/**
 * Button UI kit — flat blue system (matches design reference).
 * Load after Bootstrap. Dark theme: body.user-panel
 */

:root {
    /* Kit blues */
    --kit-blue: #2196f3;
    --kit-blue-dark: #1976d2;
    --kit-blue-light: #64b5f6;
    --kit-blue-soft: #e3f2fd;
    --kit-blue-border: #2196f3;
    --kit-blue-text: #1976d2;

    --btn-radius: 6px;
    --btn-radius-sm: 4px;
    --btn-radius-pill: 50px;
    --btn-font-weight: 500;
    --btn-font-size: 0.9375rem;
    --btn-font-size-sm: 0.8125rem;
    --btn-padding-y: 0.5rem;
    --btn-padding-x: 1.125rem;
    --btn-padding-y-sm: 0.375rem;
    --btn-padding-x-sm: 0.875rem;
    --btn-gap: 0.5rem;
    --btn-border-width: 2px;

    --btn-primary-bg: var(--kit-blue);
    --btn-primary-hover: var(--kit-blue-dark);
    --btn-primary-color: #fff;

    --btn-soft-bg: var(--kit-blue-light);
    --btn-soft-hover: #42a5f5;
    --btn-soft-color: #fff;

    --btn-secondary-bg: #fff;
    --btn-secondary-border: #bdbdbd;
    --btn-secondary-color: #424242;
    --btn-secondary-hover-bg: #fafafa;

    --btn-outline-bg: #fff;
    --btn-outline-primary-border: var(--kit-blue-border);
    --btn-outline-primary-color: var(--kit-blue-text);
    --btn-outline-primary-hover-bg: var(--kit-blue-soft);

    --btn-danger-bg: #e53935;
    --btn-danger-hover: #c62828;

    --btn-dark-bg: #37474f;
    --btn-dark-hover: #263238;
}

body.user-panel {
    --btn-secondary-bg: transparent;
    --btn-secondary-border: #4a4a52;
    --btn-secondary-color: #e4e4e7;
    --btn-secondary-hover-bg: #25252b;

    --btn-outline-bg: transparent;
    --btn-outline-primary-hover-bg: rgba(33, 150, 243, 0.12);
}

/* —— Base (kit: clean sans, flat) —— */
.btn,
a.btn,
button.btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: var(--btn-gap);
    padding: var(--btn-padding-y) var(--btn-padding-x) !important;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif !important;
    font-size: var(--btn-font-size) !important;
    font-weight: var(--btn-font-weight) !important;
    line-height: 1.35 !important;
    letter-spacing: 0.01em;
    border-radius: var(--btn-radius) !important;
    border-width: var(--btn-border-width) !important;
    border-style: solid !important;
    text-decoration: none !important;
    box-shadow: none !important;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-sm {
    padding: var(--btn-padding-y-sm) var(--btn-padding-x-sm) !important;
    font-size: var(--btn-font-size-sm) !important;
    border-radius: var(--btn-radius-sm) !important;
}

.btn-lg {
    padding: 0.625rem 1.375rem !important;
    font-size: 1rem !important;
}

.btn:hover:not(:disabled):not(.disabled),
a.btn:hover {
    transform: none !important;
    box-shadow: none !important;
}

.btn:focus-visible {
    outline: 2px solid var(--kit-blue);
    outline-offset: 2px;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Sharp corners (kit row 1, left) */
.btn-sharp,
.btn-group-sharp > .btn {
    border-radius: 0 !important;
}

/* Pill (kit row 1, right) */
.btn-pill,
.btn.rounded-pill {
    border-radius: var(--btn-radius-pill) !important;
    padding-left: 1.35rem !important;
    padding-right: 1.35rem !important;
}

/* —— Solid primary (bright blue) —— */
.btn-primary,
.btn-up-primary {
    background-color: var(--btn-primary-bg) !important;
    border-color: var(--btn-primary-bg) !important;
    color: var(--btn-primary-color) !important;
}

.btn-primary:hover:not(:disabled):not(.disabled),
.btn-up-primary:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-primary-hover) !important;
    border-color: var(--btn-primary-hover) !important;
    color: #fff !important;
}

.btn-primary:active:not(:disabled):not(.disabled),
.btn-up-primary:active:not(:disabled):not(.disabled) {
    background-color: #1565c0 !important;
    border-color: #1565c0 !important;
}

/* —— Soft / light solid (kit sky button) —— */
.btn-soft,
.btn-info {
    background-color: var(--btn-soft-bg) !important;
    border-color: var(--btn-soft-bg) !important;
    color: var(--btn-soft-color) !important;
}

.btn-soft:hover:not(:disabled):not(.disabled),
.btn-info:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-soft-hover) !important;
    border-color: var(--btn-soft-hover) !important;
    color: #fff !important;
}

