/* ==========================================================================
   Shared Component Styles (outside shadow DOM)
   ========================================================================== */

/* ======================================================================
   Buttons
   ====================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px var(--space-lg);
    min-height: 40px;
    font-size: var(--text-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
    text-decoration: none;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.btn-primary:active {
    background: var(--color-primary-active);
}

.btn-secondary {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--color-secondary-hover);
    border-color: var(--color-secondary-hover);
}

.btn-secondary:active {
    background: var(--color-secondary-active);
}

.btn-danger {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: #fff;
}

.btn-danger:hover {
    background: var(--color-danger-hover);
    border-color: var(--color-danger-hover);
}

.btn-danger:active {
    background: var(--color-danger-active);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 6px var(--space-md);
    min-height: 32px;
    font-size: var(--text-sm);
}

.btn-lg {
    padding: 12px var(--space-xl);
    min-height: 48px;
    font-size: var(--text-md);
}

.btn-icon {
    padding: 0;
    width: 40px;
    height: 40px;
    min-height: 40px;
    border-radius: var(--border-radius);
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
    min-height: 32px;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Mobile touch targets — minimum 44px */
@media (max-width: 767px) {
    .btn {
        min-height: 44px;
        padding: 10px var(--space-lg);
    }

    .btn-sm {
        min-height: 44px;
    }

    .btn-icon {
        width: 44px;
        height: 44px;
        min-height: 44px;
    }
}

/* ======================================================================
   Forms
   ====================================================================== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px var(--space-md);
    min-height: 40px;
    font-size: var(--text-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.form-hint {
    font-size: var(--text-xs);
    color: var(--text-muted);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
}

/* Mobile touch targets for inputs */
@media (max-width: 767px) {
    .form-input,
    .form-select,
    .form-textarea {
        min-height: 44px;
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* ======================================================================
   Data Tables
   ====================================================================== */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
}

.data-table {
    width: 100%;
    font-size: var(--text-base);
    text-align: left;
}

.data-table thead {
    background: var(--bg-tertiary);
}

.data-table th {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: var(--space-md) var(--space-lg);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-light);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
    background: var(--bg-hover);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table .cell-actions {
    text-align: right;
    white-space: nowrap;
}

/* Sortable column header */
.data-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.data-table th.sortable:hover {
    color: var(--text-primary);
}

/* ======================================================================
   Badges / Pills
   ====================================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 2px 10px;
    font-size: var(--text-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1.6;
    border-radius: var(--border-radius-full);
    white-space: nowrap;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

.badge-info {
    background: var(--color-info-bg);
    color: var(--color-info);
}

.badge-primary {
    background: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
}

.badge-secondary {
    background: rgba(var(--color-secondary-rgb), 0.1);
    color: var(--color-secondary);
}

/* ======================================================================
   Kanban Board
   ====================================================================== */
.kanban-board {
    display: flex;
    gap: var(--space-lg);
    overflow-x: auto;
    padding-bottom: var(--space-lg);
    min-height: 400px;
    -webkit-overflow-scrolling: touch;
}

.kanban-column {
    flex: 0 0 300px;
    min-width: 280px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - var(--header-height) - 160px);
}

.kanban-column-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.kanban-column-title {
    font-size: var(--text-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.kanban-column-count {
    font-size: var(--text-xs);
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--border-radius-full);
}

.kanban-column-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.kanban-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    cursor: grab;
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.kanban-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-md);
}

.kanban-card:active {
    cursor: grabbing;
}

.kanban-card-title {
    font-size: var(--text-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.kanban-card-meta {
    font-size: var(--text-xs);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* ======================================================================
   Modal
   ====================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius);
    color: var(--text-muted);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    flex: 1;
    padding: var(--space-xl);
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.modal-lg .modal-content {
    max-width: 720px;
}

.modal-xl .modal-content {
    max-width: 960px;
}

/* ======================================================================
   Toast Notifications — fixed bottom-right, stacked
   ====================================================================== */
.toast-container {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-sm);
    pointer-events: none;
    max-width: 400px;
    width: 100%;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
    animation: toast-slide-in var(--transition-slow) ease forwards;
    min-width: 280px;
}

.toast.toast-exit {
    animation: toast-slide-out var(--transition-base) ease forwards;
}

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 1px;
}

.toast-body {
    flex: 1;
    min-width: 0;
}

.toast-title {
    font-size: var(--text-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.toast-message {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: 2px;
}

.toast-close {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.toast-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-danger  { border-left: 3px solid var(--color-danger);  }
.toast-info    { border-left: 3px solid var(--color-info);    }

@keyframes toast-slide-in {
    from {
        opacity: 0;
        transform: translateX(100%) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes toast-slide-out {
    from {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateX(100%) scale(0.95);
    }
}

@media (max-width: 479px) {
    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
        bottom: var(--space-md);
    }
}

/* ======================================================================
   Search Input with Icon
   ====================================================================== */
.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-wrapper .search-icon {
    position: absolute;
    left: var(--space-md);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-input-wrapper .form-input {
    padding-left: 40px;
}

.search-input-wrapper .search-clear {
    position: absolute;
    right: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.search-input-wrapper .search-clear:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ======================================================================
   Empty State
   ====================================================================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    min-height: 300px;
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.empty-state-description {
    font-size: var(--text-base);
    color: var(--text-muted);
    max-width: 400px;
    margin-bottom: var(--space-xl);
}

/* ======================================================================
   Loading Spinner
   ====================================================================== */
.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
    gap: var(--space-lg);
    min-height: 200px;
}

.loading-state-text {
    font-size: var(--text-base);
    color: var(--text-muted);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ======================================================================
   Avatar
   ====================================================================== */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm {
    width: 28px;
    height: 28px;
    font-size: var(--text-xs);
}

.avatar-lg {
    width: 48px;
    height: 48px;
    font-size: var(--text-md);
}

/* ======================================================================
   Dropdown Menu
   ====================================================================== */
.dropdown {
    position: relative;
    display: inline-flex;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-xs);
    min-width: 180px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    padding: var(--space-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-base);
    color: var(--text-secondary);
    border-radius: var(--border-radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
    cursor: pointer;
}

.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown-item.danger {
    color: var(--color-danger);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--space-xs) 0;
}

/* ======================================================================
   Tabs
   ====================================================================== */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
}

.tab:hover {
    color: var(--text-secondary);
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ======================================================================
   Scrollbar Styling
   ====================================================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--bg-tertiary) transparent;
}

/* ======================================================================
   Utility: Truncate
   ====================================================================== */
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ======================================================================
   Utility: Visually Hidden (for accessibility)
   ====================================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}