@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
    --bg: #0c0e12;
    --surface: #14171e;
    --surface2: #1a1e28;
    --border: #252a35;
    --border-light: #333a48;
    --text: #d4d8e0;
    --dim: #6b7280;
    --accent: #c9a55a;
    --accent-dim: #9e7c34;
    --danger: #e05252;
    --radius: 6px;
    --success-color: #5a9e6f;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Noto Serif SC', serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(ellipse 600px 400px at 20% 30%, rgba(201,165,90,.06), transparent),
        radial-gradient(ellipse 500px 500px at 80% 70%, rgba(100,120,180,.05), transparent);
    background-attachment: fixed;
}

/* ── Topbar ─────────────────────────────────────── */

.topbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(12,14,18,.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.topbar-inner {
    max-width: 860px; margin: 0 auto;
    padding: 12px 24px;
    display: flex; justify-content: space-between; align-items: center;
}
.topbar-brand {
    font-size: 1.05rem; font-weight: 700;
    color: var(--accent);
    letter-spacing: .5px;
}

/* ── Container ──────────────────────────────────── */

.container {
    max-width: 860px; margin: 0 auto;
    padding: 24px 24px 60px;
}

.page-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 20px;
}
.page-title { font-size: 1.15rem; font-weight: 700; color: var(--accent); }

/* ── Cards ──────────────────────────────────────── */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 20px;
    overflow: hidden;
    transition: border-color .15s;
}
.card:hover { border-color: var(--border-light); }

.card-header {
    background: var(--surface2);
    padding: 14px 18px;
    display: flex; justify-content: space-between; align-items: center;
    cursor: pointer; user-select: none;
    gap: 12px;
}
.card-header-left {
    display: flex; align-items: center; gap: 10px;
    min-width: 0;
}
.card-header-right {
    display: flex; gap: 8px; flex-shrink: 0;
}
.card-chevron {
    color: var(--dim); transition: transform .2s;
    font-size: .85rem; flex-shrink: 0;
}
.card-header.open .card-chevron { transform: rotate(90deg); }

.smtp-email {
    font-weight: 600; font-size: .95rem;
    word-break: break-all;
}
.smtp-remark {
    margin-left: 8px; font-size: .8rem; color: var(--dim);
}

.badge {
    font-size: .72rem; color: var(--dim);
    background: var(--bg);
    padding: 3px 8px; border-radius: 10px;
    white-space: nowrap;
}

.card-body { padding: 18px; }
.card-body.collapsed { display: none; }

/* ── SMTP Info bar ──────────────────────────────── */

.smtp-info-bar {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap; gap: 10px;
}
.smtp-info-items { display: flex; gap: 8px; flex-wrap: wrap; }
.smtp-actions { display: flex; gap: 6px; }

.info-chip {
    font-size: .78rem; color: var(--dim);
    border: 1px solid var(--border); border-radius: 4px;
    padding: 2px 8px;
}
.info-chip.small { font-size: .72rem; }

/* ── Usage summary ──────────────────────────────── */

.usage-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}
.usage-item {
    text-align: center;
    background: var(--bg);
    border-radius: var(--radius);
    padding: 12px 8px;
}
.usage-val {
    font-size: 1.3rem; font-weight: 700; color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
}
.usage-val.fail { color: var(--danger); }
.usage-val small {
    font-size: .75rem; color: var(--danger); font-weight: 400;
}
.usage-label { font-size: .72rem; color: var(--dim); margin-top: 2px; }

/* ── Chart ──────────────────────────────────────── */

.chart-section { margin-bottom: 16px; }
.chart-controls {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 8px;
}
.chart-title { font-size: .85rem; font-weight: 600; color: var(--dim); }
.chart-range {
    background: var(--bg); color: var(--text); border: 1px solid var(--border);
    border-radius: 4px; padding: 4px 8px; font-size: .78rem;
    font-family: 'Noto Serif SC', serif; cursor: pointer;
}
.chart-range:focus { outline: none; border-color: var(--accent); }
.chart-wrap {
    background: var(--bg); border-radius: var(--radius);
    padding: 12px; height: 200px; position: relative;
}

/* ── Keys ───────────────────────────────────────── */

.keys-section { border-top: 1px solid var(--border); padding-top: 16px; }
.keys-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 12px;
}
.keys-title { font-size: .9rem; font-weight: 600; }

.key-row {
    display: flex; justify-content: space-between; align-items: flex-start;
    padding: 12px;
    background: var(--bg); border-radius: var(--radius);
    margin-bottom: 8px;
    gap: 12px;
}
.key-main { min-width: 0; flex: 1; }
.key-value-row { display: flex; align-items: center; gap: 6px; }
.key-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: .78rem; color: var(--accent);
    word-break: break-all;
}
.key-meta {
    display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; align-items: center;
}
.key-remark { font-size: .75rem; color: var(--dim); }
.key-actions {
    display: flex; gap: 6px; flex-shrink: 0;
    flex-wrap: wrap; justify-content: flex-end;
}

