/* ========================================
   LED Banner Pro - Official Website
   Style Sheet
   ======================================== */

/* ========================================
   CSS Variables
   ======================================== */

:root {
    /* Colors */
    --color-primary: #FF1744;
    --color-primary-dark: #D50032;
    --color-primary-light: #FF616F;
    --color-secondary: #00E676;
    --color-accent: #2196F3;
    
    /* Dark Theme Colors */
    --color-bg-dark: #0A0A0A;
    --color-bg-darker: #000000;
    --color-surface-dark: #1A1A1A;
    --color-surface-light: #2A2A2A;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B3B3B3;
    --color-text-muted: #666666;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF1744 0%, #FF616F 100%);
    --gradient-dark: linear-gradient(180deg, #0A0A0A 0%, #1A1A1A 100%);
    --gradient-hero: radial-gradient(circle at top right, rgba(255, 23, 68, 0.1) 0%, transparent 50%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, 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: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 4rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(255, 23, 68, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-Index */
    --z-header: 100;
    --z-modal: 200;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

/* ========================================
   Container
   ======================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Header & Navigation
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo-icon {
    font-size: 1.5em;
}

.logo-img {
    height: 36px;
    width: auto;
    border-radius: 8px;
    flex-shrink: 0;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
}

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

.nav-cta {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    color: white !important;
    font-weight: 600;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: white !important;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    padding: 4px 0;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-base);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-bg-darker);
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-slow);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-xl {
    padding: var(--spacing-xl) var(--spacing-3xl);
    font-size: var(--font-size-xl);
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
    background: var(--gradient-hero), var(--color-bg-dark);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
}

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

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
}

.hero-cta {
    margin-bottom: var(--spacing-lg);
}

.hero-note {
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.hero-image {
    animation: fadeInRight 0.8s ease 0.2s both;
}

.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    margin: 0 auto;
    background: linear-gradient(145deg, #2A2A2A, #1A1A1A);
    border-radius: 40px;
    padding: 10px;
    box-shadow: var(--shadow-xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-bg-darker);
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.led-display-demo {
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.led-text {
    color: var(--color-primary);
    font-size: 28px;
    font-weight: bold;
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px var(--color-primary);
    white-space: nowrap;
    animation: scrollText 10s linear infinite;
}

@keyframes scrollText {
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}

@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-description {
        margin: 0 auto var(--spacing-2xl);
    }
    
    .hero-image {
        order: -1;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
}

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

.features {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-darker);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    position: relative;
    padding: var(--spacing-2xl);
    background: var(--color-surface-dark);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.feature-highlight {
    background: linear-gradient(145deg, rgba(255, 23, 68, 0.1), var(--color-surface-dark));
    border-color: rgba(255, 23, 68, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.feature-badge {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

@media (max-width: 968px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Templates Section
   ======================================== */

.templates {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-dark);
}

.templates-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.template-category {
    padding: var(--spacing-2xl);
    background: var(--color-surface-dark);
    border-radius: var(--radius-xl);
}

.category-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
}

.template-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.template-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-surface-light);
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: transform var(--transition-base), background var(--transition-base);
}

.template-item:hover {
    transform: scale(1.05);
    background: var(--color-primary);
}

.template-emoji {
    font-size: 1.25em;
}

@media (max-width: 768px) {
    .templates-showcase {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   How It Works Section
   ======================================== */

.how-it-works {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-darker);
}

.steps {
    display: flex;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
}

.step:not(:last-child)::after {
    content: '→';
    position: absolute;
    right: -20px;
    top: 40px;
    font-size: var(--font-size-2xl);
    color: var(--color-text-muted);
}

.step-number {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-xl);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.step-description {
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .steps {
        flex-direction: column;
    }
    
    .step:not(:last-child)::after {
        content: '↓';
        right: auto;
        top: auto;
        bottom: -30px;
        left: 50%;
        transform: translateX(-50%);
    }
}

/* ========================================
   Use Cases Section
   ======================================== */

.use-cases {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-dark);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.use-case {
    padding: var(--spacing-xl);
    text-align: center;
    background: var(--color-surface-dark);
    border-radius: var(--radius-xl);
    transition: transform var(--transition-base);
}

.use-case:hover {
    transform: translateY(-4px);
}

.use-case-emoji {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.use-case-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.use-case-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

@media (max-width: 968px) {
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Download Section
   ======================================== */

.download {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    text-align: center;
}

.download-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.download-description {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}

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

.download .btn-primary:hover {
    box-shadow: var(--shadow-xl);
}

.download-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    font-size: var(--font-size-sm);
}

/* ========================================
   Legal Pages (Privacy & Terms)
   ======================================== */

.legal-page {
    padding: calc(64px + var(--spacing-4xl)) 0 var(--spacing-4xl);
    background: var(--color-bg-darker);
    min-height: 100vh;
}

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

.legal-content h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.legal-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: var(--spacing-2xl) 0 var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.legal-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    color: var(--color-text-primary);
}

.legal-update {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-sm);
}

.legal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.legal-content ul {
    margin: var(--spacing-md) 0 var(--spacing-lg) var(--spacing-xl);
}

.legal-content li {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    list-style-type: disc;
    line-height: 1.6;
}

.legal-content a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

.legal-content strong {
    color: var(--color-text-primary);
}

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

.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--color-bg-darker);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-tagline {
    color: var(--color-text-secondary);
    margin-top: var(--spacing-md);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-column a {
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
}

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

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }