/* ================================================
   SheraChat - Premium Glassmorphism Website
   Author: SheraAI Technologies by Shaheer
   Version: 1.0.0
   ================================================ */

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors - Teal Theme */
    --primary: #00BFA5;
    --primary-dark: #00897B;
    --primary-light: #64FFDA;
    --primary-glow: rgba(0, 191, 165, 0.5);
    
    /* Secondary Colors */
    --secondary: #1DE9B6;
    --accent: #26C6DA;
    --success: #00E676;
    --warning: #FFD600;
    --danger: #FF5252;
    
    /* Neutral Colors */
    --dark: #0F172A;
    --dark-light: #1E293B;
    --gray-900: #111827;
    --gray-800: #1F2937;
    --gray-700: #374151;
    --gray-600: #4B5563;
    --gray-500: #6B7280;
    --gray-400: #9CA3AF;
    --gray-300: #D1D5DB;
    --gray-200: #E5E7EB;
    --gray-100: #F3F4F6;
    --white: #FFFFFF;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-light: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00BFA5 0%, #1DE9B6 50%, #64FFDA 100%);
    --gradient-dark: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    --gradient-glow: linear-gradient(135deg, rgba(0, 191, 165, 0.3) 0%, rgba(29, 233, 182, 0.3) 100%);
    
    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 24px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--dark);
    color: var(--gray-300);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ===== Animated Background ===== */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-primary);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #1DE9B6 0%, #26C6DA 100%);
    top: 50%;
    right: -150px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #00BFA5 0%, #64FFDA 100%);
    bottom: -100px;
    left: 30%;
    animation-delay: -10s;
}

.orb-4 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #26C6DA 0%, #1DE9B6 100%);
    top: 30%;
    left: 20%;
    animation-delay: -15s;
}

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1001;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.logo-text .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 10px 20px;
    color: var(--gray-300);
    font-weight: 500;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-light);
    background: rgba(0, 191, 165, 0.1);
}

.nav-link i {
    margin-right: 6px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    background: rgba(0, 191, 165, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    z-index: 1001;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--dark);
    box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--primary-glow);
}

.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: white;
}

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

.btn-large {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* ===== Glass Card ===== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition-normal);
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 191, 165, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero-badge i {
    color: var(--primary);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    color: white;
    margin-bottom: 24px;
}

.hero-title .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-400);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 60px;
    flex-wrap: wrap;
}

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

.stat-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--gray-400);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* ===== Section Styles ===== */
.section {
    padding: var(--section-padding);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 191, 165, 0.1);
    border: 1px solid rgba(0, 191, 165, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.section-title .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1.1rem;
    color: var(--gray-400);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Features Section ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 191, 165, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 20px;
    box-shadow: 0 8px 20px var(--primary-glow);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    margin-bottom: 12px;
}

.feature-description {
    color: var(--gray-400);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== Screenshots Section ===== */
.screenshots-section {
    padding: 100px 0;
    overflow: hidden;
}

.phone-mockup {
    position: relative;
    max-width: 300px;
    margin: 0 auto;
}

.phone-frame {
    width: 100%;
    border-radius: 40px;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.5);
}

.screenshots-slider {
    display: flex;
    gap: 30px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

/* ===== Security Section ===== */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.security-card {
    text-align: center;
    padding: 40px 24px;
}

.security-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 191, 165, 0.2) 0%, rgba(29, 233, 182, 0.2) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--primary-light);
}

/* ===== Download Section ===== */
.download-section {
    padding: 100px 0;
    text-align: center;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 40px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 32px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    text-align: left;
}

.download-btn:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(0, 191, 165, 0.2);
}

.download-btn i {
    font-size: 2.5rem;
    color: var(--primary-light);
}

.download-btn .text small {
    display: block;
    font-size: 0.8rem;
    color: var(--gray-400);
}

.download-btn .text span {
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
}

/* ===== Footer ===== */
.footer {
    padding: 60px 0 30px;
    background: rgba(15, 23, 42, 0.95);
    border-top: 1px solid var(--glass-border);
}

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

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

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

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--gray-400);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-links h4 {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--gray-400);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--dark);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark);
    font-size: 1.2rem;
    box-shadow: 0 4px 20px var(--primary-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-normal);
    z-index: 99;
    cursor: pointer;
    border: none;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ===== Mobile Drawer ===== */
@media (max-width: 992px) {
    .nav-links {
        display: flex !important;
        visibility: visible !important;
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        max-width: 80vw;
        height: 100vh;
        background: #0F172A;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 80px 16px 30px;
        border-left: 2px solid var(--primary);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.8);
        transform: translateX(100%) !important;
        transition: transform 0.3s ease;
        z-index: 9999;
        overflow-y: auto;
    }
    
    .nav-links.active {
        transform: translateX(0) !important;
    }
    
    .nav-links::before {
        content: '☰ Menu';
        position: absolute;
        top: 25px;
        left: 16px;
        font-family: var(--font-display);
        font-size: 1.1rem;
        font-weight: 600;
        color: var(--primary-light);
    }
    
    .nav-links li {
        opacity: 1 !important;
        transform: none !important;
        visibility: visible !important;
        display: block;
        width: 100%;
    }
    
    .nav-link {
        display: block;
        width: 100%;
        padding: 14px;
        font-size: 1rem;
        color: white !important;
        border-radius: 8px;
        margin-bottom: 4px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-link:hover {
        background: rgba(0, 191, 165, 0.2);
    }
    
    .mobile-toggle {
        display: flex !important;
        z-index: 10001;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.3);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 9998;
    }
    
    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== Performance Optimizations ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    
    .gradient-orb {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .gradient-orb {
        animation: none !important;
        opacity: 0.3;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .stat-value {
        font-size: 2rem;
    }
}

/* GPU acceleration */
.nav-links,
.gradient-orb,
.btn,
.glass-card {
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* ===== Legal Pages ===== */
.legal-hero {
    padding: 140px 24px 60px;
    text-align: center;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

.legal-content h2 {
    font-size: 1.5rem;
    color: white;
    margin: 40px 0 16px;
}

.legal-content p,
.legal-content li {
    color: var(--gray-300);
    line-height: 1.8;
    margin-bottom: 16px;
}

.legal-content ul {
    padding-left: 24px;
    list-style: disc;
}

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

.legal-content a:hover {
    text-decoration: underline;
}