/* ============================================================
   tokens.css — Layered Mind v3 design system
   See docs/design_system.md for rationale + WCAG contrast notes.
   "No generic AI aesthetics, production-grade, bold typography,
   creative layout, professional color, consistent spacing,
   hover effects."
   ============================================================ */

:root {
  /* --- Background ---------------------------------------- */
  --bg-primary:    #0F0B14;   /* app body */
  --bg-secondary:  #19161D;   /* nav glass base, input field */
  --bg-tertiary:   #232029;   /* card surface */
  --bg-elevated:   #2C2934;   /* tooltip, dropdown, toast */

  /* --- Brand --------------------------------------------- */
  --brand-primary: #AB9FF2;   /* primary lavender accent — single brand color */
  --brand-hover:   #8E80E0;
  --brand-muted:   #6E63B5;

  /* --- Accent (sparingly: 1–2 places) -------------------- */
  --accent-pink:   #FF6B9D;
  --accent-blue:   #4A9DFF;

  /* --- Text ---------------------------------------------- */
  --text-primary:   #FFFFFF;  /* headings, hero — 18.7:1 on bg-primary */
  --text-secondary: #B8B4C6;  /* body — 9.4:1 on bg-primary */
  --text-muted:     #ABA8BA;  /* meta, footer — 6.1:1 on bg-primary, 5.6:1 on bg-secondary, 4.7:1 on bg-tertiary (all WCAG AA) */

  /* --- Border -------------------------------------------- */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);

  /* --- Brand alpha variants (derived from --brand-primary #AB9FF2) --- */
  --brand-a06: rgba(171, 159, 242, 0.06);
  --brand-a08: rgba(171, 159, 242, 0.08);
  --brand-a10: rgba(171, 159, 242, 0.10);
  --brand-a18: rgba(171, 159, 242, 0.18);
  --brand-a20: rgba(171, 159, 242, 0.20);
  --brand-a35: rgba(171, 159, 242, 0.35);
  --brand-a50: rgba(171, 159, 242, 0.50);

  /* --- Type scale ---------------------------------------- */
  --fs-micro: 0.625rem;
  --fs-2xs:   0.6875rem;
  --fs-xs:    0.75rem;
  --fs-sm:    0.875rem;
  --fs-base:  1rem;
  --fs-md:    1.0625rem;
  --fs-lg:    1.125rem;
  --fs-xl:    1.5rem;
  --fs-2xl:   2rem;
  --fs-3xl:   2.5rem;
  --fs-4xl:   4rem;
  --fs-hero:  clamp(2.5rem, 8vw, 6rem);

  /* --- Letter spacing ------------------------------------ */
  --tracking-tight: -0.03em;
  --tracking-normal: 0;
  --tracking-mono:   0.16em;

  /* --- Line height --------------------------------------- */
  --leading-tight:  1.05;
  --leading-snug:   1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;

  /* --- Font families ------------------------------------- */
  --font-body:    'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* --- Spacing (8pt grid) -------------------------------- */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* --- Radius -------------------------------------------- */
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-pill: 999px;

  /* --- Layout -------------------------------------------- */
  --container-max: 1280px;
  --container-px:  clamp(1rem, 4vw, 3rem);
  --nav-height:    80px;
  --touch-target:  44px;  /* WCAG 2.5.5 AA minimum */

  /* --- Motion -------------------------------------------- */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:   cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce:   cubic-bezier(0.34, 1.56, 0.64, 1);

  --dur-micro:    150ms;
  --dur-std:      300ms;
  --dur-emphasis: 500ms;
  --dur-reveal:   600ms;
  --dur-long:     800ms;

  /* --- Shadows / glow ------------------------------------ */
  --shadow-card-hover: 0 0 0 1px var(--brand-primary), 0 16px 40px rgba(171, 159, 242, 0.10);
  --shadow-cta-hover:  0 12px 32px rgba(171, 159, 242, 0.35);
  --glow-brand:        0 0 24px var(--brand-primary);

  /* --- Z-index --------------------------------------- */
  --z-skip:    9999;
  --z-modal:   500;
  --z-toast:   400;
  --z-nav:     100;
  --z-cursor:  90;
  --z-content: 1;

  /* --- Breakpoints (reference only — media queries below) -
     --bp-md: 768px (tablet)
     --bp-lg: 1024px (desktop)
     --bp-xl: 1280px (large desktop)
  -------------------------------------------------------- */
}

/* Print overrides — siyah text, beyaz bg, no glassmorphism, no animations */
@media print {
  :root {
    --bg-primary:     #FFFFFF;
    --bg-secondary:   #FFFFFF;
    --bg-tertiary:    #FFFFFF;
    --bg-elevated:    #FFFFFF;
    --text-primary:   #000000;
    --text-secondary: #1F1F1F;
    --text-muted:     #555555;
    --brand-primary:  #2B1F66;
    --border-subtle:  #DDD;
    --border-strong:  #999;
  }
}

/* ============================================================
   base.css — reset, typography, layout primitives, fonts
   Order in <head>: tokens.css → base.css → components.css → effects.css → pages.css
   ============================================================ */

/* --- Self-hosted fonts ----------------------------------
   Inter is served as a variable woff2 by Google Fonts; one file
   covers weights 400–800. JetBrains Mono ships as static weights
   but 400 and 500 share the same woff2 file. We split each by
   unicode-range (latin + latin-ext) to support Turkish glyphs
   (İ, ı, ş, ğ, ç, ö, ü) without bloating the latin payload.
-------------------------------------------------------- */

/* Inter — Latin (US-ASCII + Western Europe) */
@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter/inter-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Inter — Latin-Ext (Turkish, Polish, Czech, Vietnamese-lite, ...) */
@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter/inter-latin-ext.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* JetBrains Mono — Latin */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../assets/fonts/jetbrains-mono/jbmono-latin.woff2') format('woff2');
  font-weight: 400 500;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* JetBrains Mono — Latin-Ext */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../assets/fonts/jetbrains-mono/jbmono-latin-ext.woff2') format('woff2');
  font-weight: 400 500;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* --- Modern reset (small) -------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  hanging-punctuation: first last;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 400;
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: color var(--dur-micro) var(--ease-out-expo);
}
a:hover { color: var(--brand-hover); }
a:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

p { text-wrap: pretty; }
h1, h2, h3, h4, h5 { text-wrap: balance; }

ul, ol { padding-left: var(--sp-6); }

/* --- Typography hierarchy -------------------------------- */

h1, .h1 {
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

@media (min-width: 1024px) {
  h1, .h1 { font-size: var(--fs-4xl); }
}

h2, .h2 {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

h3, .h3 {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--text-primary);
}

h4 {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--text-primary);
}

small, .small {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

code, kbd, pre {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

::selection {
  background: rgba(171, 159, 242, 0.25);
  color: var(--text-primary);
}

/* --- Focus rings (consistent everywhere) ----------------- */

:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

button:focus-visible,
[role='button']:focus-visible {
  outline-offset: 4px;
}

/* --- Skip link ------------------------------------------- */

.skip-link {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: var(--z-skip);
  padding: var(--sp-3) var(--sp-4);
  background: var(--brand-primary);
  color: var(--bg-primary);
  font-weight: 600;
  border-radius: var(--radius-md);
  transform: translateY(-200%);
  transition: transform var(--dur-std) var(--ease-out-expo);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* --- Layout primitives ----------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.stack > * + * { margin-top: var(--stack-space, var(--sp-6)); }
.stack-tight > * + * { margin-top: var(--sp-3); }
.stack-loose > * + * { margin-top: var(--sp-12); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cluster-gap, var(--sp-3));
  align-items: center;
}

.section {
  padding-block: var(--sp-16);
}
@media (min-width: 768px) {
  .section { padding-block: var(--sp-24); }
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--brand-primary);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: var(--sp-3);
}

.lead {
  font-size: var(--fs-lg);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  max-width: 65ch;
}

/* --- Visually hidden ------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Body lock (modal open) ------------------------------ */

body.modal-open { overflow: hidden; }

/* --- Print baseline (cv.html özellikle) ------------------ */

@media print {
  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
    line-height: 1.4;
  }
  .skip-link,
  .nav-bar,
  .nav-drawer,
  nav,
  footer,
  .site-footer,
  .cursor-blob,
  .custom-cursor,
  .toast,
  .no-print { display: none !important; }
  a { color: #000; text-decoration: underline; }
  h1, h2, h3 { page-break-after: avoid; }
  img, svg, table { page-break-inside: avoid; }
  .container { padding: 0; max-width: none; }
  .section { padding-block: 0.5cm; }
}

/* ============================================================
   components.css — buttons, cards, pills, eyebrows, nav, footer,
                    modal, form, toast, lang-toggle, avatar
   Phantom dark elegance: restraint over ornament.
   ============================================================ */

/* --- Buttons --------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur-std) var(--ease-out-expo),
              background-color var(--dur-std) var(--ease-out-expo),
              box-shadow var(--dur-std) var(--ease-out-expo),
              color var(--dur-std) var(--ease-out-expo);
  white-space: nowrap;
  user-select: none;
}

