/**
 * Sistema de Gestion de Diplomas - COLMED
 * Estilos Unificados v2.0
 * ISO 27001 Compliant
 *
 * Paleta de Colores Institucional:
 * - Primario: #1a5276 (Azul institucional)
 * - Secundario: #2874a6 (Azul medio)
 * - Acento: #148f77 (Verde institucional)
 * - Fondo: #f8f9fa
 */

/* ============================================
   VARIABLES CSS - PALETA INSTITUCIONAL
   ============================================ */
:root {
    /* Colores Primarios */
    --color-primario: #1a5276;
    --color-primario-hover: #154360;
    --color-primario-light: #2874a6;

    /* Colores Secundarios */
    --color-secundario: #2c3e50;
    --color-secundario-light: #34495e;

    /* Color Acento */
    --color-acento: #148f77;
    --color-acento-hover: #117a65;

    /* Colores de Estado */
    --color-exito: #1e8449;
    --color-exito-light: #d4efdf;
    --color-advertencia: #b7950b;
    --color-advertencia-light: #fcf3cf;
    --color-error: #922b21;
    --color-error-light: #fadbd8;
    --color-info: #1a5276;
    --color-info-light: #d4e6f1;

    /* Fondos */
    --color-fondo: #f8f9fa;
    --color-fondo-card: #ffffff;
    --color-borde: #dee2e6;

    /* Texto */
    --color-texto: #2c3e50;
    --color-texto-secundario: #6c757d;
    --color-texto-claro: #ffffff;

    /* Gradientes sutiles (solo donde necesario) */
    --gradiente-primario: linear-gradient(135deg, #1a5276 0%, #2874a6 100%);
    --gradiente-acento: linear-gradient(135deg, #148f77 0%, #1abc9c 100%);

    /* Sombras */
    --sombra-suave: 0 2px 10px rgba(0, 0, 0, 0.08);
    --sombra-media: 0 4px 15px rgba(0, 0, 0, 0.1);
    --sombra-elevada: 0 8px 25px rgba(0, 0, 0, 0.12);

    /* Transiciones */
    --transicion-rapida: 0.2s ease;
    --transicion-normal: 0.3s ease;

    /* Tipografia */
    --fuente-principal: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --fuente-monospace: 'Courier New', Consolas, monospace;

    /* Bordes */
    --radio-pequeño: 6px;
    --radio-medio: 10px;
    --radio-grande: 15px;
}

/* ============================================
   RESET Y BASE
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: var(--fuente-principal);
    background-color: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.6;
}

/* ============================================
   NAVBAR - BARRA DE NAVEGACION
   ============================================ */
.navbar-institucional {
    background: var(--gradiente-primario);
    box-shadow: var(--sombra-media);
}

.navbar-institucional .navbar-brand {
    font-weight: 600;
    letter-spacing: 0.5px;
}

.navbar-institucional .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: var(--transicion-rapida);
    padding: 0.5rem 1rem;
    border-radius: var(--radio-pequeño);
}

.navbar-institucional .nav-link:hover,
.navbar-institucional .nav-link.active {
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.1);
}

.navbar-institucional .dropdown-menu {
    border: none;
    box-shadow: var(--sombra-elevada);
    border-radius: var(--radio-medio);
}

/* ============================================
   CARDS - TARJETAS
   ============================================ */
.card {
    border: none;
    border-radius: var(--radio-grande);
    box-shadow: var(--sombra-suave);
    transition: var(--transicion-normal);
}

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

.card-header-institucional {
    background: var(--gradiente-primario);
    color: var(--color-texto-claro);
    border-radius: var(--radio-grande) var(--radio-grande) 0 0 !important;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.card-seleccion {
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transicion-normal);
}

.card-seleccion:hover {
    border-color: var(--color-primario-light);
    transform: translateY(-3px);
    box-shadow: var(--sombra-elevada);
}

.card-seleccion.selected {
    border-color: var(--color-primario);
    background: var(--color-info-light);
}

/* ============================================
   BOTONES
   ============================================ */
.btn-institucional {
    background: var(--gradiente-primario);
    border: none;
    color: var(--color-texto-claro);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radio-pequeño);
    font-weight: 500;
    transition: var(--transicion-rapida);
}

.btn-institucional:hover {
    background: var(--color-primario-hover);
    color: var(--color-texto-claro);
    transform: translateY(-1px);
    box-shadow: var(--sombra-suave);
}

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

.btn-acento {
    background: var(--gradiente-acento);
    border: none;
    color: var(--color-texto-claro);
}

.btn-acento:hover {
    background: var(--color-acento-hover);
    color: var(--color-texto-claro);
}

