/* ============================================================
   Fight Club - Estilos tipo Twitter
   Usa variables CSS para poder cambiar de tema (claro/oscuro).
   ============================================================ */

/* ---------- Tema oscuro (por defecto): negro con detalles rojos ---------- */
:root,
[data-theme="dark"] {
    --bg: #000000;
    --bg-elevated: #16181a;
    --bg-hover: #1f1f1f;
    --border: #2a2a2a;
    --text: #f7f9f9;
    --text-muted: #8a8a8a;
    --accent: #e0245e;
    --accent-hover: #b91c47;
    --accent-text: #ffffff;
    --danger: #ff4d4d;
    --shadow: rgba(0, 0, 0, 0.6);
}

/* ---------- Tema claro (blanco con detalles rojos) ---------- */
[data-theme="light"] {
    --bg: #ffffff;
    --bg-elevated: #f7f7f7;
    --bg-hover: #efefef;
    --border: #e2e2e2;
    --text: #0f1419;
    --text-muted: #536471;
    --accent: #e0245e;
    --accent-hover: #b91c47;
    --accent-text: #ffffff;
    --danger: #d40000;
    --shadow: rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* ---------- Encabezado / barra superior ---------- */
header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 1.25rem;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(6px);
}

header h1 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent);
}

/* ---------- Navegación ---------- */
nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

nav a {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 0.9rem;
    border-radius: 9999px;
    transition: background-color 0.15s ease;
}

nav a:hover {
    background-color: var(--bg-hover);
}

/* ---------- Botón para cambiar de tema ---------- */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    width: 40px;
    height: 40px;
    border-radius: 9999px;
    cursor: pointer;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s ease;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background-color: var(--bg-hover);
}

/* ---------- Contenedor principal (columna central) ---------- */
main {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem;
}

/* ---------- Secciones / tarjetas ---------- */
section {
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

h3 {
    font-size: 1rem;
    margin-bottom: 0.4rem;
}

/* ---------- Formularios ---------- */
form {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

input,
textarea {
    width: 100%;
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: 9999px;
    color: var(--text);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    margin-top: 0.35rem;
    transition: border-color 0.15s ease;
}

textarea {
    border-radius: 16px;
    resize: vertical;
    min-height: 100px;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Quitamos los <br> visualmente heredados dejando espacio con gap */
form br {
    display: none;
}

/* ---------- Botones ---------- */
button {
    background-color: var(--accent);
    color: var(--accent-text);
    border: none;
    border-radius: 9999px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 1rem;
    transition: background-color 0.15s ease;
}

button:hover {
    background-color: var(--accent-hover);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ---------- Enlaces de acción ---------- */
main > a {
    display: inline-block;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
}

main > a:hover {
    text-decoration: underline;
}

/* ---------- Publicaciones (feed tipo tweet) ---------- */
article {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    transition: background-color 0.15s ease;
}

article:hover {
    background-color: var(--bg-hover);
}

article p {
    color: var(--text);
    margin-top: 0.25rem;
}

.post-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ---------- Separadores ---------- */
hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0;
}

/* ---------- Perfil ---------- */
.perfil-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.perfil-header img,
img[alt="Foto de perfil"] {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--bg-hover);
    border: 1px solid var(--border);
}

/* ---------- Mensajes de estado (errores / avisos JS) ---------- */
.mensaje {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.9rem;
    display: none;
}

.mensaje.visible {
    display: block;
}

.mensaje.error {
    background-color: rgba(244, 33, 46, 0.12);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.mensaje.ok {
    background-color: rgba(29, 155, 240, 0.12);
    color: var(--accent);
    border: 1px solid var(--accent);
}

/* ---------- Subida de archivos (foto / video / audio) ---------- */
.media-botones {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.media-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background-color: var(--bg);
    color: var(--accent);
    border: 1px solid var(--border);
    border-radius: 9999px;
    padding: 0.5rem 0.9rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    margin: 0;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.media-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent);
}

/* Los <input type="file"> reales se ocultan; se activan con las etiquetas. */
.media-input {
    display: none;
}

/* Vista previa de los archivos seleccionados */
.media-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.media-preview:empty {
    margin-top: 0;
}

/* Cada archivo en la vista previa, con su botón de borrar encima. */
.media-item {
    position: relative;
    display: inline-flex;
}

.media-item img,
.media-item video {
    max-width: 100%;
    max-height: 220px;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: block;
}

.media-item audio {
    width: 260px;
    max-width: 100%;
}

/* Botón cruz (✕) para quitar el archivo. */
.media-remove {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 28px;
    height: 28px;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.75);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s ease;
}

.media-remove:hover {
    background-color: var(--accent);
}

.media-chip {
    font-size: 0.8rem;
    color: var(--text-muted);
    background-color: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: 9999px;
    padding: 0.3rem 0.7rem;
}

/* ---------- Medios dentro de las publicaciones ---------- */
.post-media {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.post-media img,
.post-media video {
    max-width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.post-media audio {
    width: 100%;
}

/* ============================================================
   Responsivo
   ============================================================ */
@media (max-width: 640px) {
    header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    nav {
        justify-content: center;
    }

    main {
        padding: 0.75rem;
    }

    form {
        padding: 1rem;
    }
}