/* LibroSelva - Diseño Premium y Moderno */
:root {
    --bg-color: #0b0f19;
    --card-bg: rgba(22, 29, 45, 0.6);
    --accent-color: #10b981;
    --accent-hover: #059669;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.08);
    --nav-height: 70px;
}

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

body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(at 0% 0%, rgba(16, 185, 129, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.15) 0px, transparent 50%);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    min-height: 100vh;
}

/* Navegación */
nav {
    height: var(--nav-height);
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--accent-color), #3b82f6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-new {
    background: var(--accent-color);
    color: white !important;
    padding: 0.6rem 1.2rem !important;
}

.btn-new:hover {
    background: var(--accent-hover) !important;
}

/* El Contenedor de la Selva */
#main-app {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Tarjetas de Posts */
.post {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.5s ease-out forwards;
    position: relative;
    overflow: hidden;
}

.post.featured {
    background: rgba(251, 191, 36, 0.15);
    /* Oro suave */
    border: 2px solid #fbbf24;
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.2);
}

.post.featured::before {
    content: '⭐ DESTACADO';
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 0.7rem;
    font-weight: 800;
    color: #fbbf24;
    letter-spacing: 1px;
}

.post:hover {
    transform: translateY(-4px);
    border-color: rgba(16, 185, 129, 0.3);
}

.post-content {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 1.2rem;
}

.post-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.btn-action {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s;
}

.btn-action:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.3);
}

.btn-highlight:hover {
    background: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.3);
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Botón de Like */
.btn-like {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.btn-like:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.5);
}

.btn-like.active {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

/* Formulario de Nuevo Post */
.form-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem;
    color: white;
    font-family: inherit;
    font-size: 1.1rem;
    resize: none;
    margin-bottom: 1.5rem;
    outline: none;
}

textarea:focus {
    border-color: var(--accent-color);
}

button[type="submit"] {
    width: 100%;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

button[type="submit"]:hover {
    background: var(--accent-hover);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================
   📱 RESPONSIVE MOBILE FIRST
=========================== */

/* Pantallas pequeñas (móviles, hasta 600px) */
@media (max-width: 600px) {
    :root {
        --nav-height: 60px;
    }

    /* Navbar */
    nav {
        padding: 0 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .nav-links a {
        font-size: 0.85rem;
        padding: 0.45rem 0.75rem;
    }

    .btn-new {
        padding: 0.45rem 0.9rem !important;
    }

    /* Contenedor principal */
    #main-app {
        margin: 1rem auto;
        padding: 0 0.75rem;
    }

    /* Tarjetas */
    .post {
        padding: 1rem;
        border-radius: 12px;
        margin-bottom: 1rem;
    }

    /* No elevar en hover en móvil (no hay hover táctil) */
    .post:hover {
        transform: none;
    }

    .post.featured::before {
        font-size: 0.6rem;
        top: 8px;
        right: 8px;
    }

    .post-content {
        font-size: 1rem;
        margin-bottom: 0.8rem;
    }

    /* Acciones: wrap si no caben */
    .post-actions {
        flex-wrap: wrap;
        gap: 0.4rem;
        padding-top: 0.75rem;
        margin-top: 0.75rem;
    }

    .btn-action {
        font-size: 0.8rem;
        padding: 0.5rem 0.75rem;
        border-radius: 10px;
        /* Área táctil mínima de 44px */
        min-height: 38px;
    }

    .btn-like {
        padding: 0.5rem 0.75rem;
        min-height: 38px;
        font-size: 0.9rem;
    }

    /* Formulario */
    .form-container {
        padding: 1.2rem;
        border-radius: 16px;
    }

    textarea {
        font-size: 1rem;
        padding: 0.85rem;
        /* Evitar zoom automático en iOS */
        font-size: 16px;
    }

    button[type="submit"] {
        padding: 0.9rem;
        font-size: 1rem;
        /* Área táctil grande para pulgar */
        min-height: 50px;
    }
}

/* Pantallas muy pequeñas (hasta 380px — iPhone SE, etc.) */
@media (max-width: 380px) {
    .logo {
        font-size: 1.1rem;
    }

    .nav-links a:not(.btn-new) {
        display: none;
        /* Ocultar "Explorar" en pantallas muy pequeñas */
    }

    .post {
        padding: 0.85rem;
    }
}