/* —— Secondary (neutral outline-ish) —— */
.btn-secondary {
    background-color: var(--btn-secondary-bg) !important;
    border-color: var(--btn-secondary-border) !important;
    color: var(--btn-secondary-color) !important;
}

.btn-secondary:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-secondary-hover-bg) !important;
    border-color: var(--btn-secondary-border) !important;
    color: var(--btn-secondary-color) !important;
}

/* —— Outline primary (kit: white + blue border) —— */
.btn-outline-primary {
    background-color: var(--btn-outline-bg) !important;
    border-color: var(--btn-outline-primary-border) !important;
    color: var(--btn-outline-primary-color) !important;
}

.btn-outline-primary:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-outline-primary-hover-bg) !important;
    border-color: var(--kit-blue-dark) !important;
    color: var(--kit-blue-dark) !important;
}

/* —— Outline secondary —— */
.btn-outline-secondary {
    background-color: var(--btn-outline-bg) !important;
    border-color: var(--btn-secondary-border) !important;
    color: var(--btn-secondary-color) !important;
}

.btn-outline-secondary:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-secondary-hover-bg) !important;
    border-color: #9e9e9e !important;
    color: var(--btn-secondary-color) !important;
}

body.user-panel .btn-outline-secondary {
    border-color: #4a4a52 !important;
    color: #d4d4d8 !important;
}

body.user-panel .btn-outline-secondary:hover:not(:disabled):not(.disabled) {
    background-color: #25252b !important;
    border-color: #6b6b76 !important;
    color: #f4f4f5 !important;
}

/* —— Danger —— */
.btn-danger {
    background-color: var(--btn-danger-bg) !important;
    border-color: var(--btn-danger-bg) !important;
    color: #fff !important;
}

.btn-danger:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-danger-hover) !important;
    border-color: var(--btn-danger-hover) !important;
}

.btn-outline-danger {
    background-color: transparent !important;
    border-color: #ef9a9a !important;
    color: #e53935 !important;
}

.btn-outline-danger:hover:not(:disabled):not(.disabled) {
    background-color: #ffebee !important;
    border-color: #e53935 !important;
    color: #c62828 !important;
}

body.user-panel .btn-outline-danger {
    border-color: rgba(229, 57, 53, 0.5) !important;
    color: #ef9a9a !important;
}

body.user-panel .btn-outline-danger:hover:not(:disabled):not(.disabled) {
    background-color: rgba(229, 57, 53, 0.12) !important;
    color: #ffcdd2 !important;
}

/* —— Dark / link / text —— */
.btn-dark {
    background-color: var(--btn-dark-bg) !important;
    border-color: var(--btn-dark-bg) !important;
    color: #fff !important;
}

.btn-dark:hover:not(:disabled):not(.disabled) {
    background-color: var(--btn-dark-hover) !important;
    border-color: var(--btn-dark-hover) !important;
}

.btn-link {
    background: none !important;
    border-color: transparent !important;
    color: var(--kit-blue) !important;
    font-weight: 500 !important;
    padding: 0 !important;
    min-height: unset;
}

.btn-link:hover {
    color: var(--kit-blue-dark) !important;
    text-decoration: underline !important;
}

.btn-outline-light {
    background: transparent !important;
    border-color: rgba(255, 255, 255, 0.5) !important;
    color: #fff !important;
}

.btn-outline-light:hover:not(:disabled):not(.disabled) {
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: #fff !important;
}

/* —— Icon-only circle (kit FAB / icon buttons) —— */
.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0 !important;
    border-radius: 50% !important;
}

.btn-icon.btn-sm {
    width: 2rem;
    height: 2rem;
}

.btn-icon.btn-fab {
    background-color: var(--kit-blue) !important;
    border-color: var(--kit-blue) !important;
    color: #fff !important;
    box-shadow: 0 3px 8px rgba(33, 150, 243, 0.35) !important;
}

.btn-icon.btn-fab:hover:not(:disabled):not(.disabled) {
    background-color: var(--kit-blue-dark) !important;
    border-color: var(--kit-blue-dark) !important;
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.4) !important;
}

.btn-icon.btn-outline-icon {
    background: #fff !important;
    border-color: #e0e0e0 !important;
    color: #9e9e9e !important;
}

body.user-panel .btn-icon.btn-outline-icon {
    background: transparent !important;
    border-color: #4a4a52 !important;
    color: #9ca3af !important;
}

/* —— Nav prev/next (kit bottom row) —— */
.btn-nav {
    gap: 0.35rem;
}

/* —— App: gallery filters (text tabs) —— */
.up-filter-btn {
    background: none !important;
    border: none !important;
    color: var(--up-muted, #9ca3af);
    padding: 0.25rem 0 !important;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    min-height: unset;
}

