:root {
    --color-primary: #7C3AED;
    --color-primary-dark: #6D28D9;
    --color-secondary: #10B981;
    --color-bg: #0F172A;
    --color-bg-card: #1E293B;
    --color-text: #F8FAFC;
    --color-text-muted: #94A3B8;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Nunito Sans', sans-serif;

    --container-width: 1200px;
    --header-height: 70px;
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: #fff;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 15px;
}

.section {
    padding: 60px 0;
}

.section__title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
    font-weight: 700;
    text-align: center;
    background: linear-gradient(to right, #fff, var(--color-text-muted));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

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

.hidden {
    display: none !important;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-weight: 600;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    transition: var(--transition);
    text-align: center;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(124, 58, 237, 0.39);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.23);
}

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

.btn--outline:hover {
    border-color: #fff;
    color: #fff;
}

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

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

.link-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    font-family: inherit;
    font-size: inherit;
    transition: var(--transition);
}

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

.link-btn-inline {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
    font-family: inherit;
}

/* Header - Mobile First */
.header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: #fff;
    white-space: nowrap;
    letter-spacing: -0.5px;
}

.logo__icon {
    width: 35px;
    height: 35px;
}

/* Nav - Mobile */
.nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--color-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: 0.3s ease-in-out;
    z-index: 999;
}

.nav.active {
    right: 0;
}

.nav__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
}

.nav__link {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    position: relative;
    padding: 5px 0;
}

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

.nav__link:hover {
    color: #fff;
}

.nav__link:hover::after {
    width: 100%;
}

.burger {
    display: block;
    /* Visible on mobile */
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 1001;
}

.burger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #fff;
    position: absolute;
    left: 0;
    transition: var(--transition);
}

.burger span:nth-child(1) {
    top: 0;
}

.burger span:nth-child(2) {
    top: 9px;
}

.burger span:nth-child(3) {
    top: 18px;
}

.burger.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 9px;
}

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

.burger.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 9px;
}

/* Hero Section */
.hero {
    height: 100vh;
    /* Fullscreen on mobile too */
    min-height: 500px;
    display: flex;
    align-items: center;
    position: relative;
    background: url('images/hero_bg.jpg') no-repeat center center/cover;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.95));
}

.hero__container {
    position: relative;
    z-index: 1;
    text-align: center;
    /* Center on mobile */
    padding-top: 60px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--color-secondary);
    border-radius: 50px;
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 20px;
    font-size: 0.8rem;
    max-width: 100%;
    white-space: normal;
}

.hero__title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero__subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin: 0 auto 30px;
    max-width: 100%;
}

/* Features */
.features__grid {
    display: grid;
    grid-template-columns: 1fr;
    /* Single column on mobile */
    gap: 20px;
}

.card {
    background: var(--color-bg-card);
    padding: 25px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    text-align: center;
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.2);
}

.feature-card__icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin: 0 auto 15px;
    display: table;
    transition: var(--transition);
}

.card:hover .feature-card__icon {
    transform: scale(1.1);
    filter: drop-shadow(0 0 8px var(--color-primary));
}

.feature-card__title {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

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

/* Services */
.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.service-card {
    padding: 0;
    overflow: hidden;
}

.service-card__img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .service-card__img {
    transform: scale(1.05);
}

.service-card__content {
    padding: 20px;
}

/* Reviews */
.reviews__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.review-card {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.review-card__header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.review-card__avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-primary);
    transition: var(--transition);
}

.card:hover .review-card__avatar {
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--color-primary);
}

.review-card__name {
    margin-bottom: 5px;
    font-size: 1.1rem;
}

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

.review-card__text {
    font-style: italic;
    color: var(--color-text-muted);
    margin-bottom: 15px;
}

.review-card__stars {
    color: #FBBF24;
    font-size: 1.1rem;
}

/* Contacts */
.contacts__wrapper {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.icon-list-item {
    display: flex;
    gap: 10px;
    align-items: center;
}

.contacts__list {
    margin-bottom: 30px;
}

.contacts__list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1rem;
}

.contacts__list i {
    color: var(--color-primary);
    width: 20px;
    text-align: center;
}

.contact-form {
    background: var(--color-bg-card);
    padding: 25px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contacts__desc {
    margin-bottom: 1rem;
    ;
}

.form-group {
    margin-bottom: 15px;
}

.form-input {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
}

.captcha-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.captcha-question {
    font-weight: bold;
    color: var(--color-primary);
    white-space: nowrap;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Footer */
.footer {
    background: #020617;
    padding: 50px 0 20px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
}

.footer__links,
.footer__contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.footer__bottom {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

/* Modals & Cookie (Same as before, inherently responsive) */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal {
    background: var(--color-bg-card);
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    border-radius: var(--border-radius);
    padding: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-content {
    overflow-y: auto;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Media Queries (Tablet & Desktop) */

@media (min-width: 768px) {
    :root {
        --header-height: 80px;
        --container-width: 720px;
    }

    .section {
        padding: 80px 0;
    }

    .section__title {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        text-align: start;
    }

    /* Header */
    .burger {
        display: none;
    }

    .nav {
        position: static;
        /* Reset from fixed */
        height: auto;
        width: auto;
        background: none;
        flex-direction: row;
        transform: none;
    }

    .nav__list {
        flex-direction: row;
        gap: 30px;
        margin-left: 30px;
    }

    .nav__link {
        font-size: 0.95rem;
    }

    .logo__icon {
        width: 40px;
        height: 40px;
    }

    .logo {
        font-size: 1.35rem;
    }

    /* Hero */
    .hero__container {
        text-align: center;
        margin: 0 auto;
        max-width: 800px;
    }

    .hero__overlay {
        background: radial-gradient(circle at center, rgba(15, 23, 42, 0.5), rgba(15, 23, 42, 0.95));
    }

    .hero__badge {
        font-size: 0.9rem;
    }

    .hero__title {
        font-size: 3.5rem;
    }

    .hero__subtitle {
        margin: 0 0 40px;
        font-size: 1.25rem;
    }

    /* Grids */
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

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

    /* Footer */
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
        text-align: left;
    }

    .footer__links,
    .footer__contact {
        align-items: flex-start;
    }

    .contacts__wrapper {
        flex-direction: row;
        justify-content: space-between;
    }

    .contacts__info,
    .contacts__form-wrapper {
        flex: 1;
    }
}

@media (min-width: 1024px) {
    :root {
        --container-width: 1200px;
    }

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

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

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

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