/* ============================================================
   Global Layout, Navigation & Shared Components
   ============================================================ */

:root {
    /* === Colors === */
    --color-bg-main: #1f2937;
    --color-bg-alt: #111827;
    --color-surface: #1e293b;
    --color-border: #374151;
    --color-border-accent: #3b82f6;
    --color-text-main: #d1d5db;
    --color-text-muted: #9ca3af;
    --color-text-link: #93c5fd;
    --color-text-hover: #60a5fa;
    --color-danger: #ef4444;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-purple: #8b5cf6;

    /* === Layout === */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.5rem;

    /* === Typography === */
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;

    /* === Animation === */
    --transition-fast: 0.1s ease;
    --transition-med: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* Universal box model normalization */
*,
*::before,
*::after {
    box-sizing: inherit;
}

html,
body {
    width: 100%;
    max-width: 100%;
    overflow-x: clip !important;
    box-sizing: border-box;
    background: var(--color-bg-main);
    color: var(--color-text-main);
    font-size: var(--font-size-base);
    line-height: 1.5;
    padding-top: 2.5rem;
}

#flash-message,
header,
footer,
main {
    max-width: 100vw;
    overflow-x: clip;
}

/* --- Header --- */
#site-header {
    background-color: var(--color-bg-main);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-lg);
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#site-header .header-inner {
    width: 100%;
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#site-header .logo {
    color: #fff;
    font-weight: 700;
    font-size: var(--font-size-xl);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: color var(--transition-med);
}

#site-header .logo:hover {
    color: var(--color-text-hover);
}

#site-header .user-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

#site-header .user-info {
    color: var(--color-text-main);
    font-size: var(--font-size-sm);
}

#site-header .nav-link {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--transition-med);
}

#site-header .nav-link:hover {
    color: var(--color-text-hover);
}

#site-header .logout:hover {
    color: var(--color-danger);
}




/* --- Toolbar --- */
#toolbar {
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: 0.8rem var(--space-lg);
    margin-bottom: var(--space-xl);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

#toolbar .toolbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

#toolbar .btn-back,
#toolbar .btn-toggle {
    background: var(--color-border);
    color: var(--color-text-main);
    padding: 0.45rem 0.9rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background var(--transition-med), transform var(--transition-fast);
}

#toolbar .btn-back:hover,
#toolbar .btn-toggle:hover {
    background: var(--color-border-accent);
    transform: translateY(-1px);
}

/* --- Navigation Drawer --- */
.nav-drawer {
    transform: translateY(-100%);
    transition: transform var(--transition-slow);
    overflow: hidden;
    z-index: 1000;
}

.nav-drawer.open {
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    #toolbar {
        padding: 0.6rem 1rem;
        margin-bottom: 1rem;
    }

    #toolbar .toolbar-inner {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
}

/* ============================================================
   Error Pages
   ============================================================ */
.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    text-align: center;
    animation: fadeIn 0.6s ease-out;
}

.error-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.error-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-main);
    max-width: 600px;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.error-quote {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: 0.75rem;
}

.error-button {
    background-color: var(--color-border-accent);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-med);
}

.error-button:hover {
    background-color: var(--color-text-hover);
}

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

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

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

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

@keyframes fadeOutUp {
    from {
        opacity: 1;
        transform: translateY(0);
    }

    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

.animate-fadeInDown {
    animation: fadeInDown 0.4s ease-out forwards;
}

.animate-fadeOutUp {
    animation: fadeOutUp 0.6s ease-in forwards;
}

button:focus-visible {
    outline: 2px solid var(--color-border-accent);
    outline-offset: 2px;
}

#dev-banner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #b91c1c;
    /* deep red */
    color: #fff;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.6rem 0;
    z-index: 10000;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.link-domain {
    display: none;
    font-size: 0.75rem;
    color: #9ca3af;
    /* gray-400 */
}

a:hover+.link-domain {
    display: inline;
}

/* ============================================================
   Navbar Enhancements – Branding & User Menu
   ============================================================ */

.navbar-brand {
    font-size: 2.00rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--color-text-link);
    /* transition: color var(--transition-med); */
        transition: color 0.3s ease;
}

.navbar-brand:hover {
    /* color: var(--color-text-hover); */
        color: var(--accent-hover, var(--color-text-hover));
}

#navbar .nav-link {
    color: var(--color-text-muted);
    font-size: 1rem;
    /* increased from 0.875rem */
    letter-spacing: 0.01em;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-med);
}

/* ============================================================
   NAVBAR HOVER + ACTIVE STATES
   ============================================================ */

#navbar a.nav-link {
    position: relative;
    color: var(--color-text-muted);
    transition: color 0.2s ease, transform 0.15s ease;
    font-weight: 500;
}

#navbar a.nav-link:hover {
    color: var(--color-text-hover);
    transform: translateY(-1px);
}

/* Underline animation on hover */
#navbar a.nav-link::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-border-accent);
    transition: width 0.25s ease;
    border-radius: 2px;
}

#navbar a.nav-link:hover::after {
    width: 100%;
}

/* Active page highlight */
#navbar a.nav-link.active {
    color: var(--color-text-hover);
    font-weight: 600;
}

#navbar a.nav-link.active::after {
    width: 100%;
    background-color: var(--color-border-accent);
}

#navbar .logo {
    color: #fff;
    font-weight: 700;
    font-size: 1.5rem;
    text-decoration: none;
    transition: color 0.25s ease;
}

#navbar .logo:hover {
    color: var(--color-border-accent);
}

/* --- User Menu --- */
.user-menu-wrapper {
    position: relative;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--color-text-main);
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
    transition: color var(--transition-med);
}

.user-menu:hover {
    color: var(--color-text-hover);
}

.user-menu .chevron {
    transition: transform 0.2s ease;
}

.user-menu[aria-expanded="true"] .chevron {
    transform: rotate(180deg);
}

/* --- Dropdown Panel --- */
.user-dropdown {
    position: absolute;
    right: 0;
    top: 120%;
    width: 10rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    padding: 0.25rem 0;
    z-index: 50;
}

.user-dropdown a {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: var(--font-size-sm);
    color: var(--color-text-main);
    text-decoration: none;
    transition: background var(--transition-med);
}

.user-dropdown a:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-text-hover);
}

.user-dropdown .logout {
    color: var(--color-danger);
}

.user-dropdown .divider {
    border-top: 1px solid var(--color-border);
    margin: 0.25rem 0;
}

/* ============================================================
   Navbar Accent Color Mapping
   ============================================================ */

:root {
    --accent-library: #60a5fa;
    /* blue */
    --accent-collections: #fbbf24;
    /* amber */
    --accent-import: #a78bfa;
    /* purple */
}


.favorite-toggle {
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    font-size: 1rem;
    margin-left: 0.4rem;
    transition: color 0.2s ease;
}

.favorite-toggle:hover {
    color: #fbbf24;
}

.favorite-toggle.active {
    color: #fbbf24;
    /* amber */
    text-shadow: 0 0 6px rgba(251, 191, 36, 0.5);
}

/* ============================================================
   Shared Error Page Styling
   ============================================================ */

.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    text-align: center;
    animation: fadeIn 0.6s ease-out;
}

.error-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.error-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-main);
    max-width: 600px;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.error-quote {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: 0.75rem;
    max-width: 600px;
}

.error-button {
    background-color: var(--color-border-accent);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-med);
}

.error-button:hover {
    background-color: var(--color-text-hover);
}

.favorite-toggle[aria-pressed="true"] {
    color: #facc15;
}

.favorite-toggle[aria-pressed="false"] {
    color: #64748b;
}