.btn:disabled,
.btn[aria-disabled='true'] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--brand-primary);
  color: var(--bg-primary);
}
.btn-primary:hover {
  background: var(--brand-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-cta-hover);
  color: var(--bg-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover {
  border-color: var(--brand-primary);
  background: var(--brand-a08);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--brand-primary);
  padding-inline: var(--sp-3);
}
.btn-ghost:hover {
  color: var(--brand-hover);
  background: var(--brand-a06);
}

.btn-icon {
  width: var(--touch-target);
  height: var(--touch-target);
  padding: 0;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.btn-icon:hover {
  background: var(--bg-elevated);
  border-color: var(--border-strong);
}
.btn-icon svg { width: 18px; height: 18px; }

.btn-small {
  padding: 8px 16px;
  font-size: var(--fs-sm);
}

/* --- Pills ----------------------------------------------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1;
  user-select: none;
}

.skill-pill {
  background: var(--brand-a10);
  color: var(--brand-primary);
  border: 1px solid var(--brand-a20);
}

.placeholder-pill {
  background-image:
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.04) 0,
      rgba(255, 255, 255, 0.04) 8px,
      transparent 8px,
      transparent 16px
    );
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px dashed var(--border-strong);
  cursor: help;
  transition: color var(--dur-std), border-color var(--dur-std);
}
.placeholder-pill:hover {
  color: var(--text-secondary);
  border-color: var(--brand-muted);
}

.lang-pill {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* --- Cards ----------------------------------------------- */

.card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  transition: border-color var(--dur-std) var(--ease-out-expo),
              box-shadow var(--dur-std) var(--ease-out-expo),
              transform var(--dur-std) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card-hover);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
}

/* --- Nav (sticky glassmorphism) -------------------------- */

.nav-bar {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(15, 11, 20, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  transition: padding var(--dur-std) var(--ease-out-expo);
}

.nav-bar.scrolled {
  padding-block: 0;
}

.nav-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: var(--sp-4);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
}
.nav-logo:hover { color: var(--brand-primary); }

.nav-logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav-logo-name {
  white-space: nowrap;
}

@media (max-width: 640px) {
  .nav-logo-name {
    font-size: var(--fs-md);
  }
}

.nav-links {
  display: none;
  gap: var(--sp-6);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  position: relative;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--fs-sm);
  padding: var(--sp-2) 0;
  text-decoration: none;
  transition: color var(--dur-micro);
}
.nav-links a:hover { color: var(--text-primary); }

.nav-links a[aria-current='page'] {
  color: var(--text-primary);
}
.nav-links a[aria-current='page']::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-primary);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.nav-toggle {
  display: inline-flex;
  width: var(--touch-target);
  height: var(--touch-target);
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-primary);
}
.nav-toggle:hover { background: var(--bg-tertiary); }

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
}

/* Mobile drawer */
.nav-drawer {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) + 1);
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  padding: var(--sp-8);
  transform: translateX(100%);
  transition: transform var(--dur-std) var(--ease-out-expo);
  visibility: hidden;
}
.nav-drawer[data-open='true'] {
  transform: translateX(0);
  visibility: visible;
}
.nav-drawer .nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  margin-top: var(--sp-12);
  font-size: var(--fs-xl);
}
.nav-drawer .nav-links a {
  font-size: var(--fs-2xl);
  font-weight: 600;
}

/* --- Lang toggle ----------------------------------------- */

.lang-toggle {
  display: inline-flex;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 3px;
}
.lang-toggle button {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-pill);
  transition: background var(--dur-std), color var(--dur-std);
  letter-spacing: var(--tracking-mono);
}
.lang-toggle button[aria-pressed='true'] {
  background: var(--brand-primary);
  color: var(--bg-primary);
}
.lang-toggle button:hover[aria-pressed='false'] {
  color: var(--text-primary);
}

/* --- Footer ---------------------------------------------- */

.site-footer {
  padding-block: var(--sp-16);
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  margin-top: var(--sp-32);
}

.site-footer .container {
  display: grid;
  gap: var(--sp-6);
}

@media (min-width: 768px) {
  .site-footer .container {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.footer-name {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--brand-primary);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
}

.footer-credits {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

.footer-rights {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* --- Modal ----------------------------------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  background: rgba(15, 11, 20, 0.78);
  backdrop-filter: blur(8px);
  padding: var(--sp-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-std), visibility 0s linear var(--dur-std);
}
.modal[data-open='true'] {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--dur-std), visibility 0s;
}

.modal-dialog {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: var(--sp-12);
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--dur-std) var(--ease-out-expo);
}
.modal[data-open='true'] .modal-dialog {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--sp-4);
  right: var(--sp-4);
  width: var(--touch-target); height: var(--touch-target);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* --- Form fields ----------------------------------------- */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.field label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.field input,
.field textarea {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-std), background var(--dur-std);
  font-family: var(--font-body);
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--text-muted);
}

