/* style.css - CASF Tech Premium Design System */

:root {
    /* Color Palette */
    --bg-base: #0a0514;
    --bg-surface: rgba(20, 15, 35, 0.6);
    --bg-surface-hover: rgba(30, 25, 55, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #a09cbb;
    
    --accent-cyan: #00f0ff;
    --accent-purple: #b026ff;
    --accent-blue: #3b82f6;
    
    --gradient-primary: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    --gradient-secondary: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    
    /* Spacing & Layout */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --container-max: 1200px;
    --section-padding: 6rem 1rem;
    
    /* Borders & Effects */
    --border-glass: 1px solid rgba(255, 255, 255, 0.08);
    --shadow-glow: 0 0 20px rgba(176, 38, 255, 0.3);
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding: var(--section-padding);
}

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

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

.section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.glass-panel {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border-glass);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
}

p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    position: relative;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--gradient-secondary);
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-primary:hover::before {
    opacity: 1;
}

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

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

.btn-outline:hover {
    background: rgba(176, 38, 255, 0.1);
    box-shadow: var(--shadow-glow);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.w-100 {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 5, 20, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: var(--border-glass);
}

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

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.brand span {
    color: var(--accent-cyan);
}

.logo-glow {
    width: 12px;
    height: 12px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-cyan);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 600;
    color: var(--text-secondary);
}

.nav-links a:hover {
    color: white;
    text-shadow: 0 0 8px rgba(255,255,255,0.5);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 5rem;
}

.hero-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(176, 38, 255, 0.15) 0%, rgba(0, 240, 255, 0.05) 50%, transparent 70%);
    z-index: -1;
    filter: blur(60px);
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 50px;
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(4rem, 8vw, 7rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Metrics */
.metrics {
    padding: 4rem 0;
    background: linear-gradient(to right, rgba(10,5,20,0), rgba(20,15,35,0.5), rgba(10,5,20,0));
    border-top: var(--border-glass);
    border-bottom: var(--border-glass);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    text-align: center;
}

.metric-number {
    font-size: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
}

/* Partners Marquee */
.partners {
    padding: 4rem 0;
    overflow: hidden;
}

.partners-title {
    text-align: center;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.marquee-container {
    width: 100%;
    display: flex;
    overflow: hidden;
    user-select: none;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: space-around;
    min-width: 100%;
    animation: scroll 20s linear infinite;
    gap: 4rem;
}

.partner-logo {
    font-size: 2rem;
    font-weight: 800;
    color: rgba(255,255,255,0.3);
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: color 0.3s;
}

.partner-logo:hover {
    color: white;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-100% - 4rem)); }
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.feature-panel {
    padding: 2rem;
    transition: transform 0.3s ease;
}

.feature-panel:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* FAQ Section */
.faq-header {
    margin-bottom: 3rem;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: var(--border-glass);
    padding: 1.5rem 0;
    cursor: pointer;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question h4 {
    font-size: 1.2rem;
    margin: 0;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--accent-cyan);
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px; /* arbitrary large enough height */
}

.faq-item.active .faq-answer p {
    margin-top: 1rem;
    margin-bottom: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-details {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-purple);
}

.contact-form-container {
    padding: 2.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(0,0,0,0.3);
    border: var(--border-glass);
    border-radius: var(--radius-sm);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
}

.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    display: inline-block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius-sm);
    text-align: center;
}

.form-message.success {
    background: rgba(46, 213, 115, 0.1);
    color: #2ed573;
    border: 1px solid rgba(46, 213, 115, 0.3);
}

.form-message.error {
    background: rgba(255, 71, 87, 0.1);
    color: #ff4757;
    border: 1px solid rgba(255, 71, 87, 0.3);
}

/* Footer */
.footer {
    border-top: var(--border-glass);
    padding: 2rem 0;
    text-align: center;
    background: rgba(10,5,20,0.8);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer .brand {
    font-size: 1.2rem;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* In a real app we'd add a hamburger menu */
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-panel {
        margin-left: 0 !important;
    }
}