.up-filter-btn:hover,
.up-filter-btn.active {
    color: var(--kit-blue, #2196f3);
}

.up-filter-btn.active {
    font-weight: 600;
}

/* —— App: model tiles —— */
.up-model-card {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    border-radius: var(--btn-radius);
    border: var(--btn-border-width) solid transparent;
    background: var(--up-surface-2, #f5f5f5);
    color: #757575;
    font-size: 0.65rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

body.user-panel .up-model-card {
    background: var(--up-surface-2, #25252b);
    color: var(--up-muted, #9ca3af);
}

.up-model-card:hover {
    border-color: #bdbdbd;
    color: #424242;
}

body.user-panel .up-model-card:hover {
    border-color: #4a4a52;
    color: #f4f4f5;
}

.up-model-card.selected {
    border-color: var(--kit-blue);
    background: var(--kit-blue-soft);
    color: var(--kit-blue-dark);
}

body.user-panel .up-model-card.selected {
    background: rgba(33, 150, 243, 0.12);
    color: #90caf9;
}

/* —— App: dashboard quick actions —— */
.up-dash-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.up-dash-action {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    border-radius: var(--btn-radius);
    border: var(--btn-border-width) solid var(--btn-secondary-border);
    background: var(--btn-outline-bg);
    color: var(--btn-secondary-color);
    text-decoration: none !important;
    font-size: 0.9375rem;
    font-weight: 500;
}

body.user-panel .up-dash-action {
    background: transparent;
    border-color: #4a4a52;
    color: #e4e4e7;
}

.up-dash-action:hover {
    background: var(--btn-secondary-hover-bg);
    border-color: #9e9e9e;
    color: var(--btn-secondary-color);
}

body.user-panel .up-dash-action:hover {
    background: #25252b;
    border-color: #6b6b76;
    color: #f4f4f5;
}

.up-dash-action--primary {
    background-color: var(--kit-blue-soft) !important;
    border-color: var(--kit-blue) !important;
    color: var(--kit-blue-dark) !important;
}

body.user-panel .up-dash-action--primary {
    background-color: rgba(33, 150, 243, 0.12) !important;
    border-color: var(--kit-blue) !important;
    color: #90caf9 !important;
}

.up-dash-action--primary:hover {
    background-color: #bbdefb !important;
    border-color: var(--kit-blue-dark) !important;
}

body.user-panel .up-dash-action--primary:hover {
    background-color: rgba(33, 150, 243, 0.2) !important;
    color: #e3f2fd !important;
}

.up-dash-action-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--btn-radius-sm);
    background: #f5f5f5;
    color: #757575;
    flex-shrink: 0;
}

body.user-panel .up-dash-action-icon {
    background: rgba(0, 0, 0, 0.2);
    color: #9ca3af;
}

.up-dash-action--primary .up-dash-action-icon {
    background: rgba(33, 150, 243, 0.15);
    color: var(--kit-blue);
}

/* —— App: gallery overlay buttons —— */
.up-card-preview,
.up-card-menu,
.up-card-download {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 !important;
    border: none !important;
    color: #fff !important;
    cursor: pointer;
    text-decoration: none !important;
    min-width: unset;
    border-radius: var(--btn-radius-sm) !important;
    background: rgba(0, 0, 0, 0.5) !important;
}

.up-card-preview,
.up-card-menu {
    top: 0.5rem;
    right: 0.5rem;
    width: 28px;
    height: 28px;
}

.up-card-download {
    bottom: 0.5rem;
    right: 0.5rem;
    width: 32px;
    height: 32px;
}

.up-card-preview:hover,
.up-card-menu:hover,
.up-card-download:hover {
    background: var(--kit-blue) !important;
}

.up-preview-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 36px;
    height: 36px;
    padding: 0 !important;
    border: none !important;
    border-radius: var(--btn-radius-sm) !important;
    background: transparent !important;
    color: #9e9e9e !important;
    font-size: 1.75rem;
    line-height: 1;
}

body.user-panel .up-preview-close {
    color: var(--up-muted, #9ca3af) !important;
}

.up-preview-close:hover {
    color: #424242 !important;
    background: #f5f5f5 !important;
}

body.user-panel .up-preview-close:hover {
    color: #f4f4f5 !important;
    background: #25252b !important;
}

.up-preview-stage .up-preview-menu {
    top: 0.75rem;
    right: 0.75rem;
    width: 32px;
    height: 32px;
    z-index: 2;
}

.up-preview-stage .up-preview-download {
    bottom: 0.75rem;
    right: 0.75rem;
    width: 40px;
    height: 40px;
    border-radius: 50% !important;
    z-index: 2;
}