.field input:hover,
.field textarea:hover {
  border-color: var(--border-strong);
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: none;
  border-color: var(--brand-primary);
  background: var(--bg-tertiary);
  box-shadow: 0 0 0 3px var(--brand-a18);
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field-error {
  font-size: var(--fs-sm);
  color: var(--accent-pink);
  min-height: 1.5em;
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* --- Toast ----------------------------------------------- */

.toast {
  position: fixed;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: var(--z-toast);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-std) var(--ease-out-expo),
              transform var(--dur-std) var(--ease-out-expo),
              visibility 0s linear var(--dur-std);
}
.toast:not([hidden]),
.toast[data-visible='true'] {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition: opacity var(--dur-std) var(--ease-out-expo),
              transform var(--dur-std) var(--ease-out-expo),
              visibility 0s;
}
.toast[data-type='success'] {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}
.toast[data-type='error'] {
  border-color: var(--accent-pink);
  color: var(--accent-pink);
}

/* --- Avatar (initial fallback) --------------------------- */

.avatar-initials {
  display: inline-grid;
  place-items: center;
  width: var(--avatar-size, 80px);
  height: var(--avatar-size, 80px);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--accent-pink));
  color: var(--bg-primary);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: calc(var(--avatar-size, 80px) * 0.42);
  letter-spacing: -0.04em;
  user-select: none;
  flex-shrink: 0;
}

/* --- Section divider rule -------------------------------- */

.divider {
  height: 1px;
  background: var(--border-subtle);
  border: 0;
  margin-block: var(--sp-12);
}

/* --- Timeline item (about deneyim/eÄŸitim) ---------------- */

.timeline {
  position: relative;
  padding-left: var(--sp-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--border-subtle);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--sp-8);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 14px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--bg-primary);
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

/* ============================================================
   effects.css — animations, keyframes, hero sequence,
                 scroll reveal, magnetic tilt, code rain canvas,
                 cursor blob, view transitions
   All animations honor prefers-reduced-motion.
   ============================================================ */

/* --- Hero entrance keyframes ----------------------------- */

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes glow-flash {
  0%   { text-shadow: 0 0 0 transparent; }
  30%  { text-shadow: 0 0 24px var(--brand-primary), 0 0 48px rgba(171, 159, 242, 0.4); }
  100% { text-shadow: 0 0 0 transparent; }
}

@keyframes layer-rise {
  from { opacity: 0; transform: translateY(-12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes drift {
  0%   { transform: translateY(-20%); opacity: 0; }
  10%  { opacity: 0.07; }
  90%  { opacity: 0.07; }
  100% { transform: translateY(120vh); opacity: 0; }
}

@keyframes spin-slow {
  from { transform: rotate(0); }
  to   { transform: rotate(360deg); }
}

/* --- Hero sequence orchestration -------------------------
   Hero text is visible immediately (no opacity:0 entrance) so LCP can paint
   without waiting for JS hydration. Atmospheric layers (code-rain canvas,
   arch-diagram entrance, name decode) carry the "sequence" feel without
   blocking the largest contentful paint.
-------------------------------------------------------- */

[data-hero-sequence] .hero-name.glowed {
  animation: glow-flash var(--dur-reveal) var(--ease-out-expo) forwards;
}

@media (prefers-reduced-motion: reduce) {
  [data-hero-sequence] .hero-name.glowed { animation: none !important; }
}

/* --- Code rain canvas ------------------------------------ */

canvas.code-rain {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  filter: blur(1px);
}

@media (max-width: 767px) {
  canvas.code-rain { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  canvas.code-rain { display: none; }
}

/* --- Cursor blob (and custom cursor) --------------------- */

.cursor-blob {
  position: fixed;
  top: 0;
  left: 0;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(
    closest-side,
    var(--brand-a18),
    var(--brand-a06) 60%,
    transparent 80%
  );
  filter: blur(80px);
  pointer-events: none;
  z-index: var(--z-cursor);
  mix-blend-mode: screen;
  transform: translate(-50%, -50%);
  transition: opacity var(--dur-emphasis);
  opacity: 0;
}

.cursor-blob[data-active='true'] {
  opacity: 1;
}

.custom-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--brand-primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: calc(var(--z-cursor) + 1);
  transform: translate(-50%, -50%);
  transition: width var(--dur-std) var(--ease-out-expo),
              height var(--dur-std) var(--ease-out-expo),
              border-color var(--dur-std);
  mix-blend-mode: difference;
  opacity: 0;
}

.custom-cursor::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 4px;
  height: 4px;
  background: var(--brand-primary);
  border-radius: 50%;
}

.custom-cursor[data-active='true'] { opacity: 0.8; }
.custom-cursor[data-hover='true'] {
  width: 48px;
  height: 48px;
}
.custom-cursor[data-hover='true']::after {
  display: none;
}

