@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@600;700;800&display=swap');

:root {
    --primary: #4CAF50;
    --secondary: #CDDC39;
    --bg-dark: #0a0a0a;
    --bg-card: #161616;
    --text-main: #ffffff;
    --text-dim: #a0a0a0;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --nav-bg: rgba(10, 10, 10, 0.8);
    --grad-health: linear-gradient(135deg, #4CAF50 0%, #8BC34A 100%);
    --grad-text: linear-gradient(to bottom, #fff, #bbb);
    --transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
    --bg-dark: #fbfbfb;
    --bg-card: #ffffff;
    --text-main: #1d1d1f;
    --text-dim: #86868b;
    --glass: rgba(0, 0, 0, 0.02);
    --glass-border: rgba(0, 0, 0, 0.1);
    --nav-bg: rgba(251, 251, 251, 0.8);
    --grad-text: linear-gradient(to bottom, #1d1d1f, #4d4d4f);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Nav */
nav {
    height: 90px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

nav .container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo-img {
    height: 40px;
    width: 40px;
    border-radius: 12px;
}

.logo {
    font-size: 1.6rem;
    background: var(--grad-health);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    width: 45px;
    height: 45px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--glass-border);
    transform: scale(1.05);
}

/* Hero */
.hero {
    padding: 200px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: 10%;
    right: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.15), transparent 70%);
    filter: blur(60px);
    z-index: -1;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 5rem;
    line-height: 0.95;
    margin-bottom: 1.5rem;
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-dim);
    margin-bottom: 3rem;
    max-width: 500px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 1.2rem 3rem;
    border-radius: 100px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--grad-health);
    z-index: -1;
    transition: var(--transition);
}

.btn:hover::before {
    filter: brightness(1.1);
}

.btn span {
    color: white;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Features */
.features {
    padding: 100px 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-15px);
    border-color: var(--primary);
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}

[data-theme="light"] .card:hover {
    box-shadow: 0 30px 60px rgba(0,0,0,0.1);
}

.card i {
    font-size: 2.5rem;
    background: var(--grad-health);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
    display: block;
}

.card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.card p {
    color: var(--text-dim);
}

/* Mockup */
.mockup {
    position: relative;
    max-width: 450px;
    margin: 0 auto;
}

.mockup img {
    width: 100%;
    border-radius: 40px;
    box-shadow: 0 50px 100px rgba(0,0,0,0.8);
    transform: perspective(1000px) rotateY(-10deg) rotateX(2deg);
    transition: var(--transition);
}

.mockup:hover img {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
footer {
    padding: 100px 0 50px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
}

.footer-bottom {
    text-align: center;
    color: var(--text-dim);
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
}

@media (max-width: 968px) {
    .hero { padding: 140px 0 60px; }
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-content { display: flex; flex-direction: column; align-items: center; }
    .hero-content h1 { font-size: 3.5rem; }
    .mockup { margin-top: 4rem; }
}

@media (max-width: 640px) {
    .hero-content h1 { font-size: 2.5rem; }
    .grid { grid-template-columns: 1fr; }
    .card { padding: 2rem; }
    footer .footer-grid { text-align: center; gap: 3rem; }
    .footer-brand .logo-wrapper { justify-content: center; }
}