/* Optic — AI Eyewear Stylist Theme */
/* Design: Warby Parker editorial meets modern AI product */

:root {
  --bg: #FDFAF4;
  --bg-alt: #F5EFE3;
  --fg: #1A1714;
  --fg-muted: #6B6259;
  --accent: #C4922A;
  --accent-light: #F0D98A;
  --accent-dark: #8A6020;
  --border: #E5DDD0;
  --card-bg: #FFFFFF;
  --card-shadow: 0 2px 16px rgba(26, 23, 20, 0.08);
  --font-display: 'Sora', sans-serif;
  --font-body: 'Nunito Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  position: sticky;
  top: 0;
  background: rgba(253, 250, 244, 0.92);
  backdrop-filter: blur(8px);
  z-index: 10;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--fg);
}

.nav-tagline {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  font-weight: 400;
}

/* HERO */
.hero {
  padding: 80px 48px 60px;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-lede {
  font-size: 1.125rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 440px;
  font-weight: 300;
}

/* Hero card */
.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px;
  width: 320px;
  box-shadow: var(--card-shadow);
}

.card-label {
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 20px;
}

.card-shape {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.card-shape svg {
  width: 80px;
  height: 80px;
}

.card-result {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 12px;
  text-align: center;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
  justify-content: center;
}

.card-tags span {
  font-size: 0.7rem;
  background: var(--bg-alt);
  color: var(--fg-muted);
  padding: 3px 10px;
  border-radius: 100px;
}

.card-match {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}

.match-label {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 6px;
}

.match-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 4px;
}

.match-reason {
  font-size: 0.75rem;
  color: var(--fg-muted);
  font-style: italic;
}

/* Hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: 1200px;
  margin: 60px auto 0;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* SHOWCASE */
.showcase {
  padding: 100px 48px;
  background: var(--bg-alt);
}

.showcase-header {
  max-width: 1200px;
  margin: 0 auto 64px;
}

.section-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.section-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  line-height: 1.2;
  max-width: 480px;
}

.showcase-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.step {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--accent-light);
  line-height: 1;
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--fg);
  line-height: 1.3;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.7;
  font-weight: 300;
}

.step-detail {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* PHILOSOPHY */
.philosophy {
  padding: 100px 48px;
}

.philosophy-inner {
  max-width: 800px;
  margin: 0 auto;
}

.philosophy-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 32px;
}

.philosophy-quote {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  font-weight: 400;
  line-height: 1.5;
  color: var(--fg);
  font-style: italic;
  border-left: 3px solid var(--accent);
  padding-left: 28px;
  margin-bottom: 32px;
}

.philosophy-body {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 48px;
  font-weight: 300;
}

.philosophy-mission {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mission-item {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--fg);
}

.mission-icon {
  color: var(--accent);
  font-size: 0.9rem;
}

/* CLOSING */
.closing {
  padding: 100px 48px;
  background: var(--fg);
  color: var(--bg);
}

.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-light);
  font-weight: 600;
  margin-bottom: 24px;
}

.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--bg);
  margin-bottom: 28px;
}

.closing-body {
  font-size: 1.05rem;
  color: rgba(253, 250, 244, 0.7);
  line-height: 1.8;
  font-weight: 300;
}

/* FOOTER */
.footer {
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* ============================================================
   ANALYZER APP
   ============================================================ */

/* CTA button on landing */
.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  margin-top: 32px;
  transition: background 0.15s;
}
.btn-cta:hover { background: var(--accent-dark); }

/* Nav CTA */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 9px 18px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}
.nav-cta:hover { background: var(--accent-dark); }

/* Analyzer app wrapper */
.analyzer-section {
  padding: 80px 48px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.analyzer-app {
  max-width: 680px;
  margin: 0 auto;
}

/* Step layout */
.app-step {
  animation: fadeUp 0.3s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.app-header {
  margin-bottom: 36px;
}

