/* CSS Variables */
:root {
    --primary-blue: #55d0ff;
    --primary-pink: #ff99aa;
    --primary-white: #ffffff;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --gradient-brand: linear-gradient(135deg, #55d0ff 0%, #ff99aa 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-main);
    background-color: var(--primary-white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.mt-4 {
    margin-top: 1.5rem;
}

.bg-light {
    background-color: var(--light-bg);
}

.border-radius-md {
    border-radius: 0.5rem;
}

.shadow-sm {
    box-shadow: var(--shadow-sm);
}

/* Components */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-brand);
    color: white;
    box-shadow: 0 4px 15px rgba(85, 208, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(85, 208, 255, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid #e2e8f0;
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.btn-dark {
    background-color: var(--dark-bg);
    color: white;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    background-color: rgba(85, 208, 255, 0.1);
    color: #0ea5e9;
}

.badge-blue {
    background-color: rgba(85, 208, 255, 0.1);
    color: #0088cc;
}

.badge-dark {
    background-color: #e2e8f0;
    color: var(--dark-bg);
}

.badge-purple {
    background-color: rgba(255, 255, 255, 0.1);
    color: #e0e7ff;
}

/* Header */
.header {
    padding: 1.5rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-icon {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-icon.white {
    background: none;
    -webkit-text-fill-color: initial;
    color: white;
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-list a {
    font-weight: 500;
    color: var(--text-muted);
}

.nav-list a:hover {
    color: var(--primary-blue);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
}

/* Hero */
.hero {
    padding-top: 8rem;
    padding-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.gradient-bg {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #f0f9ff 0%, #fff1f2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Logos */
.logos-section {
    border-top: 1px solid #f1f5f9;
    padding: 2rem 0;
    background-color: #f8fafc;
}

.logos-title {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.logos-grid {
    display: flex;
    justify-content: center;
    gap: 3rem;
    opacity: 0.7;
}

.logo-item {
    font-weight: 800;
    font-size: 1.25rem;
    color: #94a3b8;
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid #f1f5f9;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: #e2e8f0;
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
}

.icon-hormone {
    background-color: var(--primary-pink);
}

.icon-ai {
    background-color: var(--primary-blue);
}

.icon-network {
    background-color: #8b5cf6;
}

.icon-mood {
    background-color: #f59e0b;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* App Showcase */
.app-showcase {
    display: flex;
    gap: 4rem;
    align-items: center;
    margin-top: 6rem;
    background: #f0f9ff;
    padding: 4rem;
    border-radius: 2rem;
    position: relative;
    overflow: hidden;
}

.app-mockup-img {
    height: 400px;
    object-fit: contain;
}

.app-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.store-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-store {
    background-color: black;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

/* Professional Section */
.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.check-list {
    margin-top: 2rem;
}

.check-list li {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.check-list svg {
    color: var(--primary-blue);
    flex-shrink: 0;
}

/* AI Section */
.ai-section {
    background-color: var(--dark-bg);
    color: white;
    position: relative;
    overflow: hidden;
}

.text-white {
    color: white;
}

.text-white-opacity {
    color: rgba(255, 255, 255, 0.7);
}

.ai-visual {
    margin: 3rem 0;
    display: flex;
    justify-content: center;
}

.ai-concept-img {
    height: 300px;
    opacity: 0.9;
}

.stats-grid {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 3rem;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 4rem 0 2rem 0;
    border-top: 1px solid #1e293b;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: #94a3b8;
}

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: #e2e8f0;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary-blue);
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: white;
    opacity: 0.7;
}

.footer-social a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #1e293b;
    font-size: 0.875rem;
    color: #64748b;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }

    .nav {
        display: none;
    }

    /* Mobile Menu Logic in JS */
    .sm-hidden {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .row {
        grid-template-columns: 1fr;
    }

    .app-showcase {
        flex-direction: column;
        padding: 2rem;
    }

    .app-mockup-img {
        height: 300px;
    }

    .stats-grid {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}