/* ============================================
   Modern Design System - ZEDOTECH (Fresh & Soft)
   ============================================ */

:root {
    /* Color Palette - Fresh & Soft */
    --primary-bg: #f8f9fc;
    --secondary-bg: #ffffff;

    /* Accents - Soft Gradients */
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --accent-cyan: #4facfe;
    --accent-purple: #a18cd1;
    --accent-pink: #fbc2eb;
    --accent-yellow: #fda085;

    /* Text */
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #ffffff;

    /* Glass & Cards */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.8);
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
    --card-shadow-hover: 0 20px 40px -5px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 6rem;

    /* Effects */
    --blur-sm: 10px;
    --blur-md: 20px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Base Styles
   ============================================ */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.7;
}

/* Animated Background - Soft Gradient Mesh */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: #f8f9fc;
    overflow: hidden;
}

.animated-bg::before,
.animated-bg::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s infinite alternate;
}

.animated-bg::before {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-pink), transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: -5s;
}

.animated-bg::after {
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
    bottom: -10%;
    right: -10%;
}

@keyframes float {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }

    100% {
        transform: translate(50px, 50px) rotate(10deg);
    }
}

/* ============================================
   Glass Morphism Components
   ============================================ */

.glass {
    background: var(--secondary-bg);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

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

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

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(var(--blur-md));
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
    background: rgba(102, 126, 234, 0.08);
}

.nav-link i {
    font-size: 1.1rem;
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        right: -100%;
        flex-direction: column;
        background: var(--secondary-bg);
        box-shadow: var(--card-shadow);
        padding: var(--spacing-md);
        border-radius: 20px;
        width: 85%;
        max-width: 320px;
    }

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

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

.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    position: relative;
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -1px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.6);
    padding: var(--spacing-md);
    border-radius: 24px;
    backdrop-filter: blur(10px);
}

.hero-description strong {
    color: var(--text-primary);
    font-weight: 600;
}

.hero-description ul {
    text-align: left;
    list-style: none;
    display: inline-block;
    margin: var(--spacing-md) 0;
}

.hero-description li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: 2rem;
}

.hero-description li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-size: 1.5rem;
    line-height: 1;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
    color: var(--text-light);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--secondary-bg);
    color: var(--text-primary);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
    background: var(--primary-bg);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
    color: var(--accent-primary);
}

/* ============================================
   Section Styles
   ============================================ */

.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

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

.section-title h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.tool-section {
    padding: var(--spacing-xl) var(--spacing-md) 0 var(--spacing-md);    
    position: relative;
}

.tool-section-title {
    text-align: center;
    margin-bottom: 0;
}

.tool-section-title h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.tool-section-title p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* ============================================
   Feature Cards
   ============================================ */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.feature-card {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.03);
    box-shadow: var(--card-shadow);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(79, 172, 254, 0.1));
    transition: var(--transition);
}

.feature-icon img {
    max-width: 45px;
    max-height: 45px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(79, 172, 254, 0.2));
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ============================================
   Collaboration Section
   ============================================ */

.collab-container {
    max-width: 1200px;
    margin: 0 auto;
}

.collab-item {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-xl);
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: 30px;
    box-shadow: var(--card-shadow);
}

.collab-item:nth-child(even) {
    direction: rtl;
}

.collab-item:nth-child(even)>* {
    direction: ltr;
}

.collab-content {
    padding: var(--spacing-sm);
}

.collab-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.collab-icon i {
    font-size: 1.8rem;
    color: var(--text-light);
}

.collab-content h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 700;
}

.collab-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
}

.collab-content ul {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.collab-content li {
    padding: 0.5rem 0;
    color: var(--text-primary);
    position: relative;
    padding-left: 2rem;
    font-weight: 500;
}

.collab-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 800;
}

.collab-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.collab-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.collab-image:hover img {
    transform: scale(1.03);
}

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

.footer {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.9rem;
}

.footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--accent-secondary);
}

/* ============================================
   Scroll to Top Button
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--secondary-bg);
    color: var(--accent-primary);
    border: 1px solid rgba(0, 0, 0, 0.05);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    background: var(--accent-primary);
    color: var(--text-light);
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.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);
}

.mb-5 {
    margin-bottom: var(--spacing-xl);
}

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

@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .collab-item {
        grid-template-columns: 1fr;
    }

    .collab-item:nth-child(even) {
        direction: ltr;
    }
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.collab-content h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 700;
}

.collab-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
}

.collab-content ul {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.collab-content li {
    padding: 0.5rem 0;
    color: var(--text-primary);
    position: relative;
    padding-left: 2rem;
    font-weight: 500;
}

.collab-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 800;
}

.collab-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.collab-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.collab-image:hover img {
    transform: scale(1.03);
}

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

.footer {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.9rem;
}

.footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--accent-secondary);
}

/* ============================================
   Scroll to Top Button
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--secondary-bg);
    color: var(--accent-primary);
    border: 1px solid rgba(0, 0, 0, 0.05);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    background: var(--accent-primary);
    color: var(--text-light);
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.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);
}

.mb-5 {
    margin-bottom: var(--spacing-xl);
}

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

@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .collab-item {
        grid-template-columns: 1fr;
    }

    .collab-item:nth-child(even) {
        direction: ltr;
    }
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeIn 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Stagger animations */
.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.15s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.25s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(6) {
    animation-delay: 0.35s;
}

.feature-card:nth-child(7) {
    animation-delay: 0.4s;
}

.feature-card:nth-child(8) {
    animation-delay: 0.45s;
}

/* ============================================
   YouTube Section
   ============================================ */

.youtube-container {
    max-width: 900px;
    margin: 0 auto;
}

.youtube-card {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: 30px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

.youtube-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.youtube-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #FF0000;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 10px 20px rgba(255, 0, 0, 0.2);
}

.youtube-info {
    flex: 1;
}

.youtube-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.youtube-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.btn-youtube {
    background: #FF0000;
    color: white;
    border: none;
}

.btn-youtube:hover {
    background: #cc0000;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 0, 0, 0.3);
}

.video-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #2d3748, #1a202c);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/youtube-bg.jpg') center/cover no-repeat;
    opacity: 0.3;
    transition: var(--transition);
}

.video-placeholder:hover::before {
    transform: scale(1.05);
    opacity: 0.4;
}

.play-button {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
    border: 2px solid rgba(255, 255, 255, 0.5);
    z-index: 1;
}

.video-placeholder:hover .play-button {
    transform: scale(1.1);
    background: #FF0000;
    border-color: #FF0000;
}

.video-placeholder p {
    z-index: 1;
    font-weight: 500;
    opacity: 0.9;
}

@media (max-width: 600px) {
    .youtube-header {
        flex-direction: column;
        text-align: center;
    }

    .youtube-info {
        width: 100%;
    }

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