:root {
    --color-bg: #f4f6fb;
    --color-surface: #ffffff;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-secondary: #e5e7eb;
    --color-danger: #dc2626;
    --color-danger-hover: #b91c1c;
    --color-success: #16a34a;
    --color-warning: #d97706;
    --radius: 0.75rem;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Header */
.header {
    background: var(--color-surface);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.logo--with-img {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.35rem;
}

.logo__img {
    height: 2.25rem;
    width: auto;
    border-radius: var(--radius);
}

.logo:hover {
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav__link {
    color: var(--color-text);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    transition: background 0.2s;
}

.nav__link:hover {
    background: var(--color-bg);
    text-decoration: none;
}

.nav__link--secondary {
    color: var(--color-muted);
    font-weight: 400;
    padding: 0.5rem 0.65rem;
}

.nav__link--secondary:hover {
    color: var(--color-primary);
    background: transparent;
    text-decoration: underline;
}

.nav__link--cta,
.nav__link--out {
    background: var(--color-primary);
    color: #fff;
}

.nav__link--cta:hover,
.nav__link--out:hover {
    background: var(--color-primary-hover);
}

.header__toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Main / Footer */
.main {
    flex: 1;
}

.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-secondary);
    padding: 1.5rem 0;
    text-align: center;
    color: var(--color-muted);
    font-size: 0.875rem;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #e0e7ff 0%, #f3f4f6 100%);
    padding: 5rem 0 4rem;
    text-align: center;
}

.hero__title {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    margin: 0 0 1rem;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-muted);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, background 0.2s;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

.btn:active {
    transform: translateY(1px);
}

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

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

.btn--secondary {
    background: var(--color-secondary);
    color: var(--color-text);
}

.btn--secondary:hover {
    background: #d1d5db;
}

.btn--vk {
    background: #07f;
    color: #fff;
}

.btn--vk:hover {
    background: #0066cc;
}

.btn--danger {
    background: var(--color-danger);
    color: #fff;
}

.btn--danger:hover {
    background: var(--color-danger-hover);
}

.btn--small {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

/* Sections */
.section {
    padding: 3.5rem 0;
}

.section__title {
    text-align: center;
    font-size: 2rem;
    margin: 0 0 2rem;
}

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

/* Grid / Cards */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.card__icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.card__title {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
}

.card p {
    margin: 0;
    color: var(--color-muted);
}

/* Steps */
.steps__list {
    counter-reset: step;
    list-style: none;
    padding: 0;
    max-width: 700px;
    margin: 0 auto;
}

.steps__list li {
    position: relative;
    padding-left: 3.5rem;
    margin-bottom: 1.5rem;
    min-height: 3rem;
}

.steps__list li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

/* FAQ */
.faq__list {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
    padding: 1rem 1.25rem;
}

.faq__item summary {
    font-weight: 600;
    cursor: pointer;
}

.faq__item p {
    margin: 0.75rem 0 0;
    color: var(--color-muted);
}

/* Auth */
.auth {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5rem 0;
}

.auth__box {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2.5rem;
    max-width: 420px;
    text-align: center;
}

.auth__title {
    margin: 0 0 1rem;
    font-size: 1.75rem;
}

.auth__text {
    color: var(--color-muted);
    margin-bottom: 1.5rem;
}

.auth__error {
    color: var(--color-danger);
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* Dashboard */
.dashboard__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.dashboard__title {
    margin: 0;
    font-size: 1.75rem;
}

.dashboard__subtitle {
    margin: 0.25rem 0 0;
    color: var(--color-muted);
}

.user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user__avatar {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow);
}

/* Panel */
.panel {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.panel--ok {
    border-left: 5px solid var(--color-success);
}

.panel--danger {
    border-left: 5px solid var(--color-danger);
}

.panel__title {
    margin: 0 0 0.75rem;
    font-size: 1.25rem;
}

.panel__subtitle {
    margin: 1.5rem 0 0.75rem;
    font-size: 1.1rem;
}

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

.form--inline {
    flex-direction: row;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1;
}

