/* ==========================================================================
   UĞUR YOLU — MAIN (shared reset, base, header/nav, footer, components)
   Mobile-first. Media queries step UP at 480 / 768 / 1024 / 1280 (see tokens.css).
   Every value traces to a token in tokens.css.
   ========================================================================== */

/* ---- Reset / base ------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--base-ivory);
}

/* ---- Ambient gradient mesh (S5) -------------------------------------------
   Fixed color orbs in plum/slate/gold behind all content; the glass surfaces
   above sample it. Softness comes from the gradient falloff itself — no
   filter: blur here (a viewport-sized blurred layer stalls compositing).
   Oversized inset so the slow drift never exposes an edge. Single ambient
   drift is the one sanctioned motion loop (design.md §Motion, amended S5);
   reduced-motion switches it off. */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(42% 38% at 12% 18%, rgba(var(--base-plum-rgb), 0.20), transparent 72%),
    radial-gradient(46% 42% at 88% 10%, rgba(var(--base-slate-rgb), 0.18), transparent 72%),
    radial-gradient(38% 36% at 78% 82%, rgba(var(--base-gold-rgb), 0.20), transparent 72%),
    radial-gradient(34% 30% at 22% 88%, rgba(var(--base-slate-rgb), 0.14), transparent 72%),
    radial-gradient(24% 22% at 52% 46%, rgba(var(--base-red-rgb), 0.05), transparent 72%);
  animation: mesh-drift 60s var(--ease-standard) infinite alternate;
}

@keyframes mesh-drift {
  from { transform: translate3d(-2%, -1.5%, 0) scale(1); }
  to   { transform: translate3d(2%, 2%, 0) scale(1.06); }
}

@media (prefers-reduced-motion: reduce) {
  body::before {
    animation: none;
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  color: var(--color-headline);
  font-weight: 600;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }

p {
  max-width: var(--measure);
}

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--duration-fast) var(--ease-standard);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

::selection {
  background: var(--color-primary);
  color: var(--color-paper);
}

/* ---- Layout utilities --------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-6); }
}

.section {
  padding-block: var(--space-7);
}

@media (min-width: 768px) {
  .section { padding-block: var(--space-8); }
}

.section--tinted { background: var(--surface-section); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-eyebrow);
  margin-bottom: var(--space-3);
}

/* gold micro-accent: small angular marker before eyebrows */
.eyebrow::before {
  content: "";
  width: var(--space-3);
  height: var(--space-3);
  background: var(--color-micro);
  clip-path: polygon(0 0, 100% 50%, 0 100%); /* sharp chevron, no curves */
}

.section-head {
  margin-bottom: var(--space-6);
}

.section-head h2 {
  margin-bottom: var(--space-3);
}

/* ---- Visually hidden (honeypot, SR-only text) ---------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---- Skip link ---------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: var(--space-2);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--tap-min);
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-none);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--glass-highlight), var(--shadow-glass);
  transition:
    box-shadow var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}

.btn:hover,
.btn:focus-visible {
  box-shadow: var(--glass-highlight), var(--shadow-glass-hover);
  transform: translateY(-2px); /* lift off the glass */
}

.btn--primary {
  background: var(--color-cta-bg);
  color: var(--color-cta-ink);
}

.btn--secondary {
  background: var(--color-cta2-bg);
  color: var(--color-cta2-ink);
}

.btn--outline {
  background: var(--glass-white);
  color: var(--color-ink);
  border-color: var(--glass-border-ink);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
}

/* ---- Tags & workshop codes ---------------------------------------------- */
.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-tag-border);
  border-radius: var(--radius-none);
  background: var(--color-tag-bg);
  color: var(--color-tag-ink);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
}

.code-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: var(--color-code-bg);
  color: var(--color-code-ink);
  border: 1px solid rgba(var(--base-red-rgb), 0.4);
  border-radius: var(--radius-none);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
}

