/* ==========================================================================
   Overlays: slide-over, dropdown, popover, dialog, toast
   spec: docs/features/62-ui-ux-design-system.md §4.4
   ========================================================================== */

/* --------------------------------------------------------------------------
   Slide-over — the default create/edit surface (§6 rule 1)
   -------------------------------------------------------------------------- */

.slideover__scrim {
    position: fixed;
    inset: 0;
    background: rgba(16, 24, 40, .20);
    z-index: 50;
    animation: fade-in var(--motion-base) both;
}

.slideover {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    bottom: var(--space-6);
    width: var(--slideover-width);
    max-width: calc(100vw - var(--space-8));
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-panel), var(--shadow-lg);
    z-index: 51;
    animation: slide-in var(--motion-panel) both;
    overflow: hidden;
}

.slideover--wide { width: var(--slideover-width-wide); }

.slideover__header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.slideover__title {
    flex: 1;
    min-width: 0;
    font-size: var(--t-panel-title-size);
    font-weight: var(--t-panel-title-weight);
    line-height: var(--t-panel-title-lh);
}

.slideover__body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.slideover__footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

/* Two fields side by side (Start Date / End Date) */
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

@keyframes slide-in {
    from { opacity: 0; transform: translateX(16px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
    .slideover { animation: fade-in var(--motion-base) both; }
}

/* Full-screen sheet on small viewports (§7.5) */
@media (max-width: 767px) {
    .slideover {
        top: 0; right: 0; bottom: 0; left: 0;
        width: auto;
        max-width: none;
        border-radius: 0;
    }
}

/* --------------------------------------------------------------------------
   Dropdown
   -------------------------------------------------------------------------- */

.dropdown { position: relative; display: inline-flex; }

.dropdown__menu {
    position: absolute;
    top: calc(100% + var(--space-1));
    left: 0;
    min-width: 200px;
    padding: var(--space-1);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 60;
    animation: fade-in var(--motion-fast) both;
    max-height: 320px;
    overflow-y: auto;
}
.dropdown__menu--right { left: auto; right: 0; }
.dropdown__menu--full { left: 0; right: 0; min-width: 0; }

.dropdown__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    height: var(--control-height-md);
    padding: 0 var(--space-3);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--t-body-size);
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: background-color var(--motion-fast);
}
.dropdown__item:hover { background: var(--bg-subtle); }
.dropdown__item.is-selected { background: var(--bg-muted); font-weight: 500; }
.dropdown__item:disabled { opacity: .5; cursor: not-allowed; }
.dropdown__item--danger { color: var(--tag-danger-fg); }
.dropdown__item--danger:hover { background: var(--tag-danger-bg); }

.dropdown__divider {
    height: 1px;
    margin: var(--space-1) 0;
    background: var(--border);
}

.dropdown__search { padding: var(--space-2); border-bottom: 1px solid var(--border); }

/* Two-pane filter dropdown (date shortcuts + calendar) */
.dropdown__panes { display: flex; }
.dropdown__pane-left {
    width: 140px;
    padding: var(--space-1);
    border-right: 1px solid var(--border);
}
.dropdown__pane-right { padding: var(--space-2); }

/* --------------------------------------------------------------------------
   Popover / date picker
   -------------------------------------------------------------------------- */

.popover {
    position: absolute;
    z-index: 60;
    padding: var(--space-3);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: fade-in var(--motion-fast) both;
}

.calendar { width: 268px; }

.calendar__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
}
.calendar__title {
    flex: 1;
    text-align: center;
    font-size: var(--t-label-size);
    font-weight: 500;
}
.calendar__nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px; height: 24px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
}
.calendar__nav:hover { background: var(--bg-subtle); color: var(--text-primary); }

.calendar__grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}
.calendar__dow {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 28px;
    font-size: var(--t-meta-size);
    color: var(--text-tertiary);
}
.calendar__day {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 32px;
    background: none;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--t-label-size);
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color var(--motion-fast);
}
.calendar__day:hover { background: var(--bg-subtle); }
.calendar__day--muted { color: var(--text-tertiary); }
.calendar__day--today { background: var(--bg-muted); font-weight: 500; }
.calendar__day--selected {
    background: var(--action-primary);
    color: var(--text-inverse);
    font-weight: 500;
}
.calendar__day--selected:hover { background: var(--action-primary-hover); }

.calendar__footer {
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border);
    text-align: center;
}
.calendar__today-link {
    background: none;
    border: none;
    font-size: var(--t-label-size);
    color: var(--accent-link);
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Confirm dialog — destructive confirmation only (§6 rule 1)
   -------------------------------------------------------------------------- */

.dialog__scrim {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(16, 24, 40, .32);
    z-index: 70;
    animation: fade-in var(--motion-base) both;
}
.dialog {
    width: 400px;
    max-width: calc(100vw - var(--space-8));
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.dialog__title { font-size: var(--t-panel-title-size); font-weight: 600; }
.dialog__body { font-size: var(--t-body-size); color: var(--text-secondary); }
.dialog__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */

.toast-host {
    position: fixed;
    right: var(--space-6);
    bottom: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    z-index: 80;
}
.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 280px;
    max-width: 400px;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    font-size: var(--t-body-size);
    animation: slide-in var(--motion-base) both;
}
.toast__icon { flex-shrink: 0; }
.toast__message { flex: 1; min-width: 0; }
.toast--success .toast__icon { color: var(--tag-success-dot); }
.toast--error .toast__icon { color: var(--tag-danger-dot); }
.toast--info .toast__icon { color: var(--tag-info-dot); }