-ref-palette-tertiary20:   #492532;
  --md-ref-palette-tertiary30:   #633B48;
  --md-ref-palette-tertiary40:   #7D5260;
  --md-ref-palette-tertiary50:   #986A78;
  --md-ref-palette-tertiary60:   #B58391;
  --md-ref-palette-tertiary70:   #D29DAB;
  --md-ref-palette-tertiary80:   #EFB8C8;
  --md-ref-palette-tertiary90:   #FFD8E4;
  --md-ref-palette-tertiary95:   #FFECF0;
  --md-ref-palette-tertiary99:   #FFFBFE;
  --md-ref-palette-tertiary100:  #FFFFFF;

  /* ---- Error ---- */
  --md-ref-palette-error0:    #000000;
  --md-ref-palette-error10:   #410E0B;
  --md-ref-palette-error20:   #601410;
  --md-ref-palette-error30:   #8C1D18;
  --md-ref-palette-error40:   #B3261E;
  --md-ref-palette-error50:   #DC362E;
  --md-ref-palette-error60:   #E46962;
  --md-ref-palette-error70:   #EC928E;
  --md-ref-palette-error80:   #F2B8B5;
  --md-ref-palette-error90:   #F9DEDC;
  --md-ref-palette-error95:   #FCEEEE;
  --md-ref-palette-error99:   #FFFBFE;
  --md-ref-palette-error100:  #FFFFFF;

  /* ---- Neutral ---- */
  --md-ref-palette-neutral0:    #000000;
  --md-ref-palette-neutral4:    #0F0D13;
  --md-ref-palette-neutral6:    #141218;
  --md-ref-palette-neutral10:   #1D1B20;
  --md-ref-palette-neutral12:   #211F26;
  --md-ref-palette-neutral17:   #2B2930;
  --md-ref-palette-neutral20:   #322F35;
  --md-ref-palette-neutral22:   #36343B;
  --md-ref-palette-neutral30:   #48464C;
  --md-ref-palette-neutral40:   #605D64;
  --md-ref-palette-neutral50:   #79767D;
  --md-ref-palette-neutral60:   #938F96;
  --md-ref-palette-neutral70:   #AEA9B1;
  --md-ref-palette-neutral80:   #CAC4CD;
  --md-ref-palette-neutral90:   #E6E0E9;
  --md-ref-palette-neutral92:   #ECE6F0;
  --md-ref-palette-neutral94:   #F3EDF7;
  --md-ref-palette-neutral96:   #F7F2FA;
  --md-ref-palette-neutral98:   #FEF7FF;
  --md-ref-palette-neutral99:   #FFFBFF;
  --md-ref-palette-neutral100:  #FFFFFF;

  /* ---- Neutral Variant ---- */
  --md-ref-palette-neutral-variant0:    #000000;
  --md-ref-palette-neutral-variant10:   #1D1A22;
  --md-ref-palette-neutral-variant20:   #322F37;
  --md-ref-palette-neutral-variant30:   #49454F;
  --md-ref-palette-neutral-variant40:   #605D66;
  --md-ref-palette-neutral-variant50:   #79747E;
  --md-ref-palette-neutral-variant60:   #938F99;
  --md-ref-palette-neutral-variant70:   #AEA9B4;
  --md-ref-palette-neutral-variant80:   #CAC4D0;
  --md-ref-palette-neutral-variant90:   #E7E0EC;
  --md-ref-palette-neutral-variant95:   #F5EEFA;
  --md-ref-palette-neutral-variant99:   #FFFBFE;
  --md-ref-palette-neutral-variant100:  #FFFFFF;
}

/* ============================================================
   2. LIGHT THEME — MD3 Baseline Color Scheme
   https://m3.material.io/styles/color/roles
   ============================================================ */
:root,
:root[data-theme="light"] {
  /* Accent */
  --md-sys-color-primary:              var(--md-ref-palette-primary40);
  --md-sys-color-on-primary:           var(--md-ref-palette-primary100);
  --md-sys-color-primary-container:    var(--md-ref-palette-primary90);
  --md-sys-color-on-primary-container: var(--md-ref-palette-primary10);

  --md-sys-color-secondary:              var(--md-ref-palette-secondary40);
  --md-sys-color-on-secondary:           var(--md-ref-palette-secondary100);
  --md-sys-color-secondary-container:    var(--md-ref-palette-secondary90);
  --md-sys-color-on-secondary-container: var(--md-ref-palette-secondary10);

  --md-sys-color-tertiary:              var(--md-ref-palette-tertiary40);
  --md-sys-color-on-tertiary:           var(--md-ref-palette-tertiary100);
  --md-sys-color-tertiary-container:    var(--md-ref-palette-tertiary90);
  --md-sys-color-on-tertiary-container: var(--md-ref-palette-tertiary10);

  /* Error */
  --md-sys-color-error:              var(--md-ref-palette-error40);
  --md-sys-color-on-error:           var(--md-ref-palette-error100);
  --md-sys-color-error-container:    var(--md-ref-palette-error90);
  --md-sys-color-on-error-container: var(--md-ref-palette-error10);

  /* Surface */
  --md-sys-color-surface:                     var(--md-ref-palette-neutral98);
  --md-sys-color-on-surface:                  var(--md-ref-palette-neutral10);
  --md-sys-color-on-surface-variant:          var(--md-ref-palette-neutral-variant30);
  --md-sys-color-surface-container-lowest:    var(--md-ref-palette-neutral100);
  --md-sys-color-surface-container-low:       var(--md-ref-palette-neutral96);
  --md-sys-color-surface-container:           var(--md-ref-palette-neutral94);
  --md-sys-color-surface-container-high:      var(--md-ref-palette-neutral92);
  --md-sys-color-surface-container-highest:   var(--md-ref-palette-neutral90);
  --md-sys-color-surface-dim:                 var(--md-ref-palette-neutral80);
  --md-sys-color-surface-bright:              var(--md-ref-palette-neutral98);

