/* Rock Terra Tech — layout & components (colors → theme.css) */
:root {
  /* LTR defaults — overridden for RTL in html[dir="rtl"] */
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --radius: 14px;
  --radius-sm: 8px;
  --container: min(1180px, 92vw);
  --header-height: 3.25rem;
  --header-height-scrolled: 3.75rem;
  --header-float-top: 0.875rem;
  --header-bar-width: 65%;
  --header-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-transition: 0.65s var(--header-ease);
  --header-scroll-p: 0;
  --header-pad-x: clamp(1.25rem, 4.5vw, 3rem);
  --header-pad-x-compact: clamp(1rem, 2.5vw, 1.5rem);
  --header-pad-y: 0.45rem;
  --header-pad-y-scrolled: 0.55rem;
  --header-inner-gap: 0.65rem;
  --header-inner-gap-scrolled: 1.125rem;
  --header-tools-gap: 0.5rem;
  --header-tools-gap-scrolled: 0.65rem;
  --header-bar-margin-x: 0;
  --header-bar-radius: 999px;
  --header-content-offset: calc(var(--header-float-top) + var(--header-height) + 0.75rem);
  --header-content-offset-scrolled: calc(var(--header-height-scrolled) + 0.5rem);
  --page-below-header: clamp(2.5rem, 8vh, 4.5rem);
  --nav-list-gap: 0;
  --nav-list-gap-scrolled: 0.25rem;
  --nav-list-pad: 0.1rem 0.25rem;
  --nav-link-pad: 0.35rem 0.65rem;
  --nav-link-font: 0.75rem;
  --nav-link-pad-scrolled: 0.42rem 0.78rem;
  --nav-link-font-scrolled: 0.8125rem;
  --btn-padding-y: 0.55rem;
  --btn-padding-x: 1.15rem;
  --btn-font-size: 0.875rem;
  --btn-font-weight: 600;
  --btn-min-height: 2.375rem;
  --btn-sm-padding-y: 0.4rem;
  --btn-sm-padding-x: 0.85rem;
  --btn-sm-font-size: 0.8125rem;
  --btn-sm-min-height: 2rem;
}

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

html {
  scroll-behavior: smooth;
  min-height: 100%;
  min-height: 100dvh;
  background-color: var(--color-bg);
}

body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  background-color: var(--color-bg);
  background-image: var(--pattern-body);
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  background-size: 100% 100%, 100% 100%, auto, auto;
  background-attachment: scroll;
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--pattern-tunnel), var(--pattern-grid);
  background-repeat: repeat, repeat;
  opacity: 0.65;
}

/* Sticky footer: short pages keep footer at viewport bottom */
#main-content {
  flex: 1 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
  background: transparent;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover { color: var(--color-accent-light); }

.container {
  width: var(--container);
  margin-inline: auto;
  padding-inline: 1rem;
}

/* Header — fixed overlay; compact pill → full-width bar on scroll */
.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 500;
  width: 100%;
  pointer-events: none;
}

.header-bar {
  box-sizing: border-box;
  pointer-events: auto;
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
  margin-top: calc(var(--header-float-top) * (1 - var(--header-scroll-p)));
  border-radius: calc(var(--header-bar-radius) * (1 - var(--header-scroll-p)));
  border: 1px solid rgba(var(--rgb-border), calc(0.55 * (1 - var(--header-scroll-p)) + 0.35 * var(--header-scroll-p)));
  background: color-mix(in srgb, var(--color-surface) 82%, transparent calc((1 - var(--header-scroll-p)) * 100%));
  backdrop-filter: blur(calc(16px * (1 - var(--header-scroll-p) * 0.35)));
  -webkit-backdrop-filter: blur(calc(16px * (1 - var(--header-scroll-p) * 0.35)));
  box-shadow:
    0 4px 24px rgba(var(--rgb-text), calc(0.06 * (1 - var(--header-scroll-p)))),
    0 8px 32px rgba(var(--rgb-blue), calc(0.06 * var(--header-scroll-p)));
  overflow: visible;
}

.header-bar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--pattern-header);
  pointer-events: none;
  z-index: 0;
  opacity: calc(0.85 + 0.15 * (1 - var(--header-scroll-p)));
  clip-path: inset(0 round calc(var(--header-bar-radius) * (1 - var(--header-scroll-p))));
}

.site-header.is-scrolled .header-bar {
  border-inline-color: transparent;
  border-bottom: 1px solid rgba(var(--rgb-border), 0.92);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: calc(var(--header-inner-gap) + (var(--header-inner-gap-scrolled) - var(--header-inner-gap)) * var(--header-scroll-p));
  width: 100%;
  min-height: calc(var(--header-height) + (var(--header-height-scrolled) - var(--header-height)) * var(--header-scroll-p));
  padding:
    calc(var(--header-pad-y) + (var(--header-pad-y-scrolled) - var(--header-pad-y)) * var(--header-scroll-p))
    calc(var(--header-pad-x-compact) + (var(--header-pad-x) - var(--header-pad-x-compact)) * var(--header-scroll-p));
  margin: 0;
  position: relative;
  z-index: 1;
}