/* ---- Cards --------------------------------------------------------------- */
.card {
  background: var(--surface-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-none);
  box-shadow: var(--glass-highlight), var(--shadow-glass);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  padding: var(--space-5);
  transition:
    box-shadow var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

a.card,
.card--hover:hover,
.card--hover:focus-within {
  text-decoration: none;
}

.card--hover:hover,
.card--hover:focus-within {
  box-shadow: var(--glass-highlight), var(--shadow-glass-hover);
  transform: translateY(-3px);
}

/* ---- Header / nav --------------------------------------------------------- */
.site-header {
  background: var(--surface-nav);
  color: var(--surface-nav-ink);
  border-bottom: 1px solid var(--glass-nav-border);
  box-shadow: var(--shadow-glass-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}
/* NOTE: the header's backdrop-filter is applied at ≥lg only (see the desktop
   nav block). On mobile the slide-in panel is a DOM child of the header, and a
   backdrop-filter ancestor buffers its subtree — which stops the panel's own
   background from painting where it overflows the header box (unreadable menu).
   Mobile header stays near-opaque plum without blur; desktop keeps the glass. */

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--space-8);
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--surface-nav-ink);
  text-decoration: none;
  min-height: var(--tap-min);
}

.brand img {
  display: block;
  /* emblem has transparent background — reads on any nav surface */
}

.brand__text {
  display: flex;
  flex-direction: column;
}

.brand__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  white-space: nowrap;
  line-height: var(--leading-tight);
}

.brand__tagline {
  font-family: var(--font-body);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  opacity: 0.85;
}

/* Burger (mobile) */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: var(--tap-min);
  height: var(--tap-min);
  background: none;
  border: 2px solid var(--surface-nav-ink);
  border-radius: var(--radius-none);
  cursor: pointer;
}

.nav-toggle__bar {
  width: var(--space-5);
  height: 2px;
  background: var(--surface-nav-ink);
  transition: transform var(--duration-fast) var(--ease-standard),
              opacity var(--duration-fast) var(--ease-standard);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Overlay behind the mobile panel */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-ink);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-standard);
  z-index: 58;
}

.nav-overlay.is-open {
  opacity: 0.45;
  pointer-events: auto;
}

/* Slide-in panel (mobile) — opaque plum for legibility. A full-screen menu
   must stay readable, so no translucent glass here (the sticky header keeps
   its glass on desktop only). No backdrop-filter: it's pointless over an
   opaque surface and it triggered the ancestor-buffering paint bug above. */
.site-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(320px, 85vw);
  background: var(--base-plum);
  color: var(--surface-nav-ink);
  border-left: 1px solid var(--glass-nav-border);
  padding: var(--space-6) var(--space-5);
  transform: translateX(100%);
  transition: transform var(--duration-base) var(--ease-emphasized);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.site-nav.is-open {
  transform: none;
}

.site-nav__close {
  align-self: flex-end;
  width: var(--tap-min);
  height: var(--tap-min);
  background: none;
  border: 2px solid var(--surface-nav-ink);
  border-radius: var(--radius-none);
  color: var(--surface-nav-ink);
  font-size: var(--text-lg);
  line-height: 1;
  cursor: pointer;
}

.site-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-nav__link {
  display: flex;
  align-items: center;
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-2);
  color: var(--surface-nav-ink);
  font-family: var(--font-body);
  font-size: var(--text-md);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  text-decoration: none;
  position: relative;
}

/* underline-reveal on hover/focus */
.site-nav__link::after {
  content: "";
  position: absolute;
  left: var(--space-2);
  right: 100%;
  bottom: var(--space-1);
  height: 2px;
  background: var(--color-micro);
  transition: right var(--duration-fast) var(--ease-standard);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  right: var(--space-2);
}

