/* Auth page */
        :root {
            --color-primary: oklch(68% 0.14 65);
            --color-primary-content: #16140e;
            --color-secondary: oklch(74% 0.12 70);
            --color-accent: oklch(68% 0.14 65);
            --color-base-100: #f7f4ee;
            --color-base-200: #fdfbf6;
            --color-base-300: #dcd5c4;
            --color-base-content: #16140e;
            --radius-btn: 8px;
            --radius-box: 12px;
        }
        body {
            min-height: 100vh;
            min-height: 100dvh;
            background: var(--auth-bg);
            display: flex;
            align-items: flex-start;
            justify-content: center;
            padding: 64px 20px 60px;
            overflow-x: hidden;
            position: relative;
            color: var(--text);
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        .auth-language-switch {
            position: fixed;
            top: 18px;
            right: 18px;
            z-index: 110;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: color-mix(in srgb, var(--surface) 84%, transparent);
            box-shadow: var(--shadow);
            backdrop-filter: blur(10px);
        }

        .auth-language-btn {
            min-width: 40px;
            height: 28px;
            border: 1px solid transparent;
            border-radius: 999px;
            background: transparent;
            color: var(--sub-text);
            font-family: var(--font-mono);
            font-size: 0.68rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            cursor: pointer;
            transition: color var(--dur-quick) var(--ease-quick), background var(--dur-quick) var(--ease-quick), border-color var(--dur-quick) var(--ease-quick);
        }

        .auth-language-btn:hover {
            color: var(--text);
            border-color: color-mix(in srgb, var(--border) 72%, transparent);
        }

        .auth-language-btn.is-active {
            background: color-mix(in srgb, var(--accent) 24%, var(--surface));
            border-color: color-mix(in srgb, var(--accent) 62%, var(--border));
            color: var(--text);
        }

        .auth-wrapper {
            max-width: 440px;
            padding-top: 20px;
        }

        /* Tab panels */
        .tab-panel {
            display: none;
            transform-origin: top center;
        }
        .tab-panel.active {
            display: block;
            animation: fadeInTab var(--dur-medium) var(--ease-quick) both;
        }
        .tab-panel.tab-panel-leaving {
            display: block;
            pointer-events: none;
            animation: fadeOutTab var(--dur-quick) var(--ease-quick) both;
        }
        @keyframes fadeInTab {
            from { opacity: 0; transform: translate3d(0, 18px, 0) scale(0.98); filter: blur(2px); }
            to   { opacity: 1; transform: translate3d(0, 0, 0) scale(1); filter: blur(0); }
        }
        @keyframes fadeOutTab {
            from { opacity: 1; transform: translate3d(0, 0, 0) scale(1); filter: blur(0); }
            to   { opacity: 0; transform: translate3d(0, -8px, 0) scale(0.99); filter: blur(1px); }
        }

        #loginQrGroup,
        #loginKeyGroup,
        #loginTotpGroup {
            transform-origin: top center;
        }
        #loginQrGroup.auth-method-entering,
        #loginKeyGroup.auth-method-entering,
        #loginTotpGroup.auth-method-entering {
            animation: auth-method-in var(--dur-medium) var(--ease-quick) both;
        }
        #loginQrGroup.auth-method-leaving,
        #loginKeyGroup.auth-method-leaving,
        #loginTotpGroup.auth-method-leaving {
            animation: auth-method-out var(--dur-quick) var(--ease-quick) both;
        }
        @keyframes auth-method-in {
            from { opacity: 0; transform: translate3d(0, 12px, 0) scale(0.985); }
            to   { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
        }
        @keyframes auth-method-out {
            from { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
            to   { opacity: 0; transform: translate3d(0, -6px, 0) scale(0.99); }
        }

