/* ==============================================================================
 *  Steppe Master — Landing (#web-auth-screen в новом дизайне)
 *  Активируется ТОЛЬКО на лендинге через класс .sm-landing на корне.
 *  Документация: wiki/dev/design-system.md
 * ============================================================================== */

/* ── Theme bridge ────────────────────────────────────────────────────────────
 * The landing was written against the Phase 1 base palette (--bg-*, --ink-*,
 * --gold), which is declared once on :root and is NOT remapped per theme — the
 * three themes remap a different set (--product-bg, --surface-*, --accent,
 * --text-*) on html[data-theme] in rewards-themes.css. That is why the guest
 * landing used to render identically in all three themes.
 *
 * Rebinding the aliases inside the landing scope makes the whole file
 * theme-aware without touching any other surface and without a mass refactor.
 * Fallbacks preserve the previous values if a theme token is ever absent.
 * Board tokens (--wood-*, --pit-*, --stone) are deliberately NOT rebound: the
 * playing surface does not follow the interface theme.
 * ─────────────────────────────────────────────────────────────────────────── */
#web-auth-screen.sm-landing {
    --bg-deep:      var(--product-bg,      #0E0A06);
    --bg-base:      var(--product-bg,      #15100A);
    --bg-elevated:  var(--surface-1,       #1E1810);
    --bg-overlay:   var(--surface-2,       #2A2218);
    --ink-strong:   var(--text-primary,    #F5EBD8);
    --ink-base:     var(--text-secondary,  #C8B894);
    --ink-muted:    color-mix(in srgb, var(--text-secondary, #8A7860) 72%, transparent);
    --line-soft:    var(--border-subtle,   rgba(255, 235, 200, 0.06));
    --line-strong:  var(--border-subtle,   rgba(255, 235, 200, 0.12));
    --gold:         var(--accent,          #D4A24C);
    --gold-bright:  var(--accent-hover,    #E8BC6C);

    /* Перекрываем старые позиционные стили */
    position: fixed;
    inset: 0;
    color: var(--ink-base);
    z-index: 9999;
    overflow-y: auto;
    padding: 0;
    /* Радиально декорированный фон */
    background:
        radial-gradient(ellipse 800px 600px at 80% 20%, color-mix(in srgb, var(--gold) 8%, transparent), transparent 60%),
        radial-gradient(ellipse 600px 400px at 20% 80%, color-mix(in srgb, var(--steppe) 6%, transparent), transparent 60%),
        var(--bg-base);
}

.sm-landing-shell {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.sm-landing-header {
    display: flex; align-items: center; justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 20;
    min-height: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    height: auto;
    padding: env(safe-area-inset-top, 0px) 0 0;
    box-sizing: border-box;
    background: color-mix(in srgb, var(--bg-base) 96%, transparent);
}

/* ── Hero (двухколонка) ──────────────────────────────────────────────────── */
.sm-landing-hero {
    flex: 1;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 40px 0 80px;
}

.sm-landing-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 24px;
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    background: rgba(212, 162, 76, 0.08);
    border: 1px solid rgba(212, 162, 76, 0.20);
    width: fit-content;
}
.sm-landing-eyebrow::before {
    content: '⬢';
    color: var(--gold);
}

.sm-landing-title {
    font-family: var(--font-display);
    font-size: 64px;
    line-height: 1.0;
    letter-spacing: -0.03em;
    font-weight: 700;
    color: var(--ink-strong);
    margin-bottom: 24px;
}
.sm-landing-title em {
    font-style: normal;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-bright) 50%, var(--gold) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.sm-landing-lede {
    font-family: var(--font-body);
    font-size: 19px;
    line-height: 1.5;
    color: var(--ink-base);
    max-width: 520px;
    margin-bottom: 36px;
}

