:root {
    --color-primary: #1a1a1a;
    --color-accent: #2787F5;
    --color-text: #333333;
    --color-text-muted: #666666;
    --color-bg: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-border: #e5e7eb;
    
    --font-main: 'Montserrat', sans-serif;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
    
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main {
    flex: 1 0 auto;
}

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

ul, ol {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    padding: 0;
}

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

h1, h2, h3, h4, h5, h6 {
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.2;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--color-bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition);
    text-align: center;
    cursor: pointer;
    user-select: none;
}

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

.btn--primary:hover {
    background-color: #000000;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--outline {
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

.btn--large {
    padding: 16px 36px;
    font-size: 1.125rem;
    border-radius: var(--radius-sm);
}

.header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: transform var(--transition), background-color var(--transition);
}

.header--hidden {
    transform: translateY(-100%);
}

.header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 1002;
    transition: transform var(--transition);
}

.logo:hover {
    transform: scale(1.02);
}

.logo__text {
    font-family: var(--font-main);
    font-size: 1.5rem; /* Размер шрифта, можно увеличить */
    font-weight: 800;
    font-style: italic;
    color: var(--color-primary);
    line-height: 1;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

.logo__sub {
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-top: 4px;
    padding-left: 2px;
}

/* Специфичные стили для лого в футере (чтобы он был чуть приглушеннее) */
.footer__logo .logo__text {
    color: #4b5563;
}
.footer__logo:hover .logo__text {
    color: var(--color-primary);
}

/* Адаптив для логотипа */
@media (max-width: 768px) {
    .logo__text {
        font-size: 1.25rem;
    }
    .logo__sub {
        font-size: 0.55rem;
    }
}

.nav {
    display: flex;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-primary);
    position: relative;
    padding: 8px 0;
}

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

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: 24px;
    z-index: 1002;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-bg-light);
    color: var(--color-primary);
    transition: all var(--transition);
}

.social-link--vk:hover {
    background-color: var(--color-accent);
    color: #ffffff;
    transform: translateY(-2px);
}

.burger {
    display: none;
    width: 32px;
    height: 24px;
    position: relative;
    z-index: 1002;
}

.burger__line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition);
    border-radius: 2px;
}

.burger__line:nth-child(1) { top: 0; }
.burger__line:nth-child(2) { top: 50%; transform: translateY(-50%); }
.burger__line:nth-child(3) { bottom: 0; }

.burger.is-active .burger__line:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

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

.burger.is-active .burger__line:nth-child(3) {
    top: 50%;
    transform: translateY(-50%) rotate(-45deg);
}

@media (max-width: 1024px) {
    .nav__list {
        gap: 20px;
    }
    
    .header__actions {
        gap: 16px;
    }
    
    .btn.header__btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 991px) {
    .burger {
        display: block;
    }

    .btn.header__btn {
        display: none;
    }

    .nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--color-bg);
        padding: 100px 20px 40px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all var(--transition);
        z-index: 1001;
    }

    .nav.is-active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav__list {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    .nav__link {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 60px 0;
    }
    
    .header__inner {
        height: 70px;
    }
    
    .logo__img {
        height: 40px;
    }
}

/* ==========================================================================
   Modal Window
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    padding: 20px;
}

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

.modal-content {
    background-color: var(--color-bg);
    width: 100%;
    max-width: 420px;
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    position: relative;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition);
}

.modal-overlay.is-active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    color: var(--color-text-muted);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--color-bg-light);
    transition: all var(--transition);
}

.modal-close:hover {
    color: var(--color-primary);
    background-color: #e5e7eb;
    transform: rotate(90deg);
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    text-align: center;
}

.modal-content p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    text-align: center;
    line-height: 1.5;
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-form input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-bg-light);
    transition: all var(--transition);
}

.modal-form input::placeholder {
    color: #9ca3af;
}

.modal-form input:focus {
    outline: none;
    border-color: var(--color-accent);
    background-color: var(--color-bg);
    box-shadow: 0 0 0 3px rgba(39, 135, 245, 0.1);
}

.modal-form .btn {
    margin-top: 8px;
    width: 100%;
}

@media (max-width: 480px) {
    .modal-content {
        padding: 32px 24px;
    }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #fafafa;
    border-top: 1px solid var(--color-border);
    padding: 80px 0 32px;
    margin-top: auto; /* Прижимаем футер к низу, если контента мало */
}

.footer__top {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
    gap: 40px;
    margin-bottom: 64px;
}

.footer__logo {
    display: inline-block;
    margin-bottom: 20px;
}

.footer__desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 320px;
}

.footer__title {
    font-size: 1.125rem;
    margin-bottom: 24px;
    color: var(--color-primary);
}

.footer__nav,
.footer__contacts {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer__nav a {
    color: var(--color-text-muted);
    font-weight: 500;
}

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

.footer__contacts li {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    display: flex;
    gap: 8px;
}

.footer__socials {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.footer__copyright {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer__policy {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer__policy:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ==========================================================================
   Responsive Footer
   ========================================================================== */
@media (max-width: 991px) {
    .footer__top {
        grid-template-columns: 1fr 1fr;
        gap: 48px 32px;
    }
}

@media (max-width: 576px) {
    .footer {
        padding: 60px 0 24px;
    }
    
    .footer__top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}