/* ========================================
   GLOBAL STYLES
======================================== */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-danger: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 5px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* ========================================
   FORM STYLES
======================================== */
.modern-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 16px;
    transition: var(--transition);
    background-color: #f9fafb;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-control:hover {
    border-color: #d1d5db;
}

.form-control.error {
    border-color: var(--danger-color);
    animation: shake 0.3s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.form-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    pointer-events: none;
}

.form-help {
    font-size: 13px;
    color: #6b7280;
    margin-top: 5px;
}

.form-error {
    font-size: 13px;
    color: var(--danger-color);
    margin-top: 5px;
    display: none;
}

.form-control.error ~ .form-error {
    display: block;
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.form-check-input {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.form-check-label {
    cursor: pointer;
    user-select: none;
}

/* ========================================
   BUTTON STYLES
======================================== */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-success {
    background: var(--success-color);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-warning {
    background: var(--warning-color);
    color: white;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-outline-primary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

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

/* ========================================
   MODAL STYLES
======================================== */
.modal-custom {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(5px);
    z-index: 9999;
    animation: fadeIn 0.3s ease;
}

.modal-custom.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-dialog-custom {
    background: white;
    border-radius: 20px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header-custom {
    padding: 25px 30px;
    border-bottom: 2px solid #f3f4f6;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: 20px 20px 0 0;
}

.modal-title-custom {
    font-size: 24px;
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: rgba(255,255,255,0.2);
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255,255,255,0.3);
    transform: rotate(90deg);
}

.modal-body-custom {
    padding: 30px;
}

.modal-footer-custom {
    padding: 20px 30px;
    border-top: 2px solid #f3f4f6;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ========================================
   CARD STYLES
======================================== */
.card-modern {
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
}

.card-modern:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-header-modern {
    padding: 20px 25px;
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    font-size: 18px;
}

.card-body-modern {
    padding: 25px;
}

.card-footer-modern {
    padding: 20px 25px;
    background: #f9fafb;
    border-top: 1px solid #e5e7eb;
}

/* ========================================
   ALERT STYLES
======================================== */
.alert-modern {
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--info-color);
}

/* ========================================
   TABLE STYLES
======================================== */
.table-modern {
    width: 100%;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.table-modern thead {
    background: var(--gradient-primary);
    color: white;
}

.table-modern th {
    padding: 15px 20px;
    font-weight: 600;
    text-align: left;
}

.table-modern td {
    padding: 15px 20px;
    border-bottom: 1px solid #f3f4f6;
}

.table-modern tbody tr:hover {
    background: #f9fafb;
}

/* ========================================
   BADGE STYLES
======================================== */
.badge-modern {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

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

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

/* ========================================
   LOADING SPINNER
======================================== */
.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f4f6;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 768px) {
    .modern-form {
        padding: 25px;
    }
    
    .modal-dialog-custom {
        width: 95%;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
}