:root {
    --bg: #eef2ec;
    --ink: #1a221a;
    --muted: #667066;
    --panel: #fffdf9;
    --line: #d5dcd3;
    --accent: #2f5d3a;
    --accent-ink: #f4fff6;
    --danger: #8f3030;
    --ok: #2f5d3a;
    --side: #1f2a22;
    --side-ink: #e7eee7;
    --soft: #f4f7f2;
    --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: "Cascadia Mono", "Consolas", "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: var(--font);
    color: var(--ink);
    background:
        radial-gradient(circle at 8% 0%, #e3ecdf 0, transparent 42%),
        radial-gradient(circle at 100% 10%, #e8e2d6 0, transparent 38%),
        var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: 0.9em; }

.shell { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.side {
    background: linear-gradient(180deg, #243228 0%, var(--side) 100%);
    color: var(--side-ink);
    padding: 28px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 0;
    height: 100vh;
}
.brand {
    font-weight: 700;
    letter-spacing: 0.04em;
    font-size: 1.05rem;
    padding: 0 10px;
}
.side nav { display: flex; flex-direction: column; gap: 4px; }
.side nav a {
    color: var(--side-ink);
    padding: 11px 12px;
    border-radius: 10px;
    text-decoration: none;
    opacity: 0.82;
}
.side nav a.active, .side nav a:hover {
    background: rgba(255,255,255,0.09);
    opacity: 1;
    text-decoration: none;
}
.logout { margin-top: auto; padding: 0 4px; }
.logout button {
    width: 100%;
    background: transparent;
    color: var(--side-ink);
    border: 1px solid rgba(255,255,255,0.18);
}

button, .btn, .btn-light {
    appearance: none;
    border: 0;
    border-radius: 9px;
    padding: 10px 14px;
    background: var(--accent);
    color: var(--accent-ink);
    font: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    line-height: 1.2;
}
.btn-light, .main button.btn-light, .editor-toolbar button {
    background: var(--soft);
    color: var(--ink);
    border: 1px solid var(--line);
}
button:hover, .btn:hover { filter: brightness(1.05); }
button:disabled { opacity: 0.55; cursor: not-allowed; }

.main { padding: 28px 34px 56px; min-width: 0; }
.page-head { margin-bottom: 4px; }
.page-head h1 { margin: 0 0 6px; font-size: 1.7rem; letter-spacing: -0.02em; }
.muted { color: var(--muted); margin: 0; }

.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 22px;
    margin-top: 18px;
    box-shadow: 0 10px 30px rgba(28, 40, 28, 0.03);
}
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.panel h2, .section-title {
    margin: 0 0 14px;
    font-size: 1.05rem;
}
.section-title {
    grid-column: 1 / -1;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line);
    margin-top: 8px;
}
.section-title:first-child { margin-top: 0; }

.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.stat {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px;
}
.stat-label { color: var(--muted); font-size: 0.9rem; }
.stat-value { font-size: 2rem; font-weight: 700; margin-top: 6px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 11px 8px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 0.94rem; }
th { color: var(--muted); font-weight: 600; }
.ellipsis { max-width: 360px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tag {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 999px;
    background: #eef2ea;
    border: 1px solid var(--line);
    font-size: 0.78rem;
}
.tag.ok { background: #dff0e2; color: var(--ok); }

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 18px;
    align-items: start;
}
.form-grid > label,
.field {
    display: flex;
    flex-direction: column;
    gap: 7px;
    font-size: 0.92rem;
    min-width: 0;
}
.form-grid .span-2,
.field.span-2 { grid-column: 1 / -1; }

.field-check,
.form-grid .check {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    min-height: 42px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--soft);
}
.field-check input[type="checkbox"],
.form-grid .check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin: 0;
    flex: 0 0 auto;
}

.form-footer {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-top: 4px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}
.form-footer .left,
.form-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

input, select, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 11px 12px;
    font: inherit;
    background: #fff;
}
input:focus, select:focus, textarea:focus {
    outline: 2px solid rgba(47, 93, 58, 0.22);
    border-color: #7aa384;
}
textarea { resize: vertical; line-height: 1.55; font-family: var(--mono); font-size: 0.92rem; }

.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.actions form { display: inline; }

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 14px;
}
.alert.ok { background: #e5f4e8; color: var(--ok); }
.alert.err { background: #f8e6e6; color: var(--danger); }
.err-text { color: var(--danger); }

.meta { display: grid; gap: 12px; margin: 0; }
.meta div { display: grid; grid-template-columns: 100px 1fr; gap: 10px; }
.meta dt { color: var(--muted); margin: 0; }
.meta dd { margin: 0; }
pre.md {
    white-space: pre-wrap;
    word-break: break-word;
    background: var(--soft);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 14px;
    max-height: 70vh;
    overflow: auto;
    font-size: 0.9rem;
}

.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
}
.login-card {
    width: min(400px, 92vw);
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 18px 40px rgba(28, 40, 28, 0.06);
}
.login-card h1 { margin: 0 0 4px; font-size: 1.4rem; }
.login-card form { display: grid; gap: 12px; margin-top: 18px; }
.login-card label { display: grid; gap: 6px; }

