/* ============================================
   DIARIO DIGITAL - ESTILOS PRINCIPALES
   Diseño mobile first: base = mobile, luego media queries para tablet y desktop
   Colores: #1a1a2e (oscuro), #e94560 (rojo/acento)
   Tipografía: 'Georgia' para títulos, 'Segoe UI' para textos
   ============================================ */

/* ---------- Reset y variables ---------- */
:root {
    --color-oscuro: #1a1a2e;
    --color-oscuro-2: #16213e;
    --color-acento: #e94560;
    --color-fondo: #f5f5f5;
    --color-texto: #333;
    --color-texto-suave: #888;
    --color-blanco: #ffffff;
    --sombra: 0 4px 20px rgba(0, 0, 0, 0.1);
    --radio: 12px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-family: 'Georgia', 'Times New Roman', serif;
}

img {
    max-width: 100%;
    display: block;
}

/* ---------- Encabezado ---------- */
.header {
    background: linear-gradient(135deg, var(--color-oscuro) 0%, var(--color-oscuro-2) 100%);
    color: var(--color-blanco);
    padding: 25px 16px;
    text-align: center;
    border-bottom: 5px solid var(--color-acento);
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.header p {
    font-size: 1rem;
    opacity: 0.8;
    font-style: italic;
}

/* ---------- Contenedor principal ---------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
}

/* ---------- Grid de noticias (1 columna en mobile) ---------- */
.noticias-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 20px;
}

/* ---------- Tarjeta de noticia ---------- */
.noticia-card {
    background: var(--color-blanco);
    border-radius: var(--radio);
    overflow: hidden;
    box-shadow: var(--sombra);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.noticia-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Noticia destacada */
.noticia-card.destacado {
    border: 2px solid var(--color-acento);
}

.noticia-imagen {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #e9ecef;
}

.noticia-contenido {
    padding: 16px;
}

.noticia-categoria {
    display: inline-block;
    background: var(--color-acento);
    color: var(--color-blanco);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.noticia-badge-destacado {
    display: inline-block;
    background: #ffc107;
    color: var(--color-oscuro);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    margin-left: 6px;
}

.noticia-titulo {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-oscuro);
}

.noticia-subtitulo {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 12px;
    font-style: italic;
}

.noticia-metadata {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--color-texto-suave);
    border-top: 1px solid #eee;
    padding-top: 12px;
}

.noticia-autor {
    font-weight: 600;
    color: var(--color-acento);
}

.noticia-fecha {
    font-style: italic;
}

/* ---------- Estados: carga, error, vacío ---------- */
.loading {
    text-align: center;
    padding: 40px 16px;
    font-size: 1.1rem;
    color: var(--color-texto-suave);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
}

.error {
    text-align: center;
    padding: 40px 16px;
    color: #dc3545;
    font-size: 1rem;
}

.sin-noticias {
    text-align: center;
    padding: 40px 16px;
    color: var(--color-texto-suave);
    font-size: 1.1rem;
}

/* ============================================
   PANEL DE ADMINISTRACIÓN
   ============================================ */

/* ---------- Tarjetas de autenticación (login/registro) ---------- */
.auth-panel {
    max-width: 420px;
    margin: 40px auto;
    background: var(--color-blanco);
    border-radius: var(--radio);
    padding: 28px 20px;
    box-shadow: var(--sombra);
}

.auth-panel h2 {
    color: var(--color-oscuro);
    margin-bottom: 8px;
    text-align: center;
}

.auth-panel .auth-subtitulo {
    color: var(--color-texto-suave);
    text-align: center;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.auth-switch {
    text-align: center;
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--color-texto-suave);
}

.auth-switch a {
    color: var(--color-acento);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* ---------- Formularios ---------- */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-texto);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 0.95rem;
    background: var(--color-blanco);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-acento);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.form-group .campo-error {
    color: #dc3545;
    font-size: 0.8rem;
    margin-top: 4px;
    display: none;
}

.form-group.invalido .campo-error {
    display: block;
}

.form-group.invalido input,
.form-group.invalido select {
    border-color: #dc3545;
}

.form-group.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group.checkbox input {
    width: auto;
}

.form-group.checkbox label {
    margin-bottom: 0;
}

/* ---------- Botones ---------- */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    opacity: 0.85;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primario {
    background: var(--color-acento);
    color: var(--color-blanco);
}

.btn-secundario {
    background: #e9ecef;
    color: var(--color-texto);
}

.btn-peligro {
    background: #dc3545;
    color: var(--color-blanco);
}

.btn-block {
    width: 100%;
}

/* ---------- Mensajes ---------- */
.mensaje {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    display: none;
}

.mensaje.visible {
    display: block;
}

.mensaje-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.mensaje-exito {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* ---------- Barra de acciones del admin ---------- */
.admin-toolbar {
    display: flex;
    flex-direction: column;
    gap: 12px;
    justify-content: space-between;
    align-items: flex-start;
    margin-top: 24px;
    margin-bottom: 16px;
    background: var(--color-blanco);
    border-radius: var(--radio);
    padding: 16px;
    box-shadow: var(--sombra);
}

.admin-toolbar h2 {
    color: var(--color-oscuro);
    font-size: 1.3rem;
}

.admin-usuario {
    color: var(--color-texto-suave);
    font-size: 0.9rem;
}

.admin-usuario strong {
    color: var(--color-acento);
}

.admin-toolbar .acciones {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

/* ---------- Formulario de noticia ---------- */
.form-noticia {
    background: var(--color-blanco);
    border-radius: var(--radio);
    padding: 24px 20px;
    box-shadow: var(--sombra);
    margin-bottom: 24px;
}

.form-noticia h3 {
    color: var(--color-oscuro);
    margin-bottom: 16px;
}

.form-acciones {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

/* ---------- Tabla de noticias ---------- */
.tabla-wrap {
    background: var(--color-blanco);
    border-radius: var(--radio);
    box-shadow: var(--sombra);
    overflow-x: auto;
}

.tabla-noticias {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.tabla-noticias th,
.tabla-noticias td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.tabla-noticias th {
    background: var(--color-oscuro);
    color: var(--color-blanco);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.tabla-noticias tr:hover {
    background: #f8f9fa;
}

.tabla-noticias td.celda-titulo {
    font-weight: 600;
}

.acciones-boton {
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    margin-right: 5px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.btn-editar {
    background: #ffc107;
    color: var(--color-texto);
}

.btn-eliminar {
    background: #dc3545;
    color: var(--color-blanco);
}

/* ============================================
   RESPONSIVE - TABLET (≥ 768px)
   ============================================ */
@media (min-width: 768px) {
    .header {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 2.4rem;
    }

    .container {
        padding: 24px;
    }

    .noticias-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .admin-toolbar {
        flex-direction: row;
        align-items: center;
    }

    .auth-panel {
        padding: 40px;
    }

    .form-noticia {
        padding: 30px;
    }
}

/* ============================================
   RESPONSIVE - DESKTOP (≥ 1024px)
   ============================================ */
@media (min-width: 1024px) {
    .header h1 {
        font-size: 3rem;
    }

    .noticias-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .noticia-imagen {
        height: 220px;
    }

    .form-noticia {
        padding: 36px;
    }
}