/* ========================================
   JoyBreath Landing Page — Styles
   ======================================== */

:root {
  --color-primary: #2a9d8f;
  --color-primary-dark: #1f7a6e;
  --color-primary-light: #48c9b0;
  --color-primary-pale: #e8f5f2;
  --color-accent: #264653;
  --color-bg: #fafcfb;
  --color-bg-alt: #f0f5f3;
  --color-surface: #ffffff;
  --color-text: #1a2e2a;
  --color-text-secondary: #5a7a72;
  --color-text-muted: #8aa39b;
  --color-border: #d4e5e0;
  --color-border-light: #e8f0ee;
  --shadow-sm: 0 1px 3px rgba(26, 46, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 46, 42, 0.08);
  --shadow-lg: 0 8px 32px rgba(26, 46, 42, 0.1);
  --shadow-xl: 0 16px 48px rgba(26, 46, 42, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 252, 251, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

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

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

.nav-links a:not(.nav-cta):hover {
  color: var(--color-primary);
}

.nav-links a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
  border-radius: 1px;
}

.nav-links a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 100px;
  font-weight: 600;
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(42, 157, 143, 0.3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 60px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 80%, rgba(42, 157, 143, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 20%, rgba(72, 201, 176, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 50% 0%, rgba(38, 70, 83, 0.04) 0%, transparent 60%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-pale);
  color: var(--color-primary-dark);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(42, 157, 143, 0.25);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(42, 157, 143, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-border);
}

/* ── Device Mockup ── */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.device-mockup {
  position: relative;
  width: 280px;
  height: 560px;
  background: var(--color-surface);
  border-radius: 36px;
  border: 2px solid var(--color-border-light);
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0,0,0,0.02);
  overflow: hidden;
}

.mockup-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: var(--color-surface);
  border-radius: 0 0 18px 18px;
  border: 2px solid var(--color-border-light);
  border-top: none;
}

.mockup-screen {
  width: 100%;
  height: 100%;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.mockup-header {
  padding: 8px 16px 0;
}

.mockup-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text);
  padding: 8px 4px;
}

.mockup-icons { display: flex; gap: 4px; align-items: center; }
.signal-bar, .wifi-icon, .battery-icon {
  width: 16px; height: 10px;
  background: var(--color-text);
  border-radius: 2px;
  opacity: 0.3;
}

.mockup-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 4px;
}

.mockup-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-pale), var(--color-primary-light));
}

.mockup-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-accent);
}

.mockup-body {
  flex: 1;
  padding: 8px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.mockup-score-ring {
  position: relative;
  width: 140px;
  height: 140px;
}

.mockup-score-ring svg {
  width: 100%;
  height: 100%;
}

.score-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.score-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

.score-unit {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: 8px;
}

.mockup-metrics {
  display: flex;
  gap: 16px;
  width: 100%;
}

.metric {
  flex: 1;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 10px;
  text-align: center;
}

.metric-label {
  display: block;
  font-size: 10px;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.metric-val {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
}

.mockup-chart {
  width: 100%;
  padding: 12px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  position: relative;
}

.mockup-chart svg { width: 100%; height: 60px; }

.chart-label {
  display: block;
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 4px;
  text-align: center;
}

/* Floating cards */
.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-surface);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
  animation: float 4s ease-in-out infinite;
}

.card-ble {
  top: 80px;
  left: -40px;
  animation-delay: 0s;
}

.card-sync {
  bottom: 120px;
  right: -30px;
  animation-delay: 2s;
}

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

/* Hero scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-dot {
  width: 4px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { opacity: 1; transform: translateY(0); }
  50% { opacity: 0.3; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ── Section Headers ── */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ── Features ── */
.features {
  padding: 120px 0;
  background: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42, 157, 143, 0.2);
}

.feature-card-lg {
  grid-column: 1;
  grid-row: 1 / 3;
  display: flex;
  flex-direction: column;
  background: linear-gradient(160deg, var(--color-surface) 0%, var(--color-primary-pale) 100%);
  border-color: rgba(42, 157, 143, 0.15);
}

.feature-card-lg .feature-icon {
  width: 56px;
  height: 56px;
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.feature-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 20px;
}

.feature-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  background: rgba(42, 157, 143, 0.1);
  color: var(--color-primary-dark);
  border-radius: 100px;
}

/* ── Platforms ── */
.platforms {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

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

.platform-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.platform-card-accent {
  background: linear-gradient(160deg, var(--color-accent) 0%, #1a3342 100%);
  color: #fff;
  border-color: transparent;
}

