/* Modern CSS Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* CSS Variables */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #4facfe;
    --warning-color: #43e97b;
    --danger-color: #fa709a;
    --dark-color: #2d3748;
    --light-color: #f7fafc;
    --white: #ffffff;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-300: #e2e8f0;
    --gray-400: #cbd5e0;
    --gray-500: #a0aec0;
    --gray-600: #718096;
    --gray-700: #4a5568;
    --gray-800: #2d3748;
    --gray-900: #1a202c;
    
    --font-family: 'Tajawal', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    --border-radius-sm: 0.375rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: var(--font-size-2xl);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-8);
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    z-index: -2;
}

.hero-background::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="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-particles {
    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 1000 1000"><circle cx="100" cy="100" r="2" fill="rgba(255,255,255,0.3)"/><circle cx="300" cy="200" r="1" fill="rgba(255,255,255,0.2)"/><circle cx="500" cy="150" r="1.5" fill="rgba(255,255,255,0.4)"/><circle cx="700" cy="300" r="1" fill="rgba(255,255,255,0.3)"/><circle cx="900" cy="250" r="2" fill="rgba(255,255,255,0.2)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
    padding: var(--spacing-20) 0;
}

.hero-text {
    color: white;
}

.hero-title {
    margin-bottom: var(--spacing-6);
}

.title-main {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-2);
    background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 400;
    opacity: 0.9;
}

.hero-description {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--spacing-8);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--border-radius-xl);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.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 ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%);
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    position: relative;
}

.floating-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    color: white;
    animation: floatCard 6s ease-in-out infinite;
    box-shadow: var(--shadow-xl);
}

.floating-card:nth-child(2) {
    animation-delay: -2s;
    margin-right: var(--spacing-8);
}

.floating-card:nth-child(3) {
    animation-delay: -4s;
    margin-right: var(--spacing-16);
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.floating-card i {
    font-size: var(--font-size-2xl);
    opacity: 0.9;
}

.floating-card span {
    font-weight: 600;
}

/* Stats Section */
.stats {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--spacing-16) 0;
    margin-top: -var(--spacing-20);
    position: relative;
    z-index: 10;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-8);
}

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

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: var(--spacing-2);
}

.stat-label {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    font-weight: 500;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--gray-800);
    margin-bottom: var(--spacing-4);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-2);
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Apps Section */
.apps-section {
    background: var(--white);
    padding: var(--spacing-20) 0;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-16);
}

.app-card {
    background: var(--white);
    border-radius: var(--border-radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.app-card.featured {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.app-card.featured .app-title,
.app-card.featured .app-description {
    color: white;
}

.app-card.new::after {
    content: 'جديد';
    position: absolute;
    top: var(--spacing-4);
    left: var(--spacing-4);
    background: var(--danger-color);
    color: white;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 700;
}

.app-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-6);
    color: white;
    font-size: var(--font-size-2xl);
}

.app-card.featured .app-icon {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.app-content {
    flex: 1;
}

.app-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-3);
}

.app-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
}

.app-tags {
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-6);
}

.tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.app-card.featured .tag {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.app-link {
    position: absolute;
    top: var(--spacing-6);
    left: var(--spacing-6);
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    text-decoration: none;
    transition: all 0.3s ease;
}

.app-link:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.app-card.featured .app-link {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Tools Section */
.tools-section {
    background: var(--gray-50);
    padding: var(--spacing-20) 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-8);
}

.tool-card {
    background: var(--white);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.tool-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.tool-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.tool-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.tool-content {
    padding: var(--spacing-6);
}

/* Calculator Styles */
.calculator {
    max-width: 300px;
    margin: 0 auto;
}

.calc-display {
    width: 100%;
    padding: var(--spacing-4);
    background: var(--gray-800);
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-xl);
    text-align: left;
    margin-bottom: var(--spacing-4);
    font-family: 'Courier New', monospace;
}

.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2);
}

.calc-btn {
    padding: var(--spacing-4);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--gray-100);
    color: var(--gray-800);
}

