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

:root {
    --primary: #e53935;
    --primary-dark: #c62828;
    --primary-light: #ff6f60;
    --secondary: #1a1a2e;
    --accent: #ffd700;
    --text: #1a1a2e;
    --text-light: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #1a1a2e;
    --border: #e5e7eb;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.25rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: #2d2d4a;
    transform: translateY(-2px);
}

.btn-outline {
    border-color: var(--primary);
    color: var(--primary);
    background: transparent;
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

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

.btn-white:hover {
    background: #f8fafc;
    transform: translateY(-2px);
}

.btn-outline-white {
    border-color: white;
    color: white;
    background: transparent;
}

.btn-outline-white:hover {
    background: white;
    color: var(--primary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* Badges */
.badge, .section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(229, 57, 53, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--primary);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
}

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

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

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

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #fff 0%, var(--bg-alt) 100%);
    overflow: hidden;
}

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

.hero-content {
    max-width: 600px;
}

.hero h1 {
    margin-bottom: 24px;
}

.highlight {
    color: var(--primary);
    position: relative;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

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

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
}

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

/* App Preview */
.hero-visual {
    display: flex;
    justify-content: center;
}

.app-preview {
    width: 100%;
    max-width: 500px;
    background: var(--secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.app-header {
    padding: 12px 16px;
    background: #2d2d4a;
}

.app-dots {
    display: flex;
    gap: 8px;
}

.app-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #4a4a6a;
}

.app-dots span:first-child { background: #ff5f56; }
.app-dots span:nth-child(2) { background: #ffbd2e; }
.app-dots span:nth-child(3) { background: #27ca40; }

.app-content {
    display: flex;
    padding: 20px;
    min-height: 300px;
    gap: 16px;
}

.app-sidebar {
    width: 60px;
    background: #2d2d4a;
    border-radius: 8px;
}

.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.app-card {
    background: #2d2d4a;
    border-radius: 8px;
    height: 80px;
}

.app-card.small {
    height: 60px;
    width: 60%;
}

/* Problem Section */
.problem {
    padding: 100px 0;
    background: var(--bg);
}

.problem h2 {
    text-align: center;
    margin-bottom: 60px;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.problem-card {
    text-align: center;
    padding: 32px;
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.problem-card h3 {
    margin-bottom: 12px;
}

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

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-alt);
}

.features h2 {
    text-align: center;
    margin-bottom: 60px;
}

.features .section-badge {
    display: block;
    text-align: center;
}

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

.feature-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    margin-bottom: 12px;
}

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

/* Crowdfunding Section */
.crowdfunding {
    padding: 100px 0;
    background: var(--bg);
}

.crowdfunding h2 {
    text-align: center;
    margin-bottom: 16px;
}

.crowdfunding .section-badge {
    display: block;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 48px;
    font-size: 1.1rem;
}

.progress-section {
    max-width: 600px;
    margin: 0 auto 60px;
}

.progress-bar {
    height: 20px;
    background: var(--bg-alt);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 10px;
    transition: width 1s ease;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    color: var(--text-light);
}

.tiers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.tier-card {
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
}

.tier-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.tier-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.tier-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tier-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.tier-card h3 {
    margin-bottom: 20px;
}

.tier-card ul {
    list-style: none;
    margin-bottom: 24px;
    text-align: left;
}

.tier-card li {
    padding: 8px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 24px;
}

.tier-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.tier-card .btn {
    width: 100%;
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--bg-alt);
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.about h2 {
    margin-bottom: 24px;
}

.about p {
    color: var(--text-light);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.tech-stack {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.tech-badge {
    padding: 8px 16px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
    color: white;
}

.cta h2 {
    margin-bottom: 16px;
}

.cta p {
    opacity: 0.9;
    margin-bottom: 32px;
    font-size: 1.2rem;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
    margin-top: 16px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    margin-bottom: 20px;
    font-size: 1rem;
}

.footer-column a {
    display: block;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.4);
}

/* Responsive */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .hero-visual {
        order: -1;
    }

    .problem-grid,
    .features-grid,
    .tiers-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
}