/* Main slides under header — no layout gap / color strip */
@media (min-width: 1024px) {
  .header-bar {
    width: calc(var(--header-bar-width) + (100% - var(--header-bar-width)) * var(--header-scroll-p));
    max-width: 100%;
  }

  .site-header ~ #main-content > :first-child:not(.hero):not(.home-page) {
    padding-top: calc(
      var(--header-content-offset) +
      (var(--header-content-offset-scrolled) - var(--header-content-offset)) * var(--header-scroll-p) +
      var(--page-below-header)
    );
  }
}

@media (max-width: 1023px) {
  .site-header ~ #main-content > :first-child:not(.hero):not(.home-page) {
    padding-top: calc(
      var(--header-content-offset) +
      (var(--header-content-offset-scrolled) - var(--header-content-offset)) * var(--header-scroll-p) +
      var(--page-below-header)
    );
  }
}

.header-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  min-width: 0;
  position: relative;
  z-index: 5;
}

.header-center {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  overflow: visible;
}

.header-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  text-decoration: none;
  min-width: 0;
}

.header-brand-link:hover {
  text-decoration: none;
  opacity: 0.9;
}

.brand-wordmark {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.1;
  white-space: nowrap;
}

html[dir="rtl"] .brand-wordmark {
  font-family: "IRANSans", "Vazirmatn", sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0;
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  line-height: 0;
}

.logo:hover { text-decoration: none; opacity: 0.88; }

.logo-img--header {
  height: 2rem;
  max-width: 2.5rem;
}

.site-header.is-scrolled .logo-img--header {
  height: 1.875rem;
}

.logo-img {
  display: block;
  height: calc(2rem + 0.125rem * var(--header-scroll-p));
  width: auto;
  max-width: calc(9.5rem + 1rem * var(--header-scroll-p));
  object-fit: contain;
  object-position: left center;
}

html[dir="rtl"] .logo-img { object-position: right center; }

.header-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: calc(var(--header-tools-gap) + (var(--header-tools-gap-scrolled) - var(--header-tools-gap)) * var(--header-scroll-p));
  position: relative;
  z-index: 5;
}

.header-tools-desktop {
  display: flex;
  align-items: center;
  gap: calc(var(--header-tools-gap) + (var(--header-tools-gap-scrolled) - var(--header-tools-gap)) * var(--header-scroll-p));
}

/* Search */
.header-search { margin: 0; }

.header-search-field {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0.3rem 0.75rem 0.3rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  cursor: text;
  width: calc(9.5rem + 1rem * var(--header-scroll-p));
}

.header-search-field:focus-within {
  width: calc(11.75rem + 1.5rem * var(--header-scroll-p));
  border-color: rgba(var(--rgb-green), 0.35);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.header-search-icon {
  flex-shrink: 0;
  color: var(--color-muted);
  opacity: 0.85;
}

.header-search-field:focus-within .header-search-icon { color: var(--color-accent); }

.header-search input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  padding: 0;
  font-size: 0.8125rem;
  font-family: inherit;
  color: var(--color-text);
}

.header-search input::placeholder { color: var(--color-muted); }

.header-search input:focus { outline: none; }

.search-dropdown {
  position: fixed;
  top: auto;
  inset-inline-start: var(--header-pad-x);
  inset-inline-end: auto;
  width: min(22rem, calc(100vw - 2 * var(--header-pad-x)));
  max-height: min(60vh, 420px);
  overflow: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--color-shadow-lg);
  z-index: 510;
  padding: 0.75rem;
  pointer-events: auto;
}

.search-dropdown.is-loading {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-suggest-loading {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: 0.2em;
  color: var(--color-muted);
  animation: search-pulse 0.9s ease-in-out infinite alternate;
}

@keyframes search-pulse {
  from { opacity: 0.35; }
  to { opacity: 1; }
}

.search-dropdown:not(:empty) { display: block; }

.search-dropdown[hidden] { display: none !important; }

/* Search suggestions dropdown */
.search-suggest-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.search-suggest-item {
  display: grid;
  gap: 0.15rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  color: inherit;
  transition: background 0.15s;
}

.search-suggest-item:hover,
.search-suggest-item.is-active {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.search-suggest-type {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.search-suggest-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.search-suggest-excerpt {
  font-size: 0.78rem;
  color: var(--color-muted);
  line-height: 1.4;
}

.search-suggest-footer {
  margin: 0.5rem 0 0;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  text-align: center;
}

.search-suggest-footer a { font-weight: 600; }

.search-suggest-empty {
  margin: 0;
  padding: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
}

/* Full search results page — continuous background like FAQ / learning hubs */
.search-page {
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
  background: transparent;
}

