/* Лендинг ChaiBot.ru — изолированный namespace .landing-*.
   Использует CSS-vars из main.css (--accent, --bg, --surface, --text, --muted,
   --border) — темизация (light/dark) уже работает поверх. */

.landing {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.landing a { color: inherit; text-decoration: none; }
.landing img { max-width: 100%; display: block; }

.landing-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ─── Sticky-nav ──────────────────────────────────────── */

.landing-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    border-bottom: 1px solid var(--border);
}
.landing-nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    gap: 24px;
}
.landing-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 1.05rem;
}
.landing-brand__logo {
    width: 32px;
    height: 32px;
    color: var(--accent);
}
.landing-brand__name { font-family: 'Playfair Display', Georgia, serif; }
.landing-nav__links {
    display: flex;
    gap: 28px;
    align-items: center;
    font-size: .95rem;
    color: var(--muted);
}
.landing-nav__links a:hover { color: var(--text); }
.landing-nav__cta {
    padding: 8px 20px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff !important;
    font-weight: 600;
    transition: opacity .15s, transform .15s;
}
.landing-nav__cta:hover { opacity: .9; transform: translateY(-1px); }
@media (max-width: 640px) {
    .landing-nav__links a:not(.landing-nav__cta) { display: none; }
}

/* ─── Hero ─────────────────────────────────────────────── */

.landing-hero {
    padding: 80px 0 48px;
}
.landing-hero__grid {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 64px;
    align-items: center;
}
@media (max-width: 900px) {
    .landing-hero { padding: 56px 0 32px; }
    .landing-hero__grid { grid-template-columns: 1fr; gap: 40px; }
}

.landing-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    font-size: .82rem;
    font-weight: 600;
    margin-bottom: 22px;
    letter-spacing: .02em;
}
.landing-hero__eyebrow::before {
    content: '';
    display: inline-block;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent);
}

.landing-hero h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    font-size: clamp(2.4rem, 5.4vw, 4rem);
    line-height: 1.04;
    letter-spacing: -.015em;
    margin: 0 0 22px;
}
.landing-hero h1 em {
    font-style: italic;
    color: var(--accent);
    font-weight: 400;
}
.landing-hero__lead {
    font-size: 1.18rem;
    color: var(--muted);
    max-width: 520px;
    margin: 0 0 32px;
}
.landing-hero__cta-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}
.landing-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff !important;
    font-weight: 600;
    font-size: 1rem;
    transition: opacity .15s, transform .15s, box-shadow .15s;
    box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--accent) 60%, transparent);
}
.landing-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -8px color-mix(in srgb, var(--accent) 70%, transparent);
}
.landing-cta--ghost {
    background: transparent;
    color: var(--text) !important;
    border: 1px solid var(--border);
    box-shadow: none;
}
.landing-cta--ghost:hover {
    border-color: var(--accent);
    color: var(--accent) !important;
    transform: translateY(-1px);
    box-shadow: none;
}

/* Trust strip */
.landing-trust {
    margin-top: 40px;
    padding-top: 28px;
    border-top: 1px dashed var(--border);
    color: var(--muted);
    font-size: .92rem;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.landing-trust a {
    color: var(--accent);
    font-weight: 600;
    border-bottom: 1px dotted color-mix(in srgb, var(--accent) 40%, transparent);
}
.landing-trust a:hover { border-bottom-style: solid; }

/* ─── Mockup-фрейм для скринов ─────────────────────────── */

.device-frame {
    position: relative;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    aspect-ratio: 9 / 19.5;
    border-radius: 38px;
    background: #1a1a1a;
    padding: 10px;
    box-shadow:
        0 30px 60px -20px rgba(0, 0, 0, 0.35),
        0 0 0 1px rgba(255, 255, 255, 0.06) inset,
        0 0 0 8px color-mix(in srgb, var(--accent) 8%, transparent);
}
.device-frame::before {
    /* Notch */
    content: '';
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 22px;
    background: #000;
    border-radius: 999px;
    z-index: 2;
}
.device-frame__screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    overflow: hidden;
    background: #0a0d12;
    position: relative;
}
.device-frame__screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}
.device-frame__placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,.35);
    font-size: .85rem;
    text-align: center;
    padding: 24px;
}

