/* =====================================================================
   FORMULARIOS MODERNOS - DISEÑO ELEGANTE Y PROFESIONAL
   Sistema de formularios de clase mundial sin animaciones excesivas
   ===================================================================== */

:root {
    /* Colores para formularios */
    --form-primary: #2563eb;
    --form-primary-light: #3b82f6;
    --form-primary-dark: #1d4ed8;
    --form-success: #10b981;
    --form-error: #ef4444;
    --form-warning: #f59e0b;

    /* Grises */
    --form-gray-50: #f9fafb;
    --form-gray-100: #f3f4f6;
    --form-gray-200: #e5e7eb;
    --form-gray-300: #d1d5db;
    --form-gray-400: #9ca3af;
    --form-gray-500: #6b7280;
    --form-gray-600: #4b5563;
    --form-gray-700: #374151;
    --form-gray-800: #1f2937;
    --form-gray-900: #111827;

    /* Espaciado */
    --form-space-1: 0.25rem;
    --form-space-2: 0.5rem;
    --form-space-3: 0.75rem;
    --form-space-4: 1rem;
    --form-space-5: 1.25rem;
    --form-space-6: 1.5rem;

    /* Bordes */
    --form-radius: 0.5rem;
    --form-radius-sm: 0.375rem;
    --form-radius-lg: 0.75rem;

    /* Sombras */
    --form-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --form-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --form-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --form-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --form-shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.1);

    /* Transiciones */
    --form-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================================
   CONTENEDORES DE FORMULARIO
   ===================================================================== */

.modern-form-container {
    background: white;
    border-radius: var(--form-radius-lg);
    box-shadow: var(--form-shadow);
    padding: var(--form-space-6);
    margin-bottom: var(--form-space-6);
}

.modern-form-section {
    background: var(--form-gray-50);
    border-radius: var(--form-radius);
    padding: var(--form-space-5);
    margin-bottom: var(--form-space-5);
    border: 1px solid var(--form-gray-200);
}

.modern-form-section:last-child {
    margin-bottom: 0;
}

.modern-form-section-title {
    margin: 0 0 var(--form-space-4) 0;
    color: var(--form-gray-900);
    font-size: 1.125rem;
    font-weight: 600;
    padding-bottom: var(--form-space-3);
    border-bottom: 2px solid var(--form-primary);
    display: flex;
    align-items: center;
    gap: var(--form-space-2);
}

/* =====================================================================
   GRUPOS DE CAMPOS
   ===================================================================== */

.modern-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--form-space-4);
}

.modern-form-group {
    display: flex;
    flex-direction: column;
    gap: var(--form-space-2);
}

.modern-form-group.full-width {
    grid-column: 1 / -1;
}

.modern-form-label {
    font-weight: 600;
    color: var(--form-gray-700);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--form-space-1);
}

.modern-form-label .required {
    color: var(--form-error);
}

/* =====================================================================
   CAMPOS DE ENTRADA - DISEÑO MODERNO
   ===================================================================== */

.modern-input,
.modern-select,
.modern-textarea,
/* Clases de Django por defecto */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="time"],
input[type="tel"],
input[type="url"],
input[type="file"],
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--form-gray-900);
    background: white;
    border: 1.5px solid var(--form-gray-300);
    border-radius: var(--form-radius-sm);
    transition: var(--form-transition);
    box-shadow: var(--form-shadow-sm);
}

/* Estado hover */
.modern-input:hover,
.modern-select:hover,
.modern-textarea:hover,
input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
input[type="number"]:hover,
input[type="date"]:hover,
input[type="datetime-local"]:hover,
input[type="time"]:hover,
input[type="tel"]:hover,
input[type="url"]:hover,
input[type="file"]:hover,
select:hover,
textarea:hover {
    border-color: var(--form-gray-400);
    box-shadow: var(--form-shadow);
}

/* Estado focus */
.modern-input:focus,
.modern-select:focus,
.modern-textarea:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="datetime-local"]:focus,
input[type="time"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="file"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--form-primary);
    box-shadow: var(--form-shadow-focus), var(--form-shadow);
    background: white;
}

/* Estados de validación */
.modern-input.is-valid,
.modern-select.is-valid,
.modern-textarea.is-valid {
    border-color: var(--form-success);
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2310b981'%3E%3Cpath fill-rule='evenodd' d='M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    background-size: 1.25rem;
}

