/* GrandparentTV - Clean, Dark, Polished */

:root {
  --bg: #0f1419;
  --bg-light: #161d27;
  --bg-card: #1e2836;
  --text: #e8eaed;
  --text-muted: #9aa0a6;
  --accent: #8ab4f8;
  --accent-hover: #aecbfa;
  --success: #81c995;
  --radius: 12px;
  --radius-lg: 20px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  line-height: 1.3;
  font-weight: 600;
}

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

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 20, 25, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
}

.logo:hover {
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  background: var(--bg-card);
  padding: 8px 18px;
  border-radius: var(--radius);
}

.nav-cta:hover {
  background: var(--bg-light);
}

/* Hero */
.hero {
  padding: 140px 0 48px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(138, 180, 248, 0.25);
  color: var(--bg);
}

/* Demo Section - Devices */
.demo {
  padding: 48px 0 72px;
}

.devices {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.device-label {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* iPad */
.ipad-frame {
  background: linear-gradient(145deg, #2a2a2a 0%, #1a1a1a 50%, #0f0f0f 100%);
  border-radius: 20px;
  padding: 10px;
  box-shadow:
    0 30px 60px rgba(0,0,0,0.5),
    0 0 0 1px rgba(255,255,255,0.08),
    inset 0 1px 0 rgba(255,255,255,0.1);
  width: 180px;
}

.ipad-notch {
  width: 40px;
  height: 4px;
  background: #1a1a1a;
  border-radius: 3px;
  margin: 0 auto 8px;
}

.ipad-screen {
  background: linear-gradient(180deg, #1e3a5f 0%, #152a45 100%);
  border-radius: 12px;
  overflow: hidden;
}

.app-header {
  padding: 10px 10px;
  font-size: 11px;
  font-weight: 600;
  color: white;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  padding: 0 10px 12px;
}

.app-tile {
  background: var(--bg, #666);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.app-tile:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.app-tile:active {
  transform: scale(0.95);
}

.tile-img {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.05) 100%);
}

.app-tile span {
  display: block;
  padding: 5px 4px;
  font-size: 8px;
  font-weight: 600;
  color: white;
  text-align: center;
  background: rgba(0,0,0,0.2);
}

/* Arrow */
.flow-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.arrow-icon {
  font-size: 32px;
  color: var(--accent);
}

.arrow-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  font-weight: 500;
}

/* TV */
.tv-frame {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tv-screen {
  background: linear-gradient(145deg, #1a1a1a 0%, #0a0a0a 100%);
  border-radius: 16px;
  padding: 12px;
  box-shadow:
    0 30px 60px rgba(0,0,0,0.5),
    0 0 0 1px rgba(255,255,255,0.05);
  width: 400px;
  transition: opacity 0.1s ease;
}

.tv-content {
  background: linear-gradient(180deg, #e5091422 0%, #101318 60%);
  border-radius: 8px;
  padding: 64px 32px;
  position: relative;
  min-height: 180px;
  transition: background 0.4s ease;
}

.tv-service {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tv-service.active {
  opacity: 1;
}

.tv-playing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  transition: opacity 0.3s ease;
}

.tv-playing.hidden {
  opacity: 0;
}

.tv-play {
  font-size: 48px;
  color: var(--success);
}

.tv-title {
  font-size: 16px;
  color: var(--text-muted);
}

.tv-stand {
  width: 100px;
  height: 10px;
  background: linear-gradient(180deg, #2a2a2a 0%, #1a1a1a 100%);
  border-radius: 0 0 4px 4px;
  margin-top: -2px;
}

@media (max-width: 700px) {
  .devices {
    flex-direction: column;
    gap: 24px;
  }
  .flow-arrow {
    transform: rotate(90deg);
  }
  .ipad-frame {
    width: 160px;
  }
  .tv-screen {
    width: 300px;
  }
  .tv-content {
    padding: 48px 24px;
    min-height: 140px;
  }
  .tv-service {
    font-size: 22px;
  }
  .tv-play {
    font-size: 36px;
  }
  .tv-title {
    font-size: 14px;
  }
}

/* Quick Info Section */
.quick-info {
  padding: 64px 0;
  background: var(--bg-light);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.info-card {
  background: var(--bg-card);
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.04);
}

