/* ===================================
   KEVBRO - Main Stylesheet
   Professional AI Video Background Replacement
   =================================== */

/* ===================================
   CSS Variables & Theme
   =================================== */
:root {
    /* Primary Colors */
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-500: #6366F1;
    --primary-400: #818CF8;

    /* Secondary Colors */
    --secondary-600: #7C3AED;
    --secondary-700: #6D28D9;
    --secondary-500: #8B5CF6;

    /* Accent Colors */
    --accent-pink: #EC4899;
    --accent-orange: #F59E0B;
    --accent-green: #10B981;
    --accent-teal: #14B8A6;
    --accent-red: #EF4444;
    --accent-cyan: #06B6D4;
    --accent-emerald: #059669;
    --accent-amber: #F59E0B;
    --accent-violet: #7C3AED;

    /* Neutral Colors */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Semantic Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;

    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-dark: #0F172A;
    --bg-dark-lighter: #1E293B;

    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-light: #F9FAFB;
    --text-light-secondary: #D1D5DB;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --spacing-4xl: 8rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 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);

    /* Transitions */
    --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);

    /* Container Width */
    --container-max-width: 1280px;
    --container-padding: 2rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.01em;
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 600;
}

h5 {
    font-size: 1.125rem;
    font-weight: 600;
}

h6 {
    font-size: 1rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================
   Layout & Container
   =================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--spacing-4xl) 0;
    position: relative;
    overflow: hidden;
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-3xl) 0;
    }
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex: 1;
    justify-content: center;
}

.nav-menu li a {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--text-primary);
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-base);
}

.nav-menu li a:hover {
    color: var(--primary-600);
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-600), var(--secondary-600));
    transition: width var(--transition-base);
}

.nav-menu li a:hover::after {
    width: 100%;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 1.5rem;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
}

@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: white;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: var(--shadow-xl);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-cta .btn {
        display: none;
    }
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
}

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

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover {
    border-color: var(--primary-600);
    color: var(--primary-600);
    background: var(--gray-50);
}

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

.btn-full {
    width: 100%;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding-top: calc(73px + var(--spacing-4xl));
    padding-bottom: var(--spacing-4xl);
    background: linear-gradient(135deg, #F0F4FF 0%, #E8EDFF 100%);
    position: relative;
}

.hero-background-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(79, 70, 229, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.hero-badge svg {
    width: 16px;
    height: 16px;
}

.hero h1 {
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-600);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-features-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-check {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

.hero-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-illustration {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 2rem;
    box-shadow: var(--shadow-2xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.hero-video-placeholder {
    background: var(--gray-800);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
}

.video-interface {
    background: var(--gray-900);
    border-radius: var(--radius-lg);
    padding: 1rem;
}

.video-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.control-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.control-btn:hover {
    transform: scale(1.1);
}

.timeline-bar {
    flex: 1;
    height: 4px;
    background: var(--gray-700);
    border-radius: var(--radius-full);
    position: relative;
    overflow: hidden;
}

.timeline-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 45%;
    background: linear-gradient(90deg, var(--primary-600), var(--secondary-600));
    border-radius: var(--radius-full);
}

.time-display {
    font-size: 0.875rem;
    color: var(--gray-400);
    font-family: 'Courier New', monospace;
    min-width: 80px;
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 640px) {
    .hero {
        padding-top: calc(73px + var(--spacing-3xl));
    }

    .hero-stats {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }
}

/* ===================================
   Trusted By Section
   =================================== */
.trusted-by {
    padding: var(--spacing-2xl) 0;
    background: white;
    border-bottom: 1px solid var(--gray-200);
}

.trusted-label {
    text-align: center;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.trust-badges {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.badge-item {
    opacity: 0.6;
    transition: opacity var(--transition-base);
}

.badge-item:hover {
    opacity: 1;
}

@media (max-width: 768px) {
    .trust-badges {
        gap: 2rem;
    }
}

/* ===================================
   Value Proposition Section
   =================================== */
.value-proposition {
    background: white;
}

.section-header {
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-header.centered {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-top: 1rem;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.value-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
}

.value-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.value-card.highlight {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(124, 58, 237, 0.05));
    border-color: var(--primary-300);
}

.value-icon {
    margin-bottom: 1.5rem;
}

.value-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.value-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '→';
    color: var(--primary-600);
    font-weight: 700;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .value-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Dark Section Styles
   =================================== */
.dark-section {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1f35 100%);
    color: var(--text-light);
}

.dark-section h1,
.dark-section h2,
.dark-section h3,
.dark-section h4,
.dark-section h5,
.dark-section h6 {
    color: var(--text-light);
}

.dark-section p {
    color: var(--text-light-secondary);
}

.dark-section .section-header.light .section-description {
    color: var(--text-light-secondary);
}

/* ===================================
   Technology Section
   =================================== */
.technology-section {
    position: relative;
}

.tech-showcase {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.tech-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.tech-feature.reverse {
    direction: rtl;
}

.tech-feature.reverse > * {
    direction: ltr;
}

.tech-badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(79, 70, 229, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary-400);
    margin-bottom: 1rem;
}

.tech-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.tech-content p {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--text-light-secondary);
    margin-bottom: 2rem;
}

.tech-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.spec-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 1rem;
}

.spec-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-400);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.spec-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
}

.tech-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.detail-box h4 {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
}

.detail-box p {
    font-size: 0.9375rem;
    color: var(--text-light-secondary);
    margin: 0;
}

.tech-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-400);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-light-secondary);
}

.tech-note {
    font-size: 0.9375rem;
    color: var(--text-light-secondary);
    font-style: italic;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--primary-500);
    border-radius: var(--radius-md);
}

.optimization-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.optimization-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.opt-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-lg);
    background: rgba(79, 70, 229, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-400);
    flex-shrink: 0;
}

.opt-content h4 {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.opt-content p {
    font-size: 0.9375rem;
    color: var(--text-light-secondary);
    margin: 0;
}

.tech-visual {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-visual svg {
    width: 100%;
    height: auto;
    max-width: 500px;
}

@media (max-width: 1024px) {
    .tech-feature {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .tech-feature.reverse {
        direction: ltr;
    }

    .tech-specs {
        grid-template-columns: 1fr;
    }

    .tech-metrics {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Features Section
   =================================== */
.features-section {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-icon.blue {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-600);
}

.feature-icon.purple {
    background: rgba(124, 58, 237, 0.1);
    color: var(--secondary-600);
}

.feature-icon.pink {
    background: rgba(236, 72, 153, 0.1);
    color: var(--accent-pink);
}

.feature-icon.green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
}

.feature-icon.orange {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-orange);
}

.feature-icon.indigo {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-500);
}

.feature-icon.teal {
    background: rgba(20, 184, 166, 0.1);
    color: var(--accent-teal);
}

.feature-icon.red {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

.feature-icon.violet {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-violet);
}

.feature-icon.amber {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-amber);
}

.feature-icon.cyan {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
}

.feature-icon.emerald {
    background: rgba(5, 150, 105, 0.1);
    color: var(--accent-emerald);
}

.feature-card h3 {
    font-size: 1.375rem;
    margin-bottom: 1rem;
}

.feature-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.feature-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.detail-item svg {
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Use Cases Section
   =================================== */
.use-cases-section {
    position: relative;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
}

.use-case-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    transition: all var(--transition-base);
}

.use-case-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-4px);
}

.use-case-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.use-case-icon {
    flex-shrink: 0;
}

.use-case-header h3 {
    font-size: 1.75rem;
    color: var(--text-light);
    margin: 0;
}

.use-case-description {
    font-size: 1.0625rem;
    color: var(--text-light-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.use-case-features h4 {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.use-case-features ul {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.use-case-features ul li {
    color: var(--text-light-secondary);
    line-height: 1.7;
    padding-left: 1.5rem;
    position: relative;
}