/* ── Buttons ────────────────────────────────────── */

.btn {
    font-family: 'Noto Serif SC', serif;
    font-size: .82rem; font-weight: 600;
    padding: 7px 14px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: transparent; color: var(--text);
    cursor: pointer; transition: all .15s;
    white-space: nowrap;
}
.btn:hover { background: var(--surface2); border-color: var(--accent-dim); }

.btn-primary {
    background: var(--accent); color: #0c0e12;
    border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-dim); border-color: var(--accent-dim); }

.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: rgba(224,82,82,.12); }

.btn-sm { font-size: .75rem; padding: 5px 10px; }
.btn-block { width: 100%; }

.btn-icon {
    background: none; border: none; color: var(--dim);
    cursor: pointer; font-size: 1rem; padding: 2px;
    transition: color .15s;
}
.btn-icon:hover { color: var(--accent); }

/* ── Forms ──────────────────────────────────────── */

.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: .8rem; color: var(--dim); margin-bottom: 5px; }
.form-input {
    width: 100%;
    background: var(--bg); color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 9px 12px;
    font-family: 'Noto Serif SC', serif;
    font-size: .88rem;
    transition: border-color .15s;
}
.form-input:focus { outline: none; border-color: var(--accent); }
.form-input::placeholder { color: var(--dim); opacity: .6; }

.mono-input { font-family: 'JetBrains Mono', monospace; letter-spacing: 2px; }

.form-row { display: flex; gap: 12px; }
.flex-1 { flex: 1; }

.input-with-btn { display: flex; gap: 8px; }
.input-with-btn .form-input { flex: 1; }

/* ── Modal ──────────────────────────────────────── */

.modal { display: none; position: fixed; inset: 0; z-index: 200; align-items: center; justify-content: center; }
.modal.active { display: flex; }
.modal-overlay {
    position: absolute; inset: 0;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.modal-box {
    position: relative;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px 28px 24px;
    width: calc(100% - 48px); max-width: 480px;
    box-shadow: 0 24px 64px rgba(0,0,0,.6);
    max-height: calc(100vh - 80px); overflow-y: auto;
}
.modal-wide { max-width: 600px; }
.modal-title { font-size: 1rem; font-weight: 700; color: var(--accent); margin-bottom: 18px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

/* ── Alert ──────────────────────────────────────── */

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: .85rem;
    margin-bottom: 14px;
}
.alert-danger {
    background: rgba(224,82,82,.1); color: var(--danger);
    border: 1px solid rgba(224,82,82,.25);
}

/* ── Toast ──────────────────────────────────────── */

.toast {
    position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
    background: var(--surface2); color: var(--text);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 10px 20px;
    font-size: .82rem;
    box-shadow: 0 8px 24px rgba(0,0,0,.4);
    opacity: 0; pointer-events: none;
    transition: opacity .25s;
    z-index: 300;
}
.toast.show { opacity: 1; }

/* ── Empty state ────────────────────────────────── */

.empty-state {
    text-align: center; padding: 48px 20px;
    color: var(--dim);
}
.empty-state .btn { margin-top: 16px; }

.dim-text { font-size: .82rem; color: var(--dim); }

/* ── Login ──────────────────────────────────────── */

.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; padding: 24px;
}
.login-container { width: 100%; max-width: 380px; }
.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 36px 28px 28px;
    text-align: center;
}
.login-icon { font-size: 2.2rem; margin-bottom: 8px; }
.login-title { font-size: 1.3rem; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.login-subtitle { font-size: .85rem; color: var(--dim); margin-bottom: 24px; }
.login-form { text-align: left; }
.login-form .form-input {
    text-align: center; font-size: 1.2rem;
    letter-spacing: 4px; padding: 12px;
}
.login-form .btn-block { margin-top: 14px; padding: 11px; font-size: .9rem; }
.login-hint {
    font-size: .72rem; color: var(--dim);
    margin-top: 18px;
}

/* ── Scrollbar ──────────────────────────────────── */

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

/* ── Mobile ─────────────────────────────────────── */

@media (max-width: 640px) {
    .container { padding: 16px 14px 48px; }
    .topbar-inner { padding: 10px 14px; }

    .card-header { padding: 12px 14px; flex-direction: column; align-items: flex-start; gap: 6px; }
    .card-header-right { align-self: flex-end; }
    .card-body { padding: 14px; }

    .smtp-info-bar { flex-direction: column; align-items: flex-start; }

    .usage-summary { grid-template-columns: repeat(2, 1fr); gap: 8px; }

    .key-row { flex-direction: column; }
    .key-actions { align-self: flex-end; }

    .form-row { flex-direction: column; gap: 0; }

    .modal-box { padding: 22px 18px 18px; }

    .page-header { flex-wrap: wrap; gap: 10px; }

    .chart-wrap { height: 180px; }

    .smtp-remark { display: block; margin-left: 0; margin-top: 2px; }
}