.calc-btn:hover {
    background: var(--gray-200);
    transform: scale(1.05);
}

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

.calc-btn.operator:hover {
    background: var(--secondary-color);
}

.calc-btn.equals {
    background: var(--success-color);
    color: white;
    grid-row: span 2;
}

.calc-btn.equals:hover {
    background: #3a8bfd;
}

.calc-btn.clear {
    background: var(--danger-color);
    color: white;
}

.calc-btn.clear:hover {
    background: #f56565;
}

.calc-btn.zero {
    grid-column: span 2;
}

/* Converter Styles */
.converter,
.electrical-calc {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.input-group label {
    font-weight: 600;
    color: var(--gray-700);
}

.input-group input,
.input-group select {
    padding: var(--spacing-3);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Clock Styles */
.clock {
    text-align: center;
}

.time-display {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-2);
    font-family: 'Courier New', monospace;
}

.date-display {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
}

/* Quick Tools Styles */
.quick-tools {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-3);
}

.quick-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.quick-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quick-btn i {
    font-size: var(--font-size-xl);
}

/* Notes Styles */
.notes textarea {
    width: 100%;
    height: 120px;
    padding: var(--spacing-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    resize: vertical;
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
}

.notes textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.notes-actions {
    display: flex;
    gap: var(--spacing-3);
    margin-top: var(--spacing-4);
}

.notes-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--gray-100);
    color: var(--gray-700);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.notes-btn:hover {
    background: var(--gray-200);
}

/* Social Section */
.social-section {
    background: var(--white);
    padding: var(--spacing-20) 0;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
}

.social-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    background: var(--white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.social-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.social-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: white;
}

.social-card.tiktok .social-icon {
    background: linear-gradient(135deg, #ff0050, #000000);
}

.social-card.youtube .social-icon {
    background: linear-gradient(135deg, #ff0000, #cc0000);
}

.social-card.twitter .social-icon {
    background: linear-gradient(135deg, #1da1f2, #0d8bd9);
}

.social-card.instagram .social-icon {
    background: linear-gradient(135deg, #e4405f, #833ab4, #fcb045);
}

.social-card.linkedin .social-icon {
    background: linear-gradient(135deg, #0077b5, #005885);
}

.social-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-1);
}

.social-content p {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

/* Websites Section */
.websites-section {
    background: var(--gray-50);
    padding: var(--spacing-20) 0;
}

.websites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-6);
}

.website-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    background: var(--white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.website-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.website-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: white;
}

.website-content {
    flex: 1;
}

.website-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-1);
}

.website-content p {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

.website-arrow {
    color: var(--gray-400);
    font-size: var(--font-size-lg);
    transition: all 0.3s ease;
}

.website-card:hover .website-arrow {
    color: var(--primary-color);
    transform: translateX(-4px);
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: white;
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-8);
}

.footer-brand {
    max-width: 400px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
}

.brand-logo i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

.footer-brand p {
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-8);
}

.link-group h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: white;
}

.link-group a {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    margin-bottom: var(--spacing-2);
    transition: color 0.3s ease;
}

.link-group a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: var(--spacing-6);
    left: var(--spacing-6);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--border-radius-2xl);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-2xl);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-4);
}

.modal-body {
    margin-bottom: var(--spacing-6);
    color: var(--gray-600);
}

.modal-close {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-8);
    }
    
    .title-main {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .apps-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .social-grid {
        grid-template-columns: 1fr;
    }
    
    .websites-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .calc-buttons {
        gap: var(--spacing-1);
    }
    
    .calc-btn {
        padding: var(--spacing-3);
        font-size: var(--font-size-base);
    }
    
    .quick-tools {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .nav-container {
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .hero-content {
        padding: var(--spacing-12) 0;
    }
    
    .title-main {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .app-card,
    .tool-card,
    .social-card,
    .website-card {
        padding: var(--spacing-4);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-300);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }