/* =============================================
   GLOBAL STYLES & CSS VARIABLES (Dark / Light)
   ============================================= */
:root {
    --bg-dark: #050B14;
    --glow-cyan: #00E0FF;
    --glow-blue: #3A7BD5;
    --glow-purple: #8B5CF6;
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --border-glow: rgba(0, 224, 255, 0.25);
    --card-bg: rgba(17, 24, 39, 0.85);
    --header-bg: rgba(10, 15, 26, 0.9);
    --megamenu-bg: #0F172A;
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-dark: #F8FAFE;
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --card-bg: rgba(255, 255, 255, 0.92);
    --header-bg: rgba(255, 255, 255, 0.96);
    --megamenu-bg: #FFFFFF;
    --border-glow: rgba(58, 123, 213, 0.25);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color 0.4s ease, color 0.3s ease;
}

.cyber-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(circle at 20% 30%, #0a1428, #01050c);
    transition: background 0.4s ease;
}

[data-theme="light"] .cyber-bg {
    background: radial-gradient(circle at 20% 30%, #eef2f8, #f8fafc);
}

.grid-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(0deg, rgba(0, 224, 255, 0.02) 0px, rgba(0, 224, 255, 0.02) 1px, transparent 1px, transparent 80px),
        repeating-linear-gradient(90deg, rgba(0, 224, 255, 0.02) 0px, rgba(0, 224, 255, 0.02) 1px, transparent 1px, transparent 80px);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ========== HEADER & NAVIGATION ========== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-glow);
    transition: var(--transition);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    font-size: 30px; 
    font-weight: 800;
    background: linear-gradient(135deg, #FFFFFF, var(--glow-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    transition: var(--transition);
}

[data-theme="light"] .logo {
    background: linear-gradient(135deg, #1E293B, var(--glow-blue));
    -webkit-background-clip: text;
    background-clip: text;
}

.desktop-nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

.desktop-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
}

.desktop-nav a:hover {
    color: var(--glow-cyan);
}

/* MegaMenu (unchanged but improved readability) */
.megamenu-wrapper {
    position: relative;
}

.megamenu-trigger {
    background: transparent;
    border: 1px solid var(--glow-cyan);
    padding: 8px 20px;
    border-radius: 40px;
    color: var(--glow-cyan);
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.megamenu-trigger:hover {
    background: rgba(0, 224, 255, 0.1);
}

.megamenu {
    position: absolute;
    top: 55px;
    left: 0;
    width: 820px;
    background: var(--megamenu-bg);
    border-radius: 24px;
    border: 1px solid var(--border-glow);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s;
    z-index: 200;
    box-shadow: var(--shadow-md);
}

.megamenu.active {
    opacity: 1;
    visibility: visible;
}

.megamenu-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding: 32px;
    gap: 28px;
}

.megamenu-col h4 {
    font-size: 16px;
    margin-bottom: 18px;
    color: var(--glow-cyan);
    font-weight: 600;
}

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

.megamenu-col li {
    margin-bottom: 10px;
}

.megamenu-col a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: 0.2s;
    opacity: 0.85;
}

.megamenu-col a:hover {
    color: var(--glow-cyan);
    opacity: 1;
}

.megamenu-footer {
    padding: 16px 32px;
    border-top: 1px solid var(--border-glow);
    display: flex;
    gap: 24px;
}

.megamenu-footer a {
    color: var(--glow-cyan);
    text-decoration: none;
    font-weight: 500;
}

/* Navigation actions */
.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.theme-toggle {
    background: var(--card-bg);
    border: 2px solid var(--glow-cyan);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    color: var(--glow-cyan);
    font-size: 20px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 8px rgba(0, 224, 255, 0.3);
}

.theme-toggle:hover {
    transform: scale(1.08);
    box-shadow: 0 0 16px rgba(0, 224, 255, 0.6);
    background: rgba(0, 224, 255, 0.15);
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--glow-cyan);
    cursor: pointer;
}

/* OnTop button */
.on-top-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--glow-cyan);
    color: var(--glow-cyan);
    font-size: 24px;
    cursor: pointer;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
}

.on-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.on-top-btn:hover {
    transform: translateY(-5px);
    background: var(--glow-cyan);
    color: var(--bg-dark);
    box-shadow: 0 0 20px rgba(0, 224, 255, 0.6);
}

/* Mobile menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100%;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    z-index: 1000;
    transition: 0.3s;
    padding: 24px;
    border-left: 1px solid var(--border-glow);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.close-mobile {
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--glow-cyan);
    cursor: pointer;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mobile-menu-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 18px;
}

/* ========== HERO SECTION ========== */
.hero {
    padding: 60px 0 80px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 48px;
}

.hero-content {
    flex: 1;
}

.badge {
    background: rgba(0, 224, 255, 0.15);
    padding: 6px 14px;
    border-radius: 40px;
    font-size: 14px;
    color: var(--glow-cyan);
    display: inline-block;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 54px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(to right, var(--text-primary), var(--glow-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-top: 32px;
}

.stat {
    font-weight: 700;
    font-size: 24px;
}

.stat span {
    color: var(--glow-cyan);
}

.hero-visual {
    flex: 1;
    text-align: center;
}

.hero-icon-glow {
    background: rgba(0, 224, 255, 0.05);
    border-radius: 60px;
    padding: 40px;
    display: inline-block;
}