  /* Inverse */
  --md-sys-color-inverse-surface:     var(--md-ref-palette-neutral20);
  --md-sys-color-inverse-on-surface:  var(--md-ref-palette-neutral95);
  --md-sys-color-inverse-primary:     var(--md-ref-palette-primary80);

  /* Outline */
  --md-sys-color-outline:         var(--md-ref-palette-neutral-variant50);
  --md-sys-color-outline-variant: var(--md-ref-palette-neutral-variant80);

  /* Shadow / Scrim */
  --md-sys-color-shadow: rgba(0, 0, 0, 0.18);
  --md-sys-color-scrim:   rgba(0, 0, 0, 0.32);
}

/* ============================================================
   3. DARK THEME — MD3 Baseline Color Scheme
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --md-sys-color-primary:              var(--md-ref-palette-primary80);
    --md-sys-color-on-primary:           var(--md-ref-palette-primary20);
    --md-sys-color-primary-container:    var(--md-ref-palette-primary30);
    --md-sys-color-on-primary-container: var(--md-ref-palette-primary90);

    --md-sys-color-secondary:              var(--md-ref-palette-secondary80);
    --md-sys-color-on-secondary:           var(--md-ref-palette-secondary20);
    --md-sys-color-secondary-container:    var(--md-ref-palette-secondary30);
    --md-sys-color-on-secondary-container: var(--md-ref-palette-secondary90);

    --md-sys-color-tertiary:              var(--md-ref-palette-tertiary80);
    --md-sys-color-on-tertiary:           var(--md-ref-palette-tertiary20);
    --md-sys-color-tertiary-container:    var(--md-ref-palette-tertiary30);
    --md-sys-color-on-tertiary-container: var(--md-ref-palette-tertiary90);

    --md-sys-color-error:              var(--md-ref-palette-error80);
    --md-sys-color-on-error:           var(--md-ref-palette-error20);
    --md-sys-color-error-container:    var(--md-ref-palette-error30);
    --md-sys-color-on-error-container: var(--md-ref-palette-error90);

    --md-sys-color-surface:                     var(--md-ref-palette-neutral6);
    --md-sys-color-on-surface:                  var(--md-ref-palette-neutral90);
    --md-sys-color-on-surface-variant:          var(--md-ref-palette-neutral-variant80);
    --md-sys-color-surface-container-lowest:    var(--md-ref-palette-neutral4);
    --md-sys-color-surface-container-low:       var(--md-ref-palette-neutral10);
    --md-sys-color-surface-container:           var(--md-ref-palette-neutral12);
    --md-sys-color-surface-container-high:      var(--md-ref-palette-neutral17);
    --md-sys-color-surface-container-highest:   var(--md-ref-palette-neutral22);
    --md-sys-color-surface-dim:                 var(--md-ref-palette-neutral6);
    --md-sys-color-surface-bright:              var(--md-ref-palette-neutral30);

    --md-sys-color-inverse-surface:     var(--md-ref-palette-neutral90);
    --md-sys-color-inverse-on-surface:  var(--md-ref-palette-neutral20);
    --md-sys-color-inverse-primary:     var(--md-ref-palette-primary40);

    --md-sys-color-outline:         var(--md-ref-palette-neutral-variant60);
    --md-sys-color-outline-variant: var(--md-ref-palette-neutral-variant30);

    --md-sys-color-shadow: rgba(0, 0, 0, 0.35);
    --md-sys-color-scrim:   rgba(0, 0, 0, 0.42);
  }
}

:root[data-theme="dark"] {
  --md-sys-color-primary:              var(--md-ref-palette-primary80);
  --md-sys-color-on-primary:           var(--md-ref-palette-primary20);
  --md-sys-color-primary-container:    var(--md-ref-palette-primary30);
  --md-sys-color-on-primary-container: var(--md-ref-palette-primary90);

  --md-sys-color-secondary:              var(--md-ref-palette-secondary80);
  --md-sys-color-on-secondary:           var(--md-ref-palette-secondary20);
  --md-sys-color-secondary-container:    var(--md-ref-palette-secondary30);
  --md-sys-color-on-secondary-container: var(--md-ref-palette-secondary90);

  --md-sys-color-tertiary:              var(--md-ref-palette-tertiary80);
  --md-sys-color-on-tertiary:           var(--md-ref-palette-tertiary20);
  --md-sys-color-tertiary-container:    var(--md-ref-palette-tertiary30);
  --md-sys-color-on-tertiary-container: var(--md-ref-palette-tertiary90);

  --md-sys-color-error:              var(--md-ref-palette-error80);
  --md-sys-color-on-error:           var(--md-ref-palette-error20);
  --md-sys-color-error-container:    var(--md-ref-palette-error30);
  --md-sys-color-on-error-container: var(--md-ref-palette-error90);

  --md-sys-color-surface:                     var(--md-ref-palette-neutral6);
  --md-sys-color-on-surface:                  var(--md-ref-palette-neutral90);
  --md-sys-color-on-surface-variant:          var(--md-ref-palette-neutral-variant80);
  --md-sys-color-surface-container-lowest:    var(--md-ref-palette-neutral4);
  --md-sys-color-surface-container-low:       var(--md-ref-palette-neutral10);
  --md-sys-color-surface-container:           var(--md-ref-palette-neutral12);
  --md-sys-color-surface-container-high:      var(--md-ref-palette-neutral17);
  --md-sys-color-surface-container-highest:   var(--md-ref-palette-neutral22);
  --md-sys-color-surface-dim:                 var(--md-ref-palette-neutral6);
  --md-sys-color-surface-bright:              var(--md-ref-palette-neutral30);

  --md-sys-color-inverse-surface:     var(--md-ref-palette-neutral90);
  --md-sys-color-inverse-on-surface:  var(--md-ref-palette-neutral20);
  --md-sys-color-inverse-primary:     var(--md-ref-palette-primary40);

  --md-sys-color-outline:         var(--md-ref-palette-neutral-variant60);
  --md-sys-color-outline-variant: var(--md-ref-palette-neutral-variant30);

  --md-sys-color-shadow: rgba(0, 0, 0, 0.35);
  --md-sys-color-scrim:   rgba(0, 0, 0, 0.42);
}

/* ============================================================
   4. TYPOGRAPHY TOKENS — MD3 Type Scale
   Roboto Flex (brand & plain) with CJK system fallback
   ============================================================ */
:root {
  --md-ref-typeface-brand: 'Roboto Flex', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --md-ref-typeface-plain:  'Roboto Flex', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* Display Large */
  --md-sys-typescale-display-large-font:         var(--md-ref-typeface-brand);
  --md-sys-typescale-display-large-weight:       400;
  --md-sys-typescale-display-large-size:         3.5625rem;
  --md-sys-typescale-display-large-line-height:  4rem;
  --md-sys-typescale-display-large-tracking:     -0.015625rem;

  /* Display Medium */
  --md-sys-typescale-display-medium-font:         var(--md-ref-typeface-brand);
  --md-sys-typescale-display-medium-weight:       400;
  --md-sys-typescale-display-medium-size:         2.8125rem;
  --md-sys-typescale-display-medium-line-height:  3.25rem;
  --md-sys-typescale-display-medium-tracking:     0;

  /* Display Small */
  --md-sys-typescale-display-small-font:         var(--md-ref-typeface-brand);
  --md-sys-typescale-display-small-weight:       400;
  --md-sys-typescale-display-small-size:         2.25rem;
  --md-sys-typescale-display-small-line-height:  2.75rem;
  --md-sys-typescale-display-small-tracking:     0;

  /* Headline Large */
  --md-sys-typescale-headline-large-font:         var(--md-ref-typeface-brand);
  --md-sys-typescale-headline-large-weight:       400;
  --md-sys-typescale-headline-large-size:         2rem;
  --md-sys-typescale-headline-large-line-height:  2.5rem;
  --md-sys-typescale-headline-large-tracking:     0;

  /* Headline Medium */
  --md-sys-typescale-headline-medium-font:         var(--md-ref-typeface-brand);
  --md-sys-typescale-headline-medium-weight:       400;
  --md-sys-typescale-headline-medium-size:         1.75rem;
  --md-sys-typescale-headline-medium-line-height:  2.25rem;
  --md-sys-typescale-headline-medium-tracking:     0;

  /* Headline Small */
  --md-sys-typescale-headline-small-font:         var(--md-ref-typeface-brand);
  --md-sys-typescale-headline-small-weight:       400;
  --md-sys-typescale-headline-small-size:         1.5rem;
  --md-sys-typescale-headline-small-line-height:  2rem;
  --md-sys-typescale-headline-small-tracking:     0;

  /* Title Large */
  --md-sys-typescale-title-large-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-title-large-weight:       400;
  --md-sys-typescale-title-large-size:         1.375rem;
  --md-sys-typescale-title-large-line-height:  1.75rem;
  --md-sys-typescale-title-large-tracking:     0;

  /* Title Medium */
  --md-sys-typescale-title-medium-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-title-medium-weight:       500;
  --md-sys-typescale-title-medium-size:         1rem;
  --md-sys-typescale-title-medium-line-height:  1.5rem;
  --md-sys-typescale-title-medium-tracking:     0.009375rem;

  /* Title Small */
  --md-sys-typescale-title-small-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-title-small-weight:       500;
  --md-sys-typescale-title-small-size:         0.875rem;
  --md-sys-typescale-title-small-line-height:  1.25rem;
  --md-sys-typescale-title-small-tracking:     0.00625rem;

  /* Body Large */
  --md-sys-typescale-body-large-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-body-large-weight:       400;
  --md-sys-typescale-body-large-size:         1rem;
  --md-sys-typescale-body-large-line-height:  1.5rem;
  --md-sys-typescale-body-large-tracking:     0.03125rem;

  /* Body Medium */
  --md-sys-typescale-body-medium-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-body-medium-weight:       400;
  --md-sys-typescale-body-medium-size:         0.875rem;
  --md-sys-typescale-body-medium-line-height:  1.25rem;
  --md-sys-typescale-body-medium-tracking:     0.015625rem;

  /* Body Small */
  --md-sys-typescale-body-small-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-body-small-weight:       400;
  --md-sys-typescale-body-small-size:         0.75rem;
  --md-sys-typescale-body-small-line-height:  1rem;
  --md-sys-typescale-body-small-tracking:     0.025rem;

  /* Label Large */
  --md-sys-typescale-label-large-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-label-large-weight:       500;
  --md-sys-typescale-label-large-size:         0.875rem;
  --md-sys-typescale-label-large-line-height:  1.25rem;
  --md-sys-typescale-label-large-tracking:     0.00625rem;

  /* Label Medium */
  --md-sys-typescale-label-medium-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-label-medium-weight:       500;
  --md-sys-typescale-label-medium-size:         0.75rem;
  --md-sys-typescale-label-medium-line-height:  1rem;
  --md-sys-typescale-label-medium-tracking:     0.03125rem;

  /* Label Small */
  --md-sys-typescale-label-small-font:         var(--md-ref-typeface-plain);
  --md-sys-typescale-label-small-weight:       500;
  --md-sys-typescale-label-small-size:         0.6875rem;
  --md-sys-typescale-label-small-line-height:  1rem;
  --md-sys-typescale-label-small-tracking:     0.03125rem;
}