#main-content:has(.search-page) {
  --search-soft: color-mix(in srgb, var(--color-accent-soft) 55%, var(--color-bg));
  background:
    radial-gradient(ellipse 68% 48% at 100% 0%, rgba(var(--rgb-blue), 0.09), transparent 55%),
    radial-gradient(ellipse 50% 40% at 0% 8%, rgba(var(--rgb-green), 0.08), transparent 50%),
    linear-gradient(180deg, var(--search-soft) 0%, var(--color-bg) 26%, var(--color-bg) 100%);
}

.search-hero {
  padding: clamp(2rem, 5vw, 3.25rem) 0 clamp(1.5rem, 3vw, 2rem);
  background: transparent;
}

.search-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.5vw, 2.75rem);
  font-weight: 500;
  line-height: 1.12;
  margin: 0 0 0.65rem;
  max-width: 18ch;
}

.search-hero-lead {
  color: var(--color-muted);
  margin: 0 0 1.5rem;
  font-size: 1.05rem;
  max-width: 52ch;
  line-height: 1.55;
}

.search-results-wrap {
  padding-bottom: clamp(1rem, 3vw, 2rem);
}

.search-results-head {
  margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
}

.search-results-meta {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.search-results-meta strong {
  color: var(--color-text);
  font-weight: 600;
}

.search-group { margin-bottom: clamp(2rem, 4vw, 2.75rem); }

.search-group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
}

.search-group-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0;
  color: var(--color-text);
}

.search-group-count {
  flex-shrink: 0;
  min-width: 1.75rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  text-align: center;
}

.search-empty-hint {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.search-page-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-start;
  align-items: stretch;
}

.search-page-field {
  flex: 1 1 280px;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0;
  padding: 0.85rem 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--color-shadow);
}

.search-page-field:focus-within {
  border-color: rgba(var(--rgb-green), 0.4);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.search-page-field input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
}

.search-page-field input:focus { outline: none; }

.search-page-body { padding: 2rem 0 3rem; }

.search-result-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.search-result-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  height: 100%;
  padding: 1.2rem 1.25rem 1.1rem;
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-border) 80%, transparent);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 1px 0 rgba(var(--rgb-text), 0.03);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.search-result-card:hover {
  border-color: rgba(var(--rgb-green), 0.35);
  box-shadow: var(--color-shadow);
  transform: translateY(-2px);
  color: inherit;
}

.search-result-type {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-accent);
}

.search-result-card h3 {
  margin: 0;
  font-size: 1.05rem;
  font-family: var(--font-display);
  line-height: 1.35;
}

.search-result-card p {
  margin: 0;
  flex: 1;
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.search-result-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 0.25rem;
}

.search-empty {
  text-align: center;
  padding: clamp(2rem, 5vw, 3rem) 1rem;
  max-width: 520px;
  margin: 0 auto;
  background: color-mix(in srgb, var(--color-surface) 70%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-border) 75%, transparent);
  border-radius: calc(var(--radius) + 2px);
}

.search-empty-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--color-muted);
  opacity: 0.45;
}

.search-empty h2 { margin: 0 0 0.75rem; font-family: var(--font-display); }

.search-empty p { color: var(--color-muted); margin: 0 0 1.5rem; }

.search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
}

.search-tags-label { font-size: 0.85rem; color: var(--color-muted); }

.search-tag {
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

.search-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

/* Language switcher */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 3px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: rgba(246, 248, 247, 0.65);
}

.lang-btn {
  padding: 0.32rem 0.62rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}

.lang-btn:hover {
  color: var(--color-text);
  text-decoration: none;
}

.lang-btn.is-active {
  background: var(--color-surface);
  color: var(--color-accent);
  box-shadow: 0 1px 8px rgba(var(--rgb-text), 0.08);
}

/* Nav toggle (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  z-index: 210;
  transition: background 0.2s;
}

.nav-toggle:hover { background: var(--color-accent-soft); }

.nav-toggle-bar {
  display: block;
  width: 1.125rem;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s, width 0.3s;
}

body.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

body.nav-open .nav-toggle-bar:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(var(--rgb-text), 0.35);
  z-index: 1;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.35s var(--header-ease);
  pointer-events: none;
}

body.nav-open .nav-backdrop {
  opacity: 1;
  pointer-events: auto;
}

body.nav-open .header-bar {
  z-index: 2;
}

.nav-panel {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  min-width: 0;
  width: auto;
  max-width: 100%;
  height: 100%;
  pointer-events: none;
}

.nav-panel-header,
.nav-panel-footer { display: none; }

/* Desktop navigation */
.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  width: auto;
  max-width: 100%;
  height: 100%;
  pointer-events: none;
}

