:root {
    --bg-0: #05070b;
    --bg-1: #080c12;
    --bg-2: #0d1117;
    --surface: rgba(255, 255, 255, 0.05);
    --surface-strong: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.16);
    --text: #f2f5f9;
    --muted: #8b95a5;
    --muted-2: #626b7a;
    --accent: #52dfd6;
    --accent-2: #5b8def;
    --accent-soft: rgba(82, 223, 214, 0.16);
    --danger-bg: #3a1c1c;
    --danger-text: #ff8a8a;
    --warn-bg: #3a2c14;
    --warn-text: #ffc76a;
    --ok-bg: #143b23;
    --ok-text: #5ce089;
    --radius-lg: 26px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    /* Единственное место для замены hero-фотографии — просто перезапиши файл
       backend/app/static/images/siberia-hero.jpg тем же именем. */
    --hero-image: url("/static/images/siberia-hero.jpg");
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 45%, var(--bg-2) 100%);
    color: var(--text);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- background fx ---------- */

.bg-fx {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-fx .blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(110px);
    opacity: 0.32;
    will-change: transform;
}

.bg-fx .blob-1 {
    width: 620px;
    height: 620px;
    top: -180px;
    left: -120px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    animation: blobDrift1 26s ease-in-out infinite alternate;
}

.bg-fx .blob-2 {
    width: 700px;
    height: 700px;
    top: 10%;
    right: -220px;
    background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
    animation: blobDrift2 32s ease-in-out infinite alternate;
}

.bg-fx .blob-3 {
    width: 500px;
    height: 500px;
    bottom: -200px;
    left: 30%;
    background: radial-gradient(circle, var(--accent) 0%, transparent 72%);
    opacity: 0.18;
    animation: blobDrift1 38s ease-in-out infinite alternate-reverse;
}

.bg-fx .grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 0%, transparent 75%);
}

@keyframes blobDrift1 {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(60px, 40px) scale(1.08); }
}
@keyframes blobDrift2 {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(-50px, 60px) scale(1.05); }
}

/* ---------- glass ---------- */

.glass {
    background: var(--surface);
    border: 1px solid var(--border);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* ---------- nav ---------- */

.site-header {
    position: sticky;
    top: 14px;
    z-index: 50;
    margin: 14px auto 0;
    max-width: 1040px;
    padding: 0 20px;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 62px;
    padding: 0 10px 0 18px;
    border-radius: 999px;
    background: rgba(13, 17, 23, 0.4);
    border: 1px solid var(--border);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    box-shadow: 0 12px 40px -16px rgba(0, 0, 0, 0.55);
    transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}

.header-inner.scrolled {
    background: rgba(11, 14, 19, 0.78);
    border-color: var(--border-strong);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 17px;
    letter-spacing: -0.01em;
    color: var(--text);
    text-decoration: none;
}

.logo-mark {
    display: block;
    flex-shrink: 0;
}

nav.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

nav.main-nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    padding: 8px 14px;
    border-radius: 999px;
    transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

nav.main-nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }

nav.main-nav a.nav-cta {
    color: var(--bg-0);
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    font-weight: 600;
    margin-left: 6px;
}
nav.main-nav a.nav-cta:hover { filter: brightness(1.08); }

.nav-toggle { display: none; }

/* ---------- buttons ---------- */

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), filter 0.25s var(--ease);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #06131a;
    box-shadow: 0 12px 30px -10px rgba(82, 223, 214, 0.45);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -12px rgba(82, 223, 214, 0.55); }

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border: 1px solid var(--border-strong);
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-2px); }

.btn::after {
    content: "";
    position: absolute;
    top: 0;
    left: -60%;
    width: 40%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    transition: left 0.7s var(--ease);
}
.btn:hover::after { left: 130%; }

/* ---------- hero (photo) ---------- */

.hero {
    position: relative;
    padding: 150px 0 110px;
    text-align: center;
    overflow: hidden;
    isolation: isolate;
    margin-top: -90px;
}

.hero-photo {
    position: absolute;
    inset: 0;
    z-index: -3;
    background-image: var(--hero-image);
    background-size: cover;
    background-position: center 62%;
    background-repeat: no-repeat;
}

@media (min-width: 860px) {
    .hero-photo { background-attachment: fixed; }
}

.hero-fog {
    position: absolute;
    inset: 0;
    z-index: -2;
    background: radial-gradient(ellipse 90% 45% at 50% 58%, rgba(230, 238, 245, 0.16), transparent 70%);
    mix-blend-mode: screen;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 60% 42% at 50% 40%, rgba(5, 7, 11, 0.55), transparent 68%),
        linear-gradient(180deg, rgba(5, 7, 11, 0.72) 0%, rgba(5, 7, 11, 0.22) 26%, rgba(5, 7, 11, 0.18) 55%, rgba(5, 7, 11, 0.55) 82%, var(--bg-1) 100%),
        linear-gradient(0deg, rgba(5, 7, 11, 0.4), transparent 30%);
}

