/* css/styles.css */

/* ================================
   CSS Variables & Root Styles
   ================================ */

:root {
    /* Colors */
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --secondary: #06B6D4;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --neutral-50: #F9FAFB;
    --neutral-100: #F3F4F6;
    --neutral-200: #E5E7EB;
    --neutral-300: #D1D5DB;
    --neutral-400: #9CA3AF;
    --neutral-500: #6B7280;
    --neutral-600: #4B5563;
    --neutral-700: #374151;
    --neutral-800: #1F2937;
    --neutral-900: #111827;
    
    /* Dark Mode Colors */
    --dark-bg: #0F172A;
    --dark-surface: #1E293B;
    --dark-border: #334155;
    --dark-text: #E2E8F0;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 1000;
    --z-toast: 1100;
}

/* Dark Mode */
body.dark-mode {
    --bg-primary: var(--dark-bg);
    --bg-secondary: var(--dark-surface);
    --text-primary: var(--dark-text);
    --text-secondary: #CBD5E1;
    --border-color: var(--dark-border);
    --card-bg: var(--dark-surface);
}

body:not(.dark-mode) {
    --bg-primary: #FFFFFF;
    --bg-secondary: var(--neutral-50);
    --text-primary: var(--neutral-900);
    --text-secondary: var(--neutral-600);
    --border-color: var(--neutral-200);
    --card-bg: #FFFFFF;
}

/* ================================
   Global Styles
   ================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html,
    body {
        scroll-behavior: auto;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ================================
   Typography
   ================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

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

a:hover {
    color: var(--primary-dark);
}

a:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

strong {
    font-weight: 600;
}

/* ================================
   Layout
   ================================ */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-xs);
    }
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    z-index: var(--z-modal);
}

.skip-link:focus {
    top: 0;
}

/* ================================
   Header & Navigation
   ================================ */

.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.8);
}

body.dark-mode .header {
    background-color: rgba(15, 23, 42, 0.8);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

@media (max-width: 640px) {
    .header-content {
        padding: 0.375rem 0;
    }
}

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

@media (max-width: 768px) {
    .logo {
        order: 1;
    }
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 0;
}

@media (max-width: 768px) {
    .nav {
        order: 3;
        gap: 0.25rem;
    }
}

@media (max-width: 640px) {
    .nav {
        gap: 0.125rem;
    }
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-primary);
    min-width: 40px;
    min-height: 40px;
    align-items: center;
    justify-content: center;
}

@media (max-width: 640px) {
    .nav-toggle {
        padding: 0.125rem;
        min-width: 36px;
        min-height: 36px;
    }
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 24px;
    height: 24px;
    pointer-events: none;
    align-items: center;
    justify-content: center;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.nav-toggle[aria-expanded="true"] .hamburger span:first-child {
    transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
    opacity: 0;
    transform: translate(0);
}

.nav-toggle[aria-expanded="true"] .hamburger span:last-child {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background-color: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        padding: var(--space-sm) var(--space-sm);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
        visibility: hidden;
    }

    .nav-toggle[aria-expanded="true"] ~ .nav-menu {
        max-height: 400px;
        visibility: visible;
    }
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

@media (max-width: 768px) {
    .header-actions {
        gap: 0.25rem;
        order: 2;
        margin-left: auto;
    }

    .header-actions .btn {
        display: none;
    }
}

@media (max-width: 640px) {
    .header-actions {
        gap: 0.125rem;
    }
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-lg);
    padding: var(--space-xs);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    min-width: 40px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 640px) {
    .theme-toggle {
        padding: 0.125rem;
        min-width: 36px;
        min-height: 36px;
        font-size: 1.25rem;
    }
}

.theme-toggle:hover {
    background-color: var(--neutral-100);
}

body.dark-mode .theme-toggle:hover {
    background-color: var(--neutral-800);
}

.theme-toggle:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu li {
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link.active {
        color: var(--primary);
    }

    .header-actions {
        gap: var(--space-sm);
    }
}

@media (max-width: 640px) {
    .nav-menu {
        padding: var(--space-xs) var(--space-xs);
    }

    .nav-menu li {
        padding: 0.375rem 0;
    }
}

/* ================================
   Buttons
   ================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
}

@media (max-width: 640px) {
    .btn-sm {
        padding: 0.25rem 0.5rem;
        font-size: 0.8125rem;
    }
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
    min-height: 48px;
}

.btn-block {
    width: 100%;
}

/* ================================
   Forms
   ================================ */

.form-group {
    margin-bottom: var(--space-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.required {
    color: var(--error);
}

.optional {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: var(--font-size-sm);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234F46E5' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-sm) center;
    padding-right: calc(var(--space-sm) + 20px);
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.form-checkbox input[type="checkbox"] {
    width: auto;
    margin-top: 4px;
    margin-right: var(--space-sm);
    cursor: pointer;
}

.form-checkbox label {
    margin-bottom: 0;
    cursor: pointer;
}

.error-message {
    display: block;
    color: var(--error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

input.error,
textarea.error,
select.error {
    border-color: var(--error) !important;
    border-width: 2px;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15) !important;
    background-color: rgba(239, 68, 68, 0.05);
}

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

.hero {
    padding: var(--space-2xl) 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

.hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
    line-height: var(--line-height-relaxed);
}

.hero-bullets {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.bullet {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
}

.bullet-icon {
    color: var(--success);
    font-weight: bold;
    font-size: var(--font-size-xl);
}