.hero-icon-glow i {
    font-size: 140px;
    color: var(--glow-cyan);
    opacity: 0.8;
}

/* ========== BUTTONS ========== */
.btn-primary {
    background: linear-gradient(135deg, #00A3FF, #0055FF);
    border: none;
    padding: 12px 28px;
    border-radius: 40px;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 163, 255, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--glow-cyan);
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 500;
    color: var(--glow-cyan);
    cursor: pointer;
    transition: 0.2s;
}

.btn-outline:hover {
    background: rgba(0, 224, 255, 0.1);
}

/* ========== SECTIONS ========== */
.section-title {
    font-size: 38px;
    font-weight: 700;
    margin: 60px 0 20px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.service-card {
    background: var(--card-bg);
    backdrop-filter: blur(4px);
    border-radius: 24px;
    padding: 24px;
    border: 1px solid var(--border-glow);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--glow-cyan);
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.service-card i {
    font-size: 32px;
    color: var(--glow-cyan);
    margin-bottom: 16px;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    margin: 30px 0;
}

.ai-item {
    background: var(--card-bg);
    backdrop-filter: blur(4px);
    border-radius: 32px;
    padding: 32px;
    text-align: center;
    border-bottom: 3px solid var(--glow-purple);
    transition: var(--transition);
}

.ai-item:hover {
    transform: translateY(-4px);
}

.ai-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.pricing-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    margin: 40px 0;
}

.price-card {
    background: var(--card-bg);
    backdrop-filter: blur(4px);
    border-radius: 32px;
    padding: 32px;
    flex: 1;
    min-width: 260px;
    border: 1px solid var(--border-glow);
    transition: var(--transition);
}

.price-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.premium-card {
    border-top: 3px solid var(--glow-cyan);
}

.price {
    font-size: 42px;
    font-weight: 800;
    margin: 16px 0;
}

/* Calculator */
.calculator {
    background: var(--card-bg);
    backdrop-filter: blur(4px);
    border-radius: 32px;
    padding: 36px;
    margin: 48px 0;
    border: 1px solid var(--border-glow);
    transition: var(--transition);
}

.form-group {
    margin-bottom: 20px;
}

input, select {
    width: 100%;
    padding: 14px;
    border-radius: 20px;
    background: var(--bg-dark);
    border: 1px solid var(--border-glow);
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--glow-cyan);
    box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.2);
}

.calc-result {
    margin-top: 24px;
    background: var(--bg-dark);
    border-radius: 30px;
    padding: 20px;
    text-align: center;
    font-size: 20px;
}

.calc-result strong {
    font-size: 36px;
    color: var(--glow-cyan);
}

.calc-submit {
    margin-top: 24px;
    width: 100%;
}

/* SEO tags */
.seo-tags {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 32px;
    margin: 32px 0;
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.tags-cloud span {
    background: rgba(0, 224, 255, 0.1);
    padding: 6px 14px;
    border-radius: 40px;
    font-size: 13px;
    color: var(--glow-cyan);
}

/* ========== FOOTER (improved) ========== */
footer {
    margin-top: 80px;
    padding: 48px 0;
    border-top: 1px solid var(--border-glow);
    background: var(--header-bg);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 32px;
}

.footer-content a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-content a:hover {
    color: var(--glow-cyan);
}

/* ========== MODAL ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 40px;
    max-width: 450px;
    width: 90%;
    border: 1px solid var(--glow-cyan);
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--glow-cyan);
}

.modal-content h3 {
    font-size: 28px;
    margin-bottom: 16px;
}

.modal-content input {
    width: 100%;
    margin: 12px 0;
    padding: 14px;
    border-radius: 20px;
    background: var(--bg-dark);
    border: 1px solid var(--border-glow);
    color: var(--text-primary);
}

.modal-content button {
    width: 100%;
    margin-top: 16px;
}

/* ========== COOKIE NOTICE (trendy glassmorphism) ========== */
.cookie-notice {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    max-width: 500px;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 18px 24px;
    border: 1px solid var(--border-glow);
    box-shadow: var(--shadow-md);
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cookie-text {
    font-size: 13px;
    color: var(--text-secondary);
    flex: 1;
}

.cookie-text a {
    color: var(--glow-cyan);
    text-decoration: underline;
}

.cookie-btn {
    background: var(--glow-cyan);
    border: none;
    padding: 8px 20px;
    border-radius: 40px;
    font-weight: 600;
    color: #000;
    cursor: pointer;
    transition: var(--transition);
}

.cookie-btn:hover {
    transform: scale(1.02);
    background: #00c4e6;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
    .desktop-nav {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .megamenu {
        width: 90vw;
        left: -200px;
    }
    .hero h1 {
        font-size: 36px;
    }
    .section-title {
        font-size: 28px;
    }
    .container {
        padding: 0 20px;
    }
    .on-top-btn {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
    .cookie-notice {
        left: 16px;
        right: 16px;
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .nav-actions .btn-outline,
    .nav-actions .btn-primary {
        display: none;
    }
    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
    }
}

/* ========== UTILITIES ========== */
.text-gradient {
    background: linear-gradient(135deg, var(--glow-cyan), var(--glow-blue));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 28px;
}