.form__group--wide {
    flex: 2;
}

.form__group label {
    font-weight: 500;
    font-size: 0.9rem;
}

.form__group input,
.form__group textarea,
.form__group select {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-secondary);
    border-radius: var(--radius);
    font-size: 1rem;
    background: #fff;
    color: var(--color-text);
}

.form__group input:focus,
.form__group textarea:focus,
.form__group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form__error {
    color: var(--color-danger);
    margin: 0.5rem 0 0;
    font-size: 0.9rem;
}

/* Sites */
.sites {
    display: grid;
    gap: 1rem;
}

.site-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.site-card__name {
    margin: 0 0 0.25rem;
    font-size: 1.1rem;
}

.site-card__url {
    display: block;
    color: var(--color-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge--ok {
    background: #d1fae5;
    color: #065f46;
}

.badge--warn {
    background: #fef3c7;
    color: #92400e;
}

/* Site detail */
.site-detail .link-back {
    display: inline-block;
    margin-bottom: 1.25rem;
    font-weight: 500;
}

.code-box {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: #1e293b;
    color: #e2e8f0;
    border-radius: var(--radius);
    padding: 1rem;
    margin: 1rem 0;
    overflow-x: auto;
    flex-wrap: wrap;
}

.code-box code,
.code-box pre {
    margin: 0;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.875rem;
    white-space: pre-wrap;
    word-break: break-word;
    flex: 1;
    background: transparent;
    color: inherit;
}

.code-box--pre {
    flex-direction: column;
    align-items: stretch;
}

.code-box--pre .btn--copy {
    align-self: flex-start;
}

.empty {
    color: var(--color-muted);
    text-align: center;
    padding: 2rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .header__toggle {
        display: block;
    }

    .nav {
        display: none;
        position: absolute;
        top: 4rem;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: 1rem 1.25rem;
        box-shadow: var(--shadow);
        border-top: 1px solid var(--color-secondary);
    }

    .nav.is-open {
        display: flex;
    }

    .nav__link {
        width: 100%;
        text-align: center;
    }

    .form--inline {
        flex-direction: column;
        align-items: stretch;
    }

    .dashboard__header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Carousel */
.carousel-section {
    background: var(--color-surface);
}

.carousel {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.carousel__viewport {
    overflow: hidden;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    background: #0a0a12;
}

.carousel__track {
    display: flex;
    transition: transform 0.4s ease-in-out;
    will-change: transform;
}

.carousel__slide {
    flex: 0 0 100%;
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel__slide img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius);
}

.carousel__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.9;
    transition: opacity 0.2s, background 0.2s;
}

.carousel__btn:hover {
    opacity: 1;
    background: var(--color-primary-hover);
}

.carousel__btn--prev {
    left: -1rem;
}

.carousel__btn--next {
    right: -1rem;
}

.carousel__dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.carousel__dot {
    width: 0.75rem;
    height: 0.75rem;
    border: none;
    border-radius: 50%;
    background: var(--color-secondary);
    cursor: pointer;
    transition: background 0.2s;
}

.carousel__dot.is-active {
    background: var(--color-primary);
}

@media (max-width: 768px) {
    .carousel__btn {
        width: 2rem;
        height: 2rem;
        font-size: 1.25rem;
    }

    .carousel__btn--prev {
        left: 0.25rem;
    }

    .carousel__btn--next {
        right: 0.25rem;
    }
}

/* Footer */
.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 1.5rem;
}

.footer__link {
    color: var(--color-text);
    text-decoration: underline;
    text-decoration-color: var(--color-secondary);
    text-underline-offset: 0.15em;
    transition: color 0.2s, text-decoration-color 0.2s;
}

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

@media (min-width: 768px) {
    .footer__inner {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* Legal / Article pages */
.legal__content {
    max-width: 800px;
}

.legal__updated {
    color: var(--color-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.legal h2 {
    font-size: 1.35rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.legal p,
.legal li {
    color: var(--color-text);
    line-height: 1.7;
}

.legal ul,
.legal ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.legal li {
    margin-bottom: 0.5rem;
}

.legal__actions {
    margin-top: 2rem;
}