/*
 * kaira.top — Design System v2 · EDITORIAL CAREER OS
 * Warm white / black / grey base + high-saturation category accents.
 * Full-viewport editorial grid, 1px borders, minimal radius, big type.
 */

:root {
  color-scheme: light;

  /* surfaces */
  --bg-main: #DCEBFA;
  --bg-paper: #F4F9FF;
  --bg-white: #ffffff;

  /* text */
  --text-primary: #111111;
  --text-secondary: #64625e;
  --text-muted: #96928a;

  /* lines */
  --line: #B9D2EA;
  --line-strong: #111111;

  /* high-saturation accents — category semantics */
  --c-blue: #2447ff;       /* Website / Strategy */
  --c-orange: #ff5a1f;    /* SEO */
  --c-lime: #c7ff38;      /* Analytics / Data */
  --c-pink: #ff4fa3;      /* AI / Automation */
  --c-yellow: #ffd84d;    /* Advertising / Growth */

  /* generic accent = ink (editorial) */
  --accent: #111111;
  --accent-soft: #2447ff;

  /* spacing scale */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 120px;

  /* radius — editorial swiss, never large */
  --radius-sm: 4px;
  --radius-md: 8px;

  /* motion */
  --transition-fast: 180ms ease;
  --transition-base: 280ms ease;

  --pad-x: clamp(1.25rem, 5vw, 5rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text-primary);
  background: var(--bg-main);
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible {
  outline: 2px solid var(--c-blue);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.8rem;
  left: 0.8rem;
  transform: translateY(-200%);
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  color: #fff;
  background: var(--text-primary);
  font-size: 0.85rem;
}

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

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 4.25rem;
  padding: 0 var(--pad-x);
  background: rgba(244, 241, 234, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

nav a:hover {
  color: var(--text-primary);
}

nav a[aria-current="page"] {
  color: var(--text-primary);
  border-bottom: 2px solid var(--text-primary);
}

/* ============ Layout shell ============ */
main {
  padding: 0 var(--pad-x);
}

/* ============ Type ============ */
.eyebrow,
.section-label {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-label {
  color: var(--c-orange);
  font-weight: 700;
}

h1, h2, h3 {
  margin-top: 0;
  color: var(--text-primary);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.02;
}

h1 {
  font-size: clamp(2.75rem, 8vw, 7rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(2rem, 4.5vw, 3.75rem);
}

em {
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* ============ Home hero ============ */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(12rem, 0.25fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  min-height: calc(100vh - 4.25rem);
  padding: var(--space-xl) 0 var(--space-lg);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero-portrait {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  z-index: 0;
  margin: 0;
  pointer-events: none;
}

.hero-portrait img {
  display: block;
  height: min(88vh, 720px);
  width: auto;
  mix-blend-mode: multiply;
  opacity: 0.92;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-side {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin: 1.25rem 0 0;
  max-width: 14ch;
}

.hero-intro {
  max-width: 32rem;
  margin: 1.75rem 0 0;
  color: var(--text-secondary);
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
}

.hero-meta {
  margin-top: 2.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 2.25rem;
}

/* ============ Buttons / links ============ */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.9rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--text-primary);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-primary);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.button:hover {
  background: var(--text-primary);
  color: var(--bg-paper);
}

.button-primary {
  background: var(--text-primary);
  color: var(--bg-paper);
}

.button-primary:hover {
  background: var(--c-blue);
  border-color: var(--c-blue);
}

.text-link {
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}

.text-link:hover {
  border-bottom-color: var(--text-primary);
}

/* ============ Sections ============ */
.content-section {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--line);
}

.section-content {
  max-width: 46rem;
}

.section-content > p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.details-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2.5rem;
  margin: 3rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.details-list dt {
  margin-bottom: 0.35rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.details-list dd {
  margin: 0;
  color: var(--text-primary);
}

/* ============ Footer ============ */
.site-footer {
  padding: var(--space-lg) var(--pad-x) 2.5rem;
  border-top: 1px solid var(--line);
}

.footer-big {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.footer-big a {
  border-bottom: 3px solid var(--c-orange);
  transition: color var(--transition-fast);
}

.footer-big a:hover {
  color: var(--c-blue);
}

.footer-small {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 3rem 0 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---- shared footer social row (rendered by social.js) ---- */
.footer-social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  margin: 1.6rem 0 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.footer-social .social-link {
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.footer-social .social-link:hover {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

/* ---- shared copy / mask buttons (used by social.js) ---- */
.copy-btn,
.mask-btn {
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  text-transform: uppercase;
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast);
}

.copy-btn:hover,
.mask-btn:hover {
  background: var(--text-primary);
  color: var(--bg-paper);
  border-color: var(--text-primary);
}

/* ============ Editorial Card System (shared) ============
   border-driven, zero shadow, 4-8px radius.
   Variants: .card--compact (meta rows) / default (standard) / .card--feature (key project/article) */
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-paper);
  padding: 1.5rem;
  transition: border-color var(--transition-fast), background var(--transition-fast),
    transform var(--transition-fast);
}
.card:hover { border-color: var(--text-primary); }
.card--compact { padding: 0.9rem 1rem; }
.card--feature { padding: clamp(1.75rem, 3vw, 2.5rem); }
.card-eyebrow {
  margin: 0; color: var(--text-muted);
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
}
.card-title {
  margin: 0.6rem 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400; letter-spacing: -0.015em; line-height: 1.12;
}
.card--feature .card-title { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.card:not(.card--compact):not(.card--feature) .card-title { font-size: clamp(1.35rem, 1.6vw, 1.6rem); }
.card-desc {
  margin: 0.7rem 0 0; color: var(--text-secondary);
  font-size: 0.93rem; line-height: 1.6;
}
.card-meta {
  margin: 1rem 0 0; padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
}
.card-action {
  display: inline-flex; margin-top: 1.1rem;
  color: var(--c-blue);
  font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.hairline-grid {
  display: grid; gap: 1px;
  border: 1px solid var(--line); background: var(--line);
}
.hairline-grid > * { background: var(--bg-paper); }

/* ============ Responsive ============ */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
    min-height: auto;
    padding-top: 3.5rem;
  }

  .hero-portrait img {
    height: min(60vh, 420px);
    opacity: 0.55;
  }

  nav {
    gap: 0;
  }

  nav a {
    padding: 0 0.55rem;
    font-size: 0.75rem;
  }
}

@media (max-width: 560px) {
  .details-list {
    grid-template-columns: 1fr;
  }

  .hero-actions .button {
    min-height: 2.6rem;
    padding: 0.5rem 0.9rem;
    font-size: 0.78rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

/* ============ Force light theme (resist browser / OS auto-dark) ============ */
:root { color-scheme: light only; }
html { background: #DCEBFA; }
body { background: #DCEBFA !important; color: #111111 !important; }
@media (prefers-color-scheme: dark) {
  :root { color-scheme: light only; }
  html { background: #DCEBFA; }
  body { background: #DCEBFA !important; color: #111111 !important; }
  input, textarea, select, button {
    background: #faf9f6; color: #111111;
  }
}

/* force light on floating panels / drawers / modals (resist browser auto-dark) */
.skill-drawer, .match-panel, .match-modal, .match-backdrop {
  background: var(--bg-paper) !important;
  color: var(--text-primary) !important;
}
.skill-drawer .drawer-title, .match-panel .match-title { color: var(--text-primary) !important; }
.skill-drawer .drawer-eyebrow, .match-panel .match-eyebrow { color: var(--c-orange) !important; }
.skill-drawer .drawer-label, .match-panel .match-label { color: var(--text-muted) !important; }