        /* Input fields — underline style */
        .auth-input {
            padding-left: 0 !important;
            padding-right: 0 !important;
            background: transparent !important;
            border: none !important;
            border-bottom: 1px solid var(--border) !important;
            border-radius: 0 !important;
            font-size: 1.05rem !important;
            box-shadow: none !important;
        }
        .auth-input:focus {
            border-bottom-color: var(--text) !important;
            box-shadow: none !important;
        }
        .auth-input-icon { display: none; }
        .auth-label {
            font-family: var(--font-mono);
            font-size: 0.62rem;
            letter-spacing: 0.14em;
            text-transform: uppercase;
        }

        /* Key textarea monospace style */
        .auth-input.mono {
            font-family: var(--font-mono);
            font-size: 0.82rem;
            line-height: 1.6;
        }

        /* TOTP code input */
        .totp-input {
            font-family: var(--font-mono) !important;
            font-size: 1.4rem !important;
            letter-spacing: 0.3em;
            text-align: center;
            font-weight: 500;
        }

        /* QR divider */
        .qr-divider {
            border-top: 1px solid var(--border);
            padding-top: 18px;
            margin-top: 4px;
        }
        .qr-instructions {
            font-size: 0.78rem;
            color: var(--sub-text);
            line-height: 1.65;
            margin-bottom: 10px;
        }
        .qr-instructions strong { color: var(--text); }
        .totp-secret-box {
            background: var(--surface-2);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--text);
            word-break: break-all;
        }

        .auth-qr-login-card {
            border: none;
            border-radius: 0;
            background: transparent;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .auth-qr-login-code {
            width: min(100%, 320px);
            min-height: 336px;
            border-radius: 20px;
            border: none;
            background: transparent;
            box-shadow: none;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: visible;
            padding: 0;
            margin: 0 auto;
        }

        .auth-qr-login-code.sun-qr-login-brand-mode {
            box-shadow:
                0 0 0 1px color-mix(in srgb, var(--accent) 34%, transparent),
                0 10px 24px color-mix(in srgb, var(--accent) 18%, transparent);
        }

        .auth-qr-login-ring {
            position: absolute;
            inset: 0;
            margin: auto;
            width: min(100%, 312px);
            height: min(100%, 312px);
            aspect-ratio: 1 / 1;
            pointer-events: none;
            opacity: 0;
            transition: opacity var(--dur-medium) var(--ease-quick);
        }

        .auth-qr-login-code.sun-qr-login-brand-mode .auth-qr-login-ring {
            display: none;
        }

        .auth-qr-login-ring.is-active {
            opacity: 1;
        }

        .auth-qr-login-ring svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
            overflow: visible;
        }

        .auth-qr-login-ring-track {
            fill: none;
            stroke: color-mix(in srgb, var(--border) 60%, transparent);
            stroke-width: 2.4;
        }

        .auth-qr-login-ring-progress {
            fill: none;
            stroke: var(--accent, #d4a253);
            stroke-width: 2.6;
            stroke-linecap: round;
            stroke-dasharray: var(--ring-circumference, 314.159);
            stroke-dashoffset: 0;
            transition: stroke var(--dur-quick) var(--ease-quick);
            filter: drop-shadow(0 0 4px color-mix(in srgb, var(--accent, #d4a253) 50%, transparent));
        }

        .auth-qr-login-ring.is-running .auth-qr-login-ring-progress {
            animation: authQrRingDeplete var(--ring-duration, 75s) linear forwards;
        }

        .auth-qr-login-ring.is-warning .auth-qr-login-ring-progress {
            stroke: #e07b3a;
        }

        @keyframes authQrRingDeplete {
            from { stroke-dashoffset: 0; }
            to { stroke-dashoffset: var(--ring-circumference, 314.159); }
        }

        .auth-qr-login-code.is-pulsing .auth-qr-login-layer.is-active {
            animation: authQrLayerPulse 1.2s var(--ease-quick) infinite;
        }

        @keyframes authQrLayerPulse {
            0%, 100% { transform: scale(1); filter: brightness(1); }
            50% { transform: scale(1.012); filter: brightness(1.08); }
        }