/* Setup guide on settings page */
.guide-panel .setup-steps {
    margin: 8px 0 0;
    padding: 0;
    list-style: none;
    counter-reset: none;
    display: grid;
    gap: 12px;
}
.guide-panel .setup-steps > li {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--soft);
    padding: 14px 16px;
}
.guide-panel .step-title {
    font-weight: 700;
    margin-bottom: 8px;
}
.guide-panel .step-body p,
.guide-panel .step-body ul,
.guide-panel .step-body ol {
    margin: 0 0 8px;
}
.guide-panel .step-body ul,
.guide-panel .inner-steps {
    padding-left: 1.2em;
}
.guide-panel .step-body li { margin: 4px 0; }
.guide-panel .guide-checklist {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px dashed #9bb39e;
    background: #f3f8f3;
}
.guide-panel .check-list {
    margin: 8px 0 0;
    padding-left: 1.2em;
}
.guide-panel .check-list li { margin: 6px 0; }
.guide-intro {
    padding: 4px 0;
}
.guide-intro ul { margin: 8px 0 0; padding-left: 1.2em; }
.guide-code {
    margin: 10px 0 0;
    padding: 12px 14px;
    border-radius: 10px;
    background: #1f2a22;
    color: #e8efe8;
    font-size: 0.88rem;
    white-space: pre-wrap;
    overflow: auto;
}
.guide-panel table { margin-top: 8px; }
.guide-panel h2.section-title { font-size: 1.2rem; }

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}
.status-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: var(--soft);
}
.status-item.is-ok { background: #eef8f0; border-color: #b9d4bf; }
.status-item.is-miss { background: #fbf4ef; border-color: #e2c9b4; }
.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-top: 5px;
    flex: 0 0 auto;
    background: #c29b6a;
}
.status-item.is-ok .status-dot { background: var(--ok); }
.status-name { font-weight: 700; }
.status-desc { color: var(--muted); font-size: 0.86rem; margin-top: 2px; word-break: break-all; }
.test-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.test-result {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: #f7f4ee;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.86rem;
    min-height: 72px;
}
.test-result.is-ok { background: #e8f6eb; border-color: #b9d4bf; }
.test-result.is-err { background: #f8e6e6; border-color: #e0b4b4; }

@media (max-width: 900px) {
    .status-grid { grid-template-columns: 1fr; }
}

/* Writer */
.writer-meta {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}
.writer-shell {
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    background: #fff;
}
.editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px;
    border-bottom: 1px solid var(--line);
    background: var(--soft);
}
.editor-toolbar .group {
    display: inline-flex;
    gap: 4px;
    padding-right: 8px;
    margin-right: 4px;
    border-right: 1px solid var(--line);
}
.editor-toolbar .group:last-child {
    border-right: 0;
    margin-right: 0;
    padding-right: 0;
}
.editor-toolbar button {
    min-width: 36px;
    height: 34px;
    padding: 0 10px;
    font-size: 0.86rem;
    border-radius: 8px;
}
.editor-toolbar button strong { font-weight: 700; }
.editor-toolbar .hint {
    margin-left: auto;
    color: var(--muted);
    font-size: 0.8rem;
    align-self: center;
    padding-right: 4px;
}
.writer-panes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 520px;
}
.writer-pane {
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.writer-pane + .writer-pane { border-left: 1px solid var(--line); }
.writer-pane-label {
    padding: 8px 12px;
    font-size: 0.78rem;
    color: var(--muted);
    background: #fafaf7;
    border-bottom: 1px solid var(--line);
}
#markdown_body {
    flex: 1;
    min-height: 480px;
    border: 0;
    border-radius: 0;
    resize: none;
    padding: 16px;
    outline: none;
}
#markdown_body:focus { outline: none; box-shadow: none; border-color: transparent; }
.writer-preview {
    flex: 1;
    overflow: auto;
    padding: 18px 20px;
    line-height: 1.7;
    background: #fff;
}
.writer-preview > :first-child { margin-top: 0; }
.writer-preview h1, .writer-preview h2, .writer-preview h3 { margin: 1.1em 0 0.45em; line-height: 1.25; }
.writer-preview p { margin: 0.75em 0; }
.writer-preview img { max-width: 100%; border-radius: 8px; }
.writer-preview code {
    background: #eef3ea;
    padding: 0.1em 0.35em;
    border-radius: 4px;
}
.writer-preview pre {
    background: #1f2a22;
    color: #e8efe8;
    padding: 12px 14px;
    border-radius: 10px;
    overflow: auto;
}
.writer-preview pre code { background: transparent; color: inherit; padding: 0; }
.writer-preview blockquote {
    margin: 0.8em 0;
    padding: 0.2em 0 0.2em 1em;
    border-left: 3px solid #8aa990;
    color: var(--muted);
}
.writer-preview .katex-display { margin: 1em 0; overflow-x: auto; }
.writer-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
}
.writer-tip {
    color: var(--muted);
    font-size: 0.85rem;
}
.upload-status {
    font-size: 0.85rem;
    color: var(--muted);
    min-height: 1.2em;
}

@media (max-width: 1100px) {
    .writer-panes { grid-template-columns: 1fr; }
    .writer-pane + .writer-pane { border-left: 0; border-top: 1px solid var(--line); }
    .writer-meta { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
    .shell { grid-template-columns: 1fr; }
    .side {
        position: static;
        height: auto;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }
    .side nav { flex-direction: row; flex-wrap: wrap; }
    .logout { margin-top: 0; margin-left: auto; width: auto; }
    .logout button { width: auto; }
    .stats { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .form-grid .span-2, .field.span-2, .section-title, .form-footer { grid-column: auto; }
    .form-footer { flex-direction: column; align-items: stretch; }
    .main { padding: 18px; }
    .editor-toolbar .hint { display: none; }
}