/* ===================================================================
   InfiSnap Official Web Design System — Fold Aesthetic
   Domain: unfoldloop.com
   =================================================================== */

:root {
  --bg-canvas: #F7F3EB;
  --bg-surface: #FFFCF6;
  --bg-surface-elevated: #FFFFFF;
  --text-primary: #292723;
  --text-secondary: #6B625A;
  --text-muted: #8E857C;
  --brand-primary: #AD4932;
  --brand-primary-hover: #963D28;
  --brand-light: #F3E0D6;
  --brand-light-border: #E8D0C3;
  --border-subtle: #E8E2D5;
  --border-strong: #D5CEBF;
  --accent-amber: #D9822B;
  --accent-amber-light: #FEF7ED;
  --shadow-sm: 0 2px 8px rgba(41, 39, 35, 0.04);
  --shadow-md: 0 8px 24px rgba(41, 39, 35, 0.07);
  --shadow-lg: 0 20px 48px rgba(41, 39, 35, 0.11);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --font-serif: "Playfair Display", "Songti SC", "Noto Serif CJK SC", "STSong", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
  --container-max: 1140px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-canvas: #1B1917;
    --bg-surface: #262320;
    --bg-surface-elevated: #302C28;
    --text-primary: #F5EEE3;
    --text-secondary: #C1B5AA;
    --text-muted: #8A8177;
    --brand-primary: #D88A6C;
    --brand-primary-hover: #E49A7D;
    --brand-light: #3D2C26;
    --brand-light-border: #573E35;
    --border-subtle: #36322D;
    --border-strong: #4D4740;
    --accent-amber: #E29547;
    --accent-amber-light: #2E2419;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(247, 243, 235, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  .site-nav {
    background-color: rgba(27, 25, 23, 0.85);
  }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  object-fit: cover;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-family: var(--font-serif);
}

.brand-by {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  line-height: 1;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-link:hover, .nav-link.active {
  color: var(--brand-primary);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--brand-primary);
  color: #FFFFFF !important;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(173, 73, 50, 0.25);
  transition: transform 0.15s ease, background-color 0.2s ease;
}

.nav-cta-btn:hover {
  background-color: var(--brand-primary-hover);
  transform: translateY(-1px);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

/* Hero Section */
.hero-section {
  padding: 72px 0 64px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  max-width: 620px;
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--brand-light);
  border: 1px solid var(--brand-light-border);
  color: var(--brand-primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

/* App Store Badge Style */
.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: #000000;
  color: #FFFFFF !important;
  padding: 10px 22px;
  border-radius: 12px;
  transition: transform 0.15s ease, opacity 0.2s ease;
  box-shadow: var(--shadow-md);
}

.app-store-btn:hover {
  transform: translateY(-2px);
  opacity: 0.94;
}

.app-store-btn svg {
  width: 26px;
  height: 26px;
  fill: #FFFFFF;
}

.app-store-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.app-store-sub {
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  opacity: 0.8;
  line-height: 1;
}

.app-store-main {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 0.98rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}

/* Value Props Pill Row */
.value-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.value-badge-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.value-badge-item svg {
  width: 16px;
  height: 16px;
  color: var(--brand-primary);
}

/* Phone Mockup */
.mockup-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-device {
  width: 320px;
  max-width: 100%;
  border-radius: 46px;
  padding: 12px;
  background: #201E1B;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
  position: relative;
}

.phone-screen {
  border-radius: 36px;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-canvas);
  aspect-ratio: 9 / 19.5;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.floating-pill-card {
  position: absolute;
  bottom: 30px;
  right: -24px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 250px;
  animation: floatSlow 4s ease-in-out infinite;
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.pill-icon-box {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background-color: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pill-card-text h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.pill-card-text p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

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

.section-tag {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-primary);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Features Grid */
.features-section {
  padding: 96px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.feature-icon-wrapper {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background-color: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.feature-badge-new {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background-color: var(--brand-primary);
  color: #FFFFFF;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Feature Spotlight Section */
.spotlight-section {
  padding: 80px 0;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.spotlight-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  margin-bottom: 88px;
}

.spotlight-row:last-child {
  margin-bottom: 0;
}

.spotlight-row.reverse {
  direction: rtl;
}

.spotlight-row.reverse > * {
  direction: ltr;
}

.spotlight-content h3 {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.spotlight-content p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.spotlight-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.spotlight-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.spotlight-checklist svg {
  width: 20px;
  height: 20px;
  color: var(--brand-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.spotlight-preview {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-md);
  display: flex;
  justify-content: center;
  gap: 16px;
  align-items: center;
}

.spotlight-preview img {
  border-radius: var(--radius-lg);
  max-height: 480px;
  box-shadow: var(--shadow-sm);
}

.spotlight-preview.dual img {
  max-height: 430px;
  width: calc(50% - 8px);
  object-fit: contain;
}

/* Scenarios / Use Cases */
.scenarios-section {
  padding: 96px 0;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: left;
}

.scenario-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-primary);
  background-color: var(--brand-light);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 14px;
}

.scenario-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.scenario-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* How it works */
.how-section {
  padding: 88px 0;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.step-card {
  position: relative;
  padding: 20px;
}

.step-num {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--brand-light-border);
  line-height: 1;
  margin-bottom: 16px;
  font-weight: 700;
}

.step-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* CTA Download Banner */
.cta-section {
  padding: 96px 0;
}

.cta-banner {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-banner h2 {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-banner p {
  font-size: 1.15rem;
  opacity: 0.92;
  max-width: 600px;
  margin: 0 auto 36px;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-banner .app-store-btn {
  background-color: #FFFFFF;
  color: #000000 !important;
}

.cta-banner .app-store-btn svg {
  fill: #000000;
}

.cta-specs {
  margin-top: 24px;
  font-size: 0.85rem;
  opacity: 0.8;
}

/* FAQ Accordion */
.faq-section {
  padding: 88px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: var(--border-strong);
}

.faq-question {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--brand-primary);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  margin-top: 14px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 36px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h4 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.6;
  margin-bottom: 18px;
}

.footer-col h5 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a:hover {
  color: var(--brand-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* Policy & Support Pages Content Styling */
.doc-page-header {
  padding: 64px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
}

.doc-page-header h1 {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.doc-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.doc-container {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

.doc-prose {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.doc-prose h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.doc-prose h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 12px;
}

.doc-prose p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.doc-prose ul, .doc-prose ol {
  margin-bottom: 24px;
  padding-left: 28px;
  color: var(--text-secondary);
}

.doc-prose li {
  margin-bottom: 8px;
}

.doc-callout {
  background-color: var(--brand-light);
  border-left: 4px solid var(--brand-primary);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 28px 0;
  font-size: 0.98rem;
  color: var(--text-primary);
}

.doc-callout strong {
  color: var(--brand-primary);
}

/* Support Help Cards */
.support-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.support-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: left;
}

.support-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.support-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.support-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.support-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--brand-primary);
  font-size: 0.92rem;
}

.support-btn:hover {
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }
  .hero-content {
    max-width: 100%;
    margin: 0 auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .value-badges {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .spotlight-row, .spotlight-row.reverse {
    grid-template-columns: 1fr;
    direction: ltr !important;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.4rem;
  }
  .section-title {
    font-size: 1.9rem;
  }
  .cta-banner h2 {
    font-size: 2.1rem;
  }
  .features-grid, .steps-grid, .scenarios-grid, .support-cards-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .nav-cta-btn {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .floating-pill-card {
    display: none;
  }
}