:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #4361ee;
    --accent-hover: #3a56d4;
    --card-bg: #f8f9fa;
    --footer-bg: #2b2d42;
    --footer-text: #ffffff;
    --modal-bg: rgba(0, 0, 0, 0.5);
    --success-color: #4caf50;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --accent-color: #4cc9f0;
    --accent-hover: #3ab0d4;
    --card-bg: #2d2d2d;
    --footer-bg: #111217;
    --footer-text: #e0e0e0;
    --modal-bg: rgba(255, 255, 255, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.25s ease, color 0.25s ease;
}

body {
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header {
    padding: 1rem 5%;
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.theme-toggle:hover,
.theme-toggle:focus {
    background-color: var(--card-bg);
    outline: none;
}

.hero {
    text-align: center;
    padding: 4rem 1rem;
    background: linear-gradient(135deg, var(--accent-color), #3a0ca3);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.05)" points="0,1000 1000,0 1000,1000"/></svg>') center/cover no-repeat;
    pointer-events: none;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    position: relative;
}

/* CTA */
.cta-button {
    background: linear-gradient(45deg, var(--accent-color), #7209b7);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1.05rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.cta-button::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;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.25);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-icon {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.cta-button:hover .cta-icon {
    transform: translateX(3px);
}

/* Services */
.services {
    padding: 4rem 5%;
}

.services h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.services-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.06);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.service-card:hover,
.service-card:focus {
    transform: translateY(-6px);
    box-shadow: 0 14px 30px rgba(0,0,0,0.09);
}

.service-card h3 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.price {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 1rem 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-bg);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--bg-color);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 520px;
    position: relative;
    animation: modalAppear 0.25s ease;
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

@keyframes modalAppear {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.close {
    position: absolute;
    right: 1rem;
    top: 0.8rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    background: none;
    border: none;
    line-height: 1;
}

.close:hover {
    color: var(--accent-color);
}

/* Form */
.request-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group label {
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    padding: 10px;
    border: 1px solid #e6e6e6;
    border-radius: 8px;
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.06);
}

.submit-btn {
    background: linear-gradient(45deg, var(--accent-color), #7209b7);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(67,97,238,0.18);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Footer */
.footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 3rem 5%;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
}

.contact-info h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.contact-info a {
    color: #ffffff !important;
    text-decoration: none !important;
}

.contact-info a:hover {
    color: #cccccc;            /* светло-серый при наведении (необязательно) */
}


.social-links a {
    color: var(--footer-text);
    margin-right: 1rem;
    text-decoration: none;
    transition: color 0.2s;
}

.social-links a:hover,
.social-links a:focus {
    color: var(--accent-color);
    outline: none;
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 16px;
    border-radius: 8px;
    color: white;
    font-weight: 700;
    z-index: 1001;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background-color: var(--success-color);
}

.notification.error {
    background-color: #f44336;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
    }
    
    .hero-title {
        font-size: 1.9rem;
    }
    
    .modal-content {
        margin: 8% auto;
        width: 95%;
        padding: 1.5rem;
    }
    
    .cta-button {
        padding: 10px 20px;
        font-size: 1rem;
    }
}

.modal-content {
    background: #111;
    border-radius: 14px;
    padding: 2.2rem;
    max-width: 520px;
    width: 100%;
    margin: auto;
    box-shadow: 0 10px 40px rgba(0,0,0,0.45);
    position: relative;
    animation: modalFade .25s ease;
}

@keyframes modalFade {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.modal-title {
    font-size: 1.9rem;
    font-weight: 700;
    margin-bottom: .5rem;
}

.modal-subtitle {
    font-size: 1rem;
    opacity: .8;
    margin-bottom: 1.8rem;
}

.close {
    position: absolute;
    top: 14px;
    right: 18px;
    font-size: 1.6rem;
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
    transition: .2s;
}
.close:hover { color: #fff; }

.modal-content {
    backdrop-filter: blur(14px);
    background: rgba(20, 20, 20, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    padding: 2.4rem;
    max-width: 520px;
    width: 100%;
    margin: auto;
    box-shadow: 0 25px 60px rgba(0,0,0,0.55);
    position: relative;
    animation: modalFade .25s ease;
}

/* Поля формы */
.request-form input,
.request-form textarea {
    width: 100%;
    padding: .9rem 1.1rem;
    border-radius: 12px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.12);
    color: #fff;
    font-size: 1rem;
    transition: border .2s, background .2s;
}

.request-form input:focus,
.request-form textarea:focus {
    border-color: var(--accent-color);
    background: rgba(255,255,255,0.12);
    outline: none;
}

/* Подписи к полям */
.request-form label {
    color: rgba(255,255,255,0.9);
    font-size: .93rem;
    margin-bottom: .35rem;
    display: block;
}

/* Заголовок и подзаголовок */
.modal-title {
    font-size: 1.85rem;
    font-weight: 700;
    color: rgba(255,255,255,0.95);
    margin-bottom: .35rem;
}

.modal-subtitle {
    font-size: .95rem;
    color: rgba(255,255,255,0.6);
    margin-bottom: 1.8rem;
}

/* Кнопка закрытия */
.close {
    position: absolute;
    top: 16px;
    right: 18px;
    font-size: 1.6rem;
    color: rgba(255,255,255,0.55);
    background: none;
    border: none;
    cursor: pointer;
    transition: .2s;
}
.close:hover {
    color: #fff;
}

/* Кнопка отправки */
.submit-btn {
    margin-top: .8rem;
    width: 100%;
    padding: 1.05rem;
    border: none;
    border-radius: 14px;
    background: var(--accent-color);
    color: #fff;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform .2s, background .25s;
}
.submit-btn:hover {
    transform: translateY(-2px);
}