/* 
 * Stratum Track Marketing Site
 * Custom styles extending Tailwind CSS
 */

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #18181f;
    --accent-blue: #3b82f6;
    --accent-teal: #14b8a6;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border-subtle: #1e293b;
    --border-light: #334155;
}

/* ============================================
   Base Styles
   ============================================ */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
    background-color: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}

/* Focus States */
*:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* ============================================
   Background Patterns
   ============================================ */
.bg-grid-pattern {
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 64px 64px;
}

/* ============================================
   Navigation
   ============================================ */
nav {
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Scrolled state (add via JS) */
nav.scrolled {
    background-color: rgba(10, 10, 15, 0.95);
    border-color: var(--border-light);
}

/* Mobile menu animations */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

#mobile-menu.open {
    max-height: 400px;
}

.menu-icon,
.close-icon {
    transition: opacity 0.2s ease;
}

#mobile-menu-btn.active .menu-icon {
    display: none;
}

#mobile-menu-btn.active .close-icon {
    display: block;
}

/* ============================================
   Hero Section
   ============================================ */
.hero-gradient {
    background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent);
}

/* Floating animation for decorative elements */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.float-animation {
    animation: float 6s ease-in-out infinite;
}

/* ============================================
   Cards & Containers
   ============================================ */
.glass-card {
    background: rgba(17, 17, 24, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
}

/* Feature card hover states */
.feature-card {
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, #2563eb 100%);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-light);
}

/* ============================================
   Form Elements
   ============================================ */
input[type="text"],
input[type="email"],
textarea {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ============================================
   Typography
   ============================================ */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-teal) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slide-in-left {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animation classes */
.animate-fade-in-up {
    animation: fade-in-up 0.6s ease-out forwards;
}

.animate-fade-in {
    animation: fade-in 0.6s ease-out forwards;
}

.animate-slide-in-left {
    animation: slide-in-left 0.6s ease-out forwards;
}

.animate-slide-in-right {
    animation: slide-in-right 0.6s ease-out forwards;
}

/* Staggered animation delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* Initial state for scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Steps Timeline
   ============================================ */
.steps-line {
    background: linear-gradient(90deg, 
        var(--accent-blue) 0%, 
        var(--accent-teal) 50%, 
        #a855f7 100%
    );
}

/* ============================================
   Pulse Animation (for status indicators)
   ============================================ */
@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(59, 130, 246, 0);
    }
}

.pulse-glow {
    animation: pulse-glow 2s infinite;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    /* Reduce hero heading size on mobile */
    .hero-heading {
        font-size: 2.5rem;
        line-height: 1.2;
    }
    
    /* Adjust card padding */
    .feature-card {
        padding: 1.5rem;
    }
    
    /* Stack CTA buttons */
    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    /* Further mobile adjustments */
    .section-heading {
        font-size: 1.875rem;
    }
    
    .stats-number {
        font-size: 2.5rem;
    }
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) var(--bg-primary);
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    body {
        background: white;
        color: black;
    }
    
    nav,
    .bg-grid-pattern,
    .gradient-orb {
        display: none;
    }
}