.hero-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(210, 225, 235, 0.75);
    margin-bottom: 22px;
}

.hero h1 {
    font-size: clamp(40px, 7vw, 80px);
    line-height: 1.04;
    letter-spacing: -0.03em;
    font-weight: 800;
    margin: 0 0 24px;
    color: #fbfdff;
    text-shadow: 0 4px 40px rgba(0, 0, 0, 0.45);
}

.subtitle {
    color: rgba(226, 232, 240, 0.82);
    font-size: 18px;
    line-height: 1.6;
    max-width: 560px;
    margin: 0 auto 40px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.btn-secondary {
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}
.btn-secondary:hover {
    border-color: rgba(82, 223, 214, 0.4);
    box-shadow: 0 0 0 1px rgba(82, 223, 214, 0.15), 0 16px 40px -18px rgba(82, 223, 214, 0.35);
}

/* ---------- features ---------- */

.features {
    padding: 24px 0 80px;
}

.features-head {
    text-align: center;
    margin-bottom: 40px;
}

.features-head h2 {
    font-size: clamp(24px, 3vw, 32px);
    letter-spacing: -0.01em;
    margin: 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 28px 24px;
    border-radius: var(--radius-md);
    text-align: left;
    transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }

.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    color: var(--accent);
    margin-bottom: 16px;
}

.feature-card h3 { margin: 0 0 6px; font-size: 16px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

/* ---------- tariffs ---------- */

.tariffs { padding: 24px 0 100px; position: relative; }
.tariffs h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: clamp(24px, 3vw, 32px);
    letter-spacing: -0.01em;
}

.tariff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 22px;
}

.tariff-card {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

.tariff-card:hover {
    transform: translateY(-6px);
    border-color: rgba(82, 223, 214, 0.45);
    box-shadow: 0 24px 70px -20px rgba(82, 223, 214, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.tariff-card.featured {
    border-color: rgba(82, 223, 214, 0.5);
    box-shadow: 0 0 0 1px rgba(82, 223, 214, 0.25), 0 24px 70px -20px rgba(82, 223, 214, 0.35);
}

.tariff-badge {
    position: absolute;
    top: -13px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #06131a;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 14px;
    border-radius: 999px;
    white-space: nowrap;
}

.tariff-card h3 { margin: 4px 0 4px; font-weight: 600; color: var(--muted); font-size: 15px; }
.price {
    font-size: 40px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 8px 0 26px;
}

/* ---------- footer ---------- */

.site-footer {
    padding: 32px 0 40px;
    color: var(--muted-2);
    text-align: center;
    font-size: 13px;
}

.footer-inner p { margin: 4px 0; }
.footer-inner a { color: var(--muted); text-decoration: none; }
.footer-inner a:hover { color: var(--text); }

/* ---------- auth ---------- */

.container.narrow { max-width: 420px; }
.muted { color: var(--muted); }

.auth-form { padding: 88px 0; }
.auth-form .glass { border-radius: var(--radius-lg); padding: 40px 32px; }
.auth-form h1 { text-align: center; margin: 0 0 24px; font-size: 26px; letter-spacing: -0.01em; }

form label { display: block; margin-bottom: 16px; font-size: 14px; color: var(--muted); }

form input {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    font-size: 15px;
    transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
form input:focus { outline: none; border-color: var(--accent); background: rgba(255, 255, 255, 0.05); }

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

.form-error {
    background: var(--danger-bg);
    color: var(--danger-text);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
}

.auth-form .muted { text-align: center; margin-top: 18px; }
.auth-form a { color: var(--accent); text-decoration: none; }
.auth-form a:hover { text-decoration: underline; }

/* ---------- cabinet ---------- */

.cabinet { padding: 64px 0 100px; }
.cabinet-head { display: flex; justify-content: space-between; align-items: center; }
.cabinet-head h1 { font-size: 30px; letter-spacing: -0.01em; margin: 0; }
.cabinet-head a { color: var(--muted); text-decoration: none; font-size: 14px; }
.cabinet-head a:hover { color: var(--text); }

.empty-state {
    margin-top: 32px;
    padding: 56px 40px;
    text-align: center;
    border-radius: var(--radius-lg);
}
.empty-state p { margin-bottom: 20px; color: var(--muted); }