.info-card h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--accent);
}

.info-card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.info-card ul {
  list-style: none;
  color: var(--text-muted);
  font-size: 14px;
}

.info-card li {
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.info-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-size: 12px;
}

.info-cta {
  text-align: center;
}

.info-cta a {
  font-size: 14px;
  font-weight: 500;
}

/* Why Section */
.why {
  padding: 80px 0;
  text-align: center;
}

.why h2 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.why p {
  max-width: 600px;
  margin: 0 auto 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

.why strong {
  color: var(--text);
}

/* Explanation Section */
.explanation {
  padding: 48px 0;
  text-align: center;
}

.explanation p {
  max-width: 580px;
  margin: 0 auto 12px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* What You Need Section */
.what-you-need {
  padding: 56px 0;
  background: var(--bg-light);
}

.what-you-need h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  text-align: center;
}

.needs-list {
  list-style: none;
  max-width: 480px;
  margin: 0 auto 16px;
}

.needs-list li {
  padding: 10px 0;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.needs-list li:last-child {
  border-bottom: none;
}

.needs-list strong {
  color: var(--text);
}

.needs-note {
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* Personal Section */
.personal {
  padding: 64px 0;
  text-align: center;
}

.personal p {
  max-width: 560px;
  margin: 0 auto 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

.personal-note {
  margin-top: 24px !important;
  font-style: italic;
  color: var(--text) !important;
}

/* CTA Section */
.cta {
  padding: 64px 0;
  text-align: center;
  background: var(--bg-light);
}

.cta h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.cta p {
  color: var(--text-muted);
  margin-bottom: 28px;
}

.cta-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-muted);
}

/* Footer */
.footer {
  padding: 32px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ========================================
   How It Works Page
   ======================================== */

.page-hero {
  padding: 120px 0 48px;
  text-align: center;
  background: var(--bg-light);
}

.page-hero h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.page-content {
  padding: 40px 0 64px;
}

.content-section {
  margin-bottom: 64px;
}

.content-section h2 {
  font-size: 1.35rem;
  margin-bottom: 20px;
  color: var(--accent);
}

.content-section p {
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
  max-width: 700px;
}

.content-section ul, .content-section ol {
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-left: 24px;
  line-height: 1.8;
}

.content-section li {
  margin-bottom: 8px;
}

.content-section strong {
  color: var(--text);
}

/* Architecture Diagram */
.arch-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin: 32px 0;
  padding: 32px;
  background: var(--bg-card);
  border-radius: var(--radius);
}

.arch-box {
  text-align: center;
  padding: 20px 24px;
  background: var(--bg-light);
  border-radius: var(--radius);
  min-width: 140px;
  border: 1px solid rgba(255,255,255,0.06);
}

.arch-box strong {
  display: block;
  color: var(--accent);
  margin-bottom: 4px;
  font-size: 14px;
}

.arch-box span {
  font-size: 12px;
  color: var(--text-muted);
}

.arch-arrow {
  color: var(--text-muted);
  font-size: 20px;
}

@media (max-width: 600px) {
  .arch-diagram {
    flex-direction: column;
  }
  .arch-arrow {
    transform: rotate(90deg);
  }
}

/* Callout boxes */
.callout {
  padding: 20px 24px;
  border-radius: var(--radius);
  margin: 24px 0;
  border-left: 3px solid;
}

.callout-info {
  background: rgba(138, 180, 248, 0.08);
  border-color: var(--accent);
}

/* How It Works - Visual Flow */
.flow-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 36px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
}

.flow-step {
  text-align: center;
  min-width: 100px;
}

.flow-icon {
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 20px;
  margin: 0 auto 12px;
}

.flow-device {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 4px;
}

.flow-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.flow-connector {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--text-muted) 100%);
  opacity: 0.5;
}

.flow-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.info-card-simple {
  background: var(--bg-light);
  padding: 20px 24px;
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
  margin-bottom: 32px;
  max-width: 600px;
}

.info-card-simple h3 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--text);
}

.info-card-simple p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.services-section {
  text-align: center;
  margin-bottom: 32px;
}

.services-section h3 {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-weight: 500;
}

.services-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.service-pill {
  padding: 8px 16px;
  background: var(--bg-card);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--c, #555);
  color: var(--c, var(--text-muted));
}

.key-points {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
}

.key-point {
  display: flex;
  align-items: center;
  gap: 12px;
}

.key-icon {
  width: 32px;
  height: 32px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 14px;
}

