/* --- Variables & Reset --- */
:root {
    --primary: #4F46E5;
    /* Indigo */
    --primary-dark: #4338ca;
    --secondary: #0F172A;
    /* Dark Slate */
    --accent: #06B6D4;
    /* Cyan */
    --text-main: #334155;
    --text-light: #94a3b8;
    --bg-light: #F8FAFC;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
    font-family: 'Outfit', sans-serif;
    color: var(--secondary);
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Components --- */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn--primary {
    background-color: var(--primary);
    color: var(--white);
}

.btn--primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

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

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

.btn__loader {
    display: none;
}

.section {
    padding: 80px 0;
}

.section__title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 10px;
}

.section__subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 50px;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
}

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

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

.logo__text {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--secondary);
}

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

.nav__list {
    display: flex;
    gap: 30px;
}

.nav__link {
    font-weight: 600;
    color: var(--secondary);
    transition: var(--transition);
    font-size: 0.95rem;
}

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

.nav__close,
.burger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary);
}

/* --- Hero --- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('images/hero-background.jpg') no-repeat center/cover;
    color: var(--white);
    text-align: center;
    padding-top: 80px;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(79, 70, 229, 0.7));
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero__title {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--white);
}

.hero__subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero__actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* --- Features --- */
.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--bg-light);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.feature-card__icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
}

/* --- Services (Masonry-ish) --- */
.services {
    background: var(--bg-light);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-item {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.service-item__content {
    padding: 25px;
}

.service-item h3 {
    color: var(--primary);
    margin-bottom: 10px;
}

/* --- Reviews --- */
.reviews__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

.review-card__avatar {
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    overflow: hidden;
    flex-shrink: 0;
}

.review-card__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.stars {
    color: #fbbf24;
}

/* --- Contacts --- */
.contacts__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contacts__list {
    margin-top: 30px;
}

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

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

.form {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form__group {
    margin-bottom: 20px;
}

.form__group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form__group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-family: inherit;
    transition: var(--transition);
}

.form__group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form__error {
    color: #ef4444;
    font-size: 0.85rem;
    display: none;
    margin-top: 5px;
}

.form__status {
    margin-top: 15px;
    text-align: center;
    font-weight: 600;
}

/* --- Footer --- */
.footer {
    background: var(--secondary);
    color: #e2e8f0;
    padding: 60px 0 20px;
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer h4 {
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer a,
.link-btn {
    color: #94a3b8;
    transition: var(--transition);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    text-align: left;
}

.footer a:hover,
.link-btn:hover {
    color: var(--white);
    text-decoration: underline;
}

.footer__bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}


/* --- Modals --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--white);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    border-radius: var(--radius);
    z-index: 2001;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

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

.modal__content {
    padding: 40px;
    overflow-y: auto;
}

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

.modal__content h4 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--secondary);
    font-size: 1.2rem;
}

.modal__content p {
    margin-bottom: 15px;
}

.modal__content ul {
    list-style: disc;
    padding-left: 20px;
    margin-bottom: 15px;
}

.modal__content ol {
    list-style: decimal;
    padding-left: 20px;
    margin-bottom: 15px;
}

.modal__content li {
    margin-bottom: 8px;
}

/* --- Responsive --- */

/* Large screens */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }

    .section__title {
        font-size: 2.8rem;
    }

    .hero__title {
        font-size: 3.5rem;
    }

    .hero__subtitle {
        font-size: 1.3rem;
    }
}

/* Tablet and smaller desktop */
@media (max-width: 1024px) {
    .section {
        padding: 60px 0;
    }

    .section__title {
        font-size: 2.2rem;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.1rem;
    }

    .features__grid,
    .services__grid,
    .reviews__grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }

    .contacts__wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

/* Tablet */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .section {
        padding: 50px 0;
    }

    .section__title {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .section__subtitle {
        margin-bottom: 40px;
        font-size: 0.95rem;
    }

    /* Header */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 80%;
        max-width: 320px;
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        padding-top: 80px;
        transition: 0.4s ease;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        z-index: 1001;
    }

    .nav.active {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: 30px;
        padding: 0 30px;
        margin-top: 0;
    }

    .nav__link {
        font-size: 1.3rem;
    }

    .nav__close {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
        font-size: 1.8rem;
    }