.app-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
}

.app-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 10px;
}

.app-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  font-weight: 300;
  line-height: 1.6;
  max-width: 480px;
}

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 24px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--bg-alt);
}

.upload-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.upload-icon { margin-bottom: 4px; }

.upload-label {
  font-weight: 600;
  color: var(--fg);
  font-size: 1rem;
}

.upload-hint {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.upload-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.preview-image {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--accent);
}

.preview-change {
  font-size: 0.8rem;
  color: var(--fg-muted);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
}
.preview-change:hover { color: var(--accent); }

/* Buttons */
.btn-primary {
  width: 100%;
  padding: 16px 24px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  margin-top: 4px;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-dark); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  padding: 12px 24px;
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* Loading */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.loading-ring {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Errors */
.form-error {
  background: #FFF1F1;
  border: 1px solid #FFD0D0;
  color: #C0392B;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
  margin-bottom: 12px;
}

/* Face result banner */
.face-result-banner {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.face-shape-badge {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}

.face-shape-icon svg {
  width: 56px;
  height: 56px;
}

.face-shape-label {
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.face-shape-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
}

.face-reasoning {
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.6;
  font-style: italic;
}

/* Quiz form */
.quiz-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.quiz-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quiz-label {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--fg);
}

.optional {
  font-weight: 400;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.quiz-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.quiz-option {
  padding: 9px 18px;
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
}
.quiz-option:hover { border-color: var(--accent); color: var(--accent); }
.quiz-option.selected {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.quiz-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--fg);
  background: var(--card-bg);
  resize: vertical;
  transition: border-color 0.12s;
}
.quiz-textarea:focus { outline: none; border-color: var(--accent); }

/* Results */
.results-profile {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.profile-chip {
  padding: 6px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--fg-muted);
}

.recommendations-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

.rec-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  display: grid;
  grid-template-columns: 40px 1fr 72px;
  gap: 20px;
  align-items: start;
  box-shadow: var(--card-shadow);
}

.rec-card--top {
  border-color: var(--accent);
  box-shadow: 0 4px 24px rgba(196, 146, 42, 0.15);
}

.rec-badge {
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--accent);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 4px 10px;
  border-radius: 100px;
}

.rec-rank {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
  padding-top: 2px;
}

.rec-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rec-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.rec-meta {
  font-size: 0.78rem;
  color: var(--fg-muted);
  text-transform: capitalize;
}

.rec-desc {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
  font-weight: 300;
}

.rec-why {
  font-size: 0.82rem;
  color: var(--fg);
  line-height: 1.5;
  background: var(--bg-alt);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rec-why-label {
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.rec-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding-top: 4px;
}

.score-value {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
}

.score-label {
  font-size: 0.65rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.results-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.results-note {
  font-size: 0.8rem;
  color: var(--fg-muted);
  max-width: 480px;
  line-height: 1.6;
}

/* Section header for analyzer */
.analyzer-section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .nav { padding: 20px 24px; }
  .hero { padding: 60px 24px 40px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .hero-lede { max-width: 100%; }
  .hero-stats { gap: 24px; }
  .showcase { padding: 60px 24px; }
  .showcase-steps { grid-template-columns: 1fr; gap: 40px; }
  .philosophy { padding: 60px 24px; }
  .closing { padding: 60px 24px; }
  .footer { padding: 32px 24px; flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 2.4rem; }
  .section-headline { font-size: 1.6rem; }
  .closing-headline { font-size: 1.8rem; }
}

@media (max-width: 900px) {
  .analyzer-section { padding: 60px 24px; }
  .rec-card { grid-template-columns: 32px 1fr; }
  .rec-score { display: none; }
}

@media (max-width: 480px) {
  .quiz-options { gap: 8px; }
  .quiz-option { padding: 8px 14px; font-size: 0.82rem; }
  .rec-card { padding: 20px 16px; }
}