/* ============================================================
   5. SHAPE TOKENS — M3 Corner Radius Scale
   ============================================================ */
:root {
  --md-sys-shape-corner-none:                  0px;
  --md-sys-shape-corner-extra-small:           4px;
  --md-sys-shape-corner-small:                 8px;
  --md-sys-shape-corner-medium:                12px;
  --md-sys-shape-corner-large:                 16px;
  --md-sys-shape-corner-large-increased:       20px;
  --md-sys-shape-corner-extra-large:           28px;
  --md-sys-shape-corner-extra-large-increased: 32px;
  --md-sys-shape-corner-extra-extra-large:     48px;
  --md-sys-shape-corner-full:                  9999px;
}

/* ============================================================
   6. MOTION TOKENS — Easing & Duration
   ============================================================ */
:root {
  /* === Easing === */
  --md-sys-motion-easing-emphasized:            cubic-bezier(0.2, 0, 0, 1);
  --md-sys-motion-easing-emphasized-decelerate: cubic-bezier(0.05, 0.7, 0.1, 1);
  --md-sys-motion-easing-emphasized-accelerate: cubic-bezier(0.3, 0, 0.8, 0.15);
  --md-sys-motion-easing-standard:              cubic-bezier(0.2, 0, 0, 1);
  --md-sys-motion-easing-standard-decelerate:   cubic-bezier(0, 0, 0, 1);
  --md-sys-motion-easing-standard-accelerate:   cubic-bezier(0.3, 0, 1, 1);

  /* === Duration === */
  --md-sys-motion-duration-short1:       50ms;
  --md-sys-motion-duration-short2:      100ms;
  --md-sys-motion-duration-short3:      150ms;
  --md-sys-motion-duration-short4:      200ms;
  --md-sys-motion-duration-medium1:     250ms;
  --md-sys-motion-duration-medium2:     300ms;
  --md-sys-motion-duration-medium3:     350ms;
  --md-sys-motion-duration-medium4:     400ms;
  --md-sys-motion-duration-long1:       450ms;
  --md-sys-motion-duration-long2:       500ms;
  --md-sys-motion-duration-long3:       550ms;
  --md-sys-motion-duration-long4:       600ms;
  --md-sys-motion-duration-extra-long1: 700ms;
  --md-sys-motion-duration-extra-long2: 800ms;
  --md-sys-motion-duration-extra-long3: 900ms;
  --md-sys-motion-duration-extra-long4: 1000ms;

  /* === Spacing (8dp grid) === */
  --md-sys-spacing-0:  0px;
  --md-sys-spacing-1:  4px;
  --md-sys-spacing-2:  8px;
  --md-sys-spacing-3:  12px;
  --md-sys-spacing-4:  16px;
  --md-sys-spacing-5:  20px;
  --md-sys-spacing-6:  24px;
  --md-sys-spacing-8:  32px;
  --md-sys-spacing-10: 40px;
  --md-sys-spacing-12: 48px;
  --md-sys-spacing-16: 64px;
  --md-sys-spacing-20: 80px;
}

/* ============================================================
   7. RESET & BASE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--md-ref-typeface-plain);
  font-weight: 400;
  font-size: 0.875rem;
  line-height: 1.25rem;
  letter-spacing: 0.015625rem;
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition:
    background-color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard),
    color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  border: none;
  cursor: pointer;
  background: none;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

/* Selection — uses primary container + on-primary-container */
::selection {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

/* Focus visible — MD3 focus ring (3px, offset 2px) */
:focus-visible {
  outline: 3px solid var(--md-sys-color-primary);
  outline-offset: 2px;
  border-radius: var(--md-sys-shape-corner-extra-small);
}

/* ============================================================
   8. TYPESCALE UTILITY CLASSES
   ============================================================ */
.typescale-display-large {
  font-family:    var(--md-sys-typescale-display-large-font);
  font-weight:    var(--md-sys-typescale-display-large-weight);
  font-size:      var(--md-sys-typescale-display-large-size);
  line-height:    var(--md-sys-typescale-display-large-line-height);
  letter-spacing: var(--md-sys-typescale-display-large-tracking);
}

.typescale-display-medium {
  font-family:    var(--md-sys-typescale-display-medium-font);
  font-weight:    var(--md-sys-typescale-display-medium-weight);
  font-size:      var(--md-sys-typescale-display-medium-size);
  line-height:    var(--md-sys-typescale-display-medium-line-height);
  letter-spacing: var(--md-sys-typescale-display-medium-tracking);
}

.typescale-display-small {
  font-family:    var(--md-sys-typescale-display-small-font);
  font-weight:    var(--md-sys-typescale-display-small-weight);
  font-size:      var(--md-sys-typescale-display-small-size);
  line-height:    var(--md-sys-typescale-display-small-line-height);
  letter-spacing: var(--md-sys-typescale-display-small-tracking);
}

.typescale-headline-large {
  font-family:    var(--md-sys-typescale-headline-large-font);
  font-weight:    var(--md-sys-typescale-headline-large-weight);
  font-size:      var(--md-sys-typescale-headline-large-size);
  line-height:    var(--md-sys-typescale-headline-large-line-height);
  letter-spacing: var(--md-sys-typescale-headline-large-tracking);
}

.typescale-headline-medium {
  font-family:    var(--md-sys-typescale-headline-medium-font);
  font-weight:    var(--md-sys-typescale-headline-medium-weight);
  font-size:      var(--md-sys-typescale-headline-medium-size);
  line-height:    var(--md-sys-typescale-headline-medium-line-height);
  letter-spacing: var(--md-sys-typescale-headline-medium-tracking);
}

.typescale-headline-small {
  font-family:    var(--md-sys-typescale-headline-small-font);
  font-weight:    var(--md-sys-typescale-headline-small-weight);
  font-size:      var(--md-sys-typescale-headline-small-size);
  line-height:    var(--md-sys-typescale-headline-small-line-height);
  letter-spacing: var(--md-sys-typescale-headline-small-tracking);
}

.typescale-title-large {
  font-family:    var(--md-sys-typescale-title-large-font);
  font-weight:    var(--md-sys-typescale-title-large-weight);
  font-size:      var(--md-sys-typescale-title-large-size);
  line-height:    var(--md-sys-typescale-title-large-line-height);
  letter-spacing: var(--md-sys-typescale-title-large-tracking);
}