.sub-card {
    margin-top: 24px;
    padding: 32px;
    border-radius: var(--radius-lg);
}
.sub-inactive { opacity: 0.65; }

.sub-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.sub-status-row { display: flex; align-items: center; gap: 10px; }

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--ok-text);
    box-shadow: 0 0 0 4px rgba(92, 224, 137, 0.16);
}
.status-dot.inactive { background: var(--muted-2); box-shadow: 0 0 0 4px rgba(98, 107, 122, 0.16); }
.status-dot.pulse { animation: dotPulse 2.4s ease-in-out infinite; }

@keyframes dotPulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(92, 224, 137, 0.16); }
    50% { box-shadow: 0 0 0 8px rgba(92, 224, 137, 0.06); }
}

.sub-status-text { font-size: 17px; font-weight: 600; }
.sub-expiry { color: var(--muted); font-size: 14px; }

.progress-ring { flex-shrink: 0; }
.progress-ring circle.track { stroke: rgba(255, 255, 255, 0.08); }
.progress-ring circle.value {
    stroke: url(#ringGradient);
    stroke-linecap: round;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    transition: stroke-dashoffset 1s var(--ease);
}
.progress-ring-label {
    font-size: 15px;
    font-weight: 700;
    fill: var(--text);
    text-anchor: middle;
    dominant-baseline: middle;
}

.progress-bar-outer {
    width: 100%;
    height: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
    margin-top: 8px;
}
.progress-bar-inner {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transition: width 1s var(--ease);
}

.badge { padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.badge-active { background: var(--ok-bg); color: var(--ok-text); }
.badge-inactive { background: rgba(255, 255, 255, 0.08); color: var(--muted); }

.warning-box {
    background: var(--warn-bg);
    color: var(--warn-text);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
}

.sub-card h3 { font-size: 15px; letter-spacing: -0.01em; margin: 28px 0 10px; }

.config-box {
    width: 100%;
    background: rgba(0, 0, 0, 0.35);
    color: #9fe870;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 13px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 14px;
    margin-bottom: 12px;
    resize: vertical;
}

.install-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 12px;
}
.install-col ol { padding-left: 20px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.install-col h4 { margin-bottom: 8px; }

/* ---------- legal ---------- */

.legal-page { padding: 64px 0 100px; }
.container.narrow-legal { max-width: 720px; }
.legal-page h1 { margin-bottom: 24px; font-size: 30px; letter-spacing: -0.01em; }
.legal-page h2 { margin-top: 32px; margin-bottom: 12px; font-size: 20px; }
.legal-page h3 { margin-top: 24px; margin-bottom: 8px; font-size: 16px; }
.legal-page p { color: var(--muted); line-height: 1.7; margin-bottom: 12px; }
.legal-pending { color: var(--warn-text) !important; }

/* ---------- reveal / stagger animations ---------- */

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    animation: fadeInUp 0.8s var(--ease) both;
}
.reveal-delay-1 { animation-delay: 0.08s; }
.reveal-delay-2 { animation-delay: 0.16s; }
.reveal-delay-3 { animation-delay: 0.24s; }

.stagger > * {
    animation: fadeInUp 0.7s var(--ease) both;
}
.stagger > *:nth-child(1) { animation-delay: 0.05s; }
.stagger > *:nth-child(2) { animation-delay: 0.14s; }
.stagger > *:nth-child(3) { animation-delay: 0.23s; }
.stagger > *:nth-child(4) { animation-delay: 0.32s; }
.stagger > *:nth-child(5) { animation-delay: 0.41s; }
.stagger > *:nth-child(6) { animation-delay: 0.5s; }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
    .feature-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .container { padding: 0 16px; }
    .site-header { padding: 0 12px; top: 10px; }
    .header-inner { padding: 0 8px 0 16px; }

    nav.main-nav {
        position: fixed;
        top: 88px;
        left: 16px;
        right: 16px;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 12px;
        border-radius: var(--radius-md);
        background: rgba(13, 17, 23, 0.92);
        border: 1px solid var(--border);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        transform-origin: top;
        transform: scaleY(0);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
        z-index: 60;
    }
    nav.main-nav a { padding: 12px 14px; }
    nav.main-nav.open {
        transform: scaleY(1);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--border);
        color: var(--text);
        cursor: pointer;
    }

    .hero { padding: 100px 0 56px; }
    .hero h1 { font-size: clamp(34px, 11vw, 48px); }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { width: 100%; }

    .tariff-grid { grid-template-columns: 1fr; }
    .sub-top { flex-direction: column; align-items: flex-start; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
    .bg-fx .blob { animation: none; }
    .status-dot.pulse { animation: none; }
}