/* ./src/shared/components.css */

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover {
    background: var(--color-bg);
    border-color: var(--color-text-muted);
}

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

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

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

.btn-danger:hover {
    background: var(--color-negative);
    color: #FFFFFF;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Form Elements
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    transition: border-color 0.15s ease;
}

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

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

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-negative);
    margin-top: var(--spacing-xs);
}

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

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.15s ease;
}

.card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.card-body {
    /* Content area */
}

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--spacing-sm);
    border-radius: 999px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    line-height: 1.4;
}

.badge-default {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.badge-accent {
    background: var(--color-accent-light);
    color: var(--color-accent-dark);
}

.badge-success {
    background: #DCFCE7;
    color: var(--color-positive);
}

.badge-danger {
    background: #FEE2E2;
    color: var(--color-negative);
}

.badge-warning {
    background: #FEF3C7;
    color: #D97706;
}

/* Status-specific badges (from ui.md) */
.badge-active {
    background: #F3E5F5;
    color: #9932CC;
}

.badge-paid {
    background: #DCFCE7;
    color: #16A34A;
}

.badge-partial {
    background: #FEF9C3;
    color: #CA8A04;
}

.badge-overdue {
    background: #FEE2E2;
    color: #DC2626;
}

.badge-void {
    background: #F3F4F6;
    color: #6B7280;
    text-decoration: line-through;
}

/* ============================================
   Metric Cards (Dashboard)
   ============================================ */
.metric-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
}

.metric-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
}

.metric-value.positive {
    color: var(--color-positive);
}

.metric-value.negative {
    color: var(--color-negative);
}

/* ============================================
   Tables (Base — Tabulator extends this)
   ============================================ */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.data-table th {
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table tr:nth-child(even) {
    background: #FAFAFA;
}

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

/* ============================================
   Page Header (Title + Actions)
   ============================================ */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.page-header-left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.page-header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   Modal / Dialog
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

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

.modal {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: translateY(10px);
    transition: transform 0.2s ease;
}

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

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

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: var(--spacing-xs);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   Loading Spinner
   ============================================ */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ============================================
   Utility Classes
   ============================================ */
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-accent { color: var(--color-accent-dark); }
.text-positive { color: var(--color-positive); }
.text-negative { color: var(--color-negative); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-mono { font-family: 'SF Mono', 'Fira Code', monospace; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.hidden { display: none !important; }

/* ============================================
   Money / Tabular Numbers
   ============================================ */
.money {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.money-positive {
    color: var(--color-positive);
}

.money-negative {
    color: var(--color-negative);
}

/* ============================================
   Loading Overlay
   ============================================ */
.loading-overlay {
    opacity: 0.6;
    pointer-events: none;
}

/* ============================================
   Confirmation Dialog
   ============================================ */
.confirm-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================================
   Filters Bar (Shared across modules)
   ============================================ */
.filters-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filters-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    flex: 1;
}

.filters-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.search-wrapper {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 320px;
}

.search-wrapper .search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-wrapper .search-input {
    padding-left: 34px;
}

.filter-select {
    min-width: 140px;
    max-width: 180px;
}

/* ============================================
   Pagination (Shared across modules)
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

.pagination-btn:hover {
    background: var(--color-bg);
    border-color: var(--color-text-muted);
}

.pagination-btn.active {
    background: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-info {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin: 0 var(--spacing-sm);
}

/* ============================================
   Back Link (Shared across modules)
   ============================================ */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    transition: color 0.15s ease;
}

.back-link:hover {
    color: var(--color-accent-dark);
}

.back-link svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Form Row (Side-by-side fields)
   ============================================ */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* ============================================
   Empty State (Shared)
   ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-muted);
}

.empty-state-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.empty-state-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

/* ============================================
   Tabs (Shared across modules)
   ============================================ */
.tabs-nav {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

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

.tab-btn.active {
    color: var(--color-accent-dark);
    border-bottom-color: var(--color-accent);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* ============================================
   Notes & Meta shared styles
   ============================================ */
.notes-header,
.meta-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--spacing-md);
}

.notes-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: none;
    background: none;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s ease;
    margin-left: auto;
}

.btn-icon:hover {
    color: var(--color-negative);
    background: #FEE2E2;
}

.btn-icon svg {
    width: 14px;
    height: 14px;
}

/* ============================================
   Responsive Breakpoints
   ============================================ */
@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Responsive — Tablet (768–1024px)
   ============================================ */
@media (max-width: 1024px) {
    .page-header {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    .page-header-actions {
        flex-wrap: wrap;
    }
    .modal {
        max-width: 90vw;
    }
}

/* ============================================
   Responsive — Mobile (<768px)
   ============================================ */
@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    .page-header-actions {
        width: 100%;
        flex-wrap: wrap;
    }
    .page-header-actions .btn {
        flex: 1;
        min-width: 0;
        justify-content: center;
    }

    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .filters-left,
    .filters-right {
        flex-wrap: wrap;
        width: 100%;
    }
    .search-wrapper {
        max-width: none;
        min-width: 0;
        width: 100%;
    }
    .filter-select {
        min-width: 0;
        max-width: none;
        flex: 1;
    }

    .modal {
        max-width: 100vw;
        max-height: 100vh;
        border-radius: 0;
        margin: 0;
        height: 100vh;
    }
    .modal-overlay {
        align-items: flex-end;
    }
    .modal-overlay.active .modal {
        border-radius: var(--border-radius) var(--border-radius) 0 0;
        height: auto;
        max-height: 92vh;
    }

    .modal-header {
        padding: var(--spacing-md);
        position: sticky;
        top: 0;
        background: var(--color-surface);
        z-index: 1;
    }
    .modal-body {
        padding: var(--spacing-md);
    }
    .modal-footer {
        padding: var(--spacing-sm) var(--spacing-md);
        position: sticky;
        bottom: 0;
        background: var(--color-surface);
        z-index: 1;
    }

    .tabs-nav {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .tabs-nav::-webkit-scrollbar {
        display: none;
    }
    .tab-btn {
        padding: var(--spacing-sm) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }

    .pagination {
        flex-wrap: wrap;
    }

    .metric-card {
        padding: var(--spacing-md);
    }

    .card {
        padding: var(--spacing-md);
    }

    .back-link {
        margin-bottom: var(--spacing-md);
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .notes-header,
    .meta-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }
}

/* ============================================
   Responsive — Small Mobile (<480px)
   ============================================ */
@media (max-width: 480px) {
    .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    .btn-lg {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }

    .badge {
        font-size: 0.65rem;
        padding: 1px 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
        font-size: var(--font-size-base); /* 16px prevents iOS zoom */
    }

    .empty-state {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    .empty-state svg {
        width: 36px;
        height: 36px;
    }
}

/* ============================================
   Searchable Select Dropdown (shared)
   ============================================ */
.searchable-select-wrapper {
    position: relative;
}

.searchable-input {
    padding-right: var(--spacing-lg);
}

.searchable-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 240px;
    overflow-y: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 200;
}

.searchable-dropdown.open {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background 0.1s ease;
}

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

.dropdown-item .text-muted {
    font-size: var(--font-size-xs);
}

.dropdown-create {
    border-top: 1px solid var(--color-border);
    color: var(--color-accent-dark);
    font-weight: 500;
    gap: var(--spacing-sm);
    justify-content: flex-start;
}

.dropdown-create:hover {
    background: var(--color-accent-light);
}

.dropdown-create svg {
    width: 14px;
    height: 14px;
}

@media (max-width: 768px) {
    .searchable-dropdown {
        max-height: 200px;
    }
}