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

.btn-outline-institucional:hover {
    background: var(--color-primario);
    color: var(--color-texto-claro);
}

/* ============================================
   FORMULARIOS
   ============================================ */
.form-control:focus,
.form-select:focus {
    border-color: var(--color-primario-light);
    box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.15);
}

.input-group-text {
    background: var(--color-fondo);
    border-color: var(--color-borde);
}

/* ============================================
   ZONA DE UPLOAD
   ============================================ */
.upload-zone {
    border: 3px dashed var(--color-borde);
    border-radius: var(--radio-grande);
    padding: 50px 30px;
    text-align: center;
    transition: var(--transicion-normal);
    cursor: pointer;
    background: var(--color-fondo);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primario);
    background: var(--color-info-light);
}

.upload-zone .upload-icon {
    font-size: 4rem;
    color: var(--color-primario);
    margin-bottom: 15px;
}

/* ============================================
   INDICADOR DE PASOS
   ============================================ */
.steps-container {
    display: flex;
    justify-content: center;
    padding: 20px 0;
}

.steps-container .step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
}

.steps-container .step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #e0e0e0;
    color: #999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    transition: var(--transicion-normal);
    border: 3px solid transparent;
}

.steps-container .step.active .step-number {
    background: var(--gradiente-primario);
    color: var(--color-texto-claro);
    border-color: var(--color-primario-light);
    box-shadow: 0 4px 15px rgba(26, 82, 118, 0.3);
}

.steps-container .step.completed .step-number {
    background: var(--color-exito);
    color: var(--color-texto-claro);
    border-color: var(--color-exito);
}

.steps-container .step-label {
    margin-top: 10px;
    font-size: 0.85rem;
    color: #999;
    font-weight: 500;
    text-align: center;
    max-width: 100px;
    transition: var(--transicion-normal);
}

.steps-container .step.active .step-label {
    color: var(--color-primario);
    font-weight: 600;
}

.steps-container .step.completed .step-label {
    color: var(--color-exito);
}

.steps-container .step-line {
    width: 80px;
    height: 4px;
    background: #e0e0e0;
    margin: 0 15px;
    margin-top: 23px;
    border-radius: 2px;
    transition: var(--transicion-normal);
}

.steps-container .step-line.active {
    background: var(--gradiente-exito);
}

/* Alias para compatibilidad con steps-indicator */
.steps-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
}

.steps-indicator .step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #e0e0e0;
    color: #999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: var(--transicion-normal);
}

.steps-indicator .step.active {
    background: var(--gradiente-primario);
    color: var(--color-texto-claro);
}

.steps-indicator .step.completed {
    background: var(--color-exito);
    color: var(--color-texto-claro);
}

.steps-indicator .line {
    width: 60px;
    height: 3px;
    background: #e0e0e0;
    transition: var(--transicion-normal);
}

.steps-indicator .line.active {
    background: var(--color-exito);
}

/* ============================================
   ESTADISTICAS
   ============================================ */
.stats-box {
    padding: 20px;
    border-radius: var(--radio-medio);
    text-align: center;
    color: var(--color-texto-claro);
}

.stats-box .numero {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.stats-box .etiqueta {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 5px;
}

.stats-box.total {
    background: var(--gradiente-primario);
}

.stats-box.validos {
    background: var(--color-exito);
}

.stats-box.errores {
    background: var(--color-error);
}

.stats-box.advertencias {
    background: var(--color-advertencia);
}

/* ============================================
   TABLAS
   ============================================ */
.table-institucional thead th {
    background: var(--color-secundario);
    color: var(--color-texto-claro);
    font-weight: 600;
    border: none;
    position: sticky;
    top: 0;
    z-index: 10;
}

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

.table-preview {
    font-size: 0.9rem;
}

.table-preview th {
    background: var(--color-secundario);
    color: var(--color-texto-claro);
    font-weight: 600;
    position: sticky;
    top: 0;
}

/* ============================================
   BADGES Y ESTADOS
   ============================================ */
.badge-codigo {
    font-family: var(--fuente-monospace);
    font-size: 0.9rem;
    padding: 0.35em 0.65em;
    background: var(--color-secundario);
}

.badge-estado-valido {
    background: var(--color-exito) !important;
}

.badge-estado-error {
    background: var(--color-error) !important;
}

.badge-estado-advertencia {
    background: var(--color-advertencia) !important;
}

.badge-activo {
    background: var(--color-exito) !important;
}

.badge-inactivo {
    background: var(--color-error) !important;
}

/* ============================================
   CODIGO BASE
   ============================================ */
.codigo-base {
    font-family: var(--fuente-monospace);
    font-weight: bold;
    font-size: 1.1em;
    color: var(--color-primario);
    letter-spacing: 1px;
}