        .auth-qr-login-layer {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transform: scale(0.986);
            filter: saturate(0.96) brightness(0.98);
            transition:
                opacity var(--dur-quick) var(--ease-quick),
                transform var(--dur-quick) var(--ease-quick),
                filter var(--dur-quick) var(--ease-quick);
            pointer-events: none;
        }

        .auth-qr-login-layer.is-active {
            opacity: 1;
            transform: scale(1);
            filter: saturate(1) brightness(1);
        }

        .auth-qr-login-skeleton {
            position: absolute;
            inset: 0;
            margin: auto;
            width: min(100%, 320px);
            height: min(100%, 320px);
            aspect-ratio: 1 / 1;
            border-radius: 12px;
            background:
                linear-gradient(110deg,
                    color-mix(in srgb, var(--surface-2) 80%, transparent) 8%,
                    color-mix(in srgb, var(--surface) 90%, transparent) 18%,
                    color-mix(in srgb, var(--surface-2) 80%, transparent) 33%);
            background-size: 220% 100%;
            animation: authQrSkeletonShimmer 1.4s var(--ease-quick) infinite;
            opacity: 1;
            transition: opacity var(--dur-quick) var(--ease-quick);
            pointer-events: none;
        }

        .auth-qr-login-skeleton.is-hidden {
            opacity: 0;
        }

        @keyframes authQrSkeletonShimmer {
            0% { background-position: 100% 0; }
            100% { background-position: -100% 0; }
        }

        .auth-qr-login-code canvas,
        .auth-qr-login-code img {
            width: min(100%, 320px);
            height: auto;
            aspect-ratio: 1 / 1;
            border-radius: 20px;
            display: block;
            margin: 0 auto;
            box-shadow:
                0 14px 30px rgba(0, 0, 0, 0.18),
                0 2px 0 rgba(255, 255, 255, 0.4) inset;
            animation: authQrAppear var(--dur-slow) var(--ease-quick) both;
        }

        @keyframes authQrAppear {
            from {
                opacity: 0;
                transform: translateY(6px) scale(0.97);
                filter: blur(1px);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
                filter: blur(0);
            }
        }

        .auth-qr-login-status {
            min-height: 34px;
            font-size: 0.78rem;
            line-height: 1.4;
            color: var(--sub-text);
            text-align: center;
            letter-spacing: 0.01em;
        }

#loginQrGroup {
    margin-bottom: 10px;
}

#loginQrGroup .auth-qr-login-card {
    gap: 0;
    align-items: center;
}


        /* Mnemonic Grid */
        .mnemonic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 8px;
            margin-bottom: 5px;
        }
        @media (min-width: 480px) {
            .mnemonic-grid { grid-template-columns: repeat(3, 1fr); }
        }
        .mnemonic-word-wrap {
            position: relative;
            display: flex;
            align-items: center;
        }
        .mnemonic-num {
            position: absolute;
            left: 8px;
            font-family: var(--font-mono);
            font-size: 0.6rem;
            color: var(--sub-text);
            pointer-events: none;
            user-select: none;
        }
        .mnemonic-word-input {
            width: 100%;
            background: var(--surface-2);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 8px 8px 8px 24px;
            color: var(--text);
            font-size: 0.82rem;
            transition:
                background-color var(--dur-quick) var(--ease-quick),
                border-color var(--dur-quick) var(--ease-quick),
                color var(--dur-quick) var(--ease-quick),
                box-shadow var(--dur-quick) var(--ease-quick);
        }
        .mnemonic-word-input:focus {
            border-color: var(--text);
            outline: none;
            background: var(--surface);
        }

        /* Auth footer */
        .auth-footer {
            margin-top: 48px;
            padding-top: 18px;
            border-top: 1px solid var(--rule);
            display: flex;
            justify-content: space-between;
            font-family: var(--font-mono);
            font-size: 0.62rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--ink-mute);
        }

