/* PetGuard AI Website Styles */

/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #10b981;
    --primary-dark: #059669;
    --primary-darker: #047857;
    --secondary-color: #667eea;
    --secondary-dark: #764ba2;
    --text-primary: #1a202c;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background-white: rgba(255, 255, 255, 0.95);
    --background-glass: rgba(255, 255, 255, 0.9);
    --shadow-light: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 12px 40px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 20px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 20px;
    --border-radius-small: 8px;
    --transition: all 0.3s ease;
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== MODERN SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-darker));
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
    font-family: var(--font-heading);
}

/* ===== HEADER ===== */
header {
    background: var(--background-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-light);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover {
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-links a:hover::after {
    width: 80%;
}

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

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    font-family: var(--font-heading);
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    background: var(--background-white);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary-color);
    padding: 15px 25px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    min-width: 200px;
    box-shadow: var(--shadow-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.download-btn:hover::before {
    left: 100%;
}

.download-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-heavy);
    background: rgba(255, 255, 255, 1);
}

.download-btn i {
    font-size: 2rem;
    margin-right: 15px;
}

.download-btn .btn-text {
    text-align: left;
}

.download-btn .btn-text .main {
    font-size: 1.1rem;
    font-weight: 600;
}

.download-btn .btn-text .sub {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: 80px 0;
    background: var(--background-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.02) 0%, rgba(5, 150, 105, 0.02) 100%);
    z-index: -1;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--background-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-heavy);
    background: rgba(255, 255, 255, 1);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-family: var(--font-heading);
}

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

/* ===== SCREENSHOTS SECTION ===== */
.screenshots {
    padding: 80px 0;
    background: var(--background-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: relative;
}

.screenshots::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.02) 0%, rgba(118, 75, 162, 0.02) 100%);
    z-index: -1;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.screenshot-card {
    background: var(--background-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.screenshot-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-heavy);
    background: rgba(255, 255, 255, 1);
}

.screenshot-placeholder {
    height: 500px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    position: relative;
    overflow: hidden;
}

.screenshot-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.screenshot-caption {
    padding: 1.5rem;
    text-align: center;
}

.screenshot-caption h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
}

.screenshot-caption p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== STATS SECTION ===== */
.stats {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
}

.stat-item p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== REVIEWS SECTION ===== */
.reviews {
    padding: 80px 0;
    background: var(--background-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.review-card {
    background: var(--background-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.stars {
    color: #fbbf24;
    margin-right: 1rem;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.review-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== BLOG SECTION ===== */
.blog {
    padding: 80px 0;
    background: var(--background-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.blog-card {
    background: var(--background-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.blog-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: var(--transition);
}

.blog-card:hover .blog-image img {
    transform: scale(1.05);
}

.blog-content {
    padding: 2rem;
}

.blog-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-family: var(--font-heading);
}

.blog-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.blog-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.blog-link:hover {
    color: var(--primary-dark);
}

.blog-link::after {
    content: '→';
    margin-left: 0.5rem;
    transition: var(--transition);
}

.blog-link:hover::after {
    transform: translateX(3px);
}

/* ===== FOOTER ===== */
footer {
    background: linear-gradient(135deg, var(--text-primary) 0%, #374151 100%);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    font-family: var(--font-heading);
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--background-white);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-light);
    }

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

    .mobile-menu {
        display: block;
    }

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

    .hero p {
        font-size: 1.1rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .features-grid,
    .screenshots-grid,
    .reviews-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

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

    .section-title {
        font-size: 1.8rem;
    }

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