/* ========================================
   DATAPOLUS LANDING - MODERN REDESIGN
   ======================================== */

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(77, 142, 255, 0.3);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-color: #4d8eff;
    --accent-secondary: #00d4ff;
    --accent-gradient: linear-gradient(135deg, #4d8eff 0%, #00d4ff 100%);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --glass-bg: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(77, 142, 255, 0.4);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.05);
}

/* ========================================
   BASE STYLES
   ======================================== */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
    overflow-x: hidden;
}

a {
    cursor: pointer;
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-secondary);
}

main {
    flex: 1;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.2;
    margin: 0;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    background: transparent;
    transition: background 0.3s, backdrop-filter 0.3s;
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(248, 250, 252, 0.8);
}

.navbar-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    margin-left: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 10rem 2rem 4rem;
    position: relative;
}

.hero-content {
    max-width: 800px;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(77, 142, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(77, 142, 255, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

/* ========================================
   SECTIONS
   ======================================== */

.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   GLASS CARDS
   ======================================== */

.card-grid {
    display: grid;
    gap: 1.5rem;
}

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

.card-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: 14px;
    margin-bottom: 1.5rem;
}

.card-icon .material-icons {
    font-size: 28px;
    color: #fff;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.card-tag {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background: rgba(77, 142, 255, 0.1);
    color: var(--accent-color);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Featured card */
.glass-card.featured {
    background: linear-gradient(135deg, rgba(77, 142, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
    border-color: rgba(77, 142, 255, 0.3);
}

.glass-card.featured:hover {
    border-color: rgba(77, 142, 255, 0.5);
}

/* ========================================
   SERVICE CARDS (smaller variant)
   ======================================== */

.service-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.service-card .material-icons {
    font-size: 32px;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-grow: 1;
}

.service-card .btn {
    margin-top: auto;
    align-self: flex-start;
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section {
    background: var(--accent-gradient);
    border-radius: 24px;
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

.cta-section h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    color: #fff;
    margin-bottom: 1rem;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.cta-section .btn {
    background: #fff;
    color: var(--accent-color);
    border-color: transparent;
}

.cta-section .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    color: var(--accent-color);
}

.cta-section .btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    color: #fff;
}

/* ========================================
   TELEGRAM BLOCK
   ======================================== */

.telegram-block {
    padding: 4rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.telegram-block h2 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.telegram-block p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.telegram-block a {
    color: var(--accent-color);
    font-weight: 600;
}

/* ========================================
   FOOTER
   ======================================== */

footer {
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-left {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.footer-right a {
    color: var(--text-secondary);
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
}

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

.footer-right a svg {
    vertical-align: middle;
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-contact a {
    color: inherit;
}

/* ========================================
   THEME TOGGLE
   ======================================== */

.theme-toggle {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 1000;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--border-hover);
}

.theme-toggle .material-icons {
    font-size: 22px;
    color: var(--text-secondary);
}

/* ========================================
   LENS FLARE (subtle background)
   ======================================== */

.flare-group {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

/* ========================================
   MATERIAL ICONS BASE
   ======================================== */

.material-icons {
    font-size: 24px;
    color: var(--accent-color);
}

/* ========================================
   FAQ SECTION
   ======================================== */

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s;
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    user-select: none;
}

.faq-question h5 {
    color: var(--text-primary);
    margin: 0;
    font-size: 1.05rem;
}

.faq-icon {
    color: var(--accent-color);
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.25rem 1.5rem;
}

.faq-answer p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* ========================================
   UTILITIES
   ======================================== */

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 5rem 1.5rem 3rem;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .glass-card, .service-card {
        padding: 1.5rem;
    }

    .cta-section {
        padding: 3rem 1.5rem;
        border-radius: 16px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-right {
        flex-direction: column;
        gap: 1rem;
    }

    .theme-toggle {
        bottom: 1.5rem;
        left: 1.5rem;
    }
}

/* ========================================
   LEGACY SUPPORT (for other pages)
   ======================================== */

.feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    height: 100%;
    transition: all 0.3s;
}

.feature-item:hover {
    border-color: var(--border-hover);
}

.bos-title {
    font-size: 4rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bos-subtitle {
    font-size: 1rem;
    opacity: 0.8;
    letter-spacing: 2px;
    color: var(--text-secondary);
}

.check-list, .cross-list, .pricing-features-list {
    list-style: none;
    padding: 0;
}

.check-list li, .cross-list li, .pricing-features-list li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.check-list .check-icon, .feature-check {
    color: var(--success-color);
}

.cross-list .cross-icon {
    color: var(--danger-color);
}

.level-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    height: 100%;
}

.level-card.level-green { border-color: var(--success-color); background: rgba(16, 185, 129, 0.1); }
.level-card.level-yellow { border-color: var(--warning-color); background: rgba(245, 158, 11, 0.1); }
.level-card.level-red { border-color: var(--danger-color); background: rgba(239, 68, 68, 0.1); }

.btn-back {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
}

.btn-back:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

table {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
}

table thead th {
    background: rgba(77, 142, 255, 0.1);
    color: var(--text-primary);
}

table tbody td {
    color: var(--text-secondary);
}

/* Comparison table border - only on desktop */
@media (min-width: 768px) {
    .comparison-border-end {
        border-right: 1px solid var(--border-color) !important;
    }
}