/* ===================================
   Bingo Mania - Styles
   Vibrant Bingo-themed Design
   =================================== */

:root {
    /* Bingo Color Palette */
    --primary-red: #FF4757;
    --primary-blue: #3742FA;
    --primary-yellow: #FFA502;
    --primary-green: #2ED573;
    --primary-purple: #A55EEA;

    /* Neutral Colors */
    --dark: #2F3542;
    --dark-gray: #57606F;
    --light-gray: #F1F2F6;
    --white: #FFFFFF;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-purple) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    --gradient-rainbow: linear-gradient(90deg, var(--primary-red), var(--primary-yellow), var(--primary-green), var(--primary-blue), var(--primary-purple));

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* ===================================
   Navigation
   =================================== */

.navbar {
    background: var(--white);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    transition: color 0.3s;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    background: linear-gradient(135deg, #667EEA 0%, #764BA2 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 2;
}

.bingo-badge {
    display: inline-block;
    background: var(--primary-yellow);
    color: var(--dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-icon {
    font-size: 1.25rem;
}

.btn-primary {
    background: var(--primary-red);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(255, 71, 87, 0.4);
}

.btn-primary:hover {
    background: #ff3347;
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 71, 87, 0.5);
}

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

.btn-secondary:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-md);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-yellow);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Bingo Balls Animation */
.bingo-balls-container {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.bingo-ball {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.bingo-ball span {
    font-size: 2rem;
}

.ball-red { background: var(--primary-red); animation-delay: 0s; }
.ball-blue { background: var(--primary-blue); animation-delay: 0.2s; }
.ball-yellow { background: var(--primary-yellow); color: var(--dark); animation-delay: 0.4s; }
.ball-green { background: var(--primary-green); animation-delay: 0.6s; }
.ball-purple { background: var(--primary-purple); animation-delay: 0.8s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* Floating Decorations */
.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.floating-ball {
    position: absolute;
    font-size: 3rem;
    opacity: 0.3;
    animation: floatRandom 15s infinite ease-in-out;
}

.floating-ball.ball-1 { top: 10%; left: 10%; animation-duration: 12s; }
.floating-ball.ball-2 { top: 20%; right: 15%; animation-duration: 15s; }
.floating-ball.ball-3 { bottom: 20%; left: 20%; animation-duration: 18s; }
.floating-ball.ball-4 { bottom: 30%; right: 10%; animation-duration: 14s; }
.floating-ball.ball-5 { top: 50%; left: 50%; animation-duration: 20s; }

@keyframes floatRandom {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -20px) rotate(90deg); }
    50% { transform: translate(-20px, 20px) rotate(180deg); }
    75% { transform: translate(20px, 20px) rotate(270deg); }
}

/* ===================================
   Features Section
   =================================== */

.features {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--dark);
}

.section-header p {
    font-size: 1.15rem;
    color: var(--dark-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

.feature-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* ===================================
   How It Works Section
   =================================== */

.how-it-works {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.step-number {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

.step-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

.step-content p {
    color: var(--dark-gray);
}

/* ===================================
   Download Section
   =================================== */

.download-section {
    padding: var(--spacing-xl) 0;
    background: var(--gradient-secondary);
    color: var(--white);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.download-text h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.download-text p {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.download-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.download-features li {
    font-size: 1.1rem;
    padding: var(--spacing-xs) 0;
    font-weight: 600;
}

.btn-download {
    background: var(--white);
    color: var(--primary-blue);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1.25rem 2.5rem;
    font-size: 1.15rem;
}

.btn-download:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.download-note {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Phone Mockup */
.phone-mockup {
    width: 300px;
    height: 600px;
    background: var(--dark);
    border-radius: 40px;
    padding: 15px;
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-purple) 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-preview {
    text-align: center;
    color: var(--white);
}

.app-preview h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--dark);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-yellow);
}

.footer-section p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.8;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary-yellow);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.7;
}

.footer-disclaimer {
    font-size: 0.85rem;
    color: var(--primary-yellow);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 968px) {
    .hero-content,
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .nav-links {
        gap: var(--spacing-sm);
    }

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

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

    .bingo-balls-container {
        margin-top: var(--spacing-md);
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
    }

    .logo h1 {
        font-size: 1.25rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

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

    .bingo-ball {
        width: 80px;
        height: 80px;
        font-size: 1.25rem;
    }

    .bingo-ball span {
        font-size: 1.5rem;
    }

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

/* ===================================
   Utility Classes
   =================================== */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }