/* =========================================================
   PROMPT STUDIO — LANDING PAGE
   Prometheus Education Systems
   ========================================================= */

/* Design tokens */
:root {
  --navy: #1A2F4F;
  --navy-soft: #243a5d;
  --navy-deep: #0f1e36;
  --gold: #C9A961;
  --gold-soft: #d4ba7c;
  --cream: #f5f3ee;
  --paper: #fafaf8;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-muted: #7a7a7a;
  --line: #e5e0d6;
  --line-soft: #efeae0;

  --font-display: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-arabic: 'Noto Sans Arabic', system-ui, sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --radius-sm: 4px;
  --radius: 6px;
  --radius-lg: 10px;
}

/* Apple-device compatibility rules */
html {
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Language toggle state */
.lang-en { display: inline; }
.lang-ar-content { display: none; }
.lang-es-content { display: none; }
body.lang-ar .lang-en { display: none; }
body.lang-ar .lang-ar-content {
  display: inline;
  font-family: var(--font-arabic);
}
body.lang-ar {
  direction: rtl;
}
body.lang-es .lang-en { display: none; }
body.lang-es .lang-es-content { display: inline; }

a {
  color: var(--navy);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

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

/* =========================================================
   LAYOUT
   ========================================================= */

.container {
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

@media (min-width: 720px) {
  .container {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }
}

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

.section-light {
  background: var(--cream);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-header {
  max-width: 720px;
  margin-bottom: var(--space-5);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin: 0 0 var(--space-3) 0;
}

.section-lede {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  max-width: 640px;
}

/* =========================================================
   HEADER
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
  transform: translateZ(0); /* iOS rendering hint */
}

.header-inner {
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--space-2) var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .header-inner {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--navy);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }

.brand-logo {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.header-nav > * + * { margin-left: 8px; }
@supports (gap: 8px) {
  .header-nav { gap: var(--space-2); }
  .header-nav > * + * { margin-left: 0; }
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--navy);
  padding: 8px 12px;
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.lang-btn {
  background: transparent;
  border: 0;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-muted);
  cursor: pointer;
  transition: background 150ms, color 150ms;
}

.lang-btn.active {
  background: var(--navy);
  color: var(--cream);
}

.lang-btn:hover:not(.active) {
  background: var(--line-soft);
}

/* Hide secondary nav on small screens, keep brand + CTAs */
@media (max-width: 640px) {
  .nav-link { display: none; }
  .brand-sub { display: none; }
}

/* =========================================================
   BUTTONS
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 150ms, color 150ms, border-color 150ms;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-lg { padding: 14px 22px; font-size: 15px; }

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

.btn-accent {
  background: var(--navy);
  color: var(--cream);
  border-color: var(--navy);
}
.btn-accent:hover { background: var(--navy-deep); border-color: var(--navy-deep); }

.btn-ghost {
  background: transparent;
  color: var(--navy);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--cream); border-color: var(--navy); }

.btn .mono {
  font-family: var(--font-mono);
  font-weight: 400;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.btn-row > * + * { margin-left: var(--space-2); }
@supports (gap: var(--space-2)) {
  .btn-row { gap: var(--space-2); }
  .btn-row > * + * { margin-left: 0; }
}

/* =========================================================
   HERO
   ========================================================= */

.hero {
  background: var(--paper);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin: 0 0 var(--space-4) 0;
  max-width: 900px;
}

.hero-lede {
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 720px;
  margin: 0;
}

.hero-meta {
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
}

/* =========================================================
   GRIDS
   ========================================================= */

.grid {
  display: grid;
  gap: var(--space-3);
}

.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 980px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* =========================================================
   STEP CARDS (How it works)
   ========================================================= */

.step-card {
  padding: var(--space-3);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: var(--space-2);
}

.step-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--navy);
  margin: 0 0 var(--space-2) 0;
  letter-spacing: -0.01em;
}