.modern-input.is-invalid,
.modern-select.is-invalid,
.modern-textarea.is-invalid {
    border-color: var(--form-error);
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23ef4444'%3E%3Cpath fill-rule='evenodd' d='M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    background-size: 1.25rem;
}

/* Campos deshabilitados */
.modern-input:disabled,
.modern-select:disabled,
.modern-textarea:disabled {
    background-color: var(--form-gray-100);
    border-color: var(--form-gray-200);
    color: var(--form-gray-500);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Placeholder mejorado */
.modern-input::placeholder,
.modern-textarea::placeholder {
    color: var(--form-gray-400);
    opacity: 1;
}

/* =====================================================================
   TEXTAREA
   ===================================================================== */

.modern-textarea,
textarea {
    min-height: 100px;
    resize: vertical;
    line-height: 1.6;
}

.modern-textarea:focus,
textarea:focus {
    min-height: 120px;
}

/* =====================================================================
   SELECT MEJORADO
   ===================================================================== */

.modern-select,
select {
    cursor: pointer;
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    background-size: 1.25rem;
    appearance: none;
}

.modern-select:hover,
select:hover {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23374151'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
}

.modern-select:focus,
select:focus {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%232563eb'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
}

/* =====================================================================
   CAMPOS ESPECIALES
   ===================================================================== */

/* Campos de fecha y hora */
.modern-input[type="date"],
.modern-input[type="datetime-local"],
.modern-input[type="time"] {
    padding-right: 0.875rem;
}

.modern-input[type="date"]::-webkit-calendar-picker-indicator,
.modern-input[type="datetime-local"]::-webkit-calendar-picker-indicator,
.modern-input[type="time"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.6;
    transition: var(--form-transition);
}

.modern-input[type="date"]:hover::-webkit-calendar-picker-indicator,
.modern-input[type="datetime-local"]:hover::-webkit-calendar-picker-indicator,
.modern-input[type="time"]:hover::-webkit-calendar-picker-indicator {
    opacity: 1;
}

/* Campos numéricos */
.modern-input[type="number"] {
    padding-right: 0.5rem;
}

/* Checkboxes y radio buttons modernos */
.modern-checkbox,
.modern-radio {
    width: 1.125rem;
    height: 1.125rem;
    border: 1.5px solid var(--form-gray-300);
    border-radius: var(--form-radius-sm);
    cursor: pointer;
    transition: var(--form-transition);
}

.modern-radio {
    border-radius: 50%;
}

.modern-checkbox:hover,
.modern-radio:hover {
    border-color: var(--form-primary);
}

.modern-checkbox:checked,
.modern-radio:checked {
    background-color: var(--form-primary);
    border-color: var(--form-primary);
}

.modern-checkbox:focus,
.modern-radio:focus {
    outline: none;
    box-shadow: var(--form-shadow-focus);
}

/* =====================================================================
   MENSAJES DE AYUDA Y ERROR
   ===================================================================== */

.modern-form-help {
    font-size: 0.8125rem;
    color: var(--form-gray-500);
    margin-top: var(--form-space-1);
    display: flex;
    align-items: start;
    gap: var(--form-space-1);
}

.modern-form-error {
    font-size: 0.8125rem;
    color: var(--form-error);
    margin-top: var(--form-space-1);
    display: flex;
    align-items: start;
    gap: var(--form-space-1);
    font-weight: 500;
}

.modern-form-success {
    font-size: 0.8125rem;
    color: var(--form-success);
    margin-top: var(--form-space-1);
    display: flex;
    align-items: start;
    gap: var(--form-space-1);
    font-weight: 500;
}

/* =====================================================================
   BOTONES DE FORMULARIO
   ===================================================================== */

.modern-form-actions {
    display: flex;
    gap: var(--form-space-3);
    margin-top: var(--form-space-6);
    padding-top: var(--form-space-5);
    border-top: 1px solid var(--form-gray-200);
}

.modern-btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--form-radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--form-transition);
    display: inline-flex;
    align-items: center;
    gap: var(--form-space-2);
    text-decoration: none;
    line-height: 1.5;
}

.modern-btn-primary {
    background: var(--form-primary);
    color: white;
    box-shadow: var(--form-shadow-sm);
}

.modern-btn-primary:hover {
    background: var(--form-primary-dark);
    box-shadow: var(--form-shadow-md);
    transform: translateY(-1px);
}

.modern-btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--form-shadow-sm);
}

