/**
 * Enhanced UI Styles
 * Modern, polished design improvements for the entire site
 */

/* ============================================
   ENHANCED COLOR PALETTE
   ============================================ */
:root {
    /* Primary Colors - Modern Purple/Blue Gradient */
    --primary-gradient-start: #6366f1;
    --primary-gradient-end: #8b5cf6;
    --primary-dark: #4f46e5;
    --primary-light: #a78bfa;

    /* Accent Colors */
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #06b6d4;

    /* Neutral Colors */
    --neutral-50: #f9fafb;
    --neutral-100: #f3f4f6;
    --neutral-200: #e5e7eb;
    --neutral-300: #d1d5db;
    --neutral-700: #374151;
    --neutral-800: #1f2937;
    --neutral-900: #111827;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Animations */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   ENHANCED TYPOGRAPHY
   ============================================ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.011em;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.display-1, .display-2, .display-3, .display-4 {
    font-weight: 800;
    letter-spacing: -0.04em;
}

.lead {
    font-size: 1.125rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--neutral-700);
}

/* ============================================
   ENHANCED HERO SECTION
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--primary-gradient-start) 0%, var(--primary-gradient-end) 100%);
    padding: 8rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #fff, rgba(255, 255, 255, 0.9));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.hero-section .lead {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

/* ============================================
   ENHANCED CARDS
   ============================================ */
.feature-card {
    background: #fff;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--neutral-200);
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary-gradient-start), var(--primary-gradient-end));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover::before {
    opacity: 1;
}

/* Glass Card Effect */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* ============================================
   ENHANCED BUTTONS
   ============================================ */
.btn {
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    border: none;
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: 1rem;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-color: #fff;
}

/* ============================================
   ENHANCED ICON WRAPPERS
   ============================================ */
.icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.icon-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.icon-wrapper:hover::before {
    opacity: 1;
}

.icon-wrapper.primary {
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.icon-wrapper.stage1 {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.icon-wrapper.stage2 {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.icon-wrapper.stage3 {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ============================================
   ENHANCED STATS STRIP
   ============================================ */
.stats-strip {
    background: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 100%);
    padding: 3rem 0;
    margin-top: -3rem;
    position: relative;
    z-index: 1;
}

.stat-item {
    padding: 1.5rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.stat-icon {
    font-size: 2rem;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}

.stat-text h6 {
    color: #fff;
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.stat-text p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin: 0;
}

/* ============================================
   ENHANCED SECTIONS
   ============================================ */
.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--neutral-700);
    margin-bottom: 3rem;
}

.bg-light-gradient {
    background: linear-gradient(180deg, var(--neutral-50) 0%, #fff 100%);
}

.bg-dark-gradient {
    background: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 100%);
}

/* ============================================
   ENHANCED BADGES
   ============================================ */
.stage-badge {
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-block;
    box-shadow: var(--shadow-sm);
}

.stage-badge.stage1 {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
}

.stage-badge.stage2 {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.stage-badge.stage3 {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
}

/* ============================================
   ENHANCED TABLES
   ============================================ */
.table {
    border-collapse: separate;
    border-spacing: 0;
}

.table thead th {
    background: linear-gradient(135deg, var(--neutral-100), var(--neutral-50));
    border: none;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--neutral-700);
    padding: 1rem;
}

.table tbody tr {
    transition: all var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--neutral-50);
    transform: scale(1.01);
    box-shadow: var(--shadow-md);
}

.table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--neutral-200);
}

/* ============================================
   ENHANCED FORMS
   ============================================ */
.form-control {
    border-radius: 0.75rem;
    border: 2px solid var(--neutral-200);
    padding: 0.75rem 1rem;
    transition: all var(--transition-base);
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--primary-gradient-start);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--neutral-700);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

/* ============================================
   ENHANCED ALERTS
   ============================================ */
.alert {
    border-radius: 1rem;
    border: none;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-md);
}

.alert-info {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(6, 182, 212, 0.05));
    color: #0e7490;
    border-left: 4px solid #06b6d4;
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
    color: #92400e;
    border-left: 4px solid #f59e0b;
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    color: #065f46;
    border-left: 4px solid #10b981;
}

.alert-secondary {
    background: linear-gradient(135deg, var(--neutral-100), var(--neutral-50));
    color: var(--neutral-700);
    border-left: 4px solid var(--neutral-300);
}

/* ============================================
   ENHANCED NAVBAR
   ============================================ */
.navbar {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(31, 41, 55, 0.95) !important;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-light);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* ============================================
   ENHANCED FOOTER
   ============================================ */
.footer {
    background: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 100%);
    padding: 4rem 0 2rem;
    margin-top: 5rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.footer h5, .footer h6 {
    color: #fff;
    font-weight: 700;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-block;
}

.footer a:hover {
    color: #fff;
    padding-left: 0.5rem;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.reveal {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.reveal.active {
    opacity: 1;
}

.reveal-delay-1 { animation-delay: 0.1s; }
.reveal-delay-2 { animation-delay: 0.2s; }
.reveal-delay-3 { animation-delay: 0.3s; }

/* ============================================
   ENHANCED PROGRESS BARS
   ============================================ */
.progress {
    height: 0.75rem;
    border-radius: 1rem;
    background: var(--neutral-200);
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.3);
    transition: width var(--transition-slow);
}

/* ============================================
   ENHANCED CODE BLOCKS
   ============================================ */
code {
    background: var(--neutral-100);
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.875em;
    color: var(--primary-dark);
    font-weight: 600;
}

pre code {
    background: transparent;
    padding: 0;
}

pre {
    background: var(--neutral-900);
    color: #fff;
    padding: 1.5rem;
    border-radius: 1rem;
    overflow-x: auto;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================
   ENHANCED WORKFLOW VISUALIZER
   ============================================ */
.wf-step {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
}

.wf-step:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.wf-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

/* ============================================
   RESPONSIVE ENHANCEMENTS
   ============================================ */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .icon-wrapper {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.shadow-soft {
    box-shadow: var(--shadow-md);
}

.shadow-strong {
    box-shadow: var(--shadow-xl);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}