:root {
    /* Color Palette: Cyber Slate */
    --bg-color: #0f172a;
    /* Slate 900 */
    --text-color: #e2e8f0;
    /* Slate 200 */
    --primary-color: #38bdf8;
    /* Sky 400 */
    --accent-color: #f472b6;
    /* Pink 400 */
    --card-bg: #1e293b;
    /* Slate 800 */
    --modal-bg: #1e293b;
    --border-color: #334155;
    /* Slate 700 */

    --font-main: 'Space Grotesk', sans-serif;

    --container-width: 1200px;
    --transition: all 0.3s ease;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section__title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 10px;
    color: var(--primary-color);
    font-weight: 700;
}

.section__title--left {
    text-align: left;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-align: center;
    transition: var(--transition);
}

.btn--primary {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    color: #fff;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.5);
}

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

.btn--outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn--sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn--full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
}

.nav__list {
    display: none;
    /* Mobile first hidden */
}

/* Burger */
.burger {
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 200;
}

.burger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #fff;
    margin-bottom: 6px;
    transition: var(--transition);
}

.burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

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

.burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-color);
    z-index: 150;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.mobile-menu__list {
    text-align: center;
}

.mobile-menu__link {
    display: block;
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.mobile-menu__close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: #fff;
    font-size: 2.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 10px;
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background-image: url('images/hero_bg.jpg');
    background-size: cover;
    background-position: center;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
}

.hero__content {
    position: relative;
    z-index: 2;
    padding-top: 60px;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 20px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero__title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features */
.features__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
}

.feature-card__icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.feature-card__title {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.feature-card__text {
    color: #94a3b8;
    font-size: 0.95rem;
}

/* Services */
.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    /* Mobile Masonry/Grid */
    gap: 20px;
}

.service-item {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.service-item__img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.service-item__content {
    padding: 20px;
}

/* Review */
.reviews__slider {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.review-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    max-width: 600px;
    margin: 0 auto;
}

.review-card__text {
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.review-card__author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.review-card__avatar {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
}

.review-card__avatar-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

/* Contacts */
.contacts__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.contacts__list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.contacts__list li i {
    color: var(--primary-color);
}

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

.form-input {
    width: 100%;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: #fff;
    font-family: inherit;
    font-size: 1rem;
}

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

.captcha-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.captcha-group span {
    font-size: 1.2rem;
    font-weight: 700;
    white-space: nowrap;
}

.form-status {
    margin-top: 15px;
    text-align: center;
    min-height: 24px;
}

/* Footer */
.footer {
    background-color: #020617;
    padding-top: 60px;
    border-top: 1px solid var(--border-color);
}

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

.footer__title {
    margin-bottom: 20px;
    color: #fff;
    font-size: 1.1rem;
}

.footer__links li {
    margin-bottom: 10px;
}

.footer__links a {
    color: #94a3b8;
}

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

.footer__bottom {
    padding: 20px 0;
    border-top: 1px solid #1e293b;
    text-align: center;
    color: #64748b;
    font-size: 0.9rem;
}

/* Cookie Popup */
.cookie-popup {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    z-index: 900;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: none;
    /* JS toggles this */
}

.cookie-popup.show {
    display: flex;
    flex-direction: column;
    gap: 15px;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.cookie-popup__actions {
    display: flex;
    gap: 10px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: none;
    /* JS toggles */
    opacity: 0;
    transition: opacity 0.3s;
    backdrop-filter: blur(2px);
}

.modal-overlay.open {
    display: block;
    opacity: 1;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background-color: var(--modal-bg);
    padding: 30px;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    z-index: 1001;
    display: none;
    /* JS toggles */
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

.modal.open {
    display: block;
    transform: translate(-50%, -50%) scale(1);
}

.modal__close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: #94a3b8;
    font-size: 1.5rem;
    cursor: pointer;
}

.modal__close:hover {
    color: #fff;
}

.modal__content h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.modal__content p,
.modal__content ul {
    margin-bottom: 15px;
    color: #cbd5e1;
    font-size: 0.95rem;
}

.modal__content ul {
    padding-left: 20px;
    list-style: disc;
}

/* Responsive - Desktop */
@media (min-width: 768px) {
    .nav__list {
        display: flex;
        gap: 30px;
    }

    .burger {
        display: none;
    }

    .mobile-menu {
        display: none;
    }

    .hero__title {
        font-size: 4rem;
    }

    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contacts__container {
        grid-template-columns: 1fr 1fr;
    }

    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cookie-popup {
        max-width: 400px;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

@media (min-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .services__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer__grid {
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
    }

    .reviews__slider {
        grid-template-columns: repeat(3, 1fr);
    }
}