html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

/* Modo claro: predeterminado */
.light {
    background-color: white;
    color: black;
}

/* Modo oscuro */
.dark {
    background-color: #121212;
    color: white;
}

    .dark body {
        background-color: #121212;
        color: white;
    }

    .dark header,
    .dark footer,
    .dark main,
    .dark nav {
        background-color: #121212;
        color: white;
    }

    .dark a {
        color: #90caf9;
    }

    .dark input,
    .dark textarea,
    .dark select {
        background-color: #252525;
        color: white;
        border-color: #555;
    }

    
 
/* ================================
   BARRA DE NAVEGACIÓN - BIBLIOTECA
   ================================ */

.reading-navbar {
    --nav-bg: #faf8f3;
    --nav-text: #39382f;
    --nav-muted: #777367;
    --nav-accent: #65765b;
    --nav-border: #e8e3d9;

    min-height: 76px;
    padding: 0;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 3px 12px rgba(40, 35, 25, 0.035);
    position: relative;
    z-index: 100;
}

html.dark .reading-navbar {
    --nav-bg: #20231f;
    --nav-text: #e9e5da;
    --nav-muted: #b5b2a7;
    --nav-accent: #b1c29e;
    --nav-border: #373b34;

    color-scheme: dark;
}

.reading-navbar-container {
    min-height: 76px;
    padding-left: 32px;
    padding-right: 32px;
}

/* Marca */

.reading-brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    margin-right: 38px;
    color: var(--nav-text) !important;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.reading-brand:hover {
    opacity: 0.78;
}

.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--nav-accent);
    border-radius: 6px 6px 6px 2px;
    color: var(--nav-accent);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 23px;
    line-height: 1;
}

.brand-name {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* Enlaces */

.reading-navbar .navbar-collapse {
    align-items: center;
}

.reading-nav {
    gap: 8px;
}

.reading-navbar .reading-link {
    position: relative;
    padding: 12px 15px !important;
    color: var(--nav-muted) !important;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.reading-link::after {
    content: "";
    position: absolute;
    left: 15px;
    right: 15px;
    bottom: 5px;
    height: 2px;
    background: var(--nav-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.22s ease;
}

.reading-link:hover {
    color: var(--nav-text) !important;
}

.reading-link:hover::after {
    transform: scaleX(1);
}

/* Cerrar sesión, siempre a la derecha */

.reading-account {
    margin-left: auto;
}

.reading-navbar .logout-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 10px 15px !important;
    border: 1px solid var(--nav-border);
    border-radius: 7px;
    color: var(--nav-text) !important;
    font-size: 13px;
    font-weight: 500;
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

.logout-icon {
    font-size: 17px;
    line-height: 1;
    transition: transform 0.2s ease;
}

.reading-navbar .logout-link:hover {
    background: var(--nav-accent);
    border-color: var(--nav-accent);
    color: #fff !important;
    transform: translateY(-1px);
}

.reading-navbar .logout-link:hover .logout-icon {
    transform: translate(2px, -2px);
}

html.dark .reading-navbar .logout-link:hover {
    color: #20231f !important;
}

/* Botón del menú móvil */

.reading-toggler {
    border-color: var(--nav-border);
    padding: 7px 10px;
}

.reading-toggler:focus {
    box-shadow: 0 0 0 3px rgba(101, 118, 91, 0.18);
}

/* Accesibilidad: teclado */

.reading-navbar a:focus-visible,
.reading-toggler:focus-visible {
    outline: 2px solid var(--nav-accent);
    outline-offset: 4px;
}

/* Adaptación a pantallas pequeñas */

@media (max-width: 575.98px) {
    .reading-navbar-container {
        padding-left: 18px;
        padding-right: 18px;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .reading-brand {
        margin-right: 0;
    }

    .brand-name {
        font-size: 20px;
    }

    .reading-navbar .navbar-collapse {
        padding-top: 12px;
    }

    .reading-navbar .reading-link {
        padding-left: 0 !important;
    }

    .reading-link::after {
        left: 0;
        right: auto;
        width: 100px;
    }

    .reading-account {
        margin-left: 0;
        margin-top: 8px;
        align-items: flex-start;
    }
}