.codigo-preview {
    font-family: var(--fuente-monospace);
    font-size: 1.5em;
    letter-spacing: 2px;
    background: var(--gradiente-primario);
    color: var(--color-texto-claro);
    padding: 15px 25px;
    border-radius: var(--radio-medio);
    text-align: center;
    margin-bottom: 20px;
}

.codigo-preview .correlativo {
    color: #ffd700;
}

/* ============================================
   VALIDADOR PUBLICO
   ============================================ */
.validador-header {
    background: var(--gradiente-primario);
    padding: 40px 0;
    color: var(--color-texto-claro);
    text-align: center;
}

.validador-header h1 {
    font-weight: 700;
    margin-bottom: 10px;
}

.validador-form {
    background: var(--color-fondo-card);
    padding: 30px;
    border-radius: var(--radio-grande);
    box-shadow: var(--sombra-elevada);
    margin-top: -30px;
}

.resultado-valido {
    background: var(--color-exito-light);
    border-left: 5px solid var(--color-exito);
    padding: 25px;
    border-radius: var(--radio-medio);
}

.resultado-invalido {
    background: var(--color-error-light);
    border-left: 5px solid var(--color-error);
    padding: 25px;
    border-radius: var(--radio-medio);
}

/* ============================================
   LOGIN Y REGISTRO
   ============================================ */
.login-container {
width: 100%;
    max-width: 420px; 
}


.login-card {
    width: 100%;
    max-width: 420px;
    border-radius: var(--radio-grande);
    box-shadow: var(--sombra-elevada);
}

.login-header {
    background: var(--gradiente-primario);
    color: var(--color-texto-claro);
    padding: 30px;
    text-align: center;
    border-radius: var(--radio-grande) var(--radio-grande) 0 0;
}

.login-header .logo-icon {
    font-size: 3.5rem;
    margin-bottom: 15px;
}

/* ============================================
   ALERTAS PERSONALIZADAS
   ============================================ */
.alert-institucional {
    border: none;
    border-radius: var(--radio-medio);
    border-left: 4px solid;
}

.alert-institucional.alert-success {
    background: var(--color-exito-light);
    border-left-color: var(--color-exito);
    color: var(--color-exito);
}

.alert-institucional.alert-danger {
    background: var(--color-error-light);
    border-left-color: var(--color-error);
    color: var(--color-error);
}

.alert-institucional.alert-warning {
    background: var(--color-advertencia-light);
    border-left-color: var(--color-advertencia);
    color: var(--color-advertencia);
}

.alert-institucional.alert-info {
    background: var(--color-info-light);
    border-left-color: var(--color-info);
    color: var(--color-info);
}

/* ============================================
   MODAL
   ============================================ */
.modal-header-institucional {
    background: var(--gradiente-primario);
    color: var(--color-texto-claro);
}

.modal-content {
    border: none;
    border-radius: var(--radio-grande);
}

/* ============================================
   UTILIDADES
   ============================================ */
.text-institucional {
    color: var(--color-primario) !important;
}

.bg-institucional {
    background: var(--gradiente-primario) !important;
}

.border-institucional {
    border-color: var(--color-primario) !important;
}

.shadow-institucional {
    box-shadow: var(--sombra-media) !important;
}

/* Truncar texto */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Estado vacio */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-texto-secundario);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Contador de caracteres */
.char-count {
    font-size: 0.8em;
    color: var(--color-texto-secundario);
}

.char-count.valid {
    color: var(--color-exito);
}

.char-count.invalid {
    color: var(--color-error);
}

/* Formato de ayuda */
.formato-help {
    font-size: 0.85em;
    color: var(--color-texto-secundario);
}

.formato-help code {
    background: #e9ecef;
    padding: 2px 6px;
    border-radius: 3px;
}

/* Botones de accion pequenos */
.btn-action {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

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

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .stats-box .numero {
        font-size: 1.8rem;
    }

    .upload-zone {
        padding: 30px 20px;
    }

    .upload-zone .upload-icon {
        font-size: 3rem;
    }

    .codigo-preview {
        font-size: 1.2em;
        padding: 12px 15px;
    }

    .steps-indicator .line {
        width: 30px;
    }

    .validador-header {
        padding: 30px 15px;
    }
}

@media (max-width: 576px) {
    .navbar-institucional .navbar-brand {
        font-size: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .login-header {
        padding: 20px;
    }

    .login-header .logo-icon {
        font-size: 2.5rem;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .navbar, .btn, .no-print {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    body {
        background: white;
    }
}