:root {
    --bg: #0e1015;
    --surface: #1a1d23;
    --surface-2: #2a2d33;
    --border: #2a2d33;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #b91c1c;
    --warn: #b45309;
    --ok: #15803d;
    --tag: #5b21b6;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

input, select, textarea, button {
    font: inherit;
    color: inherit;
}

/* ---- Header ---- */
header.top {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}
.top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}
.top-row h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}
.logout-form { margin: 0; }
.ghost {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    padding: 0.35rem 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
}
.ghost:hover { color: var(--text); border-color: var(--text); }

.status-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.status-tabs a {
    padding: 0.4rem 0.85rem;
    border-radius: 999px;
    background: var(--surface-2);
    color: var(--text);
    font-size: 0.875rem;
    white-space: nowrap;
}
.status-tabs a:hover { text-decoration: none; background: #3a3d43; }
.status-tabs a.active { background: var(--accent); color: white; }

.filters { margin-bottom: 0.5rem; }
.filters select {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
}

.tag-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
}
.tag-chip {
    background: var(--surface-2);
    color: var(--text);
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.8rem;
}
.tag-chip:hover { text-decoration: none; background: #3a3d43; }
.tag-chip.active { background: var(--tag); color: white; }
.tag-chip .count {
    opacity: 0.6;
    margin-left: 0.25rem;
    font-size: 0.7rem;
}
.tag-clear {
    color: var(--muted);
    font-size: 0.8rem;
    margin-left: 0.5rem;
}

/* ---- Main ---- */
main {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.empty {
    text-align: center;
    color: var(--muted);
    padding: 3rem 1rem;
}

/* ---- Items ---- */
.items {
    list-style: none;
    padding: 0;
    margin: 0;
}
.item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.85rem 1rem;
    margin-bottom: 0.5rem;
    transition: border-color 0.15s, transform 0.05s;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}
.item:hover { border-color: var(--accent); }
.item.status-done { opacity: 0.5; }
.item.status-done .item-title { text-decoration: line-through; }
.item.prio-high { border-left: 3px solid var(--danger); }
.item.prio-low { opacity: 0.85; }
.item.overdue {
    border: 2px solid var(--danger);
    box-shadow: 0 0 0 1px rgba(185, 28, 28, 0.25);
}

.quick-toggle {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.15rem;
    flex-shrink: 0;
    cursor: pointer;
    accent-color: var(--accent);
}

.item-content {
    flex: 1;
    cursor: pointer;
    min-width: 0;
}
.item-content:active { transform: scale(0.998); }

.item-title {
    font-weight: 500;
    margin-bottom: 0.5rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}
.item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}
.chip {
    background: var(--surface-2);
    color: var(--text);
    padding: 0.15rem 0.55rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    white-space: nowrap;
}
.chip.project { background: #1e40af; }
.chip.priority.high { background: var(--danger); }
.chip.priority.low { background: #4b5563; color: var(--muted); }
.chip.priority.normal { background: var(--surface-2); }
.chip.due { background: var(--warn); }
.chip.due.today { background: var(--accent); color: white; }
.chip.due.overdue { background: var(--danger); color: white; font-weight: 500; }
.chip.tag { background: var(--tag); }
.chip.status { background: var(--surface-2); color: var(--muted); text-transform: capitalize; }

/* ---- Login ---- */
.login {
    max-width: 360px;
    margin: 4rem auto;
    padding: 2rem 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    text-align: center;
}
.login h1 { margin: 0 0 1.5rem; }
.login label {
    display: block;
    text-align: left;
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 0.5rem;
}
.login input {
    width: 100%;
    padding: 0.875rem;
    font-size: 1.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    color: var(--text);
    text-align: center;
    letter-spacing: 0.5rem;
    margin-bottom: 1rem;
}
.login input:focus {
    outline: none;
    border-color: var(--accent);
}
.login button {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    font-weight: 500;
    background: var(--accent);
    border: none;
    border-radius: 0.375rem;
    color: white;
    cursor: pointer;
}
.login button:hover { background: var(--accent-hover); }
.error {
    color: #f87171;
    margin-top: 0.75rem;
    font-size: 0.875rem;
}

/* ---- Floating action button ---- */
.fab {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    border: none;
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    z-index: 50;
    transition: background 0.15s, transform 0.05s;
}
.fab:hover { background: var(--accent-hover); }
.fab:active { transform: scale(0.95); }

/* ---- Modal ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: flex-start;
    justify-content: center;
    z-index: 1000;
    padding: 2rem 1rem;
    overflow-y: auto;
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    max-width: 500px;
    width: 100%;
    margin: auto 0;
}
.modal h2 {
    margin: 0 0 1rem;
    font-size: 1.25rem;
}

/* ---- Form elements (in modal) ---- */
.modal form label {
    display: block;
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 0.75rem;
}
.modal form input[type="text"],
.modal form input:not([type]),
.modal form input[type="date"],
.modal form input[type="password"],
.modal form select,
.modal form textarea {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    padding: 0.55rem 0.7rem;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    font-size: 1rem;
}
.modal form textarea {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9rem;
    resize: vertical;
}
.modal form input:focus,
.modal form select:focus,
.modal form textarea:focus {
    outline: none;
    border-color: var(--accent);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}
.modal-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.25rem;
    justify-content: flex-end;
    flex-wrap: wrap;
}
.modal-actions button {
    padding: 0.55rem 1rem;
    border-radius: 0.375rem;
    border: 1px solid var(--border);
    cursor: pointer;
    font-size: 0.9rem;
}
.modal-actions .ghost {
    background: transparent;
    color: var(--muted);
}
.modal-actions .ghost:hover { color: var(--text); }
.modal-actions .primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    font-weight: 500;
}
.modal-actions .primary:hover { background: var(--accent-hover); }
.modal-actions .danger {
    background: transparent;
    border-color: var(--danger);
    color: var(--danger);
    margin-right: auto;
}
.modal-actions .danger:hover {
    background: var(--danger);
    color: white;
}

/* ---- Responsive ---- */
@media (min-width: 600px) {
    header.top { padding: 1rem 1.5rem; }
    .top-row h1 { font-size: 1.5rem; }
}