/* ==================== CSS Variables ==================== */
/* ==================== Light Theme (Default) ==================== */
:root,
:root[data-theme='light'] {
    /* Base Color Palette - Professional Blue */
    --color-primary: #003366;
    --color-primary-variant: #0055AA;
    --color-accent: #0077CC;
    --color-background: #F5F5F5;
    --color-surface: #FFFFFF;
    --color-text: #333333;
    --color-text-secondary: #777777;
    --color-muted: #EEEEEE;
    --color-success: #2E8A3A;
    --color-warning: #E0A800;
    --color-danger: #D9534F;
    --color-border: #DDDDDD;
    --color-nav-text: #FFFFFF;
    --color-nav-border: rgba(255, 255, 255, 0.1);
    --color-sidebar-bg: #002244;
    --color-sidebar-active: #0077CC;
    --color-accent-hover: #0055AA;
    
    /* Legacy mappings for compatibility */
    --brand-navy: var(--color-primary);
    --brand-cyan: var(--color-accent);
    --brand-gray: var(--color-muted);
    --primary-color: var(--color-accent);
    --primary-dark: var(--color-primary-variant);
    --secondary-color: var(--color-muted);
    --accent-color: var(--color-accent);
    --success-color: var(--color-success);
    --warning-color: var(--color-warning);
    --danger-color: var(--color-danger);
    --bg-primary: var(--color-primary);
    --bg-secondary: var(--color-surface);
    --bg-tertiary: var(--color-muted);
    --text-primary: var(--color-text);
    --text-secondary: var(--color-text-secondary);
    --text-tertiary: var(--color-text-secondary);
    --border-color: var(--color-border);
    --border-color-hover: var(--color-accent);
    --hover-bg: rgba(0, 119, 204, 0.08);
    
    /* Shadows */
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 20px rgba(0, 119, 204, 0.2);
    
    /* Input backgrounds */
    --input-bg: #FFFFFF;
    --input-text: var(--color-text);
    
    /* Responsive spacing */
    --container-padding: clamp(1rem, 4vw, 2rem);
    --section-padding: clamp(2rem, 6vw, 4rem);
}

/* ==================== Dark Theme ==================== */
:root[data-theme='dark'] {
    /* Base Color Palette - Dark Mode */
    --color-primary: #1a1a2e;
    --color-primary-variant: #16213e;
    --color-accent: #0088DD;
    --color-background: #0E0E10;
    --color-surface: #1A1A1A;
    --color-text: #E0E0E0;
    --color-text-secondary: #B0B0B0;
    --color-muted: #2A2A2A;
    --color-success: #4CAF50;
    --color-warning: #FFB300;
    --color-danger: #F44336;
    --color-border: #333333;
    --color-nav-text: #FFFFFF;
    --color-nav-border: rgba(255, 255, 255, 0.1);
    --color-sidebar-bg: #121212;
    --color-sidebar-active: #0088DD;
    --color-accent-hover: #0066AA;
    
    /* Legacy mappings for compatibility */
    --brand-navy: var(--color-primary);
    --brand-cyan: var(--color-accent);
    --brand-gray: var(--color-muted);
    --primary-color: var(--color-accent);
    --primary-dark: var(--color-primary-variant);
    --secondary-color: var(--color-muted);
    --accent-color: var(--color-accent);
    --success-color: var(--color-success);
    --warning-color: var(--color-warning);
    --danger-color: var(--color-danger);
    --bg-primary: var(--color-primary);
    --bg-secondary: var(--color-surface);
    --bg-tertiary: var(--color-muted);
    --text-primary: var(--color-text);
    --text-secondary: var(--color-text-secondary);
    --text-tertiary: var(--color-text-secondary);
    --border-color: var(--color-border);
    --border-color-hover: var(--color-accent);
    --hover-bg: rgba(0, 136, 221, 0.15);
    
    /* Shadows */
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 136, 221, 0.4);
    
    /* Input backgrounds */
    --input-bg: #242424;
    --input-text: var(--color-text);
}

/* ==================== Reset & Base ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==================== Navigation ==================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-primary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: #FFFFFF;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--color-accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-weight: bold;
    font-size: 1.25rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--color-nav-text);
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.nav-menu a:hover {
    color: var(--color-accent);
    text-shadow: 0 0 8px rgba(0, 119, 204, 0.3);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: clamp(300px, 50vh, 400px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--section-padding) var(--container-padding);
    background: rgba(0, 119, 204, 0.05);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(0, 119, 204, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(0, 85, 170, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3rem);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-accent), var(--color-primary-variant));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.3rem);
    color: var(--color-text-secondary);
}

/* ==================== Container ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ==================== Section Styles ==================== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: 1rem;
    font-weight: 800;
}

.section-subtitle {
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
    color: var(--color-text-secondary);
}

/* ==================== Toggle Button ==================== */
.toggle-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.toggle-label {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.toggle-btn {
    display: flex;
    background: var(--color-muted);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
}

.toggle-option {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--color-text-secondary);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.toggle-option.active {
    background: var(--color-accent);
    color: #FFFFFF;
}

/* ==================== Pricing Section ==================== */
.pricing-section {
    padding: var(--section-padding) 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.pricing-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: clamp(1.5rem, 4vw, 2rem);
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

.pricing-card.featured {
    border-color: var(--color-accent);
    background: rgba(0, 119, 204, 0.05);
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--color-accent);
    color: var(--color-nav-text);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}

.plan-header {
    margin-bottom: 1.5rem;
}

.plan-name {
    font-size: clamp(1.5rem, 4vw, 1.8rem);
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.plan-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.plan-price {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.currency {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
}

.amount {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: bold;
    background: linear-gradient(135deg, var(--color-accent), var(--color-primary-variant));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.period {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.coming-soon-banner {
    background: rgba(224, 168, 0, 0.15);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--color-warning);
    font-weight: 600;
}

.coming-soon-banner.large {
    padding: 2rem;
    font-size: 1.1rem;
}

.plan-features {
    flex: 1;
    margin-bottom: 2rem;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

.feature.disabled {
    opacity: 0.5;
    color: var(--color-text-secondary);
}

.feature-icon {
    width: 20px;
    height: 20px;
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 2px;
}

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

.btn {
    padding: clamp(0.625rem, 2vw, 0.875rem) clamp(1.25rem, 3vw, 1.75rem);
    border: none;
    border-radius: 8px;
    font-size: clamp(0.875rem, 2vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 44px;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-nav-text);
}

.btn-primary:hover {
    background: var(--color-primary-variant);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 119, 204, 0.4);
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(0, 119, 204, 0.05);
}

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ==================== Comparison Table ==================== */
.comparison-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: clamp(2rem, 6vw, 4rem);
}

.comparison-title {
    font-size: clamp(1.5rem, 4vw, 1.8rem);
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
    text-align: center;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table thead {
    background: rgba(0, 119, 204, 0.1);
}

.comparison-table th {
    padding: 1rem;
    text-align: right;
    color: var(--color-text);
    font-weight: 600;
    border-bottom: 2px solid var(--color-border);
}

.comparison-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.comparison-table tbody tr:hover {
    background: rgba(0, 119, 204, 0.05);
}

.check {
    color: var(--color-success);
    font-weight: bold;
}

.cross {
    color: var(--color-text-secondary);
    font-weight: bold;
}

/* ==================== Enterprises Section ==================== */
.enterprises-section {
    margin-bottom: clamp(2rem, 6vw, 4rem);
}

.enterprise-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: clamp(2rem, 5vw, 3rem);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 3rem);
    align-items: center;
}

.enterprise-content {
    display: flex;
    flex-direction: column;
}

.enterprise-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: 1rem;
    color: var(--color-text);
}

.enterprise-description {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.enterprise-features {
    margin-bottom: 2rem;
}

.enterprise-features h4 {
    color: var(--color-text);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.enterprise-features ul {
    list-style: none;
}

.enterprise-features li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-secondary);
}

.enterprise-features .feature-icon {
    width: 20px;
    height: 20px;
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 2px;
}

.enterprise-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.enterprise-image svg {
    width: 100%;
    max-width: 300px;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

/* ==================== FAQ Section ==================== */
.faq-section {
    padding: var(--section-padding) 0;
    margin-bottom: clamp(2rem, 6vw, 4rem);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: clamp(1.25rem, 3vw, 1.5rem);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--color-accent);
    background: var(--color-surface);
}

.faq-question {
    color: var(--color-text);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.faq-answer {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==================== CTA Section ==================== */
.cta-section {
    background: rgba(0, 119, 204, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: clamp(2rem, 6vw, 4rem);
}

.cta-section h2 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-accent), var(--color-primary-variant));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-section p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== Footer ==================== */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: clamp(1.5rem, 4vw, 2rem);
    text-align: center;
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-accent);
}

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

/* Extra small devices (phones): max-width 575px */
@media (max-width: 575px) {
    .hero-title {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }
    
    .section-title {
        font-size: clamp(1.5rem, 5vw, 1.8rem);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .pricing-card {
        padding: clamp(1.5rem, 4vw, 2rem);
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .amount {
        font-size: clamp(1.75rem, 6vw, 2rem);
    }
    
    .toggle-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .enterprise-card {
        grid-template-columns: 1fr;
        padding: clamp(1.5rem, 4vw, 2rem);
        gap: 2rem;
    }
    
    .enterprise-title {
        font-size: clamp(1.5rem, 4vw, 1.75rem);
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
    
    .comparison-section {
        padding: clamp(1.25rem, 3vw, 1.5rem);
        overflow-x: auto;
    }
}

/* Small devices (tablets): 576px-767px */
@media (min-width: 576px) and (max-width: 767px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .enterprise-card {
        grid-template-columns: 1fr;
    }
}

/* Medium devices (small laptops): 768px-991px */
@media (min-width: 768px) and (max-width: 991px) {
    .hero-title {
        font-size: clamp(2rem, 5vw, 2.5rem);
    }
    
    .section-title {
        font-size: clamp(1.8rem, 4vw, 2rem);
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .enterprise-card {
        grid-template-columns: 1fr;
    }
    
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .toggle-container {
        flex-direction: row;
    }
    
    .nav-menu {
        gap: 1rem;
        font-size: clamp(0.875rem, 1.5vw, 0.9rem);
    }
}

/* Large devices (desktops): 992px-1199px */
@media (min-width: 992px) and (max-width: 1199px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .enterprise-card {
        grid-template-columns: 1fr 1fr;
    }
    
    .faq-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Extra large (wide screens): 1200px+ */
@media (min-width: 1200px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .enterprise-card {
        grid-template-columns: 1fr 1fr;
    }
    
    .faq-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==================== Scrollbar ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-surface);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* ==================== Theme Toggle Button ==================== */
.theme-toggle {
    background: transparent;
    border: 2px solid var(--color-nav-text);
    border-radius: 8px;
    color: var(--color-nav-text);
    cursor: pointer;
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin-left: 1rem;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
    stroke: currentColor;
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme='dark'] .theme-toggle .sun-icon {
    display: block;
}

[data-theme='dark'] .theme-toggle .moon-icon {
    display: none;
}

/* Disable transitions during theme switch to prevent flash */
.no-transition,
.no-transition * {
    transition: none !important;
}