/* === BASE === */
:root {
  --bg: #070b12;
  --bg-card: #0c1420;
  --bg-card-alt: #0a111a;
  --fg: #e8eaf0;
  --fg-muted: #7a8599;
  --cyan: #00e5ff;
  --cyan-dim: rgba(0, 229, 255, 0.12);
  --cyan-glow: rgba(0, 229, 255, 0.08);
  --amber: #f59e0b;
  --amber-dim: rgba(245, 158, 11, 0.12);
  --border: rgba(255,255,255,0.07);
  --radius: 14px;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

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

/* === NAV === */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(7,11,18,0.8);
  backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.3px;
}

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

.nav-links a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 48px 80px;
}

.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(0,229,255,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1100px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}

.hero-headline {
  font-family: var(--font-head);
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-lede {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-tagline {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.5px;
}

/* App Card */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-end;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  width: 280px;
  box-shadow: 0 0 40px rgba(0,229,255,0.06), 0 20px 60px rgba(0,0,0,0.4);
}

.app-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.app-card-title {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-muted);
  letter-spacing: 0.5px;
}

.app-card-badge {
  background: var(--cyan-dim);
  color: var(--cyan);
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
}

.water-ring {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
}

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

.water-ring-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.water-drop-icon { line-height: 0; }

.water-percent {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
}

.app-card-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.stat { text-align: center; }

.stat-value {
  display: block;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
}

.stat-label {
  display: block;
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 2px;
}

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

.session-bar {
  margin-top: 16px;
  padding: 10px 12px;
  background: var(--amber-dim);
  border-radius: 8px;
  border: 1px solid rgba(245,158,11,0.2);
}

.session-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--amber);
  margin-bottom: 6px;
}

.session-progress {
  height: 3px;
  background: rgba(245,158,11,0.3);
  border-radius: 2px;
  position: relative;
}

.session-progress::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 40%;
  background: var(--amber);
  border-radius: 2px;
}

/* Break Card */
.break-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 18px;
  width: 280px;
  box-shadow: 0 0 20px rgba(245,158,11,0.06);
}

.break-icon { line-height: 0; }

.break-title {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}

.break-sub {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 2px;
}

/* === FEATURES === */
.features {
  padding: 100px 48px;
  max-width: 1100px;
  margin: 0 auto;
}

.features-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}

.section-headline {
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--fg);
}

.section-headline.left { text-align: left; }

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.feature-card:hover {
  border-color: rgba(0,229,255,0.25);
  box-shadow: 0 0 30px var(--cyan-glow);
}

.feature-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon-wrap.cyan { background: var(--cyan-dim); color: var(--cyan); }
.feature-icon-wrap.amber { background: var(--amber-dim); color: var(--amber); }

.feature-title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
  letter-spacing: -0.2px;
}

.feature-body {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* === PHILOSOPHY === */
.philosophy {
  padding: 100px 48px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card-alt) 50%, var(--bg) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.philosophy-label {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.quote-text {
  font-size: 20px;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 28px;
  font-style: italic;
}

.quote-text.accent {
  color: var(--cyan);
  font-style: normal;
  font-weight: 500;
}

/* === SESSION SECTION === */
.session-section {
  padding: 100px 48px;
}

.session-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.session-visual {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.session-meter { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; }

.session-meter-label {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 16px;
}

.session-meter-track {
  height: 6px;
  background: rgba(255,255,255,0.07);
  border-radius: 4px;
  position: relative;
  margin-bottom: 8px;
}

.session-meter-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), rgba(0,229,255,0.4));
  border-radius: 4px;
}

.session-meter-marker {
  position: absolute;
  top: -8px;
  transform: translateX(-50%);
}

.marker-dot {
  width: 10px;
  height: 10px;
  background: var(--amber);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--amber);
}

.marker-label {
  font-size: 10px;
  color: var(--amber);
  font-family: var(--font-head);
  font-weight: 600;
  margin-top: 4px;
  text-align: center;
}

.session-meter-times {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 6px;
}

.session-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.s-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.s-card.amber { border-color: rgba(245,158,11,0.2); background: var(--amber-dim); }

.s-card-value {
  display: block;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
}

.s-card.amber .s-card-value { color: var(--amber); }

.s-card-sub {
  display: block;
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 4px;
}

.session-text {}

.session-body {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 20px;
}

/* === CLOSING === */
.closing {
  padding: 120px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0,229,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.closing-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }

.closing-headline {
  font-family: var(--font-head);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--fg);
  margin-bottom: 24px;
}

.closing-body {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* === FOOTER === */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
}

.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 100px 24px 60px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { align-items: center; }
  .features { padding: 60px 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .philosophy { padding: 60px 24px; }
  .session-section { padding: 60px 24px; }
  .session-inner { grid-template-columns: 1fr; gap: 48px; }
  .closing { padding: 80px 24px; }
  .footer { padding: 24px; }
  .footer-inner { flex-direction: column; gap: 12px; }
}