/* 
   TVS Xpress - Premium CSS Design System
   Modern, Clean, and Professional
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;600;800&display=swap');

:root {
    /* Color Palette */
    --primary: #0A192F;
    --primary-light: #112240;
    --accent: #FF6B35; /* Safety Orange */
    --accent-glow: rgba(255, 107, 53, 0.3);
    --secondary: #64FFDA; /* Teal Hint */
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --bg-dark: #020617;
    --bg-card: #0F172A;
    --border: rgba(148, 163, 184, 0.1);
    
    /* Layout */
    --container-xl: 1280px;
    --section-padding: 100px 5%;
    --header-height: 80px;
    
    /* Transitions */
    --t-fast: 0.2s ease;
    --t-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-xl);
    margin: 0 auto;
    width: 100%;
}

/* Glassmorphism Classes */
.glass {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    z-index: 1000;
    transition: var(--t-normal);
}

nav.scrolled {
    background: rgba(10, 25, 47, 0.9);
    box-shadow: 0 10px 30px -10px rgba(2, 6, 23, 0.5);
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.5rem;
    color: #fff;
}

.logo img {
    height: 40px;
}

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

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

.cta-btn {
    background: var(--accent);
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
    border: none;
    cursor: pointer;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--accent);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 107, 53, 0.2);
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero h1 span {
    background: linear-gradient(135deg, #fff 0%, #94A3B8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.stat-item h3 {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 4px;
}

.stat-item p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Comparison Section */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-title p {
    color: var(--text-muted);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.comp-card {
    padding: 40px;
    border-radius: 20px;
    height: 100%;
}

.comp-card h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.comp-card ul li {
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.comp-card ul li:last-child {
    border-bottom: none;
}

.comp-card .label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.comp-card .value {
    font-weight: 600;
}

.current-model {
    border: 1px solid var(--border);
}

.proposed-model {
    border: 2px solid var(--accent);
    position: relative;
    box-shadow: 0 20px 40px rgba(255, 107, 53, 0.1);
}

.proposed-model::after {
    content: 'RECOMMENDED';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 1px;
}

/* Features/Process Section */
.process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.process-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border);
    transition: var(--t-normal);
}

.process-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
}

.icon-box {
    width: 60px;
    height: 60px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 1.5rem;
    margin-bottom: 24px;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    background: var(--bg-card);
    padding: 60px;
    border-radius: 32px;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 24px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent);
}

.contact-item div h4 {
    margin-bottom: 4px;
}

.contact-item div p {
    color: var(--text-muted);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 16px;
    background: rgba(2, 6, 23, 0.5);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: #fff;
    font-family: inherit;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Footer */
footer {
    padding: 60px 5% 30px;
    border-top: 1px solid var(--border);
    margin-top: 100px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 1024px) {
    .comparison-grid, .process-grid, .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

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

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

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