/* ==================== CSS VARIABLES ==================== */
:root {
    --primary-color: #2c7a3f;
    --primary-dark: #1e5630;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --border-color: #dee2e6;
    --bg-light: #f8f9fa;
    --shadow: 0 2px 10px rgba(0,0,0,0.08);
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-dark);
    background: #f5f6fa;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(44, 122, 63, 0.3);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(44, 122, 63, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
}

.btn-secondary:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(108, 117, 125, 0.4);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #218838 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.btn-success:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(40, 167, 69, 0.4);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c82333 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

.btn-danger:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(220, 53, 69, 0.4);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #e0a800 100%);
    color: #212529;
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
}

.btn-warning:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(255, 193, 7, 0.4);
    transform: translateY(-2px);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #117a8b 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(23, 162, 184, 0.3);
}

.btn-info:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(23, 162, 184, 0.4);
    transform: translateY(-2px);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

/* ==================== FORMS ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-dark);
}

.form-control {
    display: block;
    width: 100%;
    padding: 10px 15px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 122, 63, 0.1);
}

.form-control:disabled {
    background-color: var(--bg-light);
    cursor: not-allowed;
}

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

select.form-control {
    cursor: pointer;
}

.form-text {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-light);
}

.invalid-feedback {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--danger-color);
}

/* ==================== ALERTS ==================== */
.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: opacity 0.3s ease;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid var(--info-color);
}

/* ==================== CARDS ==================== */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    padding: 15px 20px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 16px;
    color: var(--text-dark);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

/* ==================== TABLES ==================== */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

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

.table th {
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-dark);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.table tbody tr:hover {
    background: #f8f9fa;
}

.table-striped tbody tr:nth-child(odd) {
    background: #f8f9fa;
}

/* ==================== SPINNER ==================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0,0,0,0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

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

/* ==================== TOAST NOTIFICATIONS ==================== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10000;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    max-width: 400px;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-message {
    flex: 1;
    font-size: 14px;
    color: var(--text-dark);
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: color 0.3s ease;
}

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

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

.toast-success .toast-icon {
    color: var(--success-color);
}

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

.toast-error .toast-icon {
    color: var(--danger-color);
}

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

.toast-warning .toast-icon {
    color: var(--warning-color);
}

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

.toast-info .toast-icon {
    color: var(--info-color);
}

/* ==================== GLOBAL SPINNER ==================== */
.global-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.global-spinner.active {
    display: flex;
}

.spinner-container {
    text-align: center;
}

.spinner-container .spinner {
    margin: 0 auto 20px;
}

.spinner-container p {
    color: var(--text-dark);
    font-size: 14px;
    font-weight: 600;
}

/* ==================== UTILITY CLASSES ==================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-primary {
    color: var(--primary-color);
}

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

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

.text-warning {
    color: var(--warning-color);
}

.text-info {
    color: var(--info-color);
}

.text-muted {
    color: var(--text-light);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 1rem; }
.ml-4 { margin-left: 1.5rem; }
.ml-5 { margin-left: 3rem; }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 1rem; }
.mr-4 { margin-right: 1.5rem; }
.mr-5 { margin-right: 3rem; }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: 0.25rem; }
.pt-2 { padding-top: 0.5rem; }
.pt-3 { padding-top: 1rem; }
.pt-4 { padding-top: 1.5rem; }
.pt-5 { padding-top: 3rem; }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: 0.25rem; }
.pb-2 { padding-bottom: 0.5rem; }
.pb-3 { padding-bottom: 1rem; }
.pb-4 { padding-bottom: 1.5rem; }
.pb-5 { padding-bottom: 3rem; }

.pl-0 { padding-left: 0; }
.pl-1 { padding-left: 0.25rem; }
.pl-2 { padding-left: 0.5rem; }
.pl-3 { padding-left: 1rem; }
.pl-4 { padding-left: 1.5rem; }
.pl-5 { padding-left: 3rem; }

.pr-0 { padding-right: 0; }
.pr-1 { padding-right: 0.25rem; }
.pr-2 { padding-right: 0.5rem; }
.pr-3 { padding-right: 1rem; }
.pr-4 { padding-right: 1.5rem; }
.pr-5 { padding-right: 3rem; }

.d-none {
    display: none;
}

.d-block {
    display: block;
}

.d-flex {
    display: flex;
}

.d-inline {
    display: inline;
}

.d-inline-block {
    display: inline-block;
}

.flex-column {
    flex-direction: column;
}

.justify-content-center {
    justify-content: center;
}

.justify-content-between {
    justify-content: space-between;
}

.align-items-center {
    align-items: center;
}

.w-100 {
    width: 100%;
}

.h-100 {
    height: 100%;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .toast {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}