.use-case-features ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-400);
    font-weight: 700;
}

.use-case-features ul li strong {
    color: var(--text-light);
    font-weight: 600;
}

.use-case-benefits {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.benefit-badge {
    padding: 0.5rem 1rem;
    background: rgba(79, 70, 229, 0.2);
    border: 1px solid rgba(79, 70, 229, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary-300);
}

@media (max-width: 768px) {
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Integrations Section
   =================================== */
.integrations-section {
    background: white;
}

.integrations-category {
    margin-bottom: 4rem;
}

.integrations-category:last-child {
    margin-bottom: 0;
}

.category-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.category-title svg {
    color: var(--primary-600);
    flex-shrink: 0;
}

.integration-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.integration-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
}

.integration-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.integration-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    margin-bottom: 1.5rem;
}

.integration-card h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.integration-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.integration-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.integration-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.integration-features li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
    flex-shrink: 0;
}

.integration-note {
    display: flex;
    gap: 1.5rem;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(124, 58, 237, 0.05));
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-top: 3rem;
}

.note-icon {
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-lg);
    background: var(--primary-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-600);
}

.note-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.note-content p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.7;
}

@media (max-width: 768px) {
    .integration-grid {
        grid-template-columns: 1fr;
    }

    .integration-note {
        flex-direction: column;
    }
}

/* ===================================
   Specifications Section
   =================================== */
.specifications-section {
    position: relative;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.spec-category {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.spec-category h3 {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.spec-list .spec-item {
    background: transparent;
    border: none;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-list .spec-item:last-child {
    border-bottom: none;
}

.spec-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-400);
    margin-bottom: 0.5rem;
}

.spec-list .spec-value {
    font-size: 0.9375rem;
    color: var(--text-light-secondary);
}

@media (max-width: 768px) {
    .specs-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    background: var(--bg-secondary);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    position: sticky;
    top: 120px;
}

.contact-description {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-detail-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.detail-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-600);
    flex-shrink: 0;
}

.detail-content {
    flex: 1;
}

.detail-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.detail-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.detail-value a {
    color: var(--primary-600);
}

.detail-value a:hover {
    text-decoration: underline;
}

.trust-indicators {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(124, 58, 237, 0.05));
    border-radius: var(--radius-lg);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.trust-item svg {
    flex-shrink: 0;
}

.contact-form-container {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    padding: 3rem;
    box-shadow: var(--shadow-xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    background: white;
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-custom {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    position: relative;
    transition: all var(--transition-base);
}

.checkbox-label input[type="checkbox"]:checked ~ .checkbox-custom {
    background: var(--primary-600);
    border-color: var(--primary-600);
}

.checkbox-label input[type="checkbox"]:checked ~ .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.875rem;
    font-weight: 700;
}

.checkbox-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-note {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: center;
    margin: 0;
}

.form-success {
    text-align: center;
    padding: 3rem;
}

.success-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.form-success h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.form-success p {
    color: var(--text-secondary);
    margin: 0;
}

@media (max-width: 1024px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .contact-info {
        position: static;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form-container {
        padding: 2rem;
    }
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-light-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-tagline {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-light-secondary);
    margin: 0;
}

.footer-contact h4 {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-contact-list p {
    font-size: 0.9375rem;
    margin: 0;
}

.footer-contact-list a {
    color: var(--primary-400);
    transition: color var(--transition-base);
}

.footer-contact-list a:hover {
    color: var(--primary-300);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-legal p {
    font-size: 0.875rem;
    margin: 0;
}

.footer-certifications {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cert-badge {
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-light-secondary);
}

@media (max-width: 768px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

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

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

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

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1280px) {
    :root {
        --container-max-width: 1024px;
    }
}

@media (max-width: 1024px) {
    :root {
        --container-max-width: 768px;
        --container-padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
        --spacing-4xl: 5rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.375rem;
    }
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .navbar,
    .hero-cta,
    .contact-form,
    .btn {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    section {
        page-break-inside: avoid;
    }
}