.typescale-title-medium {
  font-family:    var(--md-sys-typescale-title-medium-font);
  font-weight:    var(--md-sys-typescale-title-medium-weight);
  font-size:      var(--md-sys-typescale-title-medium-size);
  line-height:    var(--md-sys-typescale-title-medium-line-height);
  letter-spacing: var(--md-sys-typescale-title-medium-tracking);
}

.typescale-title-small {
  font-family:    var(--md-sys-typescale-title-small-font);
  font-weight:    var(--md-sys-typescale-title-small-weight);
  font-size:      var(--md-sys-typescale-title-small-size);
  line-height:    var(--md-sys-typescale-title-small-line-height);
  letter-spacing: var(--md-sys-typescale-title-small-tracking);
}

.typescale-body-large {
  font-family:    var(--md-sys-typescale-body-large-font);
  font-weight:    var(--md-sys-typescale-body-large-weight);
  font-size:      var(--md-sys-typescale-body-large-size);
  line-height:    var(--md-sys-typescale-body-large-line-height);
  letter-spacing: var(--md-sys-typescale-body-large-tracking);
}

.typescale-body-medium {
  font-family:    var(--md-sys-typescale-body-medium-font);
  font-weight:    var(--md-sys-typescale-body-medium-weight);
  font-size:      var(--md-sys-typescale-body-medium-size);
  line-height:    var(--md-sys-typescale-body-medium-line-height);
  letter-spacing: var(--md-sys-typescale-body-medium-tracking);
}

.typescale-body-small {
  font-family:    var(--md-sys-typescale-body-small-font);
  font-weight:    var(--md-sys-typescale-body-small-weight);
  font-size:      var(--md-sys-typescale-body-small-size);
  line-height:    var(--md-sys-typescale-body-small-line-height);
  letter-spacing: var(--md-sys-typescale-body-small-tracking);
}

.typescale-label-large {
  font-family:    var(--md-sys-typescale-label-large-font);
  font-weight:    var(--md-sys-typescale-label-large-weight);
  font-size:      var(--md-sys-typescale-label-large-size);
  line-height:    var(--md-sys-typescale-label-large-line-height);
  letter-spacing: var(--md-sys-typescale-label-large-tracking);
}

.typescale-label-medium {
  font-family:    var(--md-sys-typescale-label-medium-font);
  font-weight:    var(--md-sys-typescale-label-medium-weight);
  font-size:      var(--md-sys-typescale-label-medium-size);
  line-height:    var(--md-sys-typescale-label-medium-line-height);
  letter-spacing: var(--md-sys-typescale-label-medium-tracking);
}

.typescale-label-small {
  font-family:    var(--md-sys-typescale-label-small-font);
  font-weight:    var(--md-sys-typescale-label-small-weight);
  font-size:      var(--md-sys-typescale-label-small-size);
  line-height:    var(--md-sys-typescale-label-small-line-height);
  letter-spacing: var(--md-sys-typescale-label-small-tracking);
}

/* ============================================================
   9. MD3 STATE LAYER
   Universal state layer for all interactive components
   ============================================================ */
.md3-state-layer {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background-color: currentColor;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard);
}

:hover > .md3-state-layer  { opacity: 0.08; }
:active > .md3-state-layer { opacity: 0.12; }

/* ============================================================
   10. TOP APP BAR (Small, Center-aligned)
   Level 0 at rest → Level 2 on scroll (tonal)
   ============================================================ */
.md3-top-app-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 64px;
  background-color: var(--md-sys-color-surface);
  transition:
    background-color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard),
    box-shadow var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
}

/* Scrolled → elevation level 2 = surface-container */
.md3-top-app-bar--scrolled {
  background-color: var(--md-sys-color-surface-container);
}

.md3-top-app-bar__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--md-sys-spacing-4);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-1);
}

.md3-top-app-bar__headline {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex-shrink: 0;
}

.md3-top-app-bar__avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--md-sys-shape-corner-full);
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15); /* level 1 */
}

.md3-top-app-bar__avatar-img {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
}

.md3-top-app-bar__nav {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-1);
  margin-left: auto;
}

/* ============================================================
   11. NAVIGATION ITEM (Pill-shaped, w/ state layer)
   ============================================================ */
.md3-nav-item {
  position: relative;
  height: 40px;
  padding: 0 var(--md-sys-spacing-3);
  display: inline-flex;
  align-items: center;
  gap: var(--md-sys-spacing-1);
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface-variant);
  overflow: hidden;
  transition: color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-nav-item:hover  { color: var(--md-sys-color-on-surface); }
.md3-nav-item:active { color: var(--md-sys-color-on-surface); }

.md3-nav-item__icon {
  font-size: 20px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

.md3-nav-item__label {
  white-space: nowrap;
  color: inherit;
}

/* ============================================================
   12. ICON BUTTON (Standard)
   ============================================================ */
.md3-icon-button {
  position: relative;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--md-sys-shape-corner-full);
  overflow: hidden;
  flex-shrink: 0;
  color: var(--md-sys-color-on-surface-variant);
  transition: color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-icon-button:hover  { color: var(--md-sys-color-on-surface); }
.md3-icon-button:active { color: var(--md-sys-color-on-surface); }

.md3-icon-button .material-symbols-rounded {
  font-size: 24px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* ============================================================
   13. BUTTONS — MD3 Spec
   ============================================================ */

/* ---- Filled Button (highest emphasis) ---- */
.md3-filled-button {
  --_btn-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: var(--md-sys-spacing-2);
  height: var(--_btn-height);
  padding: 0 var(--md-sys-spacing-6);
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  position: relative;
  overflow: hidden;
  transition:
    background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  box-shadow: none;
}

.md3-filled-button:hover {
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15); /* level 1 */
}

