.btn {
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-2xl);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    gap: var(--space-2);
    transition: all 0.2s ease;
}

.btn i {
    font-size: 15px;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: var(--color-danger-text);
    box-shadow: 0 4px 15px var(--color-accent-shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-accent-shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px var(--color-accent-shadow);
}

.btn-secondary {
    background-color: var(--color-bg-hover);
    color: var(--color-text-secondary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-input-alt);
    border-color: var(--color-border-medium);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow-sm);
}

.btn-secondary:active {
    transform: translateY(0);
    background-color: var(--color-border);
}

.btn-danger {
    background: var(--color-danger-gradient);
    color: var(--color-danger-text);
    box-shadow: 0 4px 15px var(--color-danger-ring);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-danger-ring-lg);
}

.btn-danger:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px var(--color-danger-ring);
}

/* ── State matrix: focus / disabled / loading ───────────────── */

/* Keyboard focus ring (explicit so the gradient variants get a crisp ring;
   mirrors the global a11y baseline). */
.btn:focus-visible {
    outline: 2px solid var(--color-focus-ring);
    outline-offset: 2px;
}

/* Disabled — dimmed, no hover lift, non-interactive. */
.btn:disabled,
.btn[disabled],
.btn.is-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    filter: none;
    pointer-events: none;
}

/* Loading — hide the label, show an inline spinner, block interaction.
   Toggle with the `.is-loading` class or `aria-busy="true"`. */
.btn.is-loading,
.btn[aria-busy="true"] {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.is-loading::after,
.btn[aria-busy="true"]::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid var(--color-on-accent);
    border-top-color: transparent;
    border-radius: var(--radius-full);
    animation: spin var(--spin-duration) linear infinite;
}

/* The secondary button's text isn't white — tint its spinner to the text. */
.btn-secondary.is-loading::after,
.btn-secondary[aria-busy="true"]::after {
    border-color: var(--color-text-secondary);
    border-top-color: transparent;
}

/* View Toggle Buttons */
.view-toggle {
    display: flex;
    gap: var(--space-0-5);
    padding: 3px;
    background-color: var(--color-bg-muted);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 32px;
    background-color: transparent;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    color: var(--color-text-faint);
    font-size: var(--text-base);
    transition: all 0.2s ease;
}

.toggle-btn:hover {
    background-color: var(--color-border);
    color: var(--color-text-subtle);
}

.toggle-btn.active {
    background-color: var(--color-border);
    color: var(--color-accent);
    box-shadow: 0 1px 3px var(--color-shadow);
}

.toggle-btn i {
    pointer-events: none;
}

/* ── Group-by selector (inside .view-toggle) ────────────── */

.view-toggle-separator {
    width: 1px;
    height: 20px;
    background: var(--color-border-medium);
    align-self: center;
    margin: 0 var(--space-0-5);
}

.view-toggle-separator.hidden {
    display: none;
}

.group-by-selector {
    display: flex;
    align-items: center;
    position: relative;
}

.group-by-selector.hidden {
    display: none;
}

.group-by-btn.active {
    color: var(--color-accent);
}

/* Sort direction button — rotate the SVG icon when order is reversed */
.sort-dir-btn .oxi-icon {
    transition: transform 0.2s ease;
}

.sort-dir-btn.active .oxi-icon {
    transform: rotate(180deg);
}

/* Active label shown inline next to the icon */
.group-by-label {
    display: none;
    font-size: 0.78rem;
    font-weight: var(--weight-semibold);
    white-space: nowrap;
}

/* When a group-by is selected the label has text — expand the button to fit */
.group-by-btn:has(.group-by-label:not(:empty)) {
    width: auto;
    padding: 0 var(--space-2);
    gap: 5px;
}

.group-by-btn:has(.group-by-label:not(:empty)) .group-by-label {
    display: inline;
}

.group-by-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    z-index: 200;
    min-width: 140px;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 16px var(--color-shadow);
    padding: var(--space-1);
    display: flex;
    flex-direction: column;
    gap: var(--space-0-5);
}

.group-by-menu.hidden {
    display: none;
}

.group-by-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1-5) var(--space-2-5);
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--color-text);
    text-align: left;
    width: 100%;
}

.group-by-option:hover {
    background: var(--color-border);
}

.group-by-option.active {
    color: var(--color-accent);
    font-weight: var(--weight-semibold);
}