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

:root {
  --c-bg: #faf9f7;
  --c-ink: #1a1c1b;
  --c-primary: #000000;
  --c-on-primary: #ffffff;
  --c-secondary: #0050cc;
  --c-secondary-container: #0266ff;
  --c-secondary-dim: #b3c5ff;
  --c-outline: #747878;
  --c-outline-variant: #c4c7c7;
  --c-muted: #444748;
  --c-muted-2: #6b6f6f;
  --c-surface-low: #f4f3f1;
  --c-tertiary-dim: #c6c6c6;
  --c-primary-container: #1c1b1b;
  --c-card-bg: #faf9f7;
  --c-glass: rgba(255, 255, 255, 0.5);
  --c-focus-ring: #0050cc;
  --c-danger: #d63636;
  --c-success: #1f9d55;
  --shader-opacity: 0.6;
  --nav-bg: rgba(250, 249, 247, 0.8);
  --mnav-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #faf9f7;

  /* Fixed-appearance tokens: intentionally the same in both themes
     because each one only ever appears against its own fixed-dark
     background (project cards, dev badge, tooltips) rather than
     against the page background, so it doesn't need to re-theme. */
  --c-warning: #f5b800;
  --c-status-live: #22c55e;
  --c-danger-soft: #ffb3b8;
  --c-danger-strong: #ff3d4d;
  --c-tooltip-bg: rgba(16, 16, 16, 0.98);
  --c-project-grad-1: #141414;
  --c-project-grad-2: #000000;

  /* Border tokens — derived from --c-outline via color-mix so they
     actually re-theme between light/dark instead of being a fixed gray. */
  --c-border-015: color-mix(in srgb, var(--c-outline) 15%, transparent);
  --c-border-02: color-mix(in srgb, var(--c-outline) 20%, transparent);
  --c-border-025: color-mix(in srgb, var(--c-outline) 25%, transparent);
  --c-border-03: color-mix(in srgb, var(--c-outline) 30%, transparent);

  /* Fixed white-on-black tokens for the always-dark projects section */
  --c-border-on-dark-008: rgba(255, 255, 255, 0.08);
  --c-border-on-dark-015: rgba(255, 255, 255, 0.15);
  --c-border-on-dark-025: rgba(255, 255, 255, 0.25);

  --gutter: 24px;
  --section-gap: 160px;
  --container-max: 1440px;

  --f-display: clamp(2.75rem, 11vw, 10rem);
  --f-headline-lg: clamp(2rem, 5vw, 4rem);
  --f-headline-md: clamp(1.375rem, 3vw, 2rem);
  --f-body-lg: 18px;
  --f-body-md: 16px;
  --f-label: 12px;

  color-scheme: light;
  transition:
    background-color 0.4s ease,
    color 0.4s ease;
}

html[data-theme="dark"] {
  --c-bg: #0d0e0d;
  --c-ink: #f1f1ef;
  --c-primary: #000000;
  --c-on-primary: #ffffff;
  --c-secondary: #4d8dff;
  --c-secondary-container: #4d8dff;
  --c-secondary-dim: #8fb4ff;
  --c-outline: #8a8f8f;
  --c-outline-variant: #3a3d3d;
  --c-muted: #a8adad;
  --c-muted-2: #8a8f8f;
  --c-surface-low: #151615;
  --c-tertiary-dim: #4a4d4d;
  --c-primary-container: #050505;
  --c-card-bg: #131413;
  --c-glass: rgba(255, 255, 255, 0.04);
  --c-focus-ring: #8fb4ff;
  --c-danger: #ff6b6b;
  --c-success: #4ade80;
  --shader-opacity: 0.28;
  --nav-bg: rgba(13, 14, 13, 0.75);
  --mnav-bg: rgba(19, 20, 19, 0.85);
  --footer-bg: #0a0b0a;
  color-scheme: dark;
}

html,
body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--c-bg);
}
body {
  font-family: "Inter", sans-serif;
  color: var(--c-ink);
  overflow-x: hidden;
}
body.loading {
  overflow: hidden;
  height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}
input,
textarea {
  font-family: inherit;
  color: inherit;
}

/* ============ SKIP LINK ============ */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 10000;
  background: var(--c-primary);
  color: var(--c-on-primary);
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 18px;
  transition: top 0.25s ease;
}
.skip-link:focus {
  top: 16px;
}

/* ============ FOCUS STATES (ACCESSIBILITY) ============ */
a:focus-visible,
button:focus-visible,
.mnav-item:focus-visible,
.case-study-btn:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--c-focus-ring);
  outline-offset: 3px;
  border-radius: 2px;
}
.theme-toggle:focus-visible,
.back-to-top:focus-visible {
  outline: 2px solid var(--c-focus-ring);
  outline-offset: 3px;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  width: 100%;
}

.label-mono {
  font-family: "JetBrains Mono", monospace;
  font-size: var(--f-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
}
.headline-lg {
  font-family: "Syne", sans-serif;
  font-size: var(--f-headline-lg);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.headline-md {
  font-family: "Syne", sans-serif;
  font-size: var(--f-headline-md);
  line-height: 1.25;
  font-weight: 600;
}
.display-xl {
  font-family: "Syne", sans-serif;
  font-size: var(--f-display);
  line-height: 0.9;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}
.body-lg {
  font-size: var(--f-body-lg);
  line-height: 1.6;
}
.body-md {
  font-size: var(--f-body-md);
  line-height: 1.6;
}

.accent {
  color: var(--c-secondary-container);
}
.muted {
  color: var(--c-muted);
}
.light {
  color: var(--c-on-primary);
}
.light-dim {
  color: var(--c-tertiary-dim);
}
.italic {
  font-style: italic;
}

.material-symbols-outlined {
  font-family: "Material Symbols Outlined";
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  direction: ltr;
  font-variation-settings: "FILL" 1;
}

::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-thumb {
  background: var(--c-ink);
}

/* ============ GLOBAL OVERFLOW SAFETY ============ */
section,
nav,
footer,
.container,
.hero-inner,
.nav-inner {
  max-width: 100%;
}

/* ============ REDUCED MOTION — GLOBAL SAFETY NET ============ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============ SMOOTH SCROLL (moved here from sections.css so project
   detail pages can share it without loading homepage-only styles) ============ */
html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* ============ SCROLL REVEAL (moved here from sections.css, same reason) ============ */
.stagger-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.stagger-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .stagger-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}