:root {
    --bg-dark: #0f1419;
    --text-primary: #e7e9ea;
    --text-muted: #8b98a5;
    --accent: #1d9bf0;
    --accent-hover: #1a8cd8;
    --navbar-bg: rgba(26, 35, 50, 0.95);
    --navbar-border: rgba(61, 85, 104, 0.5);
    --card-bg: #1a2332;
    --card-border: rgba(61, 85, 104, 0.35);
    --cookie-banner-bg: #1a2332;
    --footer-border: rgba(61, 85, 104, 0.5);
}

[data-theme="light"] {
    --bg-dark: #eef2f5;
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
    --navbar-bg: rgba(255, 255, 255, 0.98);
    --navbar-border: rgba(203, 213, 225, 0.8);
    --card-bg: #ffffff;
    --card-border: rgba(203, 213, 225, 0.9);
    --cookie-banner-bg: #ffffff;
    --footer-border: rgba(203, 213, 225, 0.8);
}

/*
 * Default (dark UI) navbar: same interaction pattern as light theme — links and brand use
 * accent on hover/active instead of only Bootstrap's "brighter white".
 */
.propuz-navbar.navbar-dark {
    --bs-navbar-hover-color: var(--accent);
    --bs-navbar-brand-hover-color: var(--accent);
    --bs-navbar-active-color: var(--accent);
}

/*
 * Nav still uses Bootstrap's .navbar-dark (works on our dark bar). In light theme we must
 * override ALL of Bootstrap's "light text" variables; anything we omit (e.g. brand hover)
 * stays white from .navbar-dark — that is not intentional.
 */
[data-theme="light"] .navbar-dark {
    --bs-navbar-color: var(--text-primary);
    --bs-navbar-hover-color: var(--accent);
    --bs-navbar-active-color: var(--accent);
    --bs-navbar-disabled-color: rgba(30, 41, 59, 0.45);
    --bs-navbar-brand-color: var(--text-primary);
    --bs-navbar-brand-hover-color: var(--accent);
    --bs-navbar-toggler-border-color: rgba(30, 41, 59, 0.25);
    --bs-navbar-toggler-icon-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2833, 37, 41, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
}

body.home-page {
    background: linear-gradient(160deg, var(--bg-dark) 0%, var(--card-bg) 45%, var(--bg-dark) 100%);
}

.text-accent {
    color: var(--accent);
}

.propuz-navbar {
    background: var(--navbar-bg) !important;
    border-bottom: 1px solid var(--navbar-border);
    backdrop-filter: blur(8px);
    position: relative;
    z-index: 1030;
}

.propuz-navbar .nav-link {
    color: rgba(231, 233, 234, 0.9);
}

[data-theme="light"] .propuz-navbar .nav-link {
    color: rgba(30, 41, 59, 0.85);
}

.propuz-navbar .nav-link:hover,
.propuz-navbar .nav-link:focus {
    color: var(--bs-navbar-hover-color);
}

.propuz-navbar .nav-link.active {
    color: var(--accent) !important;
    font-weight: 600;
}

.propuz-navbar .navbar-brand:hover,
.propuz-navbar .navbar-brand:focus {
    color: var(--bs-navbar-brand-hover-color) !important;
}

.propuz-nav-all-puzzles {
    font-size: 0.8125rem;
    font-weight: 600;
    color: rgba(231, 233, 234, 0.72);
    text-decoration: none;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    white-space: nowrap;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.propuz-nav-all-puzzles:hover,
.propuz-nav-all-puzzles:focus-visible {
    color: var(--accent);
    border-color: rgba(29, 155, 240, 0.45);
    background: rgba(29, 155, 240, 0.1);
    outline: none;
}

[data-theme="light"] .propuz-nav-all-puzzles {
    color: rgba(30, 41, 59, 0.72);
    border-color: rgba(30, 41, 59, 0.18);
}

[data-theme="light"] .propuz-nav-all-puzzles:hover,
[data-theme="light"] .propuz-nav-all-puzzles:focus-visible {
    color: var(--accent);
    border-color: rgba(29, 155, 240, 0.35);
    background: rgba(29, 155, 240, 0.08);
}

.propuz-navbar .dropdown-menu.propuz-nav-dropdown {
    background: var(--card-bg);
    border: 1px solid var(--border-grid);
    border-radius: 12px;
    padding: 0.4rem;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
    min-width: 11rem;
    z-index: 1031;
}

