:root {
    --login-ink: #0f172a;
    --login-muted: #64748b;
    --login-line: #dbe6f3;
    --login-card: rgba(255, 255, 255, .88);
    --login-primary: var(--login-button-color, #2563eb);
    --login-radius: 24px;
    --login-shadow: 0 28px 80px rgba(15, 23, 42, .16);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body.geo-login-page {
    min-height: 100vh;
    overflow: hidden;
    color: var(--login-ink);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    background:
        radial-gradient(circle at 22% 14%, rgba(37, 99, 235, .16), transparent 34%),
        radial-gradient(circle at 82% 78%, rgba(8, 145, 178, .14), transparent 32%),
        var(--login-bg-custom, linear-gradient(135deg, #f8fbff 0%, #eef6ff 48%, #f7fbfa 100%));
}

.geo-login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: clamp(18px, 4vw, 48px);
}

.geo-login-card {
    width: min(100%, 460px);
    max-height: calc(100vh - 40px);
    overflow: auto;
    border: 1px solid rgba(148, 163, 184, .26);
    border-radius: var(--login-radius);
    background: var(--login-card);
    box-shadow: var(--login-shadow);
    backdrop-filter: blur(18px);
    padding: clamp(24px, 4vw, 36px);
}

.geo-login-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 24px;
}
.geo-login-brand img {
    max-height: 40px;
    max-width: 180px;
    object-fit: contain;
}
.geo-login-brand strong { font-size: 22px; letter-spacing: 0; }
.geo-login-mark {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: linear-gradient(135deg, #e0f2fe, #dbeafe);
    color: #0891b2;
}

.geo-login-copy { text-align: center; margin-bottom: 22px; }
.geo-login-kicker {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid rgba(37, 99, 235, .22);
    background: rgba(239, 246, 255, .82);
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 700;
}
.geo-login-copy h1 {
    margin: 14px 0 8px;
    font-size: clamp(26px, 5vw, 34px);
    line-height: 1.15;
    letter-spacing: 0;
}
.geo-login-copy p {
    margin: 0;
    color: var(--login-muted);
    font-size: 14px;
    line-height: 1.7;
}

.geo-login-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 18px;
    padding: 5px;
    border-radius: 16px;
    background: #f1f5f9;
}
.geo-login-tabs button {
    border: 0;
    border-radius: 12px;
    background: transparent;
    color: #475569;
    min-height: 40px;
    font-weight: 700;
    cursor: pointer;
}
.geo-login-tabs button.is-active {
    background: #fff;
    color: #0f172a;
    box-shadow: 0 8px 20px rgba(15, 23, 42, .08);
}
.geo-login-tabs button:disabled { opacity: .45; cursor: not-allowed; }

.geo-login-message {
    margin-bottom: 14px;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid #bfdbfe;
    background: #eff6ff;
    color: #1e40af;
    font-size: 13px;
    line-height: 1.55;
}
.geo-login-message.is-error { border-color: #fecdd3; background: #fff1f2; color: #be123c; }
.geo-login-message.is-success { border-color: #bbf7d0; background: #f0fdf4; color: #047857; }

.geo-login-form { display: none; gap: 14px; }
.geo-login-form.is-active { display: grid; }
.geo-login-form label { display: grid; gap: 7px; margin: 0; }
.geo-login-form label span {
    font-size: 13px;
    font-weight: 700;
    color: #334155;
}
.geo-login-form input {
    width: 100%;
    height: 48px;
    border: 1px solid var(--login-line);
    border-radius: 14px;
    background: #fff;
    color: var(--login-ink);
    padding: 0 14px;
    font-size: 15px;
    outline: none;
    transition: border-color .18s ease, box-shadow .18s ease;
}
.geo-login-form input:focus {
    border-color: rgba(37, 99, 235, .62);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
}
.geo-code-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 124px;
    gap: 10px;
    align-items: end;
}
.geo-code-btn,
.geo-login-submit {
    height: 48px;
    border-radius: 14px;
    border: 0;
    cursor: pointer;
    font: var(--login-button-font, 600 15px system-ui);
}
.geo-code-btn {
    border: 1px solid rgba(37, 99, 235, .24);
    background: #eff6ff;
    color: #1d4ed8;
}
.geo-code-btn:disabled { opacity: .62; cursor: not-allowed; }
.geo-login-submit {
    margin-top: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: 100%;
    background: linear-gradient(135deg, var(--login-primary), #0891b2);
    color: #fff;
    box-shadow: 0 16px 28px rgba(37, 99, 235, .24);
}
.geo-login-submit:disabled { opacity: .7; cursor: wait; }
.geo-login-note {
    margin-top: 18px;
    display: flex;
    justify-content: center;
    gap: 8px;
    color: var(--login-muted);
    font-size: 12px;
    line-height: 1.6;
    text-align: center;
}
.geo-spinner {
    width: 15px;
    height: 15px;
    border: 2px solid rgba(255,255,255,.45);
    border-top-color: #fff;
    border-radius: 999px;
    animation: geoSpin .8s linear infinite;
}
@keyframes geoSpin { to { transform: rotate(360deg); } }