        /* Trust device checkbox — filled square with check */
.auth-trust-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
            font-size: 13px;
            color: var(--ink-mute);
            cursor: pointer;
    position: relative;
    top: 0;
}
        .auth-trust-row > span:last-child {
            display: inline-flex;
            align-items: center;
            min-height: 16px;
        }
        .auth-trust-checkbox {
            position: absolute;
            opacity: 0;
            width: 0;
            height: 0;
        }
        .auth-trust-box {
            width: 16px;
            height: 16px;
            border: 1px solid var(--ink);
            border-radius: 3px;
            background: var(--ink);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg);
            font-size: 11px;
            line-height: 1;
            flex-shrink: 0;
            transition: background var(--dur-instant);
        }
        .auth-trust-box .sun-check-glyph {
            width: 10px;
            height: 10px;
        }
        .auth-trust-checkbox:not(:checked) + .auth-trust-box {
            background: transparent;
            color: transparent;
        }
        .auth-trust-checkbox:focus-visible + .auth-trust-box {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* Primary button arrow */
        .auth-btn-arrow {
            font-size: 14px;
            line-height: 1;
        }

        /* CTA button now justify-between */
        .auth-btn-primary {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .auth-success-overlay {
            position: fixed;
            inset: 0;
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            background: color-mix(in srgb, var(--bg, #f3f0e8) 96%, transparent);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--dur-slow) var(--ease-quick);
        }

        .auth-success-overlay.is-visible {
            opacity: 1;
            pointer-events: auto;
        }

        .auth-success-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 18px;
            padding: 36px 44px;
            transform: translateY(16px) scale(0.96);
            opacity: 0;
            transition: transform var(--dur-slow) var(--ease-quick) 80ms,
                        opacity var(--dur-medium) var(--ease-quick) 80ms;
        }

        .auth-success-overlay.is-visible .auth-success-card {
            transform: translateY(0) scale(1);
            opacity: 1;
        }

        .auth-success-avatar-wrap {
            position: relative;
            width: 116px;
            height: 116px;
        }

        .auth-success-avatar {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            object-fit: cover;
            display: block;
            background: var(--surface-2);
            border: 3px solid color-mix(in srgb, var(--accent, #d4a253) 50%, transparent);
            box-shadow: var(--shadow-md);
        }

        .auth-success-avatar-fallback {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font: 700 42px/1 var(--font, system-ui);
            color: var(--accent, #d4a253);
            background: var(--surface-2);
            border: 3px solid color-mix(in srgb, var(--accent, #d4a253) 50%, transparent);
            box-shadow: var(--shadow-md);
            text-transform: uppercase;
        }

        .auth-success-avatar-fallback[data-avatar-tint="0"] { background: oklch(70% 0.10 200); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="1"] { background: oklch(72% 0.09 30); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="2"] { background: oklch(70% 0.08 140); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="3"] { background: oklch(65% 0.10 280); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="4"] { background: oklch(70% 0.06 80); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="5"] { background: oklch(60% 0.09 320); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="6"] { background: oklch(68% 0.11 100); color: #fff; border-color: transparent; }
        .auth-success-avatar-fallback[data-avatar-tint="7"] { background: oklch(60% 0.08 250); color: #fff; border-color: transparent; }

        .auth-success-check {
            position: absolute;
            right: -6px;
            bottom: -6px;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #16a34a;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 14px rgba(22, 163, 74, 0.26);
            transform: scale(0);
            animation: authSuccessCheckPop var(--dur-slow) var(--ease-quick) var(--dur-slow) forwards;
        }

        .auth-success-check svg {
            width: 22px;
            height: 22px;
        }

        .auth-success-check path {
            fill: none;
            stroke: #fff;
            stroke-width: 2.4;
            stroke-linecap: round;
            stroke-linejoin: round;
            stroke-dasharray: 24;
            stroke-dashoffset: 24;
            animation: authSuccessCheckDraw var(--dur-medium) var(--ease-quick) forwards var(--dur-slow);
        }

        @keyframes authSuccessCheckPop {
            from { transform: scale(0); }
            70%  { transform: scale(1.15); }
            to   { transform: scale(1); }
        }

        @keyframes authSuccessCheckDraw {
            to { stroke-dashoffset: 0; }
        }

