/* ============================================
   CUSTOM STYLES - ETAPA 7
   ============================================ */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --warning-color: #ea580c;
    --info-color: #0891b2;
    --light-gray: #f3f4f6;
    --border-gray: #e5e7eb;
    --text-dark: #111827;
    --text-light: #6b7280;
    --transition: all 0.3s ease;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

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

html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    background-color: #f9fafb;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */

.animate-fadeIn {
    animation: fadeIn 0.3s ease-in-out;
}

.animate-slideInRight {
    animation: slideInRight 0.4s ease-in-out;
}

.animate-slideInLeft {
    animation: slideInLeft 0.4s ease-in-out;
}

.animate-bounce {
    animation: bounce 0.6s ease-in-out infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-slideUp {
    animation: slideUp 0.5s ease-out;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: 0.375rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

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

.btn-success:hover {
    background-color: #15803d;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 163, 74, 0.4);
}

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

.btn-danger:hover {
    background-color: #b91c1c;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
}

.btn-secondary {
    background-color: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background-color: #4b5563;
    transform: translateY(-2px);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.card-header {
    padding: 0 0 1rem 0;
    border-bottom: 1px solid var(--border-gray);
    margin-bottom: 1rem;
}

.card-body {
    flex: 1;
}

.card-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-gray);
    margin-top: 1rem;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    animation: slideUp 0.3s ease-out;
}

.alert-success {
    background-color: #dcfce7;
    color: #166534;
    border-left: 4px solid var(--success-color);
}

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

.alert-warning {
    background-color: #fed7aa;
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background-color: #cffafe;
    color: #164e63;
    border-left: 4px solid var(--info-color);
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-gray);
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-group.error .form-control {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ============================================
   TABLES
   ============================================ */

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background-color: var(--light-gray);
    border-bottom: 2px solid var(--border-gray);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-gray);
}

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

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-success {
    background-color: #dcfce7;
    color: #166534;
}

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

.badge-warning {
    background-color: #fed7aa;
    color: #92400e;
}

.badge-info {
    background-color: #cffafe;
    color: #164e63;
}

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

/* ============================================
   SPINNERS & LOADERS
   ============================================ */

.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 3px solid var(--border-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-large {
    width: 3rem;
    height: 3rem;
    border-width: 4px;
}

.loading-skeleton {
    background: linear-gradient(90deg, var(--light-gray) 25%, #e0e7ff 50%, var(--light-gray) 75%);
    background-size: 200% 100%;
    animation: pulse 2s ease-in-out infinite;
    border-radius: 0.375rem;
}

/* ============================================
   MODALS
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    animation: fadeIn 0.2s ease-out;
}

.modal-content {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.15);
    max-width: 32rem;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease-out;
}

/* ============================================
   DRAG & DROP
   ============================================ */

.drop-zone {
    border: 2px dashed var(--border-gray);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.drop-zone:hover,
.drop-zone.active {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.drop-zone-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* ============================================
   PROGRESS BAR
   ============================================ */

.progress-bar {
    width: 100%;
    height: 0.5rem;
    background-color: var(--border-gray);
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 9999px;
    transition: width 0.3s ease;
}

.progress-bar-fill.success {
    background-color: var(--success-color);
}

.progress-bar-fill.danger {
    background-color: var(--danger-color);
}

.progress-bar-fill.warning {
    background-color: var(--warning-color);
}

/* ============================================
   TOOLTIPS
   ============================================ */

.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: var(--text-dark);
    color: white;
    text-align: center;
    padding: 0.5rem;
    border-radius: 0.375rem;
    position: absolute;
    z-index: 10;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.875rem;
}

.tooltip .tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--text-dark) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.95rem;
    }

    .card {
        padding: 1rem;
    }

    .table {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
    }

    .modal-content {
        width: 95%;
    }

    .drop-zone {
        padding: 1.5rem;
    }

    .drop-zone-icon {
        font-size: 2.5rem;
    }
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
    width: 0.5rem;
    height: 0.5rem;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: 9999px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-gray);
    border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
    background: #bfdbfe;
}