.md3-filled-button:active {
  box-shadow: none; /* level 0 */
}

.md3-filled-button .material-symbols-rounded {
  font-size: 18px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* ---- Outlined Button (medium emphasis) ---- */
.md3-outlined-button {
  --_btn-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: var(--md-sys-spacing-2);
  height: var(--_btn-height);
  padding: 0 var(--md-sys-spacing-6);
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
  position: relative;
  overflow: hidden;
  transition:
    border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
    background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-outlined-button:hover {
  border-color: var(--md-sys-color-primary);
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
}

.md3-outlined-button:active {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 12%, transparent);
}

.md3-outlined-button .material-symbols-rounded {
  font-size: 18px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* ---- Text Button (lowest emphasis) ---- */
.md3-text-button {
  display: inline-flex;
  align-items: center;
  gap: var(--md-sys-spacing-2);
  height: 40px;
  padding: 0 var(--md-sys-spacing-3);
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-primary);
  position: relative;
  overflow: hidden;
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-text-button:hover {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
}

.md3-text-button:active {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 12%, transparent);
}

.md3-text-button .material-symbols-rounded {
  font-size: 18px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* ============================================================
   14. CHIPS — MD3 Assist & Filter
   ============================================================ */
.md3-chip {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 var(--md-sys-spacing-4);
  border-radius: var(--md-sys-shape-corner-small);
  font: var(--md-sys-typescale-label-large);
  white-space: nowrap;
  transition:
    background-color var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard),
    border-color var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard);
}

/* Assist chip — secondary container */
.md3-chip--assist {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border: none;
}

/* Filter chip — outlined, with check state */
.md3-chip--filter {
  background-color: transparent;
  color: var(--md-sys-color-on-surface-variant);
  border: 1px solid var(--md-sys-color-outline);
}

/* Small chip variant */
.md3-chip--small {
  height: 26px;
  padding: 0 var(--md-sys-spacing-2);
  font: var(--md-sys-typescale-label-small);
  border-radius: var(--md-sys-shape-corner-extra-small);
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border: none;
}

/* ============================================================
   15. CARDS — MD3: Filled / Outlined / Elevated
   ============================================================ */
.md3-card {
  border-radius: var(--md-sys-shape-corner-medium);
  overflow: hidden;
  transition:
    box-shadow var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-standard),
    transform var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-standard),
    background-color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
}

/* Elevated Card — level 1, surface-container-low */
.md3-card--elevated {
  background-color: var(--md-sys-color-surface-container-low);
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15); /* level 1 */
}

.md3-card--elevated:hover {
  box-shadow: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3); /* level 3 */
  transform: translateY(-2px);
}

/* Filled Card — level 0, surface-container-highest */
.md3-card--filled {
  background-color: var(--md-sys-color-surface-container-highest);
  border: none;
}

.md3-card--filled:hover {
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15); /* level 1 */
  transform: translateY(-2px);
}

/* Outlined Card — level 0, outline-variant border */
.md3-card--outlined {
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.md3-card--outlined:hover {
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15); /* level 1 */
}

/* ============================================================
   16. BADGE (for project cards)
   ============================================================ */
.md3-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--md-sys-spacing-2);
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-small);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  white-space: nowrap;
}

/* ============================================================
   17. FAB (Floating Action Button)
   Level 3 at rest, shape: large (16px)
   ============================================================ */
.md3-fab {
  position: fixed;
  bottom: var(--md-sys-spacing-6);
  right: var(--md-sys-spacing-6);
  z-index: 90;
  width: 56px;
  height: 56px;
  border-radius: var(--md-sys-shape-corner-large);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3); /* level 3 */
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.8);
  transition:
    opacity var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized),
    transform var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized),
    box-shadow var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard),
    background-color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
}

.md3-fab--visible {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

/* Hover → level 4 */
.md3-fab:hover {
  box-shadow: 0 6px 10px 4px rgba(0,0,0,0.15), 0 2px 3px rgba(0,0,0,0.3); /* level 4 */
}

/* Active → back to level 3 */
.md3-fab:active {
  box-shadow: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3); /* level 3 */
}

.md3-fab .material-symbols-rounded {
  font-size: 24px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* ============================================================
   18. SECTION LAYOUT
   ============================================================ */
.md3-section {
  padding: var(--md-sys-spacing-20) var(--md-sys-spacing-4);
}

.md3-section--surface {
  background-color: var(--md-sys-color-surface-container-low);
}

.md3-section__container {
  max-width: 1200px;
  margin: 0 auto;
}

.md3-section__header {
  text-align: center;
  margin-bottom: var(--md-sys-spacing-12);
}

.md3-section__headline {
  color: var(--md-sys-color-on-surface);
  margin-bottom: var(--md-sys-spacing-3);
}

.md3-section__supporting {
  color: var(--md-sys-color-on-surface-variant);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================================
   19. HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 96px var(--md-sys-spacing-4) var(--md-sys-spacing-20);
  background: radial-gradient(
    ellipse 60% 50% at 50% 40%,
    var(--md-sys-color-primary-container),
    transparent 70%
  ), var(--md-sys-color-surface);
}

.hero__container {
  position: relative;
  z-index: 2;
  max-width: 680px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--md-sys-spacing-6);
}

/* Avatar */
.hero__avatar-wrapper {
  position: relative;
  margin-bottom: var(--md-sys-spacing-2);
}

.hero__avatar {
  width: 96px;
  height: 96px;
  border-radius: var(--md-sys-shape-corner-full);
  background: linear-gradient(
    135deg,
    var(--md-sys-color-primary),
    var(--md-sys-color-tertiary)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3); /* level 3 */
}

.hero__avatar-img {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
}

.hero__status-dot {
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: #4CAF50;
  border: 3px solid var(--md-sys-color-surface);
  box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15); /* level 1 */
}