        .auth-success-display-name {
            font: 600 22px/1.2 var(--font, system-ui);
            color: var(--text, #15140e);
            text-align: center;
            margin: 0;
        }

        .auth-success-username {
            font: 500 14px/1.2 var(--font, system-ui);
            color: var(--sub-text, #6a6452);
            text-align: center;
            margin: 0;
        }

        .auth-success-greeting {
            font: 500 13px/1.4 var(--font, system-ui);
            color: var(--sub-text, #6a6452);
            text-align: center;
            margin: 4px 0 0;
            letter-spacing: 0.02em;
        }

        @media (prefers-reduced-motion: reduce) {
            .auth-qr-login-ring.is-running .auth-qr-login-ring-progress,
            .auth-qr-login-skeleton,
            .auth-qr-login-code.is-pulsing .auth-qr-login-layer.is-active,
            .auth-qr-login-code canvas,
            .auth-qr-login-code img,
            .auth-success-check,
            .auth-success-check path {
                animation: none !important;
            }
            .auth-success-overlay,
            .auth-success-card {
                transition: opacity var(--dur-quick) var(--ease-quick);
            }
        }

/* Legacy auth styles extracted from static/style.css */
.auth-page-body {
    min-height: 100vh;
    min-height: 100dvh;
    background: var(--auth-bg);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
    overflow-x: hidden;
}

/* Sun mark */
.auth-orb {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}
.auth-orb-1 {
    width: 360px; height: 360px;
    background: var(--accent);
    top: -120px; right: -120px;
    opacity: 0.55;
    filter: blur(0);
}
.auth-orb-2 {
    width: 360px; height: 360px;
    border: 1px solid var(--ink);
    top: -120px; right: -120px;
    opacity: 0.08;
    background: transparent;
}
.auth-orb-3 { display: none; }
.auth-grid { display: none; }

.auth-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 460px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Sun corner eyebrow (top-left) */
.auth-corner-eyebrow {
    position: fixed;
    top: 28px;
    left: 32px;
    display: flex;
    align-items: stretch;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--ink-mute);
    z-index: 5;
}
.auth-corner-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
}

/* Pre-headline eyebrow */
.auth-brand-pre {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
    margin-bottom: 18px;
}

/* Brand */
.auth-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    animation: authSlideDown var(--dur-slow) var(--ease-quick) both;
}
@keyframes authSlideDown {
    from { opacity: 0; transform: translateY(-12px); }
    to   { opacity: 1; transform: translateY(0); }
}
.auth-brand-icon { display: none; }
.auth-brand-name { display: none; }
.auth-brand-tagline {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--sub-text);
    letter-spacing: 0.16em;
    text-transform: uppercase;
}
.auth-brand-headline {
    font-family: var(--font-serif);
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    line-height: 0.98;
    letter-spacing: -0.015em;
    font-weight: 400;
    color: var(--text);
    margin-top: 4px;
}

.auth-brand-headline-em {
    color: var(--ink-soft);
    font-style: italic;
}

/* Auth card */
.auth-card {
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
    animation: authSlideUp var(--dur-slow) var(--ease-quick) both 0.08s;
}
@keyframes authSlideUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Tab switcher */
.auth-tabs {
    display: flex;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 0;
    gap: 0;
    margin-bottom: 28px;
    margin-top: -1px;
}

.auth-tabs--auth {
    margin-top: 36px;
}
.auth-tab-btn {
    flex: 1;
    padding: 14px 0;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 400;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    border: none;
    border-top: 1.5px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition:
        background-color var(--transition),
        color var(--transition),
        border-color var(--transition),
        opacity var(--transition);
    background: transparent;
    color: var(--sub-text);
    margin-top: -1px;
}
.auth-tab-btn.active {
    border-top-color: var(--text);
    color: var(--text);
    background: transparent;
    box-shadow: none;
}
.auth-tab-btn:not(.active):hover {
    color: var(--text);
    background: transparent;
}

/* Auth form elements */
.auth-form-group { margin-bottom: 16px; }
.auth-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--sub-text);
    margin-bottom: 7px;
}
.auth-input-wrap { position: relative; }
.auth-input-icon {
    position: absolute;
    left: 13px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    transition: color var(--transition);
}
.auth-input-icon-top { top: 14px; transform: none; }
.auth-input-wrap:focus-within .auth-input-icon { color: var(--accent); }
.auth-input {
    width: 100%;
    padding: 11px 13px 11px 40px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
#messageInput {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 10px 16px;
    font-size: 14px;
    color: var(--text);
    outline: none;
    transition: var(--transition);
    resize: none;
    max-height: 150px;
    line-height: 1.5;
    font-family: inherit;
}
#messageInput:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.auth-input::placeholder { color: var(--text-muted); }
.auth-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: var(--input-bg);
}

/* Auth button */
.auth-btn {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition:
        background-color var(--transition),
        color var(--transition),
        border-color var(--transition),
        box-shadow var(--transition),
        opacity var(--transition),
        transform var(--dur-instant) var(--ease-quick);
}
.auth-btn-primary {
    background: var(--text);
    color: var(--bg);
    box-shadow: none;
    display: flex;
    align-items: stretch;
    justify-content: space-between;
}
.auth-btn-primary:hover:not(:disabled) {
    opacity: 0.88;
}
.auth-btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }
.auth-btn-secondary {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    justify-content: flex-start;
    gap: 10px;
}
.auth-btn-secondary:hover {
    background: var(--surface-2);
}

/* Login method switcher */
.auth-method-switcher {
    display: flex;
    gap: 2px;
    margin-bottom: 20px;
    background: var(--surface-2);
    border: none;
    border-radius: 8px;
    padding: 3px;
}
.auth-method-btn {
    flex: 1;
    padding: 10px 12px;
    border: none;
    border-radius: 6px;
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition:
        background-color var(--transition),
        color var(--transition),
        box-shadow var(--transition),
        opacity var(--transition);
    background: transparent;
    color: var(--sub-text);
}
.auth-method-btn.active {
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow-1);
}

.auth-login-note {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px;
    margin-bottom: 20px;
    font-size: 0.75rem;
    color: var(--sub-text);
    line-height: 1.4;
}

.auth-login-note--minimal {
    padding: 8px 10px;
    margin-bottom: 14px;
    font-size: 0.72rem;
    line-height: 1.3;
    background: transparent;
    border-color: color-mix(in srgb, var(--border) 72%, transparent);
}

.auth-login-note-icon {
    color: var(--accent);
    margin-right: 4px;
}

.auth-totp-help {
    font-size: 0.75rem;
    color: var(--sub-text);
    margin-top: 8px;
}

.auth-passkey-btn {
    margin-top: 10px;
}

/* Key box (after registration) */
.auth-key-box {
    background: var(--paper);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-2);
    display: none;
    animation: authSlideUp var(--dur-slow) var(--ease-quick) both;
}
.auth-key-box.visible { display: block; }

.auth-key-box-header {
    display: flex;
    align-items: stretch;
    gap: 10px;
    margin-bottom: 14px;
}
.auth-key-box-icon {
    width: 32px; height: 32px;
    border-radius: 8px;
    background: var(--paper-alt);
    border: 1px solid var(--rule);
    display: flex; align-items: stretch; justify-content: center;
    color: var(--ink);
    font-size: 0.9rem; flex-shrink: 0;
}
.auth-key-box-icon.accent {
    background: var(--accent-soft);
    border-color: var(--rule);
    color: var(--accent-deep);
}
.auth-key-box-title { font-size: 0.92rem; font-weight: 600; color: var(--text); }
.auth-key-box-sub   { font-size: 0.75rem; color: var(--sub-text); margin-top: 1px; }

.auth-key-warning {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: transparent;
    border: 1px solid var(--rule);
    border-left: 2px solid var(--ink);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    margin-top: 14px;
}
.auth-key-warning i { color: var(--ink); flex-shrink: 0; margin-top: 1px; }
.auth-key-warning p { font-size: 0.85rem; color: var(--ink-soft); line-height: 1.5; font-style: italic; }
.auth-key-warning p strong { color: var(--ink); font-style: normal; }