.step-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

/* =========================================================
   SECTOR CARDS
   ========================================================= */

.sector-card {
  padding: var(--space-4);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  position: relative;
}

.sector-num {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-muted);
  letter-spacing: 0.05em;
}

body.lang-ar .sector-num {
  right: auto;
  left: var(--space-3);
}

.sector-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--navy);
  margin: 0 0 var(--space-2) 0;
  letter-spacing: -0.01em;
}

.sector-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

/* =========================================================
   PRICING / TIERS
   ========================================================= */

.tier-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

@media (min-width: 720px) {
  .tier-row { grid-template-columns: 1fr 1fr; }
}

.tier-card {
  padding: var(--space-4);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.tier-featured {
  border: 2px solid var(--navy);
  background: var(--paper);
}

.tier-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin-bottom: var(--space-1);
}

.tier-card.tier-featured .tier-label {
  color: var(--gold);
}

.tier-price {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.tier-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-4) 0;
}

.tier-list li {
  position: relative;
  padding-left: 22px;
  padding-bottom: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-soft);
}
body.lang-ar .tier-list li {
  padding-left: 0;
  padding-right: 22px;
}

.tier-list li::before {
  content: "→";
  position: absolute;
  top: 0;
  left: 0;
  color: var(--gold);
  font-family: var(--font-mono);
}
body.lang-ar .tier-list li::before {
  left: auto;
  right: 0;
  content: "←";
}

/* Credit pack tiles */

.packs {
  margin-top: var(--space-5);
}

.packs-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.packs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

@media (min-width: 720px) {
  .packs-grid { grid-template-columns: repeat(4, 1fr); }
}

.pack {
  position: relative;
  padding: var(--space-3) var(--space-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pack-popular {
  border-color: var(--gold);
  background: var(--paper);
}

.pack-credits {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
}

.pack-price {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.pack-per {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
}

.pack-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gold);
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
}

/* Callout */
.callout {
  margin-top: var(--space-5);
  padding: var(--space-3);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
}
body.lang-ar .callout {
  border-left: 1px solid var(--line);
  border-right: 3px solid var(--gold);
}

.callout-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.callout a {
  color: var(--navy);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* =========================================================
   FINAL CTA
   ========================================================= */

.section-final {
  background: var(--navy);
  color: var(--cream);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
  text-align: center;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--cream);
  margin: 0 0 var(--space-3) 0;
}

.cta-lede {
  font-size: 18px;
  line-height: 1.55;
  color: rgba(245, 243, 238, 0.8);
  max-width: 640px;
  margin: 0 auto;
}

.section-final .btn-row {
  justify-content: center;
}

.section-final .btn-accent {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}
.section-final .btn-accent:hover {
  background: var(--gold-soft);
  border-color: var(--gold-soft);
}

.section-final .btn-ghost {
  color: var(--cream);
  border-color: rgba(245, 243, 238, 0.25);
}
.section-final .btn-ghost:hover {
  background: rgba(245, 243, 238, 0.06);
  border-color: rgba(245, 243, 238, 0.5);
}

/* =========================================================
   FOOTER
   ========================================================= */

.site-footer {
  background: var(--navy-deep);
  color: var(--cream);
  padding-top: var(--space-5);
  padding-bottom: var(--space-4);
  padding-bottom: max(var(--space-4), env(safe-area-inset-bottom, 0));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-logo {
  width: 32px;
  height: 32px;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--cream);
}

.footer-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(245, 243, 238, 0.6);
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col a {
  color: rgba(245, 243, 238, 0.75);
  font-size: 14px;
  text-decoration: none;
}
.footer-col a:hover {
  color: var(--cream);
  text-decoration: underline;
}

.footer-base {
  padding-top: var(--space-3);
  border-top: 1px solid rgba(245, 243, 238, 0.1);
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(245, 243, 238, 0.5);
  text-align: center;
}