.login-settings-page {
    width: min(100%, 1440px);
    margin: 0 auto;
}
.login-settings-page .settings-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 18px;
    align-items: start;
}
.login-settings-card {
    border: 1px solid #dbe6f3;
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 18px 44px rgba(15, 23, 42, .06);
    padding: 22px;
}
.login-settings-card h2 {
    margin: 0 0 6px;
    font-size: 20px;
    font-weight: 800;
}
.login-settings-card p {
    margin: 0 0 18px;
    color: #64748b;
    font-size: 13px;
}
.login-settings-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}
.login-settings-grid .full { grid-column: 1 / -1; }
.login-settings-card label {
    display: grid;
    gap: 7px;
    font-size: 13px;
    font-weight: 700;
    color: #334155;
}
.login-settings-card input,
.login-settings-card select,
.login-settings-card textarea {
    width: 100%;
    min-height: 42px;
    border: 1px solid #d8e3f2;
    border-radius: 12px;
    padding: 9px 12px;
    font-size: 14px;
    outline: none;
}
.login-settings-card textarea { min-height: 96px; resize: vertical; }
.login-settings-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 18px;
}
.login-preview-card {
    position: sticky;
    top: 88px;
}
.login-preview-window {
    border-radius: 18px;
    padding: 22px;
    background: linear-gradient(135deg, #f8fbff, #eef6ff);
    border: 1px solid #dbe6f3;
}
.login-preview-mini {
    margin: 0 auto;
    max-width: 280px;
    border-radius: 18px;
    background: rgba(255,255,255,.9);
    padding: 20px;
    text-align: center;
}
.login-test-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    margin-top: 12px;
}

@media (max-width: 860px) {
    body.geo-login-page { overflow: auto; }
    .geo-login-shell { align-items: start; padding: 14px; }
    .geo-login-card { max-height: none; border-radius: 20px; padding: 22px; }
    .geo-login-tabs { grid-template-columns: 1fr; }
    .geo-code-row { grid-template-columns: 1fr; }
    .login-settings-page .settings-shell { grid-template-columns: 1fr; }
    .login-preview-card { position: static; }
    .login-settings-grid { grid-template-columns: 1fr; }
}

/* Phase 4.3: unified login visual system */
:root {
    --login-ink: #1F4E79;
    --login-muted: #6B7280;
    --login-line: #E2E8F0;
    --login-card: #FFFFFF;
    --login-primary: var(--login-button-color, #1F4E79);
    --login-secondary: #3BA99C;
    --login-accent: #F29D35;
    --login-bg: #F8FAFB;
    --login-radius: 8px;
    --login-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body.geo-login-page {
    color: var(--login-ink);
    background:
        radial-gradient(circle at 18% 16%, rgba(59, 169, 156, .16), transparent 30%),
        radial-gradient(circle at 82% 82%, rgba(31, 78, 121, .12), transparent 34%),
        var(--login-bg-custom, linear-gradient(135deg, #F8FAFB 0%, #EEF5F7 100%));
}

.geo-login-card {
    border-color: var(--login-line);
    border-radius: var(--login-radius);
    background: var(--login-card);
    box-shadow: var(--login-shadow);
    backdrop-filter: none;
}

.geo-login-brand strong,
.geo-login-copy h1,
.login-settings-card h2 {
    color: var(--login-ink);
}

.geo-login-mark {
    border-radius: var(--login-radius);
    color: #fff;
    background: linear-gradient(135deg, #1F4E79, #3BA99C);
}

.geo-login-kicker {
    color: var(--login-secondary);
    border-color: rgba(59, 169, 156, .26);
    background: rgba(59, 169, 156, .1);
}

.geo-login-copy p,
.geo-login-note,
.login-settings-card p {
    color: var(--login-muted);
}

.geo-login-tabs {
    border-radius: var(--login-radius);
    background: var(--login-bg);
    border: 1px solid var(--login-line);
}

.geo-login-tabs button {
    border-radius: var(--login-radius);
    color: var(--login-muted);
}

.geo-login-tabs button.is-active {
    color: var(--login-ink);
    box-shadow: 0 4px 12px rgba(31, 78, 121, .08);
}

.geo-login-message {
    border-radius: var(--login-radius);
    border-color: rgba(31, 78, 121, .18);
    background: rgba(31, 78, 121, .08);
    color: var(--login-ink);
}

.geo-login-message.is-success {
    border-color: rgba(59, 169, 156, .26);
    background: rgba(59, 169, 156, .1);
    color: #157A70;
}

.geo-login-message.is-error {
    border-color: #FCA5A5;
    background: #FEF2F2;
    color: #B91C1C;
}

.geo-login-form label span,
.login-settings-card label {
    color: var(--login-ink);
}

.geo-login-form input,
.login-settings-card input,
.login-settings-card select,
.login-settings-card textarea {
    border-color: var(--login-line);
    border-radius: var(--login-radius);
    background: var(--login-bg);
    color: #334155;
}

.geo-login-form input:focus,
.login-settings-card input:focus,
.login-settings-card select:focus,
.login-settings-card textarea:focus {
    border-color: var(--login-secondary);
    box-shadow: 0 0 0 3px rgba(59, 169, 156, .16);
    background: #fff;
}

.geo-code-btn,
.geo-login-submit {
    border-radius: var(--login-radius);
}

.geo-code-btn {
    border-color: rgba(59, 169, 156, .28);
    background: rgba(59, 169, 156, .1);
    color: var(--login-secondary);
}

.geo-login-submit {
    background: linear-gradient(135deg, var(--login-primary), #173B5C);
    box-shadow: 0 10px 20px rgba(31, 78, 121, .2);
}

.geo-login-submit:hover {
    background: linear-gradient(135deg, #173B5C, #102E49);
}

.login-settings-card,
.login-preview-window,
.login-preview-mini {
    border-color: var(--login-line);
    border-radius: var(--login-radius);
    box-shadow: var(--login-shadow);
}

.login-preview-window {
    background: linear-gradient(135deg, #F8FAFB, #EFF6F7);
}

@media (max-width: 860px) {
    .geo-login-card {
        border-radius: var(--login-radius);
    }
}

/* Phase 4.2.1: premium teal login palette */
:root {
    --login-ink: #0F172A;
    --login-muted: #64748B;
    --login-line: #E2E8F0;
    --login-card: #FFFFFF;
    --login-primary: var(--login-button-color, #0F766E);
    --login-secondary: #115E59;
    --login-soft: #CCFBF1;
    --login-weak: #F0FDFA;
    --login-bg: #F6F8FB;
    --login-focus-ring: rgba(15, 118, 110, 0.22);
    --login-radius: 8px;
    --login-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

body.geo-login-page {
    color: var(--login-ink);
    background:
        radial-gradient(circle at 18% 18%, rgba(204, 251, 241, .9), transparent 30%),
        radial-gradient(circle at 84% 78%, rgba(15, 118, 110, .08), transparent 34%),
        var(--login-bg-custom, linear-gradient(135deg, #F0FDFA 0%, #FFFFFF 52%, #F8FAFC 100%));
}

.geo-login-card {
    border-color: var(--login-line);
    background: var(--login-card);
    box-shadow: var(--login-shadow);
}

.geo-login-brand strong,
.geo-login-copy h1,
.login-settings-card h2,
.geo-login-form label span,
.login-settings-card label {
    color: var(--login-ink);
}

.geo-login-mark {
    color: #fff;
    background: #0F766E;
    box-shadow: inset 0 0 0 5px rgba(255, 255, 255, .16), 0 8px 16px rgba(15, 118, 110, .14);
}

.geo-login-kicker,
.geo-code-btn {
    color: #0F766E;
    border-color: var(--login-soft);
    background: var(--login-weak);
}

.geo-login-tabs {
    background: #F8FAFC;
    border-color: var(--login-line);
}

.geo-login-tabs button {
    color: #334155;
}

.geo-login-tabs button.is-active {
    color: #0F766E;
    box-shadow: 0 6px 16px rgba(15, 23, 42, .05);
}

.geo-login-form input,
.login-settings-card input,
.login-settings-card select,
.login-settings-card textarea {
    color: #0F172A;
    border-color: var(--login-line);
    background: #F8FAFC;
}

.geo-login-form input:focus,
.login-settings-card input:focus,
.login-settings-card select:focus,
.login-settings-card textarea:focus {
    border-color: #0F766E;
    box-shadow: 0 0 0 3px var(--login-focus-ring);
    background: #fff;
}

.geo-login-submit {
    background: #0F766E;
    box-shadow: 0 10px 22px rgba(15, 118, 110, .18);
}

.geo-login-submit:hover {
    background: #115E59;
}

.geo-login-message {
    border-color: var(--login-soft);
    background: var(--login-weak);
    color: #0F766E;
}

.login-preview-window {
    border-color: var(--login-line);
    background: linear-gradient(135deg, #F0FDFA, #FFFFFF 56%, #F8FAFC);
}