.main-nav .nav-list {
  pointer-events: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: calc(var(--nav-list-gap) + var(--nav-list-gap-scrolled) * var(--header-scroll-p));
  list-style: none;
  margin: 0;
  padding: calc(0.05rem * (1 - var(--header-scroll-p))) calc(0.25rem * (1 - var(--header-scroll-p)));
  border-radius: calc(999px * (1 - var(--header-scroll-p)));
  background: rgba(246, 248, 247, calc(0.65 * (1 - var(--header-scroll-p))));
  border: 1px solid rgba(var(--rgb-border), calc(0.55 * (1 - var(--header-scroll-p))));
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-link,
.nav-trigger {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  line-height: 1.2;
  min-height: 2rem;
  color: var(--color-muted);
  font-size: calc(var(--nav-link-font) + (var(--nav-link-font-scrolled) - var(--nav-link-font)) * var(--header-scroll-p));
  font-weight: 500;
  letter-spacing: 0.02em;
  padding:
    calc(0.35rem + 0.07rem * var(--header-scroll-p))
    calc(0.65rem + 0.13rem * var(--header-scroll-p));
  border-radius: calc(999px * (1 - var(--header-scroll-p)) + var(--radius-sm) * var(--header-scroll-p));
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-trigger > span {
  display: inline-flex;
  align-items: center;
  line-height: 1.2;
}

.nav-link::after,
.nav-trigger::after {
  content: "";
  position: absolute;
  inset-inline: 0.65rem;
  bottom: 0.15rem;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.is-scrolled .nav-link::after,
.site-header.is-scrolled .nav-trigger::after {
  inset-inline: 0.78rem;
  bottom: 0.2rem;
}

.nav-link:hover,
.nav-trigger:hover,
.nav-item.is-open > .nav-trigger {
  color: var(--color-text);
  background: transparent;
  text-decoration: none;
}

.nav-link:hover::after,
.nav-trigger:hover::after,
.nav-item.is-open > .nav-trigger::after {
  transform: scaleX(1);
}

.nav-chevron {
  display: block;
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  margin-top: 0;
  transition: transform 0.25s ease, opacity 0.2s;
  opacity: 0.45;
}

.nav-item.is-open .nav-chevron {
  transform: rotate(180deg);
  opacity: 0.85;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-start: 0;
  min-width: 13.5rem;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid rgba(var(--rgb-border), 0.9);
  border-radius: 1rem;
  box-shadow: 0 20px 50px rgba(var(--rgb-text), 0.1), 0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  padding: 0.4rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition:
    opacity 0.22s ease,
    transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0.22s;
  z-index: 220;
}

html[dir="rtl"] .nav-dropdown {
  inset-inline-start: auto;
  inset-inline-end: 0;
}

.nav-item.is-open .nav-dropdown,
.nav-item--has-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-dropdown-link {
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--color-text-soft);
  font-size: 0.8125rem;
  border-radius: 0.65rem;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}

.nav-dropdown-link:hover {
  color: var(--color-accent);
  background: var(--color-accent-soft);
  text-decoration: none;
  transform: translateX(2px);
}

.nav-dropdown-item--primary {
  margin-top: 0.35rem;
  padding-top: 0.35rem;
  border-top: 1px solid var(--color-border);
}

.nav-dropdown-link--primary {
  text-align: center;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-brand, var(--color-accent));
  box-shadow: 0 4px 14px color-mix(in srgb, var(--theme-blue) 18%, transparent);
}

.nav-dropdown-link--primary:hover {
  color: #fff;
  background: linear-gradient(
    135deg,
    var(--color-accent-light) 0%,
    var(--theme-teal) 50%,
    var(--theme-blue-light) 100%
  );
  transform: none;
}

html[dir="rtl"] .nav-dropdown-link:hover { transform: translateX(-2px); }

html[dir="rtl"] .nav-dropdown-link--primary:hover { transform: none; }

/* Hero — full viewport width & height */
.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--pattern-hero);
}

.site-header ~ #main-content > .hero:first-child,
.site-header ~ #main-content > .home-page > .hero:first-child {
  padding-top: calc(
    var(--header-content-offset) + 0.75rem +
    (var(--header-content-offset-scrolled) - var(--header-content-offset)) * var(--header-scroll-p)
  );
  padding-bottom: clamp(1.5rem, 4vh, 2.5rem);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--pattern-tunnel), var(--pattern-grid);
  opacity: 0.55;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  width: 100%;
  max-width: 100%;
  padding-inline: var(--header-pad-x);
  flex: 1;
  display: flex;
  align-items: center;
}

.hero-content {
  position: relative;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.6rem);
  font-weight: 400;
  line-height: 1.15;
  margin: 0 0 1rem;
  color: var(--color-text);
}

.hero-headline__line {
  display: block;
}

.hero-headline__line--accent {
  color: var(--color-accent);
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 52ch;
  margin: 0;
}

.hero-cta {
  display: flex;
  gap: 0.85rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: var(--btn-min-height);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-size: var(--btn-font-size);
  font-weight: var(--btn-font-weight);
  line-height: 1.25;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-sm {
  min-height: var(--btn-sm-min-height);
  padding: var(--btn-sm-padding-y) var(--btn-sm-padding-x);
  font-size: var(--btn-sm-font-size);
}

.btn-primary {
  background: var(--gradient-brand, var(--color-accent));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px color-mix(in srgb, var(--theme-blue) 22%, transparent);
}

.btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--color-accent-light) 0%,
    var(--theme-teal) 50%,
    var(--theme-blue-light) 100%
  );
  transform: translateY(-2px);
  text-decoration: none;
  color: #fff;
}

.btn-ghost {
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-surface);
}

.btn-ghost:hover {
  border-color: var(--color-accent-light);
  color: var(--color-accent);
  background: var(--color-surface-hover);
  text-decoration: none;
}

/* Buttons are links — do not inherit global anchor colors */
a.btn,
a.btn:hover,
a.btn:focus-visible {
  text-decoration: none;
}

a.btn-primary,
a.btn-primary:hover,
a.btn-primary:focus-visible {
  color: #fff;
}

a.btn-ghost,
a.btn-ghost:focus-visible {
  color: var(--color-text);
}

a.btn-ghost:hover {
  color: var(--color-accent);
}

/* Stats & pillars */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  padding: 2.5rem 0;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--color-shadow);
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-display);
}

.stat-label { font-size: 0.85rem; color: var(--color-muted); }

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  padding: 1rem 0 3.5rem;
}

.pillar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--color-shadow);
  transition: box-shadow 0.25s, transform 0.25s;
}

.pillar:hover {
  box-shadow: var(--color-shadow-lg);
  transform: translateY(-3px);
}

.pillar h2 {
  font-family: var(--font-display);
  font-weight: 400;
  margin-top: 0;
  font-size: 1.5rem;
}

.cta-band {
  background: color-mix(in srgb, var(--color-surface) 45%, var(--color-bg));
  border-block: 1px solid var(--color-border);
  padding: 3.5rem 0;
  text-align: center;
}

.cta-band h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.75rem;
}

/* Cards & pages */
.page-header {
  padding-bottom: 0.5rem;
}

.page-header h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 2.4rem;
  margin: 0 0 0.5rem;
}

.page-header p {
  color: var(--color-muted);
  margin: 0;
  font-size: 1.05rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem 0 3.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--color-shadow);
  transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
}

.card:hover {
  border-color: rgba(var(--rgb-green), 0.25);
  transform: translateY(-4px);
  box-shadow: var(--color-shadow-lg);
}

.card-body { padding: 1.35rem; }

.badge {
  display: inline-block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  font-weight: 600;
}

.detail-page { padding: 1.5rem 0 4rem; }

.detail-header { margin-bottom: 2rem; }

.detail-header h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 2.6rem;
  line-height: 1.15;
}

.lead { font-size: 1.12rem; color: var(--color-muted); }

.prose {
  max-width: 72ch;
  color: var(--color-text-soft);
  line-height: 1.75;
}

.detail-hero {
  border-radius: var(--radius);
  margin: 1.5rem 0;
  box-shadow: var(--color-shadow-lg);
}

/* Footer — see footer.css */

.empty-state { color: var(--color-muted); padding: 2rem 0; }

.meta { font-size: 0.85rem; color: var(--color-muted); margin-top: 0.5rem; }

/* Compact site-wide pagination */
.rtt-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 1.25rem 0 2.5rem;
  font-size: 0.8125rem;
  line-height: 1;
}

.rtt-pagination__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  min-height: 2rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text-soft);
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

a.rtt-pagination__btn:hover {
  border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 6%, var(--color-surface));
  text-decoration: none;
}

.rtt-pagination__btn.is-disabled {
  opacity: 0.38;
  pointer-events: none;
}

.rtt-pagination__icon {
  font-size: 1.05rem;
  line-height: 1;
  font-weight: 600;
}

.rtt-pagination__status {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  min-width: 3.25rem;
  justify-content: center;
  padding: 0.35rem 0.5rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.rtt-pagination__current {
  color: var(--color-text);
  font-weight: 600;
}

.rtt-pagination__sep {
  opacity: 0.55;
}

@media (max-width: 480px) {
  .rtt-pagination__label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .rtt-pagination__btn {
    min-width: 2rem;
    padding-inline: 0.5rem;
  }
}

.detail-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.team-grid .team-card .role {
  color: var(--color-accent);
  font-weight: 500;
  margin: 0;
}

.team-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.25rem;
  border: 3px solid var(--color-accent-soft);
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.65rem;
  box-shadow: var(--color-shadow);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
}

/* RTL — Persian display + body fonts */
html[dir="rtl"] {
  --font-display: "IRANSans", "Vazirmatn", Tahoma, sans-serif;
  --font-body: "Vazirmatn", "Vazir", Tahoma, sans-serif;
  line-height: 1.75;
}

html[dir="rtl"] .prose,
html[dir="rtl"] .hero-lead,
html[dir="rtl"] .lead,
html[dir="rtl"] p {
  line-height: 1.85;
  letter-spacing: 0.01em;
}

html[dir="rtl"] h1,
html[dir="rtl"] h2,
html[dir="rtl"] h3 {
  letter-spacing: 0;
  font-weight: 600;
}

html[dir="rtl"] .hero-headline {
  font-weight: 500;
  font-size: clamp(1.9rem, 4.5vw, 3.1rem);
  line-height: 1.45;
}

