/* ========== CSS Reset & Base ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #1a73e8;
    --primary-dark: #0f4a9e;
    --primary-light: #4a9eff;
    --accent: #ff6b35;
    --accent-light: #ff8a5c;
    --bg: #0b0e1a;
    --bg-card: #12162b;
    --bg-glass: rgba(18, 22, 43, 0.7);
    --text: #e8edf5;
    --text-muted: #8892b0;
    --border: #1e2a4a;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 16px;
    --radius-lg: 24px;
    --transition: 0.3s ease;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --gradient-primary: linear-gradient(135deg, var(--primary-light), var(--accent));
    --gradient-btn: linear-gradient(135deg, var(--primary), var(--primary-dark));
    --gradient-accent: linear-gradient(135deg, var(--accent), #e85d2a);
}

.light-mode {
    --bg: #f4f7fc;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.8);
    --text: #1a1a2e;
    --text-muted: #555e7a;
    --border: #d0d7e6;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
}

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

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

img, svg {
    max-width: 100%;
    display: block;
}

/* ========== Container & Section ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 48px;
    font-size: 1.1rem;
}

/* ========== Glass & Cards ========== */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--gradient-btn);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(26, 115, 232, 0.3);
}

.btn-accent {
    background: var(--gradient-accent);
}

.btn-accent:hover {
    box-shadow: 0 12px 28px rgba(255, 107, 53, 0.3);
}

/* ========== Grids ========== */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

@media (max-width: 992px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    .section {
        padding: 48px 0;
    }
    .section-title {
        font-size: 1.8rem;
    }
}

/* ========== Header / Nav ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(11, 14, 26, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.light-mode .header {
    background: rgba(244, 247, 252, 0.85);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav a {
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.dark-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 6px 14px;
    color: var(--text);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.dark-toggle:hover {
    background: var(--bg-card);
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        transition: transform 0.4s ease;
    }
    .nav.open {
        transform: translateY(0);
    }
    .nav-toggle {
        display: flex;
    }
}

/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 70px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(26, 115, 232, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 50%, rgba(255, 107, 53, 0.1) 0%, transparent 60%);
    z-index: 0;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.hero-card:hover {
    transform: translateY(-4px);
}

.hero-card .stat {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.hero-card .stat:last-child {
    border-bottom: none;
}

.hero-card .stat-label {
    color: var(--text-muted);
}

.hero-card .stat-value {
    font-weight: 700;
    color: var(--primary-light);
}

.hero-card .live-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 107, 53, 0.15);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-card .live-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 1.5s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content p {
        margin: 0 auto 32px;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-card {
        max-width: 100%;
    }
    .hero-content h1 {
        font-size: 2.4rem;
    }
}

/* ========== About ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.about-stat {
    text-align: center;
    padding: 20px;
    background: var(--bg-glass);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: transform var(--transition);
}

.about-stat:hover {
    transform: translateY(-3px);
}

.about-stat .number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-light);
}

.about-stat .label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

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

/* ========== Timeline ========== */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 8px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-light);
    border: 3px solid var(--bg);
    transition: transform var(--transition);
}

.timeline-item:hover::before {
    transform: scale(1.3);
}

.timeline-item .year {
    font-weight: 700;
    color: var(--primary-light);
    font-size: 1.1rem;
}

.timeline-item p {
    color: var(--text-muted);
    margin-top: 6px;
}

/* ========== Features ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.feature-card .icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.2), rgba(255, 107, 53, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
}

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

/* ========== Solutions ========== */
.solutions-grid .glass {
    padding: 32px;
    transition: transform var(--transition);
}

.solutions-grid .glass:hover {
    transform: translateY(-4px);
}

.solutions-grid h3 {
    margin-bottom: 12px;
}

.solutions-grid p {
    color: var(--text-muted);
}

/* ========== HowTo ========== */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.howto-step {
    text-align: center;
    padding: 24px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: transform var(--transition);
}

.howto-step:hover {
    transform: translateY(-4px);
}

.howto-step .step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-btn);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-weight: 700;
    font-size: 1.2rem;
    color: #fff;
}

.howto-step h4 {
    margin-bottom: 8px;
}

.howto-step p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

/* ========== Cases ========== */
.case-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    text-align: center;
    transition: transform var(--transition);
}

.case-card:hover {
    transform: translateY(-4px);
}

.case-card .case-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.case-card h4 {
    margin-bottom: 8px;
}

.case-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========== Testimonials ========== */
.testimonial-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border);
    transition: transform var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
}

.testimonial-card .stars {
    color: #f5b342;
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.testimonial-card p {
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 16px;
}

.testimonial-card .author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-card .author .avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
}

.testimonial-card .author .name {
    font-weight: 600;
}

.testimonial-card .author .role {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ========== News ========== */
.news-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    transition: transform var(--transition);
}

.news-card:hover {
    transform: translateY(-4px);
}

.news-card .date {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.news-card h4 {
    margin-bottom: 8px;
}

.news-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========== FAQ ========== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border-radius: var(--radius);
    margin-bottom: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow var(--transition);
}

.faq-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition);
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.03);
}

.faq-question .icon {
    transition: transform var(--transition);
    font-size: 1.2rem;
}

.faq-item.open .faq-question .icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
    color: var(--text-muted);
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* ========== Partners ========== */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    padding: 20px 0;
    opacity: 0.6;
}

.partner-logos span {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 2px;
    transition: opacity var(--transition);
}

.partner-logos span:hover {
    opacity: 1;
}

/* ========== Contact ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info p {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
}

.contact-info strong {
    color: var(--text);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
    transition: border var(--transition);
    margin-bottom: 16px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-light);
}

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

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

/* ========== Footer ========== */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 24px;
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 12px;
}

.footer-links h4 {
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    margin-top: 32px;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    margin-left: 16px;
}

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

/* ========== Back to Top ========== */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ========== Scroll Reveal ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Cookie Bar ========== */
.cookie-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 9999;
    gap: 16px;
    flex-wrap: wrap;
}

.cookie-bar p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.cookie-bar .btn {
    padding: 8px 20px;
    font-size: 0.85rem;
}

/* ========== Responsive Fine-Tuning ========== */
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .hero-card {
        padding: 24px;
    }
    .about-stats {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .cookie-bar {
        flex-direction: column;
        text-align: center;
    }
}