.hero__headline {
  color: var(--md-sys-color-on-surface);
}

.hero__highlight {
  background: linear-gradient(
    135deg,
    var(--md-sys-color-primary),
    var(--md-sys-color-tertiary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__tagline {
  color: var(--md-sys-color-primary);
  margin-top: calc(-1 * var(--md-sys-spacing-4));
}

.hero__bio {
  color: var(--md-sys-color-on-surface-variant);
  max-width: 540px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--md-sys-spacing-3);
  justify-content: center;
  margin-top: var(--md-sys-spacing-2);
}

/* Decorative shapes */
.hero__decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.hero__shape {
  position: absolute;
  border-radius: var(--md-sys-shape-corner-full);
  opacity: 0.15;
  filter: blur(60px);
}

.hero__shape--1 {
  width: 300px; height: 300px;
  background-color: var(--md-sys-color-primary);
  top: 15%; right: -80px;
  animation: float-1 8s ease-in-out infinite;
}

.hero__shape--2 {
  width: 240px; height: 240px;
  background-color: var(--md-sys-color-tertiary);
  bottom: 20%; left: -60px;
  animation: float-2 10s ease-in-out infinite;
}

.hero__shape--3 {
  width: 180px; height: 180px;
  background-color: var(--md-sys-color-secondary);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation: float-3 12s ease-in-out infinite;
}

@keyframes float-1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33%      { transform: translate(-30px, 20px) rotate(5deg); }
  66%      { transform: translate(10px, -15px) rotate(-3deg); }
}

@keyframes float-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(20px, -25px) scale(1.1); }
}

@keyframes float-3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%      { transform: translate(-55%, -48%) scale(1.15); }
}

/* ============================================================
   20. ABOUT GRID
   ============================================================ */
.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--md-sys-spacing-6);
}

.about-card {
  padding: var(--md-sys-spacing-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--md-sys-spacing-4);
}

.about-card__icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--md-sys-shape-corner-large);
  background-color: var(--md-sys-color-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-card__icon {
  font-size: 28px;
  color: var(--md-sys-color-on-primary-container);
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

.about-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-2);
}

.about-card__content h3 {
  color: var(--md-sys-color-on-surface);
}

.about-card__content p {
  color: var(--md-sys-color-on-surface-variant);
}

/* ============================================================
   21. SKILLS
   ============================================================ */
.skills__grid {
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-8);
}

.skills__category {
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-4);
}

.skills__category h3 {
  color: var(--md-sys-color-on-surface);
}

.skills__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--md-sys-spacing-2);
}

/* ============================================================
   22. PROJECTS GRID
   ============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--md-sys-spacing-6);
}

.project-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.project-card:focus-visible {
  outline-offset: -3px;
}

.project-card__media {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-card__media--primary {
  background: linear-gradient(
    135deg,
    var(--md-sys-color-primary),
    var(--md-sys-color-primary-container)
  );
}

.project-card__media--tertiary {
  background: linear-gradient(
    135deg,
    var(--md-sys-color-tertiary),
    var(--md-sys-color-tertiary-container)
  );
}

.project-card__media--secondary {
  background: linear-gradient(
    135deg,
    var(--md-sys-color-secondary),
    var(--md-sys-color-secondary-container)
  );
}

.project-card__media::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 160px; height: 160px;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--md-sys-color-on-primary) 20%, transparent),
    transparent 70%
  );
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.project-card__media-icon {
  font-size: 56px;
  color: var(--md-sys-color-on-primary);
  position: relative;
  z-index: 1;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 48;
}

.project-card__content {
  padding: var(--md-sys-spacing-6);
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-3);
  flex: 1;
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--md-sys-spacing-2);
}

.project-card__title {
  color: var(--md-sys-color-on-surface);
}

.project-card__desc {
  color: var(--md-sys-color-on-surface-variant);
  flex: 1;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--md-sys-spacing-1);
}

.project-card__actions {
  display: flex;
  gap: var(--md-sys-spacing-2);
  margin-top: var(--md-sys-spacing-1);
}

/* ============================================================
   23. TIMELINE
   ============================================================ */
.timeline {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.timeline__item {
  display: flex;
  gap: var(--md-sys-spacing-4);
}

.timeline__indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 32px;
}

.timeline__dot {
  width: 16px;
  height: 16px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-primary);
  border: 3px solid var(--md-sys-color-primary-container);
  flex-shrink: 0;
  margin-top: 6px;
}

.timeline__dot--end {
  background-color: var(--md-sys-color-outline);
  border-color: var(--md-sys-color-surface-container);
}

.timeline__connector {
  width: 2px;
  flex: 1;
  background-color: var(--md-sys-color-primary-container);
  margin-top: -4px;
  margin-bottom: -4px;
}

.timeline__card {
  flex: 1;
  padding: var(--md-sys-spacing-5) var(--md-sys-spacing-6);
  margin-bottom: var(--md-sys-spacing-6);
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-1);
}

.timeline__date {
  color: var(--md-sys-color-primary);
}

.timeline__card h3 {
  color: var(--md-sys-color-on-surface);
}

.timeline__card p {
  color: var(--md-sys-color-on-surface-variant);
}

/* ============================================================
   24. CONTACT GRID
   ============================================================ */
.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--md-sys-spacing-4);
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  position: relative;
  padding: var(--md-sys-spacing-5) var(--md-sys-spacing-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--md-sys-spacing-2);
  text-align: center;
  overflow: hidden;
  cursor: pointer;
}

.contact-card__icon {
  font-size: 32px;
  color: var(--md-sys-color-primary);
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

.contact-card__label {
  color: var(--md-sys-color-on-surface);
}

.contact-card__value {
  color: var(--md-sys-color-on-surface-variant);
  word-break: break-all;
}

/* ============================================================
   25. INTERESTS GRID
   ============================================================ */
.interests__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--md-sys-spacing-6);
}

.interest-card {
  padding: var(--md-sys-spacing-6);
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-4);
}

