:root {
    --bg-primary: #0a0f1c;
    --bg-surface: #111827;
    --bg-footer: #060a14;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --gradient-hero: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --font-family: 'Inter', sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
    font-size: 1.1rem;
}

section {
    padding: 100px 0;
}

/* ── Header ── */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 15, 28, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 14px 0;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header__pulse {
    width: 10px;
    height: 10px;
    background: var(--accent-green);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}

.header__nav .header__links {
    display: flex;
    gap: 32px;
}

.header__nav .header__links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.header__nav .header__links a:hover {
    color: var(--text-primary);
}

/* Button base */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn--primary:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

/* Hamburger */
.header__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.header__hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
    display: block;
}

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

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

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

/* Mobile nav */
@media (max-width: 768px) {
    .header__nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(10, 15, 28, 0.97);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .header__nav.open {
        opacity: 1;
        pointer-events: all;
    }

    .header__nav .header__links {
        flex-direction: column;
        align-items: center;
        gap: 40px;
    }

    .header__nav .header__links a {
        font-size: 1.5rem;
    }

    .header__cta {
        display: none;
    }

    .header__hamburger {
        display: flex;
    }
}

/* ── Hero Slider ── */
.hero {
    position: relative;
    height: 90vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero__slider {
    position: absolute;
    inset: 0;
}

.hero__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
}

.hero__slide.active {
    opacity: 1;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* Slide 1: Animated grid lines */
.hero__bg--1 {
    background:
        linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        linear-gradient(225deg, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        var(--bg-primary);
    background-size: 100% 100%;
}

.hero__bg--1::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridPulse 4s ease-in-out infinite;
}

@keyframes gridPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

/* Slide 2: Data nodes */
.hero__bg--2 {
    background:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 60% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
        var(--bg-primary);
}

.hero__bg--2::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(59, 130, 246, 0.3) 1px, transparent 1px),
        radial-gradient(circle, rgba(139, 92, 246, 0.2) 1px, transparent 1px);
    background-size: 100px 100px, 150px 150px;
    background-position: 0 0, 50px 50px;
    animation: nodeFloat 6s ease-in-out infinite;
}

@keyframes nodeFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Slide 3: World map dots */
.hero__bg--3 {
    background:
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 70%),
        var(--bg-primary);
}

.hero__bg--3::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(59, 130, 246, 0.15) 1px, transparent 1px);
    background-size: 30px 30px;
    mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, black 30%, transparent 70%);
    opacity: 0.6;
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero__content h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero__content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: 32px;
    color: var(--text-secondary);
    max-width: 550px;
}

.btn--lg {
    padding: 14px 32px;
    font-size: 1.05rem;
}

/* Slider controls */
.hero__controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 20px;
}

.hero__arrow {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
    opacity: 0;
}

.hero:hover .hero__arrow {
    opacity: 1;
}

.hero__arrow:hover {
    background: rgba(255, 255, 255, 0.2);
}

.hero__dots {
    display: flex;
    gap: 12px;
}

.hero__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.hero__dot.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
}

@media (max-width: 768px) {
    .hero {
        height: 85vh;
        min-height: 500px;
    }

    .hero__content {
        text-align: center;
    }

    .hero__content p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__arrow {
        display: none;
    }
}

/* ── Features Grid ── */
.features {
    background: var(--bg-primary);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.features__card {
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 32px;
    transition: var(--transition);
}

.features__card:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.1);
}

.features__icon {
    width: 52px;
    height: 52px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.features__icon--blue {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
}

.features__icon--green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
}

.features__icon--amber {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-amber);
}

.features__card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.features__card p {
    font-size: 0.95rem;
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ── How It Works ── */
.how-it-works {
    background: var(--bg-surface);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
}

.steps__item {
    flex: 1;
    text-align: center;
    padding: 0 24px;
    max-width: 300px;
}

.steps__number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-blue);
    text-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
    margin-bottom: 16px;
}