/* ─── Section header (общий) ───────────────────────────── */

.landing-section {
    padding: 96px 0;
}
@media (max-width: 768px) {
    .landing-section { padding: 64px 0; }
}
.landing-section__title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.8rem, 3.6vw, 2.8rem);
    font-weight: 700;
    margin: 0 0 12px;
    letter-spacing: -.01em;
}
.landing-section__lead {
    color: var(--muted);
    font-size: 1.08rem;
    max-width: 600px;
    margin: 0 0 56px;
}

/* ─── Features (alternating rows) ──────────────────────── */

.landing-features {
    display: flex;
    flex-direction: column;
    gap: 88px;
}
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}
.feature-row--reverse .feature-row__text { order: 2; }
.feature-row--reverse .feature-row__media { order: 1; }
@media (max-width: 768px) {
    .landing-features { gap: 64px; }
    .feature-row { grid-template-columns: 1fr; gap: 28px; }
    .feature-row--reverse .feature-row__text,
    .feature-row--reverse .feature-row__media { order: initial; }
}
.feature-row__num {
    display: inline-block;
    font-family: 'Playfair Display', Georgia, serif;
    color: var(--accent);
    font-size: .9rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.feature-row h3 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.5rem, 2.4vw, 2rem);
    font-weight: 700;
    margin: 0 0 12px;
    line-height: 1.15;
}
.feature-row p {
    color: var(--muted);
    font-size: 1.05rem;
    margin: 0;
}

/* ─── Steps (как это работает) ─────────────────────────── */

.landing-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    counter-reset: step;
}
@media (max-width: 768px) {
    .landing-steps { grid-template-columns: 1fr; gap: 16px; }
}
.step-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 32px 28px;
    position: relative;
    transition: transform .2s, border-color .2s;
}
.step-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}
.step-card__num {
    counter-increment: step;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}
.step-card__num::before { content: counter(step); }
.step-card h4 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.25rem;
    margin: 0 0 8px;
    font-weight: 700;
}
.step-card p { color: var(--muted); margin: 0; font-size: .98rem; }
.step-card code {
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: .9em;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
}

/* ─── Tariffs ──────────────────────────────────────────── */

.tariff-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: stretch;
}
@media (max-width: 900px) {
    .tariff-grid { grid-template-columns: 1fr; gap: 16px; }
}
.tariff-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 36px 32px;
    display: flex;
    flex-direction: column;
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.tariff-card:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
    box-shadow: 0 24px 48px -24px color-mix(in srgb, var(--accent) 30%, transparent);
}
.tariff-card--featured {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 5%, var(--surface));
    box-shadow: 0 24px 48px -28px color-mix(in srgb, var(--accent) 50%, transparent);
}
.tariff-card__badge {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.tariff-card__name {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0 0 8px;
}
.tariff-card__price {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--accent);
    margin: 8px 0 4px;
    line-height: 1;
}
.tariff-card__price-suffix {
    color: var(--muted);
    font-size: .95rem;
    margin-bottom: 28px;
}
.tariff-card__features {
    list-style: none;
    padding: 0;
    margin: 0 0 28px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.tariff-card__features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: .95rem;
    color: var(--text);
}
.tariff-card__features li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px;
}
.tariff-card__cta {
    display: block;
    width: 100%;
    padding: 13px 20px;
    border-radius: 999px;
    text-align: center;
    font-weight: 600;
    border: 1px solid var(--accent);
    color: var(--accent);
    transition: background .15s, color .15s;
}
.tariff-card__cta:hover { background: var(--accent); color: #fff; }
.tariff-card--featured .tariff-card__cta {
    background: var(--accent); color: #fff;
}
.tariff-card--featured .tariff-card__cta:hover { opacity: .9; }