.platform-card-accent h3 { color: #fff; }
.platform-card-accent p { color: rgba(255,255,255,0.75); }
.platform-card-accent .platform-badge { background: rgba(255,255,255,0.15); color: rgba(255,255,255,0.9); }

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  color: var(--color-primary);
}

.platform-card-accent .platform-icon { color: var(--color-primary-light); }

.platform-icon svg { width: 100%; height: 100%; }

.platform-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.platform-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.platform-badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  background: var(--color-bg-alt);
  border-radius: 100px;
  color: var(--color-text-secondary);
}

/* ── Data Flow ── */
.dataflow {
  padding: 120px 0;
  background: var(--color-bg);
}

.dataflow-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.dataflow-content h2 {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-accent);
  margin: 12px 0 16px;
}

.dataflow-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

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

.dataflow-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.dataflow-list li svg { flex-shrink: 0; }

.flow-diagram {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.flow-node-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: var(--transition);
}

.flow-device .flow-node-icon { background: #e8f5f2; }
.flow-app .flow-node-icon { background: #e0f0ff; color: #3b82f6; }
.flow-cloud .flow-node-icon { background: #f0e8f5; color: #8b5cf6; }

.flow-node-icon svg { width: 32px; height: 32px; }

.flow-node span {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.flow-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.flow-arrow svg { width: 40px; height: 12px; }

.flow-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

/* ── Security ── */
.security {
  padding: 120px 0;
  background: var(--color-accent);
  color: #fff;
}

.security .section-tag { color: var(--color-primary-light); }
.security .section-header h2 { color: #fff; }
.security .section-header p { color: rgba(255, 255, 255, 0.65); }

.security-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.security-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition);
}

.security-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.security-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary-light);
  margin-bottom: 20px;
}

.security-icon svg { width: 100%; height: 100%; }

.security-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}

.security-card p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

/* ── About ── */
.about {
  padding: 120px 0;
  background: var(--color-bg);
}

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

.about-content .section-tag {
  display: block;
  margin-bottom: 16px;
}

.about-content h2 {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.about-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.highlight {
  text-align: center;
  padding: 24px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

.highlight-num {
  display: block;
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.highlight-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ── Contact ── */
.contact {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.contact-inner {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-content .section-tag {
  display: block;
  margin-bottom: 16px;
}

.contact-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.contact-content > p {
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: var(--transition);
  text-align: left;
}

.contact-method:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.contact-method svg { color: var(--color-primary); flex-shrink: 0; }

.contact-method-label {
  display: block;
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.contact-method-value {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

/* ── Footer ── */
.footer {
  padding: 60px 0 40px;
  background: var(--color-accent);
  color: rgba(255, 255, 255, 0.65);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer-logo .nav-logo-icon { color: var(--color-primary-light); }

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 10px;
  transition: var(--transition);
}

.footer-col a:hover { color: var(--color-primary-light); }

.footer-bottom {
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ── Animations ── */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate="fade-left"] {
  transform: translateX(40px);
}

[data-animate].visible {
  opacity: 1;
  transform: translate(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-content { order: 1; }
  .hero-visual { order: 0; margin-bottom: 20px; }
  .hero-desc { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card-lg { grid-column: auto; grid-row: auto; }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .platforms-grid .platform-card:last-child { grid-column: 1 / -1; max-width: 400px; margin: 0 auto; }
  .security-grid { grid-template-columns: repeat(2, 1fr); }
  .dataflow-inner { grid-template-columns: 1fr; }
  .dataflow-visual { order: -1; }
}

@media (max-width: 768px) {
  .nav-links { 
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(250, 252, 251, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  
  .hero { padding: 80px 0 60px; min-height: auto; }
  .hero h1 { font-size: 32px; }
  .device-mockup { width: 220px; height: 440px; }
  .floating-card { display: none; }
  .hero-scroll { display: none; }
  
  .features, .platforms, .dataflow, .security, .about, .contact { padding: 80px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .platforms-grid { grid-template-columns: 1fr; }
  .platforms-grid .platform-card:last-child { max-width: none; }
  .security-grid { grid-template-columns: 1fr; }
  .about-highlights { grid-template-columns: 1fr; }
  
  .footer-inner { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 32px; }
  
  .flow-diagram { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
  
  .hero-stats { flex-direction: column; gap: 12px; }
  .stat-divider { width: 40px; height: 1px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .section-header { margin-bottom: 40px; }
}