:root {
    --bg: #0f1115;
    --surface: #181b21;
    --surface-2: #21262d;
    --text: #e6edf3;
    --muted: #8b949e;
    --primary: #58a6ff;
    --primary-hover: #79b8ff;
    --danger: #f85149;
    --success: #3fb950;
    --warn: #d29922;
    --border: #30363d;
    --radius: 8px;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
button, .btn {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 14px;
    cursor: pointer;
    font-size: 14px;
}
button.primary, .btn.primary { background: var(--primary); color: #000; border-color: var(--primary); }
button.primary:hover, .btn.primary:hover { background: var(--primary-hover); }
button.danger { color: var(--danger); border-color: var(--danger); }
input, textarea, select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 10px;
    font-size: 14px;
    width: 100%;
}
textarea { min-height: 100px; resize: vertical; }
.login-box {
    max-width: 360px; margin: 15vh auto; padding: 32px;
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px; text-align: center;
}
.login-box h1 { margin: 0 0 8px; }
.login-box p { color: var(--muted); margin-bottom: 24px; }
.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 10;
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar .user { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
.filters {
    display: flex; gap: 10px; padding: 16px 20px; flex-wrap: wrap; align-items: center;
}
.filters input { max-width: 220px; }
.filters select { max-width: 160px; }
.board {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 0 20px 20px;
}
@media (max-width: 1100px) {
    .board { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .board { grid-template-columns: 1fr; }
}
.column { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; min-height: 200px; padding: 12px; }
.column h3 { margin: 0 0 12px; font-size: 14px; text-transform: uppercase; color: var(--muted); }
.column.todo h3 { color: var(--primary); }
.column.doing h3 { color: var(--warn); }
.column.blocked h3 { color: var(--danger); }
.column.done h3 { color: var(--success); }
.card {
    background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 12px; margin-bottom: 10px; cursor: pointer; transition: border-color .15s;
}
.card:hover { border-color: var(--primary); }
.card .title { font-weight: 600; margin-bottom: 6px; }
.card .meta { font-size: 12px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.card .meta span { background: var(--bg); padding: 2px 6px; border-radius: 4px; }
.priority-urgent { border-left: 4px solid var(--danger); }
.priority-high { border-left: 4px solid var(--warn); }
.priority-med { border-left: 4px solid var(--primary); }
.priority-low { border-left: 4px solid var(--muted); }
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.6);
    display: flex; align-items: center; justify-content: center; z-index: 20; padding: 20px;
}
.modal {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    width: 100%; max-width: 680px; max-height: 90vh; overflow-y: auto; padding: 20px;
}
.modal h2 { margin-top: 0; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid.full { grid-template-columns: 1fr; }
.actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab { padding: 6px 12px; border-radius: var(--radius); cursor: pointer; color: var(--muted); }
.tab.active { background: var(--surface-2); color: var(--text); }
.section { padding: 16px 20px; }
.token-row { display: flex; align-items: center; justify-content: space-between; padding: 10px; background: var(--surface-2); border-radius: var(--radius); margin-bottom: 8px; }
.hidden { display: none; }
.empty { color: var(--muted); text-align: center; padding: 24px; }