.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

/* Button Variants */
.btn-primary {
    background-color: var(--primary-green);
    color: var(--white);
}

.btn-primary:hover {
    background-color: #5da762;
    color: var(--white);
}

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

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

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

.btn-success:hover {
    background-color: #0e9f6e;
    color: var(--white);
}

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

.btn-danger:hover {
    background-color: #dc2626;
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-green);
    border: 1px solid var(--primary-green);
}

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

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

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

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

/* =====================================================
   CARDS
   ===================================================== */
.card {
    background-color: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition-base);
}

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

.card-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--border-gray);
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-6);
    border-top: 1px solid var(--border-gray);
    background-color: var(--background);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--dark-text);
    margin-bottom: var(--spacing-2);
}

.card-text {
    font-size: var(--font-size-base);
    color: var(--body-text);
    line-height: 1.6;
}

.card-img-top {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

/* Campaign Card Specific */
.campaign-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.campaign-card .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.campaign-progress {
    margin-top: auto;
}

/* =====================================================
   FORMS
   ===================================================== */
.form-group {
    margin-bottom: var(--spacing-5);
}

.form-label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--dark-text);
    margin-bottom: var(--spacing-2);
}

.form-label-required::after {
    content: ' *';
    color: var(--error-red);
}

.form-control {
    width: 100%;
    padding: var(--spacing-3);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--dark-text);
    background-color: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(109, 184, 114, 0.1);
}

.form-control::placeholder {
    color: var(--light-gray);
}

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

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--spacing-3) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--spacing-10);
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.form-check-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-check-label {
    font-size: var(--font-size-base);
    color: var(--dark-text);
    cursor: pointer;
}

.form-text {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--light-gray);
    margin-top: var(--spacing-2);
}

.form-error {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--error-red);
    margin-top: var(--spacing-2);
}

.form-control.is-invalid {
    border-color: var(--error-red);
}

.form-control.is-valid {
    border-color: var(--success-green);
}

/* =====================================================
   ALERTS
   ===================================================== */
.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-4);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.alert-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

/* =====================================================
   BADGES
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.badge-primary {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background-color: #dbeafe;
    color: #1e40af;
}

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

/* =====================================================
   PROGRESS BAR
   ===================================================== */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--border-gray);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-green);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--body-text);
    margin-bottom: var(--spacing-2);
}

/* =====================================================
   MODALS
   ===================================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

.modal-dialog {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal.active .modal-dialog {
    transform: scale(1);
}

.modal-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--border-gray);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-3xl);
    color: var(--light-gray);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-6);
}

.modal-footer {
    padding: var(--spacing-6);
    border-top: 1px solid var(--border-gray);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
}

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

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 6px;
}

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

/* =====================================================
   GRID SYSTEM
   ===================================================== */
.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

/* =====================================================
   STATS CARD
   ===================================================== */
.stat-card {
    background-color: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.primary { background-color: #d1fae5; color: var(--primary-green); }
.stat-icon.success { background-color: #d1fae5; color: var(--success-green); }
.stat-icon.warning { background-color: #fef3c7; color: var(--warning-orange); }
.stat-icon.info { background-color: #dbeafe; color: var(--info-blue); }

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--body-text);
    margin-bottom: var(--spacing-1);
}

.stat-value {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--dark-text);
}

/* =====================================================
   EMPTY STATE
   ===================================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-16) var(--spacing-6);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-6);
    color: var(--light-gray);
}

.empty-state-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--dark-text);
    margin-bottom: var(--spacing-2);
}

.empty-state-text {
    font-size: var(--font-size-base);
    color: var(--body-text);
    margin-bottom: var(--spacing-6);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* =====================================================
   TABLE
   ===================================================== */
.table {
    width: 100%;
    border-collapse: collapse;
}

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

.table th {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--dark-text);
    border-bottom: 1px solid var(--border-gray);
}

.table td {
    padding: var(--spacing-4);
    font-size: var(--font-size-base);
    color: var(--body-text);
    border-bottom: 1px solid var(--border-gray);
}

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

/* =====================================================
   PAGINATION
   ===================================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-8);
}

.pagination-item {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-sm);
    color: var(--dark-text);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.pagination-item:hover {
    background-color: var(--background);
    color: var(--dark-text);
}

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

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