.tariff-disclaimer {
    margin-top: 28px;
    padding: 16px 20px;
    border-radius: 12px;
    background: color-mix(in srgb, var(--accent) 6%, transparent);
    color: var(--muted);
    font-size: .92rem;
    text-align: center;
}
.tariff-disclaimer strong { color: var(--text); }

/* ─── Enterprise hook ──────────────────────────────────── */

.enterprise-hook {
    margin-top: 24px;
    padding: 48px;
    border-radius: 22px;
    background: linear-gradient(135deg,
        color-mix(in srgb, var(--accent) 10%, var(--surface)),
        var(--surface));
    border: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 32px;
    align-items: center;
}
@media (max-width: 768px) {
    .enterprise-hook { grid-template-columns: 1fr; padding: 32px; gap: 20px; }
}
.enterprise-hook h3 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    margin: 0 0 8px;
}
.enterprise-hook p { margin: 0; color: var(--muted); font-size: 1rem; max-width: 600px; }

/* ─── Final CTA ────────────────────────────────────────── */

.final-cta {
    text-align: center;
    padding: 96px 0 80px;
}
.final-cta h2 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0 0 16px;
    font-weight: 700;
}
.final-cta p { color: var(--muted); font-size: 1.1rem; margin: 0 0 32px; }
.final-cta__hint { color: var(--muted); font-size: .9rem; margin-top: 16px; }

/* ─── Footer ───────────────────────────────────────────── */

.landing-footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    color: var(--muted);
    font-size: .9rem;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.landing-footer a { color: var(--accent); }
.landing-footer__brand { display: inline-flex; align-items: center; gap: 8px; }
.landing-footer__brand svg { width: 20px; height: 20px; color: var(--accent); }

/* ─── /login: OTP + лого ───────────────────────────────── */

.login-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
}
.login-card {
    width: 100%;
    max-width: 440px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 40px 36px;
    box-shadow: 0 24px 60px -30px rgba(0, 0, 0, 0.18);
    animation: fade-up .35s ease-out;
}
@keyframes fade-up {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.login-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--accent);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 24px;
}
.login-brand svg { width: 28px; height: 28px; }
.login-brand__name {
    font-family: 'Playfair Display', Georgia, serif;
    color: var(--text);
}
.login-card h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 8px;
}
.login-card__lead {
    color: var(--muted);
    margin: 0 0 28px;
    font-size: .98rem;
}

.login-step { margin-bottom: 24px; }
.login-step__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
    font-weight: 700;
    font-size: .82rem;
    margin-right: 8px;
}
.login-step__title { font-weight: 600; margin-bottom: 12px; font-size: .98rem; }

.login-bot-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    background: var(--accent);
    color: #fff !important;
    font-weight: 600;
    font-size: 1rem;
    transition: opacity .15s, transform .15s;
}
.login-bot-link:hover { opacity: .92; transform: translateY(-1px); }

.otp-input {
    display: flex;
    gap: 10px;
    justify-content: space-between;
    margin: 0 0 12px;
}
.otp-input input {
    width: 100%;
    aspect-ratio: 1;
    max-width: 56px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    font-family: 'Playfair Display', Georgia, serif;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text);
    transition: border-color .15s, box-shadow .15s;
}
.otp-input input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.otp-input input.is-filled { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }

.login-submit {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity .15s;
    margin-top: 8px;
    font-family: inherit;
}
.login-submit:hover { opacity: .9; }

.login-error {
    color: var(--danger);
    font-size: .88rem;
    margin: 0 0 12px;
    padding: 10px 14px;
    background: color-mix(in srgb, var(--danger) 10%, transparent);
    border-radius: 8px;
}
.login-help {
    margin-top: 20px;
    color: var(--muted);
    font-size: .85rem;
    text-align: center;
}
.login-help code {
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    color: var(--accent);
    padding: 1px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.login-back {
    margin-top: 24px;
    color: var(--muted);
    font-size: .9rem;
}
.login-back a { color: var(--accent); }