.hero-ctas {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    .hero-ctas {
        flex-direction: column;
    }

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

.hero-visual {
    position: relative;
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 75%;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    pointer-events: none;
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .hero-video {
        animation: none;
    }
}

/* ================================
   Section Headers
   ================================ */

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ================================
   Features Section
   ================================ */

.features {
    padding: var(--space-2xl) 0;
    background-color: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background-color: var(--card-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: var(--font-size-sm);
}

/* ================================
   Comparison Section
   ================================ */

.comparison {
    padding: var(--space-2xl) 0;
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--space-xl);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.comparison-table th {
    background-color: var(--bg-secondary);
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.comparison-table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.comparison-cta {
    text-align: center;
}

/* ================================
   Pricing Section
   ================================ */

.pricing {
    padding: var(--space-2xl) 0;
    background-color: var(--bg-secondary);
}

.billing-toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.billing-toggle label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    margin-bottom: 0;
}

.billing-toggle input[type="checkbox"] {
    width: 50px;
    height: 28px;
    appearance: none;
    background-color: var(--neutral-300);
    border-radius: 14px;
    cursor: pointer;
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    outline: none;
}

.billing-toggle input[type="checkbox"]:checked {
    background-color: var(--primary);
}

.billing-toggle input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: white;
    top: 2px;
    left: 2px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.billing-toggle input[type="checkbox"]:checked::before {
    transform: translateX(22px);
}

.toggle-label {
    display: inline-block;
    min-width: 130px;
    text-align: center;
    font-weight: 500;
    transition: opacity 0.3s ease;
    white-space: nowrap;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card-featured {
        order: -1;
    }
}

.pricing-card {
    background-color: var(--card-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    position: relative;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    border-color: var(--primary);
}

.pricing-card-featured {
    border: 2px solid var(--primary);
    box-shadow: 0 0 0 8px rgba(79, 70, 229, 0.1);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: var(--space-lg);
    background-color: var(--primary);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.pricing-header {
    margin-bottom: var(--space-md);
}

.pricing-header h3 {
    margin-bottom: var(--space-xs);
}

.pricing-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.pricing-amount {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.pricing-amount .currency {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.pricing-amount .amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary);
}

.pricing-amount .period {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.billing-info {
    color: var(--success);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

.pricing-features li {
    padding: var(--space-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.pricing-note {
    text-align: center;
    padding: var(--space-lg);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

/* ================================
   Security Section
   ================================ */

.security {
    padding: var(--space-2xl) 0;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.security-card {
    background-color: var(--card-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.security-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.security-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.security-card h3 {
    margin-bottom: var(--space-sm);
}

.security-card p {
    font-size: var(--font-size-sm);
}

.security-cta {
    text-align: center;
    padding: var(--space-lg);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.link-primary {
    color: var(--primary);
    text-decoration: underline;
    font-weight: 500;
}

.link-primary:hover {
    color: var(--primary-dark);
}

/* ================================
   FAQ Section
   ================================ */

.faq {
    padding: var(--space-2xl) 0;
    background-color: var(--bg-secondary);
}

.faq-content {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.faq-question {
    display: block;
    width: 100%;
    padding: var(--space-md);
    background-color: var(--card-bg);
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--bg-secondary);
}

.faq-question:focus {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
}

.faq-item[open] .faq-question {
    border-bottom: 1px solid var(--border-color);
    color: var(--primary);
}

.faq-answer {
    padding: var(--space-md);
    color: var(--text-secondary);
}

.faq-answer p {
    margin-bottom: var(--space-md);
}

.faq-answer ul {
    margin-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

.faq-answer li {
    margin-bottom: var(--space-xs);
}

/* ================================
   Contact Section
   ================================ */

.contact {
    padding: var(--space-2xl) 0;
}

.contact-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

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

/* ================================
   Cloudflare Turnstile CAPTCHA
   ================================ */

#cf-turnstile {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.cf-turnstile iframe {
    border-radius: var(--radius-md);
}

/* ================================
   Toast Notification
   ================================ */

.toast {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    background-color: var(--neutral-900);
    color: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    z-index: var(--z-toast);
    opacity: 0;
    transform: translateY(100px);
    transition: all var(--transition-normal);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.toast.success {
    background-color: var(--success);
}

.toast.error {
    background-color: var(--error);
}

@media (max-width: 640px) {
    .toast {
        bottom: var(--space-md);
        right: var(--space-md);
        left: var(--space-md);
        max-width: none;
    }
}

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

.footer {
    background-color: var(--bg-secondary);
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-col h4 {
    margin-bottom: var(--space-md);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: var(--space-sm);
}

.footer-col a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-divider {
    height: 1px;
    background-color: var(--border-color);
    margin-bottom: var(--space-lg);
}

.footer-bottom {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-xl);
    align-items: start;
}

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

.footer-statement h5 {
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-base);
}

.footer-statement p {
    font-size: var(--font-size-sm);
}

.footer-copyright {
    text-align: right;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .footer-copyright {
        text-align: left;
    }
}

/* ================================
   Utility Classes
   ================================ */

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

.text-primary {
    color: var(--primary);
}

.text-secondary {
    color: var(--text-secondary);
}

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

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

@media (max-width: 640px) {
    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .hero {
        padding: var(--space-xl) 0;
        min-height: auto;
    }

    .features,
    .security,
    .faq,
    .contact,
    .footer {
        padding: var(--space-xl) 0;
    }

    .features-grid,
    .security-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        padding: var(--space-lg);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}