[data-theme="light"] .propuz-navbar .dropdown-menu.propuz-nav-dropdown {
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

.propuz-navbar .dropdown-item {
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.45rem 0.75rem;
}

.propuz-navbar .dropdown-item:hover,
.propuz-navbar .dropdown-item:focus {
    color: var(--accent);
    background: rgba(29, 155, 240, 0.12);
}

.propuz-navbar .dropdown-item.active,
.propuz-navbar .dropdown-item:active {
    color: var(--accent);
    background: rgba(29, 155, 240, 0.16);
    font-weight: 600;
}

@media (max-width: 991.98px) {
    .propuz-navbar .dropdown-menu.propuz-nav-dropdown {
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0 0 0 0.75rem;
        margin-top: 0;
    }

    .propuz-navbar .dropdown-item {
        padding-left: 0.5rem;
    }
}

.navbar-theme-toggle {
    color: inherit;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: transparent;
}

[data-theme="light"] .navbar-theme-toggle {
    border-color: rgba(30, 41, 59, 0.2);
    color: var(--text-primary);
}

.navbar-theme-toggle .icon-sun {
    display: none;
}

.navbar-theme-toggle .icon-moon {
    display: inline;
}

[data-theme="light"] .navbar-theme-toggle .icon-sun {
    display: inline;
}

[data-theme="light"] .navbar-theme-toggle .icon-moon {
    display: none;
}

.propuz-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border) !important;
    color: var(--text-primary);
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        border-color 0.2s ease;
}

.propuz-card:hover,
.propuz-card:focus-within {
    transform: translateY(-4px);
    border-color: var(--accent) !important;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
}

.propuz-card:active {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
}

.propuz-card .text-accent i {
    display: inline-block;
    transition: transform 0.2s ease, color 0.2s ease;
}

.propuz-card:hover .text-accent i,
.propuz-card:focus-within .text-accent i {
    transform: scale(1.08);
}

[data-theme="light"] .propuz-card:hover,
[data-theme="light"] .propuz-card:focus-within {
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
}

@media (prefers-reduced-motion: reduce) {
    .propuz-card {
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .propuz-card:hover,
    .propuz-card:focus-within,
    .propuz-card:active {
        transform: none;
    }

    .propuz-card .text-accent i,
    .propuz-card:hover .text-accent i,
    .propuz-card:focus-within .text-accent i {
        transform: none;
    }
}

.propuz-card .card-text {
    color: var(--text-muted) !important;
}

.site-footer {
    background: var(--card-bg);
    border-color: var(--footer-border) !important;
    color: var(--text-muted);
}

.site-footer-heading {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.site-footer-list a {
    color: var(--text-muted);
    text-decoration: none;
}

.site-footer-list a:hover {
    color: var(--accent);
}

.propuz-cookie-banner {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1080;
    background: var(--cookie-banner-bg);
    border-top: 1px solid var(--footer-border);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
}

.propuz-cookie-banner .text-muted {
    color: var(--text-muted) !important;
}

/* Hub home (/) hero — puzzle tiles inside .home-hero-figure-frame (sudoku.css) */
.hub-hero-puzzles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
    width: 100%;
    max-width: 288px;
    margin: 0 auto;
}

.hub-hero-puzzle-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.85rem 0.45rem;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    background: var(--bg-cell, rgba(36, 52, 71, 0.55));
    border: 1px solid var(--border-grid, rgba(61, 85, 104, 0.45));
    transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.hub-hero-puzzle-tile:hover,
.hub-hero-puzzle-tile:focus-visible {
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
    transform: translateY(-1px);
    outline: none;
}

.hub-hero-puzzle-icon {
    font-size: 1.6rem;
    line-height: 1;
    color: var(--accent);
}

.hub-hero-puzzle-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-align: center;
    line-height: 1.25;
    color: inherit;
}

[data-theme="light"] .hub-hero-puzzle-tile:hover,
[data-theme="light"] .hub-hero-puzzle-tile:focus-visible {
    box-shadow: 0 6px 20px rgba(15, 23, 42, 0.1);
}

/* Unified footer: stacked puzzle strip + global strip (fragments :: propuzFooter) */
.propuz-footer-root > .site-footer {
    margin-top: 0;
}