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

:root {
    --primary: #0022D2;
    --primary-dark: #1E009F;
    --secondary: #FFDAFF;
    --text: #262626;
    --text-light: #828386;
    --background: #ffffff;
    --background-alt: #F8F8F8;
    --border: #EDEDED;
    --success: #20AA47;
    --gradient: linear-gradient(135deg, #0022D2 0%, #1E009F 100%);
}

html {
    scroll-behavior: smooth;
}

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

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

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

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 14px rgba(0, 34, 210, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 34, 210, 0.5);
}

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

.btn-secondary:hover {
    background: #374151;
}

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

.btn-white:hover {
    background: #f3f4f6;
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

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

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.register-interest {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* One App Banner */
.one-app-banner {
    padding: 24px 0;
    background: var(--secondary);
}

.banner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    text-align: center;
}

.banner-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
    flex-shrink: 0;
}

.banner-content span {
    font-size: 1.05rem;
    color: var(--text);
}

/* Feature Tabs */
.feature-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
}

.tab-btn {
    padding: 14px 32px;
    border: 2px solid var(--border);
    background: white;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.2s;
}

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

.tab-btn.active {
    background: var(--gradient);
    border-color: transparent;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 25px;
    background: #1a1a2e;
    border-radius: 15px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary) 0%, #ffffff 30%);
    border-radius: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 50px;
}

.phone-screen .app-logo {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    margin-bottom: 16px;
    box-shadow: 0 8px 24px rgba(0, 34, 210, 0.2);
}

.phone-screen .app-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.phone-screen .app-tagline {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 24px;
}

.phone-screen .mock-card {
    width: 85%;
    background: white;
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.phone-screen .mock-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.phone-screen .mock-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    border-radius: 50%;
}

.phone-screen .mock-lines {
    flex: 1;
}

.phone-screen .mock-line {
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    margin-bottom: 6px;
}

.phone-screen .mock-line:last-child {
    width: 60%;
    margin-bottom: 0;
}

.phone-screen .mock-btn {
    width: 100%;
    height: 36px;
    background: var(--gradient);
    border-radius: 8px;
}

.app-preview {
    width: 200px;
    height: 200px;
    border-radius: 40px;
    display: none;
}

/* Sections */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
}

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

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

.feature-card {
    padding: 32px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--primary);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 34, 210, 0.1) 0%, rgba(30, 0, 159, 0.1) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* How It Works Section */
.how-it-works {
    padding: 100px 0;
    background: var(--background-alt);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.step {
    text-align: center;
    padding: 24px;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* Instructors Section */
.instructors {
    padding: 100px 0;
    background: var(--background);
}

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

.instructors-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.instructors-text > p {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

.benefits-list {
    list-style: none;
    text-align: left;
    margin-bottom: 40px;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 1.05rem;
}

.benefits-list svg {
    width: 24px;
    height: 24px;
    color: var(--success);
    flex-shrink: 0;
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: var(--gradient);
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.cta p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

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

/* Notify Form */
.notify-form {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    max-width: 500px;
    margin: 0 auto;
}

.notify-form input[type="email"] {
    flex: 1;
    min-width: 250px;
    padding: 14px 20px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    outline: none;
}

.notify-form input[type="email"]:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.notify-privacy {
    font-size: 0.875rem !important;
    margin-top: 16px !important;
    margin-bottom: 0 !important;
    opacity: 0.8;
}

/* Footer */
.footer {
    padding: 60px 0 30px;
    background: #1f2937;
    color: white;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 100px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    margin-bottom: 16px;
}

.footer-brand p {
    color: #9ca3af;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.2s;
    white-space: nowrap;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid #374151;
    text-align: center;
}

.footer-bottom p {
    color: #6b7280;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .hero-text h1 {
        font-size: 2.5rem;
    }

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

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

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

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

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

    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
}