/* ============================================
   QAPlay Landing Page Styles
   Modern, Dark Theme with Glassmorphism
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-card: rgba(26, 26, 36, 0.6);
    --bg-card-hover: rgba(36, 36, 50, 0.8);

    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;

    --accent-primary: #8b5cf6;
    --accent-secondary: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --accent-glow: rgba(139, 92, 246, 0.4);

    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;

    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    /* Spacing */
    --nav-height: 72px;
    --section-padding: 120px;
    --container-max: 1200px;

    /* Effects */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --blur-amount: 20px;
    --transition-fast: 0.2s ease;
    --transition-medium: 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: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(var(--blur-amount));
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.3rem;
}

.logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.nav-cta {
    padding: 10px 24px;
    background: var(--accent-gradient);
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 4px;
    transition: var(--transition-medium);
}

/* Hamburger Animation */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}


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

.hero {
    min-height: 100vh;
    padding: calc(var(--nav-height) + 80px) 24px 80px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: hidden;
}

.hero-bg-effects {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    left: -200px;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-secondary);
    bottom: -100px;
    right: -150px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: #ec4899;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.hero-container {
    max-width: var(--container-max);
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease;
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s backwards;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease 0.3s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-medium);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px var(--accent-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
}

.btn-outline:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
}

.btn-download {
    min-width: 200px;
}

.btn-icon {
    font-size: 1.5rem;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.btn-label {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.8;
}

.btn-platform {
    font-size: 1.1rem;
    font-weight: 700;
}

.hero-version {
    font-size: 0.875rem;
    color: var(--text-muted);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-note {
    max-width: 600px;
    margin: 24px auto 8px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    animation: fadeInUp 0.8s ease 0.35s backwards;
}

.hero-note strong {
    color: var(--accent-secondary);
}

/* App Preview */
.hero-visual {
    margin-top: 60px;
    width: 100%;
    max-width: 900px;
    perspective: 1000px;
    animation: fadeInUp 1s ease 0.5s backwards;
}

.app-preview {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.05),
        0 25px 80px -20px rgba(0, 0, 0, 0.5),
        0 0 100px -20px var(--accent-glow);
    transform: rotateX(5deg);
    transition: var(--transition-medium);
}

.app-preview:hover {
    transform: rotateX(0);
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.preview-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red {
    background: #ef4444;
}

.dot.yellow {
    background: #f59e0b;
}

.dot.green {
    background: #22c55e;
}

.preview-title {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.preview-image-container {
    width: 100%;
    overflow: hidden;
    background: var(--bg-secondary);
}

.app-main-img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}


/* ============================================
   Section Commons
   ============================================ */

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

.features {
    padding: var(--section-padding) 24px;
    background: var(--bg-secondary);
    position: relative;
}

.features-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.feature-card {
    position: relative;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: var(--transition-medium);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-8px);
}

.feature-card.featured {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.05));
}

.feature-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    padding: 6px 14px;
    background: var(--accent-gradient);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

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

.feature-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feature-list li {
    position: relative;
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ============================================
   Tech Stack Section
   ============================================ */

.tech-stack {
    padding: var(--section-padding) 24px;
}

.tech-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
}

.tech-card {
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: var(--transition-medium);
}

.tech-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-5px);
}

.tech-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.tech-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.tech-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   Getting Started Section
   ============================================ */

.getting-started {
    padding: var(--section-padding) 24px;
    background: var(--bg-secondary);
}

.gs-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.step-card {
    flex: 1;
    min-width: 200px;
    max-width: 250px;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: var(--transition-medium);
}

.step-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-5px);
}

.step-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 16px;
}

.step-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.step-connector {
    width: 40px;
    height: 2px;
    background: var(--border-color);
}

.gs-cta {
    text-align: center;
    padding: 48px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.05));
    border: 1px solid var(--border-color);
    border-radius: 24px;
}

.gs-cta h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 24px;
}

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

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

.footer {
    padding: 80px 24px 32px;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 16px;
}

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

.footer-links {
    display: flex;
    gap: 64px;
    flex-wrap: wrap;
}

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

.footer-column h5 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.footer-column a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

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

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .menu-toggle {
        display: flex;
        order: -1;
        margin-right: 12px;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 40px;
        transition: var(--transition-medium);
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
        z-index: 1000;
        right: auto;
    }

    .nav-links.active {
        left: 0;
        right: auto;
    }


    .nav-links a {
        font-size: 1.2rem;
    }


    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn-download {
        width: 100%;
        max-width: 280px;
    }

    .preview-sidebar {
        display: none;
    }

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

    .steps-grid {
        flex-direction: column;
    }

    .step-connector {
        width: 2px;
        height: 24px;
    }

    .footer-main {
        flex-direction: column;
    }

    .footer-links {
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .feature-card {
        padding: 24px;
    }

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