    .burger {
        display: block;
        font-size: 1.5rem;
    }

    /* Hero */
    .hero {
        min-height: 500px;
        padding-top: 70px;
    }

    .hero__content {
        padding: 0 20px;
    }

    .hero__title {
        font-size: 2rem;
        margin-bottom: 15px;
        line-height: 1.2;
    }

    .hero__subtitle {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .hero__actions {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .hero__actions .btn {
        width: 100%;
    }

    .badge {
        font-size: 0.85rem;
        padding: 5px 10px;
    }

    /* Features & Services */
    .features__grid,
    .services__grid,
    .reviews__grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .card {
        padding: 25px;
    }

    .feature-card__icon {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    /* Services */
    .service-item img {
        height: 180px;
    }

    .service-item__content {
        padding: 20px;
    }

    /* Reviews */
    .review-card__header {
        gap: 12px;
    }

    .review-card__avatar {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }

    /* Contacts */
    .contacts__wrapper {
        gap: 30px;
    }

    .contacts__list {
        margin-top: 25px;
    }

    .contacts__list li {
        font-size: 1rem;
        margin-bottom: 12px;
    }

    .form {
        padding: 25px;
    }

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

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

    .footer__col {
        text-align: center;
    }

    .footer ul {
        text-align: center;
    }

    /* Modal */
    .modal {
        width: 95%;
        max-height: 90vh;
        top: 50%;
        transform: translate(-50%, -50%) scale(0.95);
    }

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

    .modal__content {
        padding: 30px 20px;
        max-height: calc(90vh - 60px);
    }

    .modal__content h3 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }

    .modal__content h4 {
        font-size: 1.1rem;
        margin-top: 15px;
    }

    .modal__content p,
    .modal__content ul,
    .modal__content ol {
        font-size: 0.9rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    .section {
        padding: 40px 0;
    }

    .section__title {
        font-size: 1.75rem;
    }

    .section__subtitle {
        font-size: 0.9rem;
    }

    /* Header */
    .logo__text {
        font-size: 1rem;
    }

    .header {
        padding: 12px 0;
    }

    /* Hero */
    .hero {
        min-height: 450px;
        padding-top: 60px;
    }

    .hero__title {
        font-size: 1.75rem;
        margin-bottom: 12px;
    }

    .hero__subtitle {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .badge {
        font-size: 0.8rem;
        padding: 4px 8px;
        margin-bottom: 15px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    /* Cards */
    .card {
        padding: 20px;
    }

    .feature-card__icon {
        font-size: 1.8rem;
    }

    /* Services */
    .service-item img {
        height: 160px;
    }

    .service-item__content {
        padding: 18px;
    }

    /* Reviews */
    .review-card__avatar {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    /* Contacts */
    .contacts__list li {
        font-size: 0.95rem;
        flex-wrap: wrap;
    }

    .form {
        padding: 20px;
    }

    .form__group {
        margin-bottom: 15px;
    }

    .form__group input {
        padding: 10px;
        font-size: 0.9rem;
    }

    /* Footer */
    .footer {
        padding: 40px 0 15px;
    }

    .footer__grid {
        gap: 25px;
    }

    /* Modal */
    .modal {
        width: 98%;
        max-height: 95vh;
    }

    .modal__content {
        padding: 25px 15px;
    }

    .modal__content h3 {
        font-size: 1.3rem;
    }

    .modal__content h4 {
        font-size: 1rem;
    }

    .modal__content p,
    .modal__content ul,
    .modal__content ol {
        font-size: 0.85rem;
    }

    .modal__close {
        top: 10px;
        right: 10px;
        font-size: 1.8rem;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .hero__title {
        font-size: 1.5rem;
    }

    .section__title {
        font-size: 1.5rem;
    }

    .card {
        padding: 18px;
    }

    .btn {
        padding: 9px 18px;
        font-size: 0.85rem;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        transform: none;
    }

    .card:hover {
        transform: none;
    }

    .service-item:hover {
        transform: none;
    }

    /* Increase tap targets for better UX */
    .nav__link,
    .btn {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        min-height: 100vh;
        padding-top: 60px;
    }

    .hero__title {
        font-size: 1.8rem;
    }

    .hero__subtitle {
        font-size: 1rem;
        margin-bottom: 20px;
    }
}