@media (max-width: 1023px), (pointer: coarse) {
  .cursor-blob, .custom-cursor { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor-blob, .custom-cursor { display: none; }
}

/* --- Magnetic tilt --------------------------------------- */

.tilt {
  transition: transform var(--dur-emphasis) var(--ease-out-expo);
  transform-style: preserve-3d;
  will-change: transform;
}
.tilt:hover {
  transform: translateY(-4px) scale(1.02);
}

.tilt-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: radial-gradient(
    300px at var(--mx, 50%) var(--my, 50%),
    var(--brand-a18),
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--dur-std);
  z-index: 1;
}

.tilt:hover .tilt-glow { opacity: 1; }

@media (max-width: 1023px), (pointer: coarse) {
  .tilt:hover {
    transform: scale(1.01);
  }
}

@media (prefers-reduced-motion: reduce) {
  .tilt:hover {
    transform: none;
  }
  .tilt-glow { display: none; }
}

/* --- Scroll reveal --------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--dur-reveal) var(--ease-out-expo),
              transform var(--dur-reveal) var(--ease-out-expo);
}

[data-reveal][data-revealed='true'] {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--dur-emphasis) var(--ease-out-expo),
              transform var(--dur-emphasis) var(--ease-out-expo);
}

[data-reveal-stagger][data-revealed='true'] > * {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger][data-revealed='true'] > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-stagger][data-revealed='true'] > *:nth-child(2) { transition-delay: 100ms; }
[data-reveal-stagger][data-revealed='true'] > *:nth-child(3) { transition-delay: 200ms; }
[data-reveal-stagger][data-revealed='true'] > *:nth-child(4) { transition-delay: 300ms; }
[data-reveal-stagger][data-revealed='true'] > *:nth-child(5) { transition-delay: 400ms; }
[data-reveal-stagger][data-revealed='true'] > *:nth-child(6) { transition-delay: 500ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* --- Arch diagram (SVG) ---------------------------------- */

.arch-diagram .layer {
  cursor: pointer;
  transition: opacity var(--dur-std) var(--ease-out-expo),
              transform var(--dur-std) var(--ease-out-expo),
              filter var(--dur-std) var(--ease-out-expo);
  transform-origin: center;
}

.arch-diagram .layer:hover {
  filter: drop-shadow(0 0 20px rgba(171, 159, 242, 0.6));
}

.arch-diagram[data-hovered='true'] .layer:not(:hover) {
  opacity: 0.4;
}

.arch-diagram .layer rect.layer-tile {
  fill: var(--bg-tertiary);
  stroke: var(--border-strong);
  stroke-width: 1;
  transition: fill var(--dur-std), stroke var(--dur-std), stroke-width var(--dur-std);
}

.arch-diagram .layer:hover rect.layer-tile {
  fill: var(--brand-a10);
  stroke: var(--brand-primary);
  stroke-width: 2;
}

.arch-diagram .layer text.layer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  fill: var(--brand-primary);
  text-transform: uppercase;
  pointer-events: none;
}

.arch-diagram .layer text.layer-subtitle {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--text-secondary);
  pointer-events: none;
}

.arch-diagram .connector {
  stroke: rgba(171, 159, 242, 0.15);
  stroke-width: 1;
  fill: none;
}

@keyframes layer-entrance {
  from { opacity: 0; transform: translateY(-12px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

[data-hero-sequence][data-state='ready'] .arch-diagram .layer {
  animation: layer-entrance var(--dur-emphasis) var(--ease-out-expo) forwards;
  opacity: 0;
}

[data-hero-sequence][data-state='ready'] .arch-diagram .layer[data-layer='presentation'] { animation-delay: 1200ms; }
[data-hero-sequence][data-state='ready'] .arch-diagram .layer[data-layer='application']  { animation-delay: 1400ms; }
[data-hero-sequence][data-state='ready'] .arch-diagram .layer[data-layer='domain']       { animation-delay: 1600ms; }
[data-hero-sequence][data-state='ready'] .arch-diagram .layer[data-layer='data']         { animation-delay: 1800ms; }

@media (prefers-reduced-motion: reduce) {
  .arch-diagram .layer {
    opacity: 1 !important;
    animation: none !important;
    transition: none !important;
  }
}

/* --- View transitions ----------------------------------- */

@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 200ms;
  animation-timing-function: var(--ease-out-expo);
}

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none !important;
  }
}

/* --- Counter animation ----------------------------------- */

.counter {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-3xl);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  font-variant-numeric: tabular-nums;
  display: inline-block;
}

/* ============================================================
   pages.css — page-specific layouts.
   Populated as pages are built (Faz 4).
   ============================================================ */

