/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    padding: var(--sp-sm) var(--sp-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--fw-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    line-height: 1.5;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.4);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-white);
}

.btn-success:hover:not(:disabled) {
    background: #219a52;
}

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

.btn-danger:hover:not(:disabled) {
    background: #c0392b;
}

.btn-warning {
    background: var(--color-warning);
    color: var(--color-dark);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--color-text);
}

.btn-outline:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    background: rgba(var(--color-primary-rgb), 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: var(--sp-xs) var(--sp-sm);
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
}

.btn-sm {
    padding: var(--sp-xs) var(--sp-md);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--sp-md) var(--sp-xl);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ===== CARDS ===== */
.card {
    background: var(--color-dark-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: var(--sp-lg);
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-md);
    padding-bottom: var(--sp-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.card-title {
    font-size: 1rem;
    font-weight: var(--fw-semibold);
    color: var(--color-white);
}

.card-body {
    padding: 0;
}

/* KPI Cards */
.kpi-card {
    background: var(--color-dark-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: var(--sp-lg);
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.kpi-card.accent-green { border-left-color: var(--color-accent); }
.kpi-card.accent-blue { border-left-color: var(--color-info); }
.kpi-card.accent-orange { border-left-color: var(--color-warning); }
.kpi-card.accent-red { border-left-color: var(--color-danger); }

.kpi-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: var(--fw-medium);
    margin-bottom: var(--sp-xs);
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: var(--fw-bold);
    color: var(--color-white);
}

.kpi-change {
    font-size: 0.75rem;
    margin-top: var(--sp-xs);
}

.kpi-change.positive { color: var(--color-success); }
.kpi-change.negative { color: var(--color-danger); }

/* ===== TABLES ===== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table thead {
    background: rgba(255, 255, 255, 0.03);
}

.data-table th {
    padding: var(--sp-md) var(--sp-md);
    text-align: left;
    font-weight: var(--fw-semibold);
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    cursor: pointer;
    user-select: none;
}

.data-table th:hover {
    color: var(--color-white);
}

.data-table th .sort-icon {
    margin-left: var(--sp-xs);
    opacity: 0.4;
}

.data-table th.sorted .sort-icon {
    opacity: 1;
    color: var(--color-primary-light);
}

.data-table td {
    padding: var(--sp-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--color-text);
}

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

.data-table tbody tr:hover {
    background: rgba(var(--color-primary-rgb), 0.05);
}

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

.table-actions {
    display: flex;
    gap: var(--sp-xs);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-md);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.pagination-info {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
}

.pagination-controls {
    display: flex;
    gap: var(--sp-xs);
}

.pagination-btn {
    padding: var(--sp-xs) var(--sp-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 32px;
    text-align: center;
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

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

.pagination-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--sp-md);
}

.form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--sp-xs);
}

.form-control {
    width: 100%;
    padding: var(--sp-sm) var(--sp-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

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

.form-control.error {
    border-color: var(--color-danger);
}

.form-error {
    font-size: 0.75rem;
    color: var(--color-danger);
    margin-top: var(--sp-xs);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--sp-md) center;
    padding-right: var(--sp-xl);
}

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

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

/* ===== BADGES ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--sp-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: var(--fw-medium);
    white-space: nowrap;
}

.badge-active, .badge-paid, .badge-resolved { background: rgba(39, 174, 96, 0.15); color: #4cd787; }
.badge-pending, .badge-draft { background: rgba(255, 255, 255, 0.08); color: var(--color-text-secondary); }
.badge-suspended, .badge-overdue, .badge-critical { background: rgba(231, 76, 60, 0.15); color: #f1948a; }
.badge-cancelled { background: rgba(255, 255, 255, 0.05); color: var(--color-text-muted); text-decoration: line-through; }
.badge-sent, .badge-open, .badge-medium { background: rgba(52, 152, 219, 0.15); color: #7ec8e3; }
.badge-in_progress, .badge-high, .badge-warning { background: rgba(243, 156, 18, 0.15); color: #f5c842; }
.badge-partially_paid { background: rgba(var(--color-primary-rgb), 0.15); color: var(--color-primary-light); }
.badge-low { background: rgba(255, 255, 255, 0.05); color: var(--color-text-muted); }

/* ===== MODALS ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity var(--transition-fast);
    padding: var(--sp-lg);
}

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

.modal {
    background: var(--color-dark-lighter);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-normal);
}

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

.modal.modal-lg {
    max-width: 800px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.modal-title {
    font-size: 1.125rem;
    font-weight: var(--fw-semibold);
    color: var(--color-white);
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--sp-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
}

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

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--sp-sm);
    padding: var(--sp-md) var(--sp-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    top: var(--sp-lg);
    right: var(--sp-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    padding: var(--sp-md) var(--sp-lg);
    border-radius: var(--radius-md);
    background: var(--color-dark-lighter);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    max-width: 450px;
    animation: slideIn 0.3s ease;
    font-size: 0.875rem;
}

.toast.removing {
    animation: slideOut 0.3s ease forwards;
}

.toast-success { border-left: 4px solid var(--color-success); }
.toast-error { border-left: 4px solid var(--color-danger); }
.toast-warning { border-left: 4px solid var(--color-warning); }
.toast-info { border-left: 4px solid var(--color-info); }

.toast-message { flex: 1; color: var(--color-text); }

.toast-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    line-height: 1;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* ===== FILTERS / TOOLBAR ===== */
.toolbar {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    margin-bottom: var(--sp-lg);
    flex-wrap: wrap;
}

.search-input {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 400px;
}

.search-input input {
    width: 100%;
    padding-left: var(--sp-xl);
}

.search-input::before {
    content: '';
    position: absolute;
    left: var(--sp-md);
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236a6b6c' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242.156a5 5 0 1 1 0-10 5 5 0 0 1 0 10z'/%3E%3C/svg%3E") no-repeat;
}

.filter-chips {
    display: flex;
    gap: var(--sp-xs);
    flex-wrap: wrap;
}

.chip {
    padding: var(--sp-xs) var(--sp-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: transparent;
}

.chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

.chip.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* ===== TABS ===== */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: var(--sp-lg);
}

.tab {
    padding: var(--sp-sm) var(--sp-lg);
    font-size: 0.875rem;
    font-weight: var(--fw-medium);
    color: var(--color-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}

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

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

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: var(--sp-2xl);
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--sp-md);
    opacity: 0.3;
}

.empty-state h3 {
    color: var(--color-text-secondary);
    margin-bottom: var(--sp-sm);
}

/* ===== LOADING ===== */
.loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid rgba(var(--color-primary-rgb), 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sp-2xl);
    gap: var(--sp-md);
    color: var(--color-text-muted);
}

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

/* ===== GRID UTILS ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-lg); }

/* ===== FLEX UTILS ===== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--sp-sm); }
.gap-md { gap: var(--sp-md); }
.gap-lg { gap: var(--sp-lg); }

/* ===== TEXT UTILS ===== */
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: 0.8125rem; }
.text-right { text-align: right; }
.font-bold { font-weight: var(--fw-bold); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }