:root {
    --bg: #111312;
    --surface: #181b1a;
    --surface-2: #202423;
    --surface-3: #272d2b;
    --border: #343b38;
    --border-strong: #4b5651;
    --text: #eef3ef;
    --muted: #a5b0aa;
    --soft: #78847e;
    --accent: #1f9d86;
    --accent-hover: #27b99f;
    --accent-soft: rgba(31, 157, 134, 0.14);
    --warning: #d5a12a;
    --warning-soft: rgba(213, 161, 42, 0.15);
    --danger: #e0524d;
    --danger-soft: rgba(224, 82, 77, 0.15);
    --success: #38ad64;
    --success-soft: rgba(56, 173, 100, 0.15);
    --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
    --radius: 8px;
    --font-mono: "Cascadia Code", "JetBrains Mono", Consolas, monospace;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 15px;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.5;
}

button,
input {
    font: inherit;
}

.hidden {
    display: none !important;
}

.muted {
    color: var(--muted);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(17, 19, 18, 0.94);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}

.topbar-inner {
    max-width: 1180px;
    height: 64px;
    margin: 0 auto;
    padding: 0 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.app-title {
    font-weight: 700;
    font-size: 1.12rem;
}

.app-subtitle {
    color: var(--muted);
    font-size: 0.82rem;
    margin-top: 2px;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.page {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 22px 48px;
}

.login-panel {
    min-height: calc(100vh - 126px);
    display: grid;
    place-items: center;
}

.login-box,
.status-board {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.login-box {
    width: min(520px, 100%);
    padding: 24px;
}

.field-label {
    display: block;
    color: var(--muted);
    font-size: 0.92rem;
    margin-bottom: 8px;
}

.login-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.text-input {
    width: 100%;
    min-width: 0;
    height: 42px;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0 12px;
    outline: none;
}

.text-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn,
.link-button {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    padding: 8px 14px;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
    transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn:disabled {
    opacity: 0.62;
    cursor: wait;
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-secondary,
.link-button {
    background: var(--surface-2);
    border-color: var(--border);
    color: var(--text);
}

.btn-secondary:hover,
.link-button:hover {
    background: var(--surface-3);
    border-color: var(--border-strong);
}

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
}

.btn-small {
    min-height: 32px;
    padding: 5px 10px;
    font-size: 0.86rem;
}

.btn-wide {
    width: 100%;
}

.user-chip,
.counter-chip {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    border-radius: 999px;
    padding: 4px 10px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--muted);
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.workspace {
    display: grid;
    gap: 22px;
}

.section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.section-head h1,
.section-head h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

.section-head p {
    margin: 5px 0 0;
    color: var(--muted);
}

.section-head-compact {
    align-items: center;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.mailbox-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.mailbox-card,
.request-card,
.admin-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.mailbox-card {
    min-height: 252px;
    padding: 16px;
    display: grid;
    grid-template-rows: auto minmax(42px, 1fr) auto auto;
    gap: 14px;
}

.mailbox-meta,
.request-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--muted);
    font-size: 0.84rem;
}

.mailbox-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mailbox-email,
.request-email {
    font-family: var(--font-mono);
    overflow-wrap: anywhere;
}

.mailbox-email {
    align-self: center;
    font-size: 1rem;
}

.quota-panel {
    display: grid;
    gap: 8px;
    margin-top: -2px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.quota-title,
.quota-row-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.quota-title {
    color: var(--muted);
    font-size: 0.82rem;
}

.quota-status {
    color: var(--soft);
}

.quota-row {
    display: grid;
    gap: 5px;
}

.quota-row-head {
    color: var(--muted);
    font-size: 0.8rem;
}

.quota-row-head strong {
    color: var(--text);
    font-family: var(--font-mono);
}

.quota-track {
    height: 7px;
    overflow: hidden;
    background: var(--surface-3);
    border-radius: 999px;
}

.quota-fill {
    height: 100%;
    border-radius: inherit;
    transition: width 0.2s ease;
}

