/* =============================================================
   Custom component classes
   All colors use CSS variables defined in config/theme.css.
   Tailwind utility classes handle layout, spacing, and sizing.
   ============================================================= */


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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.125rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: background-color 0.15s;
    background-color: var(--accent);
    color: var(--accent-text);
    white-space: nowrap;
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-hover);
}
.btn-primary:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.125rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s;
    background-color: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    white-space: nowrap;
}
.btn-secondary:hover {
    background-color: var(--border);
}


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

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
}


/* ── Form elements ───────────────────────────────────────── */

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.375rem;
}

.form-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    background-color: var(--bg-card);
    color: var(--text);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.form-textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    background-color: var(--bg-card);
    color: var(--text);
    font-size: 0.875rem;
    outline: none;
    resize: vertical;
    min-height: 6rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    font-family: inherit;
}
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}


/* ── Tabs ────────────────────────────────────────────────── */

.tab-bar {
    display: inline-flex;
    gap: 0.25rem;
    background-color: var(--border);
    padding: 0.25rem;
    border-radius: 0.625rem;
}

.tab-btn {
    padding: 0.4375rem 1.125rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: background-color 0.15s, color 0.15s;
    background: transparent;
    color: var(--text-muted);
}
.tab-btn:hover:not(.active) {
    color: var(--text);
    background-color: color-mix(in srgb, var(--bg-card) 60%, transparent);
}
.tab-btn.active {
    background-color: var(--bg-card);
    color: var(--text);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}


/* ── Sidebar ─────────────────────────────────────────────── */

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.4375rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: background-color 0.15s, opacity 0.15s;
    color: var(--sidebar-text);
    opacity: 0.6;
    text-decoration: none;
}
.sidebar-link:hover {
    opacity: 1;
    background-color: var(--sidebar-hover);
}
.sidebar-link.active {
    opacity: 1;
    background-color: var(--sidebar-active);
    color: var(--accent-text);
}

.sidebar-category {
    padding: 1.125rem 0.75rem 0.375rem;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--sidebar-text);
    opacity: 0.35;
}


/* ── Drop zone ───────────────────────────────────────────── */

.drop-zone {
    border: 2px dashed var(--border);
    border-radius: 0.75rem;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s, color 0.15s;
    color: var(--text-muted);
}
.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background-color: color-mix(in srgb, var(--accent) 5%, transparent);
    color: var(--text);
}


/* ── File list (merge) ───────────────────────────────────── */

.file-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    color: var(--text);
    user-select: none;
    transition: box-shadow 0.15s, opacity 0.15s;
}
.file-item .drag-handle {
    cursor: grab;
    color: var(--text-muted);
    flex-shrink: 0;
}
.file-item .drag-handle:active {
    cursor: grabbing;
}
.file-item.dragging {
    opacity: 0.35;
}
.file-item.drop-target {
    box-shadow: 0 -3px 0 var(--accent);
}


/* ── Radio options ───────────────────────────────────────── */

.radio-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s;
    background-color: var(--bg-card);
}
.radio-option:has(input:checked) {
    border-color: var(--accent);
    background-color: color-mix(in srgb, var(--accent) 5%, transparent);
}
.radio-option input[type="radio"] {
    accent-color: var(--accent);
    margin-top: 0.1875rem;
    flex-shrink: 0;
    width: 1rem;
    height: 1rem;
}
.radio-option-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
}
.radio-option-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}


/* ── App cards (homepage) ────────────────────────────────── */

.app-card {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    padding: 1.375rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    text-decoration: none;
    color: var(--text);
    transition: border-color 0.15s, box-shadow 0.2s, transform 0.15s;
}
.app-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px color-mix(in srgb, var(--accent) 12%, transparent);
    transform: translateY(-2px);
}
.app-card-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.625rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    margin-bottom: 0.25rem;
}
.app-card-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--heading);
}
.app-card-desc {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.55;
    flex: 1;
}
.app-card-cta {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent);
    margin-top: 0.25rem;
}


/* ── Page header ─────────────────────────────────────────── */

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--heading);
}
.page-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}


/* ── Alerts ──────────────────────────────────────────────── */

.alert {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    line-height: 1.5;
}
.alert-success {
    background-color: #f0fdf4;
    border: 1px solid #86efac;
    color: #166534;
}
.alert-error {
    background-color: #fef2f2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}
.alert-warning {
    background-color: #fffbeb;
    border: 1px solid #fcd34d;
    color: #92400e;
}


/* ── Scrollbar (WebKit) ──────────────────────────────────── */

::-webkit-scrollbar        { width: 5px; height: 5px; }
::-webkit-scrollbar-track  { background: transparent; }
::-webkit-scrollbar-thumb  { background-color: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background-color: var(--text-muted); }