.site-nav__link[aria-current="page"] {
  color: var(--surface-nav-ink);
}

/* Quick phone action in header */
.header-phone {
  display: none;
}

@media (min-width: 480px) {
  .header-phone {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: var(--tap-min);
    padding-inline: var(--space-3);
    color: var(--surface-nav-ink);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-decoration: none;
    border: 1px solid var(--surface-nav-ink);
  }
}

/* Desktop nav ≥ --bp-lg */
@media (min-width: 1024px) {
  .nav-toggle,
  .site-nav__close,
  .nav-overlay {
    display: none;
  }

  /* Header glass only kicks in here: at ≥lg the nav is inline (no slide-in
     panel), so the ancestor-buffering paint bug can't occur. */
  .site-header {
    -webkit-backdrop-filter: blur(var(--glass-blur-strong));
    backdrop-filter: blur(var(--glass-blur-strong));
  }

  .site-nav {
    position: static;
    width: auto;
    transform: none;
    border: 0;
    padding: 0;
    background: transparent;
    flex-direction: row;
    align-items: center;
  }

  .site-nav__list {
    flex-direction: row;
    gap: var(--space-4);
  }

  .site-nav__link {
    font-size: var(--text-sm);
  }
}

/* ---- CTA band ------------------------------------------------------------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  color: var(--color-paper);
  padding-block: var(--space-8);
}

.cta-band h2 {
  color: var(--color-paper);
  margin-bottom: var(--space-4);
}

.cta-band p {
  margin-bottom: var(--space-5);
}

/* ---- Footer ---------------------------------------------------------------- */
.site-footer {
  background: var(--surface-footer);
  color: var(--surface-footer-ink);
  border-top: 1px solid var(--glass-nav-border);
  -webkit-backdrop-filter: blur(var(--glass-blur-strong));
  backdrop-filter: blur(var(--glass-blur-strong));
  padding-block: var(--space-7) var(--space-5);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.site-footer a {
  color: var(--surface-footer-ink);
}

.site-footer__title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--surface-footer-ink); /* h2 default is plum — invisible on the plum footer */
  margin-bottom: var(--space-3);
  opacity: 0.75;
}

.site-footer ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer li a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min);
  text-decoration: none;
}

.site-footer li a:hover,
.site-footer li a:focus-visible {
  text-decoration: underline;
  text-decoration-color: var(--color-micro);
  text-decoration-thickness: 2px;
}

.site-footer__legal {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--surface-footer-ink);
  font-size: var(--text-sm);
  opacity: 0.8;
}

.site-footer__credit {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  opacity: 0.65;
}

.site-footer__credit a {
  color: var(--color-micro); /* gold micro-accent */
  text-decoration: none;
}

.site-footer__credit a:hover,
.site-footer__credit a:focus-visible {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

/* ---- Scroll reveal (used by js/appear.js) -----------------------------------
   Hidden state applies only once appear.js has tagged <html class="js">,
   so content is never invisible if JS fails to load. */
html.js .appear {
  opacity: 0;
  transform: translateY(14px);
}

html.js .appear.is-visible {
  opacity: 1;
  transform: none;
  transition:
    opacity var(--duration-slow) var(--ease-emphasized),
    transform var(--duration-slow) var(--ease-emphasized);
}

@media (prefers-reduced-motion: reduce) {
  html.js .appear {
    transform: none;
  }

  html.js .appear.is-visible {
    transition: opacity var(--duration-fast) linear;
  }

  .btn,
  .card,
  .btn:hover,
  .card--hover:hover {
    transition: none;
    transform: none;
  }
}

/* ---- Glass fallback (S5) ---------------------------------------------------
   No backdrop-filter → translucent panes would just look washed out, so
   snap the glass surfaces to (near-)opaque equivalents. */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .card,
  .btn--outline {
    background: var(--color-paper);
    border-color: var(--color-border);
  }

  .tag { background: var(--base-slate-pastel); }
  .code-tag { background: var(--base-red-pastel); }

  .site-header,
  .site-nav,
  .site-footer {
    background: var(--color-primary);
  }
}