.quota-ok {
    background: var(--success);
}

.quota-warning {
    background: var(--warning);
}

.quota-danger {
    background: var(--danger);
}

.quota-unknown {
    background: var(--soft);
}

.quota-loading,
.quota-error {
    color: var(--muted);
    font-size: 0.84rem;
}

.quota-error {
    color: #ff8b87;
}

.quota-warning-text {
    color: #e7bf57;
    font-size: 0.78rem;
}

.mode-pill,
.status-pill {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    border-radius: 999px;
    padding: 2px 9px;
    font-size: 0.78rem;
    font-weight: 650;
}

.mode-direct {
    background: var(--accent-soft);
    color: #66d7c6;
}

.mode-forwarded {
    background: var(--warning-soft);
    color: #e7bf57;
}

.status-warning {
    background: var(--warning-soft);
    color: #e7bf57;
}

.status-success {
    background: var(--success-soft);
    color: #65d28b;
}

.status-danger {
    background: var(--danger-soft);
    color: #ff8b87;
}

.status-board {
    padding: 18px;
}

.request-list,
.admin-list {
    display: grid;
    gap: 12px;
}

.request-card,
.admin-card {
    padding: 14px;
}

.request-main,
.admin-card-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 14px;
}

.code-box {
    margin-top: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
}

.code-box span,
.code-inline {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
}

.code-inline {
    margin-top: 12px;
}

.mail-summary {
    margin-top: 10px;
    display: grid;
    gap: 4px;
    color: var(--muted);
    font-size: 0.86rem;
}

.error-line,
.form-error {
    color: #ff8b87;
}

.error-line {
    margin-top: 10px;
}

.form-error {
    margin-top: 10px;
    font-size: 0.9rem;
}

.admin-page {
    display: grid;
    gap: 22px;
}

.admin-actions {
    margin-top: 14px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.empty,
.loading {
    min-height: 86px;
    display: grid;
    place-items: center;
    color: var(--muted);
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 18px;
    text-align: center;
}

.empty-error {
    color: #ff8b87;
}

.toast-area {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 40;
    display: grid;
    gap: 10px;
}

.toast {
    max-width: min(360px, calc(100vw - 36px));
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: var(--radius);
    padding: 11px 12px;
    box-shadow: var(--shadow);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast-success {
    border-left-color: var(--success);
}

.toast-error {
    border-left-color: var(--danger);
}

.toast-hide {
    opacity: 0;
    transform: translateY(8px);
}

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, 0.58);
    padding: 18px;
}

.code-modal {
    width: min(460px, 100%);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}

.modal-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 14px;
}

.modal-title {
    font-size: 1.12rem;
    font-weight: 750;
}

.modal-subtitle {
    margin-top: 4px;
    color: var(--muted);
    font-family: var(--font-mono);
    overflow-wrap: anywhere;
}

.icon-button {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-2);
    color: var(--text);
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
}

.icon-button:hover {
    background: var(--surface-3);
}

.modal-code {
    margin: 18px 0 12px;
    padding: 16px;
    border-radius: var(--radius);
    background: var(--surface-2);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 2.2rem;
    line-height: 1.1;
    font-weight: 850;
    text-align: center;
    letter-spacing: 0;
    overflow-wrap: anywhere;
}

.modal-summary {
    display: grid;
    gap: 5px;
    color: var(--muted);
    font-size: 0.9rem;
}

.modal-actions {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
}

@media (max-width: 960px) {
    .mailbox-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .topbar-inner,
    .page {
        padding-left: 14px;
        padding-right: 14px;
    }

    .topbar-inner {
        height: auto;
        min-height: 64px;
        align-items: flex-start;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .topbar-actions {
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .login-row,
    .mailbox-grid {
        grid-template-columns: 1fr;
    }

    .section-head,
    .request-main,
    .admin-card-main {
        flex-direction: column;
        align-items: stretch;
    }

    .admin-actions,
    .code-box {
        flex-direction: column;
        align-items: stretch;
    }

    .btn,
    .link-button {
        width: 100%;
    }
}