/* --- index.html ------------------------------------------ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--sp-8);
  padding-block: var(--sp-16);
}

@media (min-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--sp-16);
  }
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--brand-primary);
  letter-spacing: var(--tracking-mono);
  text-transform: lowercase;
  margin-bottom: var(--sp-3);
}

.hero-name {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin-bottom: var(--sp-6);
}

.hero-name .name-char {
  display: inline-block;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  color: var(--text-primary);
  line-height: var(--leading-snug);
  margin-bottom: var(--sp-3);
  max-width: 30ch;
}

.hero-subtitle {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 55ch;
  line-height: var(--leading-relaxed);
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6);
  margin-block: var(--sp-8);
  padding: var(--sp-4) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-metric {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.hero-metric-value {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  font-variant-numeric: tabular-nums;
}

.hero-metric-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.arch-diagram-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.arch-diagram {
  width: 100%;
  max-width: 480px;
  height: auto;
  filter: drop-shadow(0 32px 64px rgba(0, 0, 0, 0.4));
}

@media (max-width: 767px) {
  .arch-diagram { max-width: 280px; }
  .arch-diagram-wrapper { min-height: 280px; }
}

.featured-project {
  position: relative;
}

.featured-project-grid {
  display: grid;
  gap: var(--sp-8);
}

@media (min-width: 768px) {
  .featured-project-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.featured-project-title { margin-top: var(--sp-3); }
.featured-project-summary { margin-top: var(--sp-3); color: var(--text-secondary); }
.featured-project-stack { margin-top: var(--sp-4); }
.featured-project-cta { margin-top: var(--sp-6); }

.capabilities-grid {
  display: grid;
  gap: var(--sp-6);
}

@media (min-width: 768px) {
  .capabilities-grid {
    /* Sprint 15: minmax(0, 1fr) prevents min-content overflow expanding the
       first card when its descriptor (or counter glyph width) is wider than
       the share allocated by `1fr`. With auto-minimum (default), columns can
       grow beyond 1fr to fit content; minmax(0, 1fr) forces equal columns
       and lets text wrap inside. */
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.cta-banner {
  background: linear-gradient(135deg, var(--brand-a06), rgba(255, 107, 157, 0.04));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--sp-12);
  text-align: center;
}

@media (min-width: 768px) {
  .cta-banner { padding: var(--sp-16); }
}

/* --- about.html ------------------------------------------ */

.about-grid {
  display: grid;
  gap: var(--sp-12);
}

@media (min-width: 1024px) {
  .about-grid {
    grid-template-columns: 2fr 1fr;
  }
}

.about-bio p + p { margin-top: var(--sp-4); }

.about-meta-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  position: sticky;
  top: var(--sp-24);
  align-self: start;
}

@media (max-width: 1023px) {
  .about-meta-card { position: static; }
}

.languages-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.language-pill {
  display: inline-flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  min-width: 96px;
}

.language-pill-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--fs-sm);
}

.language-pill-level {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--brand-primary);
  letter-spacing: var(--tracking-mono);
}

/* --- skills.html — certificates + soft-skills (bento lives in skills.css) --- */

.certificates-list {
  display: grid;
  gap: var(--sp-3);
  list-style: none;
  padding: 0;
  margin: 0;
}

.certificate-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--sp-4);
  padding: var(--sp-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  align-items: center;
}

.certificate-year {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--brand-primary);
  letter-spacing: var(--tracking-mono);
}

.certificate-title {
  font-weight: 500;
  color: var(--text-primary);
}

.certificate-issuer {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.soft-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sp-4);
}

/* --- projects.html --------------------------------------- */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-8);
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  overflow: hidden;
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.project-card-year {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-mono);
}

.project-card-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--sp-2);
}

.project-card-architecture {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--brand-primary);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}

.project-card-summary {
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
}

.project-card-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-6);
}

.project-card-actions {
  display: flex;
  gap: var(--sp-2);
  margin-top: auto;
}

.modal-project-features,
.modal-project-learnings {
  margin-top: var(--sp-6);
}

.modal-project-features ul,
.modal-project-learnings ul {
  list-style: none;
  padding: 0;
}

.modal-project-features li,
.modal-project-learnings li {
  position: relative;
  padding-left: var(--sp-6);
  margin-bottom: var(--sp-3);
  color: var(--text-secondary);
}

.modal-project-features li::before,
.modal-project-learnings li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--brand-primary);
  font-family: var(--font-mono);
  font-weight: 500;
}