html[dir="rtl"] .hero-headline__line {
  font-size: 1em;
  font-weight: inherit;
}

html[dir="rtl"] .hero-headline__line--accent {
  font-size: 1em;
  font-weight: inherit;
  color: var(--color-accent);
}

html[dir="rtl"] .eyebrow {
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.6;
}

html[dir="rtl"] .hero-lead {
  max-width: 42ch;
  font-size: 1.05rem;
}

html[dir="rtl"] .site-header,
html[dir="rtl"] .main-nav,
html[dir="rtl"] .nav-panel {
  font-family: var(--font-display);
}

html[dir="ltr"] .site-header,
html[dir="ltr"] .main-nav,
html[dir="ltr"] .nav-panel {
  font-family: var(--font-display);
}

h1, h2, h3, h4, h5, h6,
.eyebrow,
.site-footer__col-title,
.faq-item summary,
.nav-panel-title {
  font-family: var(--font-display);
}

html[dir="rtl"] .hero-cta,
html[dir="rtl"] .detail-actions,
html[dir="rtl"] .rtt-pagination {
  flex-direction: row-reverse;
}

/* Tablet & mobile — always full-width bar (no floating pill) */
@media (max-width: 1023px) {
  :root {
    --header-height: 3.25rem;
    --header-height-scrolled: 3.5rem;
    --header-float-top: 0;
    --header-bar-margin-x: 0;
    --header-bar-radius: 0;
    --header-content-offset: calc(var(--header-height) + 0.5rem);
    --header-content-offset-scrolled: calc(var(--header-height-scrolled) + 0.5rem);
  }

  .header-bar {
    width: 100%;
    max-width: 100%;
    margin-top: 0;
    border-radius: 0;
    border-inline-color: transparent;
  }

  .header-inner {
    grid-template-columns: auto 1fr auto;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 5;
  }

  .header-tools-desktop { display: none; }

  body.nav-open .header-bar {
    z-index: 2;
  }

  .header-center {
    grid-column: 2;
    min-width: 0;
    min-height: 0;
  }

  .nav-panel {
    position: fixed;
    top: 0;
    inset-inline-end: 0;
    width: min(340px, 92vw);
    height: 100dvh;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    background: rgba(255, 255, 255, 0.98);
    border-inline-start: 1px solid var(--color-border);
    box-shadow: -16px 0 48px rgba(var(--rgb-text), 0.12);
    z-index: 10;
    transform: translateX(100%);
    visibility: hidden;
    transition:
      transform 0.45s var(--header-ease),
      visibility 0.45s var(--header-ease);
    overflow-y: auto;
    padding: 0;
    pointer-events: auto;
    max-width: none;
  }

  .nav-panel .main-nav,
  .nav-panel .nav-list {
    pointer-events: auto;
  }

  html[dir="rtl"] .nav-panel {
    inset-inline-end: auto;
    inset-inline-start: 0;
    transform: translateX(-100%);
    box-shadow: 16px 0 48px rgba(var(--rgb-text), 0.12);
  }

  body.nav-open .nav-panel {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--header-pad-x);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
  }

  .nav-panel-title {
    font-weight: 600;
    font-size: 0.9375rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-muted);
  }

  .nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    background: var(--color-bg);
    border-radius: 999px;
    cursor: pointer;
    color: var(--color-text);
    transition: background 0.2s;
  }

  .nav-close:hover { background: var(--color-accent-soft); }

  .main-nav {
    flex: 1;
    justify-content: flex-start;
    overflow-y: auto;
    padding: 0.75rem var(--header-pad-x);
    width: 100%;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    width: 100%;
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
  }

  .nav-item {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    border-bottom: none;
  }

  .nav-link,
  .nav-trigger {
    width: 100%;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    font-size: 0.9375rem;
    border-radius: var(--radius-sm);
  }

  .nav-link::after,
  .nav-trigger::after { display: none; }

  .nav-link:hover,
  .nav-trigger:hover,
  .nav-item.is-open > .nav-trigger {
    background: var(--color-accent-soft);
    color: var(--color-accent);
  }

  /* Accordion: submenu stacks under trigger (not beside it) */
  .nav-dropdown {
    position: static;
    inset-inline: auto;
    top: auto;
    width: 100%;
    min-width: 0;
    z-index: auto;
    transform: none !important;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0;
    margin: 0;
    max-height: none;
    display: grid;
    grid-template-rows: 0fr;
    overflow: hidden;
    transition: grid-template-rows 0.35s ease;
    background: var(--color-bg);
    backdrop-filter: none;
    pointer-events: none;
  }

  .nav-dropdown-list {
    min-height: 0;
    overflow: hidden;
  }

  .nav-item.is-open .nav-dropdown {
    grid-template-rows: 1fr;
    padding-block: 0.15rem 0.35rem;
    padding-inline: 0.35rem;
    pointer-events: auto;
  }

  .nav-item--has-dropdown:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: none !important;
    grid-template-rows: 0fr;
    padding: 0;
    pointer-events: none;
  }