.auth-private-key-group {
    margin-bottom: 10px;
}

#privateKeyContent {
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.auth-copy-key-btn {
    width: auto;
    padding: 9px 18px;
    font-size: 0.82rem;
    margin-bottom: 18px;
}

.auth-key-box-header--qr {
    margin-bottom: 12px;
}

.auth-totp-layout {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    flex-wrap: wrap;
}

.auth-totp-qr {
    background: #fff;
    padding: 12px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.auth-totp-copy {
    flex: 1;
    min-width: 180px;
}

.auth-totp-manual-label {
    font-size: 0.72rem;
    color: var(--sub-text);
    margin-bottom: 8px;
}

.auth-theme-toggle-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--sub-text);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.auth-theme-toggle-btn.tg-ripple-host {
    position: fixed;
}

/* Textarea special */
.auth-textarea {
    font-family: var(--font);
    font-size: 0.74rem;
    line-height: 1.6;
    resize: none;
}

/* Auth footer */
.auth-footer {
    text-align: center;
    font-size: 0.72rem;
    color: var(--sub-text);
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 6px;
}
.auth-footer i { color: var(--accent); }

.auth-legal-links {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    align-items: center;
    justify-content: center;
}

.auth-legal-links a {
    font-size: 0.72rem;
    color: var(--sub-text);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color var(--dur-quick) var(--ease-quick), border-color var(--dur-quick) var(--ease-quick);
}

.auth-legal-links a:hover {
    color: var(--text);
    border-color: color-mix(in srgb, var(--text) 35%, transparent);
}

/* Auth spinner */
.auth-spinner {
    display: inline-block;
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spinAnim 0.7s linear infinite;
}
@keyframes spinAnim { to { transform: rotate(360deg); } }

/* Auth toasts (top-right) */
.auth-toast-container {
    position: fixed;
    top: 20px; right: 20px;
    z-index: 9999;
    display: flex; flex-direction: column;
    gap: 10px;
}
.auth-toast {
    background: var(--paper);
    backdrop-filter: none;
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    min-width: 260px; max-width: 360px;
    display: flex; align-items: flex-start; gap: 12px;
    box-shadow: var(--shadow-2);
    animation: toastIn var(--dur-medium) var(--ease-quick) both;
    cursor: pointer;
    pointer-events: auto;
}
.auth-toast-success { border-left: 2px solid var(--success); }
.auth-toast-error   { border-left: 2px solid var(--danger); }
.auth-toast-info    { border-left: 2px solid var(--ink); }
.auth-toast-icon    { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.auth-toast-success .auth-toast-icon { color: var(--success); }
.auth-toast-error   .auth-toast-icon { color: var(--danger); }
.auth-toast-info    .auth-toast-icon { color: var(--accent); }
.auth-toast-text    { font-size: 0.85rem; color: var(--text); line-height: 1.4; }
.auth-toast-brand   { font-size: 0.7rem; color: var(--sub-text); margin-bottom: 2px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; }
.auth-toast-out     { animation: toastOut var(--dur-quick) var(--ease-quick) forwards; }
@keyframes toastIn  { from { opacity: 0; transform: translate3d(36px, 0, 0) scale(0.94); } to { opacity: 1; transform: translate3d(0, 0, 0) scale(1); } }
@keyframes toastOut { to { opacity: 0; transform: translate3d(28px, 0, 0) scale(0.95); } }

@media (max-width: 768px) {
    .auth-wrapper  { max-width: 100%; }
    .auth-card     { padding: 24px 20px; }
    .auth-key-box  { padding: 20px; }
}

@media (max-width: 480px) {
    .auth-card { padding: 20px 16px; }
    .auth-page-body { padding: 20px 12px; }
}

@media (max-width: 360px) {
        .auth-card { padding: 16px 12px; }
}

/* Mobile layout hardening */
@media (max-width: 900px) {
    .auth-wrapper {
        max-width: min(100%, 560px);
    }

