/* ==========================================================================
   Components — the things you click. Each rule owns one class.
   ========================================================================== */

/* --- File rail entry -------------------------------------------------------
   An active file is marked by a rule at the left edge, the way an editor marks
   the current line — not by a filled pill.
   -------------------------------------------------------------------------- */

.file-selector {
    position: relative;
    display: block;
    padding: var(--dn-space-1) var(--dn-space-2) var(--dn-space-1) var(--dn-space-3);
    border-radius: var(--dn-radius-sm);
    color: var(--dn-fg-muted);
    font-family: var(--dn-font-code);
    font-size: var(--dn-text-sm);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--dn-dur-fast) var(--dn-ease),
                background-color var(--dn-dur-fast) var(--dn-ease);
}

.file-selector::before {
    content: "";
    position: absolute;
    inset-block: 3px;
    left: 0;
    width: 2px;
    border-radius: 999px;
    background: var(--dn-accent);
    transform: scaleY(0);
    transition: transform var(--dn-dur) var(--dn-ease);
}

.file-selector:hover {
    background: var(--dn-bg-raised);
    color: var(--dn-fg);
}

.file-selector.active {
    color: var(--dn-fg);
    background: var(--dn-bg-raised);
}

.file-selector.active::before {
    transform: scaleY(1);
}

/* --- Buttons ---------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--dn-space-2);
    padding: var(--dn-space-2) var(--dn-space-4);
    border: 1px solid var(--dn-border-strong);
    border-radius: var(--dn-radius);
    background: var(--dn-bg-raised);
    color: var(--dn-fg);
    font-size: var(--dn-text-base);
    font-weight: 500;
    transition: background-color var(--dn-dur-fast) var(--dn-ease),
                border-color var(--dn-dur-fast) var(--dn-ease);
}

.btn:hover:not(:disabled) {
    background: var(--dn-bg-overlay);
    border-color: var(--ctp-surface-2);
}

.btn-primary {
    background: var(--dn-accent);
    border-color: var(--dn-accent);
    color: var(--dn-fg-on-accent);
}

.btn-primary:hover:not(:disabled) {
    background: var(--dn-accent-hover);
    border-color: var(--dn-accent-hover);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--dn-bg-raised);
    border-color: transparent;
}

/* --- Text input --------------------------------------------------------------
   Workspace names, file names, search.
   -------------------------------------------------------------------------- */

.input {
    width: 100%;
    padding: var(--dn-space-2) var(--dn-space-3);
    border: 1px solid var(--dn-border-strong);
    border-radius: var(--dn-radius);
    background: var(--dn-bg-well);
    color: var(--dn-fg);
    font-family: var(--dn-font-code);
    font-size: var(--dn-text-base);
    transition: border-color var(--dn-dur-fast) var(--dn-ease);
}

.input:focus {
    border-color: var(--dn-accent);
    outline: none;
}

.input:focus-visible {
    outline: 2px solid var(--dn-accent-muted);
    outline-offset: 0;
}

/* --- Field ------------------------------------------------------------------- */

.field {
    display: flex;
    flex-direction: column;
    gap: var(--dn-space-2);
}

.field-label {
    color: var(--dn-fg-muted);
    font-family: var(--dn-font-code);
    font-size: var(--dn-text-xs);
    letter-spacing: var(--dn-tracking-caps);
    text-transform: uppercase;
}

.field-hint {
    color: var(--dn-fg-faint);
    font-size: var(--dn-text-xs);
}

.field-error {
    color: var(--dn-danger);
    font-size: var(--dn-text-xs);
}

/* --- Empty state --------------------------------------------------------------
   An empty screen is an invitation to act, not a shrug.
   -------------------------------------------------------------------------- */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--dn-space-3);
    height: 100%;
    padding: var(--dn-space-7) var(--dn-space-4);
    color: var(--dn-fg-muted);
    text-align: center;
}

.empty-state-title {
    color: var(--dn-fg);
    font-size: var(--dn-text-md);
    font-weight: 600;
}

/* --- Utilities ---------------------------------------------------------------- */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}