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

:root {
    /* Primary brand colors - matching pretub.com reference website */
    --primary-color: #1e59f1;
    --primary-dark: #1347c9;
    --primary-light: #4a7af5;
    --secondary-color: #1e59f1;

    /* Accent colors */
    --accent-light: #e8eefe;
    --accent-dark: #0d2f7a;

    /* Background gradients - soft blue tones */
    --bg-gradient-start: #f0f4ff;
    --bg-gradient-end: #e0e8ff;

    /* Text colors - high contrast for accessibility */
    --text-dark: #1a1a2e;
    --text-light: #1e59f1;
    --text-muted: #48525c;

    /* Utility colors */
    --white: #ffffff;
    --card-shadow: 0 10px 40px rgba(30, 89, 241, 0.15);
    --transition: all 0.3s ease;

    /* Warning/Alert colors */
    --warning-bg: #fef3c7;
    --warning-border: #f59e0b;
    --warning-text: #92400e;
    --danger-bg: #fee2e2;
    --danger-border: #ef4444;
    --danger-text: #991b1b;
    --success-color: #10b981;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-dark);
}

.logo-icon {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    object-fit: cover;
}

.logo-text {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--primary-color);
    color: var(--white);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* Main Content */
.main-content {
    padding-top: 90px;
    min-height: 100vh;
}

/* Hero Section */
.hero {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: calc(100vh - 90px);
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.app-store-btn,
.content-card .app-store-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--text-dark);
    color: var(--white) !important;
    text-decoration: none;
    padding: 1rem 2rem;
    border-radius: 14px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.app-store-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.app-store-btn svg {
    width: 28px;
    height: 28px;
}

.rating-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 1.5rem;
    background: var(--white);
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    box-shadow: var(--card-shadow);
}

.rating-badge .stars {
    color: #fbbf24;
}

.rating-badge span {
    color: var(--text-light);
    font-size: 0.9rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-mockup {
    position: relative;
    max-width: 300px;
}

.phone-frame {
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    border-radius: 45px;
    padding: 12px;
    box-shadow:
        0 50px 100px rgba(99, 102, 241, 0.3),
        0 20px 60px rgba(0, 0, 0, 0.2);
}

.phone-screen {
    background: linear-gradient(180deg, #4a7af5 0%, #1e59f1 100%);
    border-radius: 35px;
    height: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.phone-screen::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    background: #1a1a2e;
    border-radius: 20px;
}

.phone-screen-content {
    text-align: center;
    color: white;
}

.phone-screen-content .play-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    backdrop-filter: blur(10px);
}

.phone-screen-content .play-icon svg {
    width: 35px;
    height: 35px;
    fill: white;
    margin-left: 5px;
}

.phone-screen-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.phone-screen-content p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Features Grid */
.features {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    fill: white;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

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

/* Privacy & Contact Sections */
.content-section {
    padding: 4rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.content-card {
    background: var(--white);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: var(--card-shadow);
}

.content-card h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    text-align: center;
}

.content-card h3 {
    font-size: 1.3rem;
    margin: 2rem 0 1rem;
    color: var(--primary-color);
}

.content-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-card ul {
    margin-left: 1.5rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.content-card a {
    color: var(--primary-color);
}

/* Contact Section */
.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-item {
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item svg {
    width: 50px;
    height: 50px;
    fill: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    word-break: break-all;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
}

.footer p {
    opacity: 0.8;
    font-size: 0.9rem;
}

.footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
        padding: 2rem;
    }

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

    .hero-image {
        order: -1;
    }

    .phone-mockup {
        max-width: 250px;
    }

    .phone-screen {
        height: 420px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

    .nav-links.show {
        display: flex;
    }

    .nav-links a {
        padding: 1rem;
        border-radius: 12px;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .content-card {
        padding: 2rem 1.5rem;
    }

    .content-card h2 {
        font-size: 1.8rem;
    }
}

/* Scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Notice Banner */
.notice-banner {
    background: linear-gradient(135deg, #fef3c7 0%, #fed7aa 100%);
    border: 2px solid var(--danger-border);
    border-radius: 24px;
    padding: 1.25rem 1.75rem;
    margin: 0 2rem 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.15);
    overflow: hidden;
}

.notice-banner-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.notice-icon {
    flex-shrink: 0;
    min-width: 44px;
    width: 44px;
    height: 44px;
    background: var(--danger-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.notice-icon svg {
    width: 24px;
    height: 24px;
    min-width: 24px;
    min-height: 24px;
    fill: var(--white);
}

.notice-text h3 {
    color: var(--danger-text);
    font-size: 1.1rem;
    margin-bottom: 0.35rem;
    font-weight: 600;
}

.notice-text p {
    color: var(--text-dark);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.notice-text p + p {
    margin-top: 0.35rem;
}

.notice-text a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: underline;
}

.notice-text a:hover {
    color: var(--primary-dark);
}

@media (max-width: 768px) {
    .notice-banner {
        margin: 0 1rem 1.5rem;
        padding: 1rem 1.25rem;
        border-radius: 16px;
    }

    .notice-banner-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 0.75rem;
    }

    .notice-icon {
        min-width: 40px;
        width: 40px;
        height: 40px;
    }

    .notice-icon svg {
        width: 22px;
        height: 22px;
        min-width: 22px;
        min-height: 22px;
    }

    .notice-text h3 {
        font-size: 1rem;
    }

    .notice-text p {
        font-size: 0.85rem;
    }
}