.sm-landing-cta-row {
    display: flex; gap: 12px; flex-wrap: wrap;
    margin-bottom: 36px;
}
.sm-landing-cta {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.02em;
    cursor: pointer;
    border: none;
    transition: all var(--t-fast) var(--ease);
}
.sm-landing-cta--primary {
    background: var(--gold);
    color: var(--bg-deep);
    box-shadow: 0 4px 16px rgba(212, 162, 76, 0.30);
}
.sm-landing-cta--primary:hover {
    background: var(--gold-bright);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-gold);
}
.sm-landing-cta--ghost {
    background: transparent;
    color: var(--ink-base);
    border: 1px solid var(--line-strong);
}
.sm-landing-cta--ghost:hover {
    background: var(--bg-elevated);
    color: var(--ink-strong);
    border-color: var(--ink-muted);
}

.sm-landing-bullets {
    display: flex; flex-direction: column; gap: 10px;
}
.sm-landing-bullet {
    display: flex; align-items: center; gap: 12px;
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--ink-base);
}
.sm-landing-bullet i {
    width: 18px; height: 18px;
    border-radius: 50%;
    background: rgba(94, 138, 59, 0.20);
    color: var(--steppe-bright);
    display: grid; place-items: center;
    font-size: 9px;
}

/* ── Right column: demo board + auth card ────────────────────────────────── */
.sm-landing-right {
    display: flex; flex-direction: column; gap: 24px;
    align-items: stretch;
}

/* Демо-доска (анимация) */
.sm-demo {
    background: linear-gradient(135deg, var(--wood-mid) 0%, var(--wood-dark) 50%, #1A0E04 100%);
    border-radius: var(--radius-xl);
    padding: 28px;
    border: 1px solid rgba(212, 162, 76, 0.20);
    box-shadow: var(--shadow-deep);
    position: relative;
    overflow: hidden;
}
.sm-demo::before {
    /* Тонкая текстура «дерева» */
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(0deg,
            rgba(0,0,0,0.06) 0px, transparent 1px, transparent 4px, rgba(0,0,0,0.06) 5px),
        repeating-linear-gradient(90deg,
            rgba(255,200,150,0.02) 0px, transparent 1px, transparent 12px);
    pointer-events: none;
    border-radius: var(--radius-xl);
}
.sm-demo-eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--gold);
    letter-spacing: 0.10em;
    margin-bottom: 14px;
    text-transform: uppercase;
    position: relative; z-index: 1;
    display: flex; align-items: center; gap: 8px;
}
.sm-demo-eyebrow::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--steppe-bright);
    box-shadow: 0 0 8px var(--steppe-bright);
    animation: sm-pulse 1.6s ease-in-out infinite;
}

.sm-demo-board {
    position: relative; z-index: 1;
    display: grid;
    grid-template-rows: auto auto;
    gap: 10px;
}
.sm-demo-row {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 8px;
}
.sm-demo-pit {
    aspect-ratio: 1;
    background: var(--pit-bg);
    border-radius: 50%;
    border: 1px solid var(--pit-border);
    display: grid; place-items: center;
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--stone);
    box-shadow:
        inset 0 2px 6px rgba(0,0,0,0.5),
        inset 0 -1px 2px rgba(255,200,150,0.05);
    position: relative;
    transition: all 0.4s var(--ease);
}
.sm-demo-pit.is-active {
    border-color: var(--gold);
    box-shadow:
        inset 0 2px 6px rgba(0,0,0,0.5),
        0 0 16px rgba(212, 162, 76, 0.40);
    color: var(--gold-bright);
    transform: scale(1.06);
}
.sm-demo-pit.is-last {
    border-color: var(--steppe-bright);
    color: var(--steppe-bright);
}

.sm-demo-meta {
    margin-top: 16px;
    display: flex; justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink-muted);
    position: relative; z-index: 1;
}
.sm-demo-kazan {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--gold);
}
.sm-demo-kazan strong { color: var(--ink-strong); font-size: 14px; }

