/* ========================================
   CSS Variables & Reset
   ======================================== */

:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #0f3460;
    --highlight: #00d4ff;
    --text: #e4e4e4;
    --text-muted: #94a1b2;
    --success: #00b894;
    --error: #ff6b6b;
    --warning: #feca57;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
    background: var(--primary);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ========================================
   Header
   ======================================== */

.header {
    position: sticky;
    top: 0;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-sm) 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

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

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    color: var(--highlight);
}

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

.hero {
    position: relative;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    color: var(--highlight);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--highlight) 0%, #00a8ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-gradient {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

/* ========================================
   Capabilities
   ======================================== */

.capabilities {
    padding: var(--spacing-lg) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.capability-card {
    background: var(--secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.capability-card.active:hover {
    transform: translateY(-8px);
    border-color: var(--highlight);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2);
}

.capability-card.coming-soon {
    opacity: 0.6;
    cursor: default;
}

.capability-card.coming-soon:hover {
    transform: none;
    border-color: rgba(255, 255, 255, 0.05);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--accent);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--highlight);
}

.badge {
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge.live {
    background: rgba(0, 184, 148, 0.2);
    color: var(--success);
    border: 1px solid var(--success);
}

.badge:not(.live) {
    background: rgba(148, 161, 178, 0.2);
    color: var(--text-muted);
    border: 1px solid rgba(148, 161, 178, 0.3);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
}

.card-description {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
    flex-grow: 1;
}

.card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.tech-tag {
    padding: 4px 10px;
    background: var(--accent);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--highlight);
    font-weight: 500;
}

.card-footer {
    margin-top: auto;
}

.card-link {
    color: var(--highlight);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.capability-card.active:hover .card-link {
    transform: translateX(4px);
    display: inline-block;
}

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

.tech-stack {
    padding: var(--spacing-lg) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(15, 52, 96, 0.2) 100%);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.tech-category {
    background: var(--secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.tech-category-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--highlight);
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-item {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--accent);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ========================================
   Modal
   ======================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 1001;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: 6px;
}

.modal-close:hover {
    background: var(--accent);
    color: var(--text);
}

.modal-body {
    padding: var(--spacing-md);
}

.modal-subtitle {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.input-group {
    margin-bottom: var(--spacing-sm);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
    font-weight: 500;
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
}

.input-group input:focus {
    outline: none;
    border-color: var(--highlight);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--highlight) 0%, #00a8ff 100%);
    color: var(--primary);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: var(--spacing-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.status {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.status.show {
    display: block;
}

.status.error {
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

.status.success {
    background: rgba(0, 184, 148, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.status.loading {
    background: rgba(254, 202, 87, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.loader {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--highlight);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-sm);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#downloadLink {
    margin-top: var(--spacing-sm);
}

#downloadLink a {
    display: block;
    padding: 12px;
    background: var(--success);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

#downloadLink a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 184, 148, 0.3);
}

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

.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: var(--spacing-xl);
}

.footer-content {
    text-align: center;
    color: var(--text-muted);
}

.footer-content p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.footer-note {
    font-size: 0.85rem;
    opacity: 0.7;
}

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

@media (max-width: 768px) {
    .nav {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 0.85rem;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Smooth Scrolling
   ======================================== */

html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: var(--highlight);
    color: var(--primary);
}