.steps__item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.steps__item p {
    font-size: 0.95rem;
    line-height: 1.6;
}

.steps__line {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), rgba(139, 92, 246, 0.5));
    margin-top: 36px;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .steps {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }

    .steps__line {
        width: 2px;
        height: 40px;
        background: linear-gradient(180deg, var(--accent-blue), rgba(139, 92, 246, 0.5));
        margin-top: 0;
    }
}

/* ── Stats ── */
.stats {
    background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(59, 130, 246, 0.03) 50%, var(--bg-primary) 100%);
    padding: 80px 0;
}

.stats__grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
}

.stats__item {
    text-align: center;
}

.stats__number {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.stats__label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stats__divider {
    width: 1px;
    height: 60px;
    background: rgba(59, 130, 246, 0.2);
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.1);
}

@media (max-width: 768px) {
    .stats__grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .stats__divider {
        display: none;
    }
}

/* ── Pricing ── */
.pricing {
    background: var(--bg-surface);
}

.pricing__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.pricing__card {
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

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

.pricing__card--popular {
    border-color: var(--accent-blue);
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.15);
    transform: scale(1.05);
}

.pricing__card--popular:hover {
    transform: scale(1.05) translateY(-4px);
}

.pricing__badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-blue);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 20px;
    border-radius: 20px;
}

.pricing__header {
    margin-bottom: 32px;
}

.pricing__header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.pricing__price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.pricing__price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.pricing__header p {
    font-size: 0.95rem;
}

.pricing__features {
    text-align: left;
    margin-bottom: 32px;
}

.pricing__features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

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

.btn--outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.btn--outline:hover {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
}

.pricing .btn {
    width: 100%;
    text-align: center;
}

@media (max-width: 1024px) {
    .pricing__grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }

    .pricing__card--popular {
        transform: none;
    }

    .pricing__card--popular:hover {
        transform: translateY(-4px);
    }
}

/* ── Testimonials ── */
.testimonials {
    background: var(--bg-primary);
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonials__card {
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--accent-blue);
    border-radius: 12px;
    padding: 32px;
    transition: var(--transition);
    position: relative;
}

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

.testimonials__stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.testimonials__quote {
    font-size: 4rem;
    color: rgba(59, 130, 246, 0.15);
    font-family: Georgia, serif;
    line-height: 1;
    height: 30px;
    margin-bottom: 8px;
}

.testimonials__card p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonials__author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonials__name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.testimonials__role {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

@media (max-width: 1024px) {
    .testimonials__grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

/* ── CTA ── */
.cta {
    background: var(--gradient-hero);
    padding: 100px 0;
}

.cta__inner {
    text-align: center;
    max-width: 620px;
}

.cta h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.cta p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

.cta__form {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.cta__form input {
    flex: 1;
    padding: 14px 20px;
    border-radius: 8px;
    border: none;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-family);
    outline: none;
}

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

.cta__form input:focus {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}

.btn--white {
    background: var(--text-primary);
    color: var(--bg-primary);
    font-weight: 600;
    white-space: nowrap;
}

.btn--white:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}

.cta__disclaimer {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
    .cta__form {
        flex-direction: column;
    }
}

/* ── Footer ── */
.footer {
    background: var(--bg-footer);
    padding: 60px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer__brand p {
    margin-top: 12px;
    font-size: 0.95rem;
}

.footer__col h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer__col ul li {
    margin-bottom: 10px;
}

.footer__col ul li a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer__col ul li a:hover {
    color: var(--text-primary);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.85rem;
}

.footer__legal {
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

@media (max-width: 768px) {
    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer__brand {
        grid-column: span 2;
    }

    .footer__bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

/* ── Scroll Animations ── */
.fade-in-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .fade-in-up {
        opacity: 1;
        transform: none;
    }

    .hero__slide {
        transition-duration: 0.01ms !important;
    }
}