:root {
    --ink: #1c2541;
    --ink-soft: #3a4160;
    --bg: #f7f6f2;
    --card-bg: #ffffff;
    --border: #e3e1da;
    --accent: #1c2541;
    --accent-hover: #10182e;
    --star: #d4a017;
    --danger: #b3432b;
    --danger-hover: #94341f;
    --muted: #767a8a;
    --radius: 10px;
    font-size: 16px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.5;
}

a { color: inherit; }

/* ---------- Header ---------- */
.site-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}

.site-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.brand-name {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.brand-sub {
    font-size: 0.82rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* ---------- Buttons ---------- */
.btn {
    font: inherit;
    font-weight: 600;
    font-size: 0.92rem;
    padding: 10px 18px;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: default; }

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--ink);
}
.btn-outline:hover { border-color: var(--accent); }

.btn-ghost {
    background: transparent;
    color: var(--ink-soft);
    border-color: transparent;
}
.btn-ghost:hover { background: #eeece5; }

.btn-text {
    background: transparent;
    border-color: transparent;
    color: var(--muted);
    padding: 10px 8px;
}
.btn-text:hover { color: var(--ink); }

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

.btn-block { width: 100%; }

.btn-copy.copied {
    background: #2f7d4f;
}

/* ---------- Page layout ---------- */
.page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}

.intro h1 {
    margin: 0 0 4px;
    font-size: 1.8rem;
    letter-spacing: -0.01em;
}

.intro p {
    margin: 0 0 28px;
    color: var(--muted);
}

/* ---------- Add block panel ---------- */
.add-block-panel {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 32px;
}

.add-block-panel h2 {
    margin: 0 0 16px;
    font-size: 1.15rem;
}

.add-block-panel label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink-soft);
    margin: 14px 0 6px;
}

.add-block-panel label:first-of-type { margin-top: 0; }

.optional {
    font-weight: 400;
    color: var(--muted);
}

.add-block-panel input[type="text"],
.add-block-panel textarea,
.add-block-panel select,
.login-form input {
    width: 100%;
    font: inherit;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fdfdfc;
    color: var(--ink);
}

.add-block-panel textarea {
    resize: vertical;
    min-height: 160px;
    line-height: 1.5;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.92rem;
}

.add-block-panel input:focus,
.add-block-panel textarea:focus,
.add-block-panel select:focus,
.login-form input:focus {
    outline: none;
    border-color: var(--accent);
}

.form-actions {
    margin-top: 18px;
    display: flex;
    gap: 10px;
    align-items: center;
}

/* ---------- Library controls ---------- */
.library-controls {
    margin-bottom: 20px;
}

#search-input {
    width: 100%;
    font: inherit;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    margin-bottom: 14px;
}
#search-input:focus { outline: none; border-color: var(--accent); }

.filter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.filter-toggle {
    display: inline-flex;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.filter-btn {
    font: inherit;
    font-weight: 600;
    font-size: 0.88rem;
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}

.filter-btn.active {
    background: var(--accent);
    color: #fff;
}

.sort-label {
    font-size: 0.85rem;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sort-label select {
    font: inherit;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--ink);
}

/* ---------- Blocks grid ---------- */
.blocks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 18px;
}

.block-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    display: flex;
    flex-direction: column;
}

.block-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

.block-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    word-break: break-word;
}

.favourite-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
    color: var(--border);
    padding: 0;
    flex-shrink: 0;
}
.favourite-btn.is-favourite { color: var(--star); }

.category-badge {
    align-self: flex-start;
    margin-top: 8px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--ink-soft);
    background: #eef0e8;
    padding: 3px 9px;
    border-radius: 100px;
}

.block-snippet {
    margin: 12px 0 0;
    color: var(--ink-soft);
    font-size: 0.92rem;
    white-space: pre-wrap;
    flex-grow: 1;
}

.block-meta {
    margin-top: 14px;
    font-size: 0.76rem;
    color: var(--muted);
}

.block-actions {
    margin-top: 14px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.block-actions .btn { padding: 8px 14px; font-size: 0.85rem; }

.empty-state {
    text-align: center;
    color: var(--muted);
    padding: 40px 0;
}

/* ---------- Alerts ---------- */
.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 16px;
}
.alert-error {
    background: #fbe9e5;
    color: var(--danger);
    border: 1px solid #f3cec5;
}

/* ---------- Login page ---------- */
.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 24px;
}

.login-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 32px;
    width: 100%;
    max-width: 360px;
}

.login-title {
    margin: 0;
    font-size: 1.5rem;
    text-align: center;
}

.login-subtitle {
    margin: 2px 0 24px;
    text-align: center;
    color: var(--muted);
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.06em;
}

.login-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink-soft);
    margin: 14px 0 6px;
}
.login-form label:first-of-type { margin-top: 0; }

.login-form .btn { margin-top: 22px; }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .site-header-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
    .header-actions { width: 100%; }
    .header-actions .btn { flex: 1; }
    .filter-row { flex-direction: column; align-items: stretch; }
    .blocks-grid { grid-template-columns: 1fr; }
}