.interest-card__header {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-3);
}

.interest-card__header h3 {
  color: var(--md-sys-color-on-surface);
}

.interest-card__icon {
  font-size: 32px;
  color: var(--md-sys-color-primary);
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

.interest-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--md-sys-spacing-1);
}

.interest-card__body {
  color: var(--md-sys-color-on-surface-variant);
}

.interest-card__body strong {
  color: var(--md-sys-color-on-surface);
}

/* ============================================================
   26. CURRENTLY LIST
   ============================================================ */
.currently__list {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-4);
}

.currently__item {
  display: flex;
  align-items: flex-start;
  gap: var(--md-sys-spacing-3);
  padding: var(--md-sys-spacing-4);
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface);
}

.currently__bullet {
  font-size: 24px;
  color: var(--md-sys-color-primary);
  flex-shrink: 0;
  margin-top: 1px;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* ============================================================
   27. DEVICES GRID
   ============================================================ */
.devices__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--md-sys-spacing-4);
  max-width: 800px;
  margin: 0 auto;
}

.device-card {
  padding: var(--md-sys-spacing-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--md-sys-spacing-3);
  text-align: center;
}

.device-card__icon {
  font-size: 36px;
  color: var(--md-sys-color-primary);
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

.device-card span:last-child {
  color: var(--md-sys-color-on-surface);
}

/* ============================================================
   28. QUOTE
   ============================================================ */
.quote {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: var(--md-sys-spacing-12) var(--md-sys-spacing-6);
  border-radius: var(--md-sys-shape-corner-extra-large);
  background-color: var(--md-sys-color-primary-container);
}

.quote__text {
  color: var(--md-sys-color-on-primary-container);
  margin-bottom: var(--md-sys-spacing-4);
  font-style: normal;
  letter-spacing: 0.05em;
}

.quote__attribution {
  color: var(--md-sys-color-on-primary-container);
  opacity: 0.8;
}

/* ============================================================
   29. FOOTER
   ============================================================ */
.footer {
  background-color: var(--md-sys-color-surface-container-low);
}

.footer md-divider {
  --md-divider-color: var(--md-sys-color-outline-variant);
}

.footer__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--md-sys-spacing-4) var(--md-sys-spacing-4);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--md-sys-spacing-2);
}

.footer__text {
  color: var(--md-sys-color-on-surface-variant);
}

/* ============================================================
   30. SCROLL ANIMATIONS
   Enters screen → emphasized decelerate (400ms)
   Exits screen → emphasized accelerate (200ms)
   ============================================================ */
.anim-enter {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-emphasized-decelerate),
    transform var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-emphasized-decelerate);
}

.anim-enter--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   31. RESPONSIVE — MD3 Breakpoints
   Compact: 0–599, Medium: 600–839, Expanded: 840+
   ============================================================ */

@media (max-width: 839px) {
  /* Scale down display sizes on medium screens */
  .typescale-display-large {
    font-size: 2.25rem;
    line-height: 2.75rem;
  }

  .typescale-headline-large {
    font-size: 1.75rem;
    line-height: 2.25rem;
  }

  /* Section spacing */
  .md3-section {
    padding: var(--md-sys-spacing-12) var(--md-sys-spacing-4);
  }
}

@media (max-width: 599px) {
  /* Compact: bottom navigation bar */
  .md3-top-app-bar__nav {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 64px;
    background-color: var(--md-sys-color-surface-container);
    border-top: 1px solid var(--md-sys-color-outline-variant);
    justify-content: space-around;
    padding: 0;
    gap: 0;
    z-index: 100;
    box-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 2px 6px 2px rgba(0,0,0,0.15); /* level 2 */
  }

  .md3-top-app-bar__subtitle {
    display: none;
  }

  .md3-nav-item {
    flex-direction: column;
    height: auto;
    min-height: 48px;
    padding: var(--md-sys-spacing-1) var(--md-sys-spacing-2);
    gap: 2px;
    border-radius: var(--md-sys-shape-corner-medium);
    min-width: 56px;
    justify-content: center;
  }

  .md3-nav-item__label {
    font-size: 0.6875rem;
  }

  .md3-nav-item__icon {
    font-size: 22px;
  }

  /* Hero */
  .hero {
    padding-top: 80px;
    padding-bottom: 100px;
    min-height: auto;
  }

  .hero__headline {
    font-size: 2rem;
    line-height: 2.5rem;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
  }

  .hero__actions .md3-filled-button,
  .hero__actions .md3-outlined-button {
    justify-content: center;
  }

  .hero__shape--1 { width: 180px; height: 180px; }
  .hero__shape--2 { width: 140px; height: 140px; }
  .hero__shape--3 { width: 100px; height: 100px; }

  /* Grid → single column */
  .about__grid,
  .projects__grid {
    grid-template-columns: 1fr;
  }

  .contact__grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Timeline */
  .timeline__item {
    gap: var(--md-sys-spacing-3);
  }

  .timeline__card {
    padding: var(--md-sys-spacing-4);
  }

  /* FAB above bottom nav */
  .md3-fab {
    bottom: 80px;
    right: var(--md-sys-spacing-4);
  }

  /* Footer with space for bottom nav */
  .footer__container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-bottom: 80px;
  }

  .md3-section__header {
    margin-bottom: var(--md-sys-spacing-8);
  }
}

@media (max-width: 480px) {
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .hero__avatar {
    width: 72px;
    height: 72px;
  }

  .project-card__media {
    height: 100px;
  }

  .project-card__media-icon {
    font-size: 40px;
  }

  .project-card__content {
    padding: var(--md-sys-spacing-4);
  }

  .interests__grid,
  .devices__grid {
    grid-template-columns: 1fr;
  }

  .quote {
    padding: var(--md-sys-spacing-8) var(--md-sys-spacing-4);
  }
}

/* ============================================================
   32. REDUCED MOTION (Accessibility)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}