  .nav-item--has-dropdown.is-open:hover .nav-dropdown {
    grid-template-rows: 1fr;
    pointer-events: auto;
  }

  .nav-dropdown-link {
    padding: 0.65rem 1rem 0.65rem 1.5rem;
    font-size: 0.875rem;
    transform: none;
  }

  .nav-dropdown-link:hover { transform: none; }

  html[dir="rtl"] .nav-dropdown-link {
    padding: 0.65rem 1.5rem 0.65rem 1rem;
  }

  .nav-panel-footer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.25rem var(--header-pad-x);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
  }

  .search-form--mobile .header-search-field {
    width: 100%;
  }

  .search-form--mobile .header-search-field:focus-within { width: 100%; }

  body.nav-open { overflow: hidden; }
}

@media (min-width: 1024px) {
  .header-inner {
    align-items: center;
  }

  .header-center {
    grid-column: 2;
    justify-self: center;
  }

  .nav-panel {
    position: relative;
    top: auto;
    inset-inline: auto;
    width: auto;
    max-width: 100%;
    height: auto;
    pointer-events: none;
    z-index: 1;
  }

  .header-brand {
    grid-column: 1;
    align-self: center;
  }

  .header-tools {
    grid-column: 3;
    align-self: center;
  }

  .nav-dropdown-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-dropdown-link {
    display: flex;
    align-items: center;
    min-height: 2.25rem;
  }
}

@media (max-width: 768px) {
  .logo-img { height: 2.125rem; }

  .site-header.is-scrolled .logo-img { height: 1.875rem; }
}

/* ——— Courses & Learning ——— */
.course-hero {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  padding: 0 0 2.5rem;
  align-items: start;
}

.course-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.75rem; }

.badge-free { background: #e3f2fd; color: #1565c0; }
.badge-featured { background: #fff3e0; color: #e65100; }

.course-meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.course-purchase-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--color-shadow-lg);
  overflow: hidden;
  position: sticky;
  top: 90px;
}

.course-purchase-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }

.course-purchase-body { padding: 1.25rem; }

.course-price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 1rem;
  font-family: var(--font-serif);
}

.course-price--free { color: #1565c0; }

.btn-block { display: flex; width: 100%; justify-content: center; margin-bottom: 0.5rem; }

.course-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2.5rem;
  padding-bottom: 4rem;
}

.course-section { margin-bottom: 2.5rem; }

.course-section h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.curriculum-list { list-style: none; padding: 0; margin: 0; }

.curriculum-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.curriculum-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.instructor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--color-shadow);
  position: sticky;
  top: 90px;
}

.instructor-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
}

.instructor-role { color: var(--color-accent); font-weight: 500; }

.course-card .card-image-link { display: block; }

.card-footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  gap: 0.5rem;
}

.course-card-price { font-weight: 600; color: var(--color-accent); }

.filter-bar {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding-bottom: 1rem;
}

.filter-bar select {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

/* Checkout */
.checkout-page {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(2.5rem, 6vw, 4rem);
}

.checkout-page__inner {
  width: 100%;
  max-width: min(1080px, 100%);
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 1.5rem);
  box-sizing: border-box;
}

.checkout-page__head {
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
  max-width: 42rem;
}

.checkout-page__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-blue, var(--theme-blue));
}

.checkout-page__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-text);
}

.checkout-page__lead {
  margin: 0;
  font-size: 1rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.28fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}

.checkout-layout > * {
  min-width: 0;
}

.checkout-order__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: clamp(1.15rem, 2.5vw, 1.5rem);
  box-shadow: var(--color-shadow);
}

.checkout-order__heading {
  margin: 0 0 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.checkout-order__course {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.checkout-order__thumb {
  flex-shrink: 0;
  width: 7.5rem;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.checkout-order__thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  background: var(--color-accent-soft);
}

.checkout-order__course-text {
  min-width: 0;
  flex: 1;
}

.checkout-order__course-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
  overflow-wrap: anywhere;
}

.checkout-order__course-summary {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}

.checkout-order__lines {
  margin: 0 0 1rem;
  padding: 0;
}

.checkout-order__line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.65rem;
  font-size: 0.9rem;
}

.checkout-order__line dt {
  margin: 0;
  color: var(--color-muted);
  font-weight: 500;
}

.checkout-order__line dd {
  margin: 0;
  text-align: end;
  color: var(--color-text);
  font-weight: 500;
  overflow-wrap: anywhere;
}

.checkout-order__line--total {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--color-border);
}

.checkout-order__line--total dt {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.checkout-order__price {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-accent);
}

.checkout-order__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--color-muted);
}

.checkout-order__badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--theme-blue, var(--color-accent-blue));
  background: var(--color-accent-blue-soft, var(--color-accent-soft));
}

.checkout-order__back {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.checkout-order__back:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.checkout-billing__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  box-shadow: var(--color-shadow);
  box-sizing: border-box;
}

.checkout-billing__head {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.checkout-billing__title {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
}