    .auth-key-box-title,
    .auth-key-box-sub,
    .auth-key-warning p,
    .qr-instructions,
    .auth-success-greeting,
    .auth-success-username {
        overflow-wrap: anywhere;
        word-break: break-word;
    }
}

.auth-feedback-dock {
    margin-top: 10px;
    border: 1px solid color-mix(in srgb, var(--border) 82%, transparent);
    border-radius: 12px;
    background: color-mix(in srgb, var(--surface) 96%, transparent);
    overflow: hidden;
}

.auth-feedback-summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 0.74rem;
    color: var(--sub-text);
    cursor: pointer;
    user-select: none;
}

.auth-feedback-summary::-webkit-details-marker {
    display: none;
}

.auth-feedback-dock[open] .auth-feedback-summary {
    border-bottom: 1px solid color-mix(in srgb, var(--border) 82%, transparent);
}

.auth-feedback-panel {
    padding: 10px;
}

.auth-support-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.auth-support-input-full {
    grid-column: 1 / -1;
}

.auth-support-input {
    min-height: 44px;
}

.auth-support-input.auth-input {
    padding: 11px 12px;
}

.auth-support-actions {
    margin-top: 8px;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.auth-support-status {
    margin-top: 8px;
    min-height: 18px;
    font-size: 0.77rem;
    color: var(--sub-text);
}

@media (max-width: 640px) {
    .auth-page-body {
        padding: 74px 12px 24px;
    }

    .auth-corner-eyebrow {
        top: 12px;
        left: 12px;
        gap: 6px;
        font-size: 9px;
        letter-spacing: 0.12em;
    }

    .auth-corner-dot {
        width: 12px;
        height: 12px;
    }

    .auth-language-switch {
        top: 10px;
        right: 10px;
        z-index: 120;
    }

    .auth-brand-pre {
        font-size: 9px;
        letter-spacing: 0.12em;
        margin-bottom: 12px;
    }

    .auth-brand-headline {
        font-size: clamp(1.7rem, 9vw, 2.3rem);
        line-height: 1.04;
    }

    .auth-tabs {
        margin-top: 14px;
        margin-bottom: 18px;
    }

    .auth-tab-btn {
        font-size: 0.64rem;
        letter-spacing: 0.1em;
        padding: 12px 0;
    }

    .auth-method-btn {
        min-width: 0;
        font-size: 0.78rem;
    }

    .totp-input {
        font-size: 1.12rem !important;
        letter-spacing: 0.18em;
    }

    .auth-qr-login-code {
        width: min(100%, 300px);
        min-height: 336px;
    }

    #loginQrGroup .auth-qr-login-code canvas,
    #loginQrGroup .auth-qr-login-code img {
        width: min(100%, 300px);
    }

    .auth-trust-row {
        margin-top: 12px;
    }

    .auth-footer {
        flex-wrap: wrap;
        justify-content: flex-start;
        gap: 6px 12px;
        line-height: 1.4;
    }

    .auth-legal-links {
        justify-content: flex-start;
    }

    .auth-support-grid {
        grid-template-columns: 1fr;
    }

    .auth-support-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .auth-toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
        gap: 8px;
    }

    .auth-toast {
        min-width: 0;
        max-width: none;
        width: 100%;
        padding: 12px 14px;
    }

    .auth-success-card {
        width: min(100%, calc(100vw - 24px));
        padding: 24px 18px;
    }

    #themeToggleBtn {
        right: 12px;
        bottom: 12px;
    }
}

@media (max-width: 420px) {
    .auth-tabs {
        margin-top: 10px;
    }

    .auth-method-switcher {
        flex-wrap: wrap;
    }

    .auth-method-btn {
        flex: 1 1 100%;
    }

    .auth-trust-row {
        align-items: flex-start;
        top: 0;
        margin-top: 10px;
    }

    .auth-trust-row > span:last-child {
        line-height: 1.35;
    }
}