.key-point strong {
  display: block;
  font-size: 14px;
}

.key-point span {
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 600px) {
  .flow-visual {
    flex-direction: column;
    gap: 16px;
  }
  .flow-connector {
    width: 2px;
    height: 24px;
    background: linear-gradient(180deg, var(--accent) 0%, var(--text-muted) 100%);
  }
  .key-points {
    flex-direction: column;
    gap: 20px;
  }
}

.callout-success {
  background: rgba(129, 201, 149, 0.08);
  border-color: var(--success);
}

.callout p {
  margin: 0;
}

/* ========================================
   Setup Guide Page
   ======================================== */

.guide-hero {
  padding: 120px 0 48px;
  background: var(--bg-light);
}

.guide-hero h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.guide-hero p {
  color: var(--text-muted);
}

.guide-content {
  padding: 48px 0;
}

.guide-layout {
  display: grid;
  gap: 48px;
}

@media (min-width: 900px) {
  .guide-layout {
    grid-template-columns: 200px 1fr;
  }
}

.guide-nav {
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius);
  height: fit-content;
  position: sticky;
  top: 80px;
}

.guide-nav h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.guide-nav ol {
  list-style: none;
}

.guide-nav li {
  margin-bottom: 6px;
}

.guide-nav a {
  color: var(--text-muted);
  font-size: 13px;
  display: block;
  padding: 6px 0;
}

.guide-nav a:hover,
.guide-nav a.active {
  color: var(--accent);
}

.guide-section {
  margin-bottom: 56px;
  scroll-margin-top: 100px;
}

.guide-section h2 {
  font-size: 1.35rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.guide-section h3 {
  font-size: 1rem;
  margin: 28px 0 12px;
  color: var(--accent);
}

.guide-section p {
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.7;
}

.guide-section ul, .guide-section ol {
  margin-bottom: 14px;
  padding-left: 20px;
  color: var(--text-muted);
}

.guide-section li {
  margin-bottom: 6px;
}

.guide-section strong {
  color: var(--text);
}

.guide-section code {
  background: var(--bg-light);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'SF Mono', Monaco, monospace;
}

.guide-section pre {
  background: #0d1117;
  padding: 18px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 18px 0;
}

.guide-section pre code {
  background: none;
  padding: 0;
  color: var(--text);
}

.guide-callout {
  padding: 18px 20px;
  border-radius: var(--radius);
  margin: 20px 0;
  border-left: 3px solid;
}

.guide-callout-info {
  background: rgba(138, 180, 248, 0.08);
  border-color: var(--accent);
}

.guide-callout-warning {
  background: rgba(251, 188, 4, 0.08);
  border-color: #fbbc04;
}

.guide-callout-success {
  background: rgba(129, 201, 149, 0.08);
  border-color: var(--success);
}

.guide-callout strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
}

.guide-callout p {
  margin: 0;
}

.guide-step-list {
  list-style: none;
  padding: 0;
  counter-reset: steps;
}

.guide-step-list > li {
  counter-increment: steps;
  position: relative;
  padding-left: 44px;
  margin-bottom: 28px;
}

.guide-step-list > li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
}

.guide-step-list strong {
  display: block;
  color: var(--text);
  margin-bottom: 6px;
}

/* Setup Options */
.setup-option {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid rgba(255,255,255,0.04);
}

.setup-option h3 {
  margin-top: 0;
  color: var(--text);
}

.setup-option ol {
  margin: 14px 0;
  padding-left: 20px;
}

.option-difficulty {
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 10px !important;
}

.option-note {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 10px;
}

/* Architecture for setup page */
.architecture {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0;
  padding: 24px;
  background: var(--bg-light);
  border-radius: var(--radius);
}

.arch-item {
  text-align: center;
  padding: 16px 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  min-width: 130px;
}

.arch-item strong {
  display: block;
  color: var(--accent);
  margin-bottom: 4px;
  font-size: 13px;
}

.arch-item span {
  font-size: 11px;
  color: var(--text-muted);
}

.arch-arrow {
  color: var(--text-muted);
  font-size: 20px;
}

@media (max-width: 600px) {
  .architecture {
    flex-direction: column;
  }
  .arch-arrow {
    transform: rotate(90deg);
  }
}