/* --- Language-driven visibility (no-FOUC, no-CLS) -------
   lang-init.js sets <html lang> synchronously in <head> BEFORE body parses,
   so we can pre-style the inactive cv-content block (avoiding the layout
   shift when JS later toggles via [hidden]). The :is() bumps specificity
   over the [hidden] user-agent rule.
-------------------------------------------------------- */

html[lang='en'] :is([data-cv-lang='tr']) { display: none !important; }
html[lang='en'] :is([data-cv-lang='en'][hidden]) { display: revert !important; }
html[lang='tr'] :is([data-cv-lang='en']) { display: none !important; }
html[lang='tr'] :is([data-cv-lang='tr'][hidden]) { display: revert !important; }

/* --- cv.html --------------------------------------------- */

.cv-controls {
  position: sticky;
  /* Sprint 14: track LIVE nav-bar height so scrolled-state nav shrink
     doesn't leave a gap above this sticky bar. Falls back to static
     --nav-height when JS hasn't set the current value yet (pre-hydration). */
  top: var(--nav-height-current, var(--nav-height));
  background: rgba(15, 11, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding-block: var(--sp-3);
  margin-bottom: var(--sp-4);
  z-index: calc(var(--z-nav) - 1);
  transition: top var(--dur-std) var(--ease-out-expo);
}

.cv-controls .container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: center;
  justify-content: space-between;
}

.cv-controls-actions {
  display: flex;
  gap: var(--sp-2);
}

.cv-page {
  max-width: 800px;
  margin-inline: auto;
  /* Sprint 11 Bug 2: cv-controls bar acts as visual header — override .section
     default padding-block (sp-16/sp-24) to eliminate the ~144px dead gap
     between the controls bar and the CV title. */
  padding-block: var(--sp-4) var(--sp-16);
}

@media (min-width: 768px) {
  .cv-page { padding-block: var(--sp-6) var(--sp-24); }
}

.cv-section {
  margin-bottom: var(--sp-12);
}

.cv-section-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: var(--sp-2);
  margin-bottom: var(--sp-4);
}

@media print {
  .cv-controls { display: none; }
  .cv-page { max-width: none; padding: 0; }
  .cv-section { margin-bottom: 0.4cm; }
  .cv-section-title { font-size: 13pt; margin-bottom: 0.2cm; padding-bottom: 0.1cm; }
  .cv-section h1 { font-size: 22pt; margin-bottom: 0.1cm; }
  .cv-section p, .cv-section li { font-size: 10pt; line-height: 1.35; }
  .cv-section ul { margin-top: 0.15cm; padding-left: 0.6cm; }
  .cv-section ul li { margin-bottom: 0.05cm; }
  .cv-section article { margin-bottom: 0.3cm; }
  .cv-section .divider, hr.divider { display: none; }
  /* Sprint 20: Projects section is web-only — kept off the printed/PDF CV
     so the document stays compact and matches a classical CV layout.
     Recruiters still see the projects on the live web page. */
  .cv-projects-section { display: none !important; }
  /* Multi-column for the certificates list to compress vertical space */
  #certificates ul { columns: 2; column-gap: 0.6cm; }
  #certificates li { break-inside: avoid; }
  body { padding: 1cm 1cm; font-size: 10pt; }
}

/* --- contact.html ---------------------------------------- */

.contact-grid {
  display: grid;
  gap: var(--sp-12);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--sp-16);
  }
}

.contact-direct {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
}

.contact-method-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--brand-a10);
  display: grid;
  place-items: center;
  color: var(--brand-primary);
  flex-shrink: 0;
}

.contact-method-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  margin-bottom: var(--sp-1);
}

.contact-method-value {
  color: var(--text-primary);
  word-break: break-word;
}

.contact-method-value a { color: var(--text-primary); }
.contact-method-value a:hover { color: var(--brand-primary); }

/* --- 404.html -------------------------------------------- */

.notfound {
  min-height: calc(100vh - 200px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-block: var(--sp-16);
  gap: var(--sp-6);
}

.notfound-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

.notfound-code {
  font-family: var(--font-mono);
  color: var(--brand-primary);
  font-size: var(--fs-2xl);
  letter-spacing: var(--tracking-mono);
}

/* ============================================================
   skills.css — Sprint 4.8 Nuclear Rewrite (single source of truth)
   Class prefix: sk-* (no legacy collision with bento-*, hex-*,
   constellation-*, deprecated-*). All previous Sprint 1/4.5/4.6/4.7
   skills CSS deleted.
   ============================================================ */

/* ----- Layout container --------------------------------------- */

.sk-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-auto-rows: 200px;
  grid-auto-flow: dense;
  gap: var(--sp-3);
  margin-top: var(--sp-8);
}

@media (max-width: 1023px) {
  .sk-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  .sk-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 180px;
    gap: var(--sp-2);
  }
}