.checkout-billing__meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.checkout-fieldset {
  margin: 0 0 1.5rem;
  padding: 0;
  border: none;
  min-width: 0;
}

.checkout-fieldset__legend {
  display: block;
  width: 100%;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-accent-soft);
}

.checkout-form-grid {
  display: grid;
  gap: 0 1rem;
  min-width: 0;
}

.checkout-form-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.checkout-form-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.checkout-form .form-field {
  margin-bottom: 1rem;
  min-width: 0;
}

.checkout-form .form-field label {
  color: var(--color-text-soft);
}

.checkout-form .form-input,
.checkout-form .form-field input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]),
.checkout-form .form-field select,
.checkout-form .form-field textarea {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.checkout-form .form-field textarea {
  resize: vertical;
  min-height: 4.5rem;
  max-height: 12rem;
}

.checkout-actions {
  margin-top: 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.checkout-actions__submit {
  width: 100%;
}

.checkout-actions__secure {
  margin: 0.85rem 0 0;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--color-muted);
}

.checkout-saved__summary {
  margin-bottom: 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--theme-green) 22%, var(--color-border));
  background: color-mix(in srgb, var(--theme-green) 5%, var(--color-surface));
}

.checkout-saved__summary-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.checkout-saved__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.checkout-saved__badge {
  flex-shrink: 0;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--theme-green-dark, var(--theme-green));
  background: color-mix(in srgb, var(--theme-green) 12%, var(--color-surface));
  border: 1px solid color-mix(in srgb, var(--theme-green) 25%, transparent);
}

.checkout-saved__lines {
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.checkout-saved__line {
  display: grid;
  grid-template-columns: minmax(0, 5.5rem) minmax(0, 1fr);
  gap: 0.65rem;
  font-size: 0.9rem;
  line-height: 1.45;
}

.checkout-saved__line dt {
  margin: 0;
  color: var(--color-muted);
  font-weight: 500;
}

.checkout-saved__line dd {
  margin: 0;
  color: var(--color-text);
  font-weight: 500;
  overflow-wrap: anywhere;
}

.checkout-saved__line--address dd {
  font-weight: 400;
}

.checkout-form--quick .checkout-actions {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.checkout-saved__edit-link {
  margin: 1rem 0 0;
  text-align: center;
}

.checkout-saved__edit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-accent-blue, var(--theme-blue));
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.checkout-saved__edit-btn:hover {
  border-color: color-mix(in srgb, var(--theme-blue) 35%, var(--color-border));
  background: color-mix(in srgb, var(--theme-blue) 6%, var(--color-bg));
  text-decoration: none;
}

@media (max-width: 520px) {
  .checkout-saved__line {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

@media (min-width: 901px) {
  .checkout-order {
    position: sticky;
    top: calc(var(--header-content-offset-scrolled) + 1rem);
  }
}

html[dir="rtl"] .checkout-order__back {
  display: inline-flex;
  flex-direction: row-reverse;
}

html[dir="rtl"] .checkout-order__line dd {
  text-align: start;
}

.form-input,
.form-field input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]),
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-field input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]):focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form-field.has-error .form-input,
.form-field.has-error input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]),
.form-field.has-error select,
.form-field.has-error textarea {
  border-color: #c62828;
}

.form-field { margin-bottom: 1rem; }

.form-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.field-error { color: #c62828; font-size: 0.8rem; }

.payment-result {
  text-align: center;
  padding: 4rem 1rem;
  max-width: 480px;
  margin: 0 auto;
}

.payment-result-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 2rem;
  line-height: 64px;
  margin: 0 auto 1rem;
}

.learn-modules { list-style: none; padding: 0; }

.learn-module {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
}

.learn-module.is-done { border-color: var(--color-accent-light); }

.learn-check {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.learn-module.is-done .learn-check {
  background: var(--color-accent);
  color: #fff;
}

/* Auth — breathing room below floating header */
#main-content:has(.auth-page) {
  display: flex;
  flex-direction: column;
  padding-top: var(--header-content-offset-scrolled);
}

.site-header ~ #main-content > .auth-page:first-child {
  padding-top: clamp(2.5rem, 10vh, 5rem);
}

.auth-page {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-bottom: clamp(2rem, 5vh, 4rem);
  box-sizing: border-box;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--color-shadow-lg);
}

.auth-card h1 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.auth-form { margin-top: 1.25rem; }

.auth-footer {
  margin: 1.5rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.auth-footer a { font-weight: 500; }

.form-errors {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(198, 40, 40, 0.08);
  border: 1px solid rgba(198, 40, 40, 0.25);
  color: #c62828;
  font-size: 0.875rem;
}

@media (max-width: 900px) {
  .course-hero,
  .course-layout,
  .checkout-layout {
    grid-template-columns: 1fr;
  }

  .checkout-form-grid--2,
  .checkout-form-grid--3 {
    grid-template-columns: 1fr;
  }

  .checkout-order {
    position: static;
  }
  .course-purchase-card,
  .instructor-card {
    position: static;
  }
}