/* ── Auth card ───────────────────────────────────────────────────────────── */
.sm-auth-card {
    background: var(--bg-elevated);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-xl);
    padding: 28px;
    box-shadow: var(--shadow-medium);
}
.sm-auth-tabs {
    display: flex; gap: 4px;
    padding: 4px;
    background: var(--bg-deep);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}
.sm-auth-tab {
    flex: 1;
    padding: 10px;
    background: transparent;
    border: none;
    color: var(--ink-muted);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--t-fast) var(--ease);
}
.sm-auth-tab.is-active {
    background: var(--bg-overlay);
    color: var(--ink-strong);
}
.sm-auth-input {
    width: 100%;
    background: var(--bg-deep);
    color: var(--ink-strong);
    font-family: var(--font-body);
    font-size: 15px;
    padding: 12px 16px;
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.sm-auth-input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(212, 162, 76, 0.20);
}
.sm-auth-input::placeholder { color: var(--ink-disabled); }

.sm-auth-label {
    display: block;
    margin: 0 2px 6px;
    color: var(--ink-base);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 600;
}

.sm-password-field { position: relative; }
.sm-password-field .sm-auth-input { padding-right: 52px; }
.sm-password-toggle {
    position: absolute;
    top: 1px;
    right: 1px;
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--ink-muted);
    cursor: pointer;
}
.sm-password-toggle:hover { color: var(--ink-strong); }
.sm-password-toggle:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

.sm-auth-submit {
    width: 100%;
    background: var(--gold);
    color: var(--bg-deep);
    font-family: var(--font-body);
    font-weight: 700;
    letter-spacing: 0.02em;
    font-size: 15px;
    padding: 14px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-top: 8px;
    transition: all var(--t-fast) var(--ease);
}
.sm-auth-submit:hover {
    background: var(--gold-bright);
    box-shadow: var(--shadow-glow-gold);
    transform: translateY(-1px);
}
.sm-auth-hint {
    margin-top: 14px;
    text-align: center;
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--ink-muted);
}
.sm-auth-form { display: none; }
.sm-auth-form.is-active { display: block; }

/* ── Footer ──────────────────────────────────────────────────────────────── */
.sm-landing-footer {
    border-top: 1px solid var(--line-soft);
    padding: 24px 0;
    display: flex; justify-content: space-between;
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--ink-muted);
}
.sm-landing-footer-links { display: flex; gap: 20px; }
.sm-landing-footer a { color: var(--ink-muted); text-decoration: none; transition: color var(--t-fast); }
.sm-landing-footer a:hover { color: var(--gold-bright); }

/* ── Mobile ─────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .sm-landing-shell { padding: 0 20px; }
    .sm-landing-hero {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 24px 0 40px;
    }
    .sm-landing-title { font-size: 40px; }
    .sm-landing-lede  { font-size: 16px; }
    .sm-landing-cta-row { flex-direction: column; align-items: stretch; }
    .sm-demo { padding: 18px; }
    .sm-landing-footer { flex-direction: column; gap: 12px; }
    .sm-landing-right .sm-auth-card { order: -1; }
}

@media (max-width: 560px) {
    #web-auth-screen.sm-landing {
        background:
            radial-gradient(ellipse 460px 360px at 70% 0%, rgba(212, 162, 76, 0.10), transparent 62%),
            radial-gradient(ellipse 420px 300px at 10% 90%, rgba(94, 138, 59, 0.08), transparent 60%),
            var(--bg-base);
    }

    .sm-landing-shell {
        min-height: 100dvh;
        padding: 0 16px;
    }

    .sm-landing-header { min-height: calc(64px + env(safe-area-inset-top, 0px)); }

    .sm-landing-hero {
        gap: 22px;
        padding: 18px 0 32px;
    }

    .sm-landing-title {
        font-size: clamp(34px, 11vw, 44px);
        line-height: 1.06;
        letter-spacing: 0;
    }