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

/* ----- Cell base (ALL tiers share) --------------------------- */

.sk-cell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  padding: var(--sp-6);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition:
    background-color 200ms var(--ease-out-expo),
    border-color 200ms var(--ease-out-expo),
    transform 200ms var(--ease-out-expo),
    box-shadow 200ms var(--ease-out-expo);
}

.sk-cell:hover {
  background: var(--brand-a06);
  border-color: var(--brand-a50);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.32);
}

.sk-cell:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

/* ----- Cell head (logo TL + eyebrow TR via flex) ------------- */
/*
   FLEX container with justify-content: space-between guarantees
   logo and eyebrow occupy opposite ends of the same row.
   Mathematical impossibility of overlap.
*/

.sk-cell-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
}

.sk-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.sk-logo--mono {
  color: var(--brand-primary);
  opacity: 0.85;
}

.sk-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  align-self: flex-start;
  white-space: nowrap;
  margin-top: var(--sp-1);
}

/* ----- Cell body (name + descriptor) ------------------------- */

.sk-name {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  line-height: 1.1;
  margin: 0;
  align-self: end;
}

.sk-desc {
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
}

/* ----- HERO (2x2, larger logo, metadata chips) --------------- */

.sk-cell--hero {
  grid-column: span 2;
  grid-row: span 2;
  padding: var(--sp-8);
  background: linear-gradient(135deg, var(--brand-a06), rgba(74, 157, 255, 0.03));
  grid-template-rows: auto 1fr auto auto;
}

.sk-cell--hero .sk-logo {
  width: 80px;
  height: 80px;
}

.sk-cell--hero .sk-name {
  font-size: clamp(2.5rem, 4.5vw, 3.75rem);
  line-height: 1;
}

.sk-cell--hero .sk-desc {
  font-size: var(--fs-md);
  max-width: 36ch;
}

.sk-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.sk-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-pill);
  background: var(--brand-a10);
  border: 1px solid var(--brand-a20);
  color: var(--brand-primary);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ----- FEATURED (2x1, animated gradient border) -------------- */

@property --sk-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

.sk-cell--featured {
  grid-column: span 2;
  grid-row: span 1;
  border-color: transparent;
  background-clip: padding-box;
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.4) inset,
    0 4px 18px rgba(0, 0, 0, 0.32);
}

.sk-cell--featured::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 2px;
  border-radius: inherit;
  background: conic-gradient(
    from var(--sk-angle),
    var(--brand-primary) 0deg,
    var(--accent-pink) 90deg,
    var(--brand-primary) 180deg,
    var(--accent-blue) 270deg,
    var(--brand-primary) 360deg
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  z-index: -1;
  animation: sk-rotate-border 6s linear infinite;
}

@keyframes sk-rotate-border {
  to { --sk-angle: 360deg; }
}

.sk-cell--featured .sk-logo {
  width: 48px;
  height: 48px;
}

.sk-cell--featured .sk-name {
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
}

.sk-cell--featured:hover {
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.4) inset,
    0 6px 22px var(--brand-a18);
}

/* ----- STANDARD (1x1) ---------------------------------------- */

.sk-cell--standard {
  grid-column: span 1;
  grid-row: span 1;
}

.sk-cell--standard .sk-name {
  font-size: var(--fs-md);
  font-weight: 600;
}

.sk-cell--standard .sk-desc {
  font-size: var(--fs-xs);
  line-height: 1.4;
}

/* ----- COMPACT (1x1, tighter) -------------------------------- */

.sk-cell--compact {
  grid-column: span 1;
  grid-row: span 1;
  padding: var(--sp-4);
  grid-template-rows: auto 1fr;
}

.sk-cell--compact .sk-logo {
  width: 32px;
  height: 32px;
}

.sk-cell--compact .sk-name {
  font-size: var(--fs-sm);
  font-weight: 600;
  align-self: end;
}

/* ----- Reduced motion ---------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .sk-cell {
    transition: none;
  }
  .sk-cell:hover {
    transform: none;
  }
  .sk-cell--featured::before {
    animation: none;
  }
}

/* ----- Mobile sizing tweaks ---------------------------------- */

@media (max-width: 767px) {
  .sk-cell--hero,
  .sk-cell--featured {
    grid-column: span 2;
    grid-row: span 1;
    padding: var(--sp-6);
  }
  .sk-cell--hero .sk-logo {
    width: 56px;
    height: 56px;
  }
  .sk-cell--hero .sk-name {
    font-size: clamp(2rem, 8vw, 2.5rem);
  }
  /* Static border on mobile (perf) */
  .sk-cell--featured::before {
    animation: none;
  }
}

@media (max-width: 480px) {
  .sk-cell--hero,
  .sk-cell--featured,
  .sk-cell--standard,
  .sk-cell--compact {
    grid-column: span 1;
    grid-row: auto;
  }
}