/* ===== CSS Variables ===== */
:root {
  --bg: #f5f5f7;
  --white: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --card-dark: #1c3a4f;
  --card-dark-alt: #1a3548;
  --accent-gold: #f5c518;
  --accent-green: #34c759;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-card: 0 4px 24px rgba(0,0,0,.06);
  --shadow-phone: 0 20px 60px rgba(0,0,0,.18);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-w: 960px;
}

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ===== Utility ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}

/* ===== Navbar ===== */
.navbar{position:fixed;top:0;width:100%;background:rgba(245,245,247,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);z-index:100;border-bottom:1px solid rgba(0,0,0,.06)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:56px}
.nav-brand{font-weight:700;font-size:1.15rem;letter-spacing:-.02em}
.nav-links{display:flex;gap:24px;font-size:.9rem;color:var(--text-secondary)}
.nav-links a:hover{color:var(--text-primary)}

/* ===== Hero ===== */
.hero{padding:120px 0 60px;text-align:center}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;letter-spacing:-.03em;line-height:1.15;margin-bottom:12px}
.hero h1 span{background:linear-gradient(135deg,var(--card-dark),#2a6a8a);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:clamp(1rem,2.5vw,1.2rem);color:var(--text-secondary);max-width:520px;margin:0 auto 32px}
.hero-cta{display:inline-flex;align-items:center;gap:10px;background:var(--text-primary);color:var(--white);padding:14px 32px;border-radius:980px;font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s}
.hero-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.hero-cta svg{width:20px;height:20px}

/* ===== Phone Mockup ===== */
.mockup-section{display:flex;justify-content:center;padding:20px 0 80px}
.phone-frame{width:300px;background:var(--white);border-radius:40px;padding:16px;box-shadow:var(--shadow-phone);border:4px solid #e0e0e0;position:relative;overflow:hidden}
.phone-notch{width:120px;height:28px;background:#1d1d1f;border-radius:0 0 18px 18px;margin:0 auto 16px;position:relative}
.phone-notch::after{content:'';position:absolute;width:10px;height:10px;background:#2a2a2a;border-radius:50%;right:18px;top:9px}

.app-screen{padding:0 4px}
.app-header{margin-bottom:20px}
.app-header h2{font-size:1.5rem;font-weight:800;letter-spacing:-.02em}
.app-header p{font-size:.75rem;color:var(--text-secondary)}

/* Cards inside mockup */
.streak-card,.lock-card{border-radius:var(--radius-md);padding:18px 16px;margin-bottom:12px;display:flex;align-items:center;gap:12px;position:relative;overflow:hidden;color:#fff}
.streak-card{background:linear-gradient(135deg,#1c3a4f,#244d66)}
.lock-card{background:linear-gradient(135deg,#1a3548,#1f4a62)}
.card-icon{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.streak-card .card-icon{background:rgba(255,255,255,.12)}
.lock-card .card-icon{background:rgba(245,197,24,.18)}
.card-text .label{font-size:.6rem;text-transform:uppercase;letter-spacing:.06em;opacity:.7}
.card-text .value{font-size:1.5rem;font-weight:800;line-height:1.2}
.card-text .value-sm{font-size:.95rem;font-weight:700}
.card-arrow{margin-left:auto;opacity:.4;font-size:.9rem}

.week-card{background:var(--bg);border-radius:var(--radius-md);padding:14px 16px;margin-bottom:12px}
.week-card .label{font-size:.6rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary);font-weight:600}
.week-card .value{font-size:2rem;font-weight:800;color:var(--accent-green);line-height:1.2}

.session-card{background:var(--bg);border-radius:var(--radius-md);padding:14px 16px;margin-bottom:12px}
.session-card .label{font-size:.6rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary);font-weight:600;margin-bottom:8px}
.session-item{display:flex;align-items:center;justify-content:space-between}
.session-item .name{font-size:.8rem;font-weight:600}
.session-item .date{font-size:.65rem;color:var(--text-secondary)}
.session-check{color:var(--accent-green);font-size:1rem}

.bottom-nav{display:flex;justify-content:space-around;padding:10px 0 4px;margin-top:12px;border-top:1px solid rgba(0,0,0,.06)}
.nav-item{text-align:center;font-size:.55rem;color:var(--text-secondary);font-weight:500}
.nav-item.active{color:var(--accent-gold)}
.nav-item .icon{font-size:1.1rem;margin-bottom:2px}

/* ===== Features Section ===== */
.features{padding:60px 0 80px}
.features h2{text-align:center;font-size:1.6rem;font-weight:800;margin-bottom:40px;letter-spacing:-.02em}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature-card{background:var(--white);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow-card);transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.1)}
.feature-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:14px}
.feature-card:nth-child(1) .feature-icon{background:rgba(28,58,79,.1)}
.feature-card:nth-child(2) .feature-icon{background:rgba(245,197,24,.15)}
.feature-card:nth-child(3) .feature-icon{background:rgba(52,199,89,.1)}
.feature-card h3{font-size:1rem;font-weight:700;margin-bottom:6px}
.feature-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.5}

/* ===== Footer ===== */
.footer{padding:32px 0;border-top:1px solid rgba(0,0,0,.08);text-align:center}
.footer-links{display:flex;justify-content:center;gap:24px;margin-bottom:12px;font-size:.85rem}
.footer-links a{color:var(--text-secondary);transition:color .2s}
.footer-links a:hover{color:var(--text-primary)}
.footer-copy{font-size:.75rem;color:var(--text-secondary)}

/* ===== Legal Pages ===== */
.legal{padding:100px 0 60px}
.legal h1{font-size:1.8rem;font-weight:800;margin-bottom:8px;letter-spacing:-.02em}
.legal .updated{font-size:.85rem;color:var(--text-secondary);margin-bottom:32px}
.legal h2{font-size:1.15rem;font-weight:700;margin:28px 0 8px}
.legal p,.legal ul{font-size:.92rem;color:var(--text-secondary);line-height:1.7;margin-bottom:12px}
.legal ul{padding-left:20px}
.legal li{margin-bottom:6px}
.legal a{color:var(--card-dark);text-decoration:underline}

/* ===== Animations ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.animate{animation:fadeUp .6s ease both}
.delay-1{animation-delay:.1s}
.delay-2{animation-delay:.2s}
.delay-3{animation-delay:.3s}
.delay-4{animation-delay:.4s}
.delay-5{animation-delay:.5s}

/* ===== Responsive ===== */
@media(max-width:600px){
  .hero{padding:100px 0 40px}
  .phone-frame{width:260px}
  .features-grid{grid-template-columns:1fr}
  .nav-links{gap:16px;font-size:.8rem}
}