.modern-btn-secondary {
    background: white;
    color: var(--form-gray-700);
    border: 1.5px solid var(--form-gray-300);
    box-shadow: var(--form-shadow-sm);
}

.modern-btn-secondary:hover {
    background: var(--form-gray-50);
    border-color: var(--form-gray-400);
    box-shadow: var(--form-shadow);
    transform: translateY(-1px);
}

.modern-btn-secondary:active {
    transform: translateY(0);
    box-shadow: var(--form-shadow-sm);
}

.modern-btn-danger {
    background: var(--form-error);
    color: white;
    box-shadow: var(--form-shadow-sm);
}

.modern-btn-danger:hover {
    background: #dc2626;
    box-shadow: var(--form-shadow-md);
    transform: translateY(-1px);
}

.modern-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* =====================================================================
   ALERTAS Y NOTIFICACIONES
   ===================================================================== */

.modern-alert {
    padding: var(--form-space-4);
    border-radius: var(--form-radius);
    margin-bottom: var(--form-space-4);
    display: flex;
    gap: var(--form-space-3);
    border-left: 4px solid;
}

.modern-alert-info {
    background: #eff6ff;
    border-color: var(--form-primary);
    color: #1e40af;
}

.modern-alert-success {
    background: #f0fdf4;
    border-color: var(--form-success);
    color: #15803d;
}

.modern-alert-warning {
    background: #fffbeb;
    border-color: var(--form-warning);
    color: #b45309;
}

.modern-alert-error {
    background: #fef2f2;
    border-color: var(--form-error);
    color: #b91c1c;
}

/* =====================================================================
   INPUT GROUPS (campos con íconos)
   ===================================================================== */

.modern-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.modern-input-group-icon {
    position: absolute;
    left: 0.875rem;
    color: var(--form-gray-400);
    pointer-events: none;
    font-size: 1.125rem;
}

.modern-input-group .modern-input {
    padding-left: 2.5rem;
}

.modern-input-group-append {
    position: absolute;
    right: 0.875rem;
    color: var(--form-gray-500);
    font-size: 0.875rem;
}

/* =====================================================================
   AUTOCOMPLETE MEJORADO
   ===================================================================== */

.modern-autocomplete {
    position: relative;
}

.modern-autocomplete-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 100;
    background: white;
    border: 1.5px solid var(--form-gray-300);
    border-top: none;
    border-radius: 0 0 var(--form-radius-sm) var(--form-radius-sm);
    box-shadow: var(--form-shadow-lg);
    max-height: 300px;
    overflow-y: auto;
    margin-top: -1px;
    display: none;
}

.modern-autocomplete-results.active {
    display: block;
}

.modern-autocomplete-item {
    padding: var(--form-space-3) var(--form-space-4);
    cursor: pointer;
    transition: var(--form-transition);
    border-left: 3px solid transparent;
}

.modern-autocomplete-item:hover,
.modern-autocomplete-item.selected {
    background: var(--form-gray-50);
    border-left-color: var(--form-primary);
}

.modern-autocomplete-item-title {
    font-weight: 600;
    color: var(--form-gray-900);
    margin-bottom: var(--form-space-1);
}

.modern-autocomplete-item-subtitle {
    font-size: 0.8125rem;
    color: var(--form-gray-500);
    display: flex;
    gap: var(--form-space-3);
}

.modern-autocomplete-empty {
    padding: var(--form-space-4);
    text-align: center;
    color: var(--form-gray-500);
    font-size: 0.875rem;
}

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

@media (max-width: 768px) {
    .modern-form-grid {
        grid-template-columns: 1fr;
    }

    .modern-form-container {
        padding: var(--form-space-4);
    }

    .modern-form-section {
        padding: var(--form-space-4);
    }

    .modern-form-actions {
        flex-direction: column;
    }

    .modern-btn {
        width: 100%;
        justify-content: center;
    }
}

/* =====================================================================
   ANIMACIONES SUTILES
   ===================================================================== */

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

.modern-form-container {
    animation: fadeIn 0.3s ease-out;
}

.modern-input:focus,
.modern-select:focus,
.modern-textarea:focus {
    animation: none;
}

/* =====================================================================
   UTILIDADES
   ===================================================================== */

.text-required {
    color: var(--form-error);
    margin-left: var(--form-space-1);
}

.form-divider {
    height: 1px;
    background: var(--form-gray-200);
    margin: var(--form-space-6) 0;
}

.form-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--form-gray-300);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: help;
    margin-left: var(--form-space-1);
}