    .sm-landing-lede {
        font-size: 15px;
        line-height: 1.5;
        margin-bottom: 24px;
    }

    .sm-landing-cta-row {
        gap: 10px;
        margin-bottom: 22px;
    }

    .sm-landing-cta {
        width: 100%;
        justify-content: center;
        min-height: 48px;
        padding: 13px 16px;
    }

    .sm-landing-bullet {
        align-items: flex-start;
        font-size: 13px;
        line-height: 1.35;
    }

    .sm-demo,
    .sm-auth-card {
        border-radius: 22px;
        background-color: rgba(30, 24, 16, 0.78);
        backdrop-filter: blur(18px) saturate(145%);
        -webkit-backdrop-filter: blur(18px) saturate(145%);
    }

    .sm-demo-row {
        gap: 5px;
    }

    .sm-demo-meta {
        gap: 8px;
        flex-wrap: wrap;
        font-size: 11px;
    }

    .sm-auth-card {
        padding: 20px;
    }

    .sm-auth-input,
    .sm-auth-submit,
    .sm-auth-tab {
        min-height: 46px;
    }
}
.sm-auth-link {
    appearance: none;
    border: 0;
    padding: 0;
    background: transparent;
    color: var(--gold-bright);
    font: inherit;
    cursor: pointer;
}

.sm-auth-link:hover,
.sm-auth-link:focus-visible { text-decoration: underline; }

.sm-auth-error {
    margin: 10px 4px 2px;
    color: #ff9b91;
    font-size: 13px;
    line-height: 1.35;
}

.sm-auth-error[hidden] { display: none; }

/* ── Engine proof (R-04) ─────────────────────────────────────────────────────
 * A single verifiable fact about the engine, including a rejected candidate.
 * Populated only from GET /api/ai/dossier; hidden when that source is silent.
 * Colours come from theme tokens via the bridge at the top of this file.
 * ─────────────────────────────────────────────────────────────────────────── */
.sm-landing-proof {
    margin-top: 28px;
    padding: 16px 18px;
    max-width: 560px;
    border: 1px solid var(--line-strong);
    border-left: 3px solid var(--gold);
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--ink-strong) 4%, transparent);
}

.sm-landing-proof[hidden] { display: none; }

.sm-landing-proof__kicker {
    margin: 0 0 6px;
    color: var(--gold);
    font-family: var(--font-body);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.10em;
    text-transform: uppercase;
}

.sm-landing-proof__line {
    margin: 0;
    color: var(--ink-base);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
}

.sm-landing-proof__link {
    margin-top: 10px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--gold-bright);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

.sm-landing-proof__link::after {
    content: '→';
    transition: transform var(--t-fast) var(--ease);
}

.sm-landing-proof__link:hover::after,
.sm-landing-proof__link:focus-visible::after { transform: translateX(3px); }
.sm-landing-proof__link:hover { text-decoration: underline; }

@media (max-width: 767px) {
    .sm-landing-proof { margin-top: 22px; padding: 14px 16px; }
}

/* ── Contextual auth gate (R-01) ─────────────────────────────────────────────
 * Shown only when a guest reaches something that genuinely needs an account.
 * It states the benefit, so registration reads as keeping progress rather than
 * as a toll. Colours resolve through the theme bridge at the top of this file.
 * ─────────────────────────────────────────────────────────────────────────── */
.sm-auth-gate {
    margin: 0 0 16px;
    padding: 12px 14px;
    border: 1px solid var(--line-strong);
    border-left: 3px solid var(--gold);
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--gold) 10%, transparent);
    color: var(--ink-base);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.45;
}

.sm-auth-gate[hidden] { display: none; }

.sm-auth-gate-dismiss {
    display: block;
    width: 100%;
    min-height: 44px;
    margin: 0 0 16px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--ink-base);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.sm-auth-gate-dismiss:hover { border-color: var(--gold); color: var(--ink-strong); }
.sm-auth-gate-dismiss[hidden] { display: none; }