:root {
    --header-height: 64px;
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
    --bg-light: #f1f5f9;
    --bg-dark: #0f172a;
    --card-light: #ffffff;
    --card-dark: #1e293b;
    --text-light: #0f172a;
    --text-dark: #f1f5f9;
    --muted-light: #64748b;
    --muted-dark: #94a3b8;
    --border-light: #e2e8f0;
    --border-dark: #334155;
    --primary: #005aaa;
}

html, body {
    height: 100%;
    height: 100dvh;
    margin: 0;
    background-color: var(--bg-light);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    transition: background-color 0.25s ease, color 0.25s ease;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
    overscroll-behavior: none;
}

    html.dark, html.dark body {
        background-color: var(--bg-dark);
        color: var(--text-dark);
    }

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    min-height: calc(var(--header-height) + var(--safe-area-top));
    height: auto;
    padding-top: var(--safe-area-top);
    z-index: 2000;
    background-color: var(--card-light);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: background-color 0.25s ease, border-color 0.25s ease;
}

html.dark header {
    background-color: var(--card-dark);
    border-bottom-color: var(--border-dark);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.navbar {
    min-height: var(--header-height);
    height: auto;
    padding: 0;
    flex-wrap: wrap;
}

header {
    overflow: visible !important;
}

    header.site-header,
    header {
        background-color: #ffffff !important;
        border-bottom: 1px solid #e2e8f0 !important;
    }

html.dark header {
    background-color: #1e293b !important;
    border-bottom-color: #334155 !important;
}

header .navbar-brand {
    font-weight: 600 !important;
    font-size: 1.15rem !important;
    color: #0f172a !important;
    text-decoration: none !important;
}

html.dark header .navbar-brand {
    color: #f1f5f9 !important;
}

header .nav-link-header {
    font-size: 0.9rem !important;
    font-weight: 500 !important;
    color: #64748b !important;
    text-decoration: none !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    line-height: 1.4 !important;
}

    header .nav-link-header:hover {
        color: #005aaa !important;
        background: rgba(0, 90, 170, 0.06) !important;
    }

html.dark header .nav-link-header {
    color: #94a3b8 !important;
}

    html.dark header .nav-link-header:hover {
        color: #7eb6e8 !important;
    }


#mobileNav {
    display: none !important;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    width: 100%;
    background: #ffffff !important;
    border-top: 1px solid #e2e8f0;
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.14);
    padding: 0.75rem 0;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
    z-index: 2010;
}

    #mobileNav.show {
        display: block !important;
    }

html.dark #mobileNav {
    background: #1e293b !important;
    border-top-color: #334155;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
}

#mobileNav .mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

    #mobileNav .mobile-nav-list li {
        margin: 0;
        padding: 0;
        display: block;
    }

#mobileNav a.mobile-nav-item {
    display: flex !important;
    align-items: center !important;
    width: 100%;
    min-height: 52px;
    padding: 0.85rem 1rem;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.35;
    color: #0f172a !important;
    text-decoration: none !important;
    border-radius: 12px;
    background: #f1f5f9 !important;
    border: 1px solid #e2e8f0;
    box-sizing: border-box;
}

    #mobileNav a.mobile-nav-item:active,
    #mobileNav a.mobile-nav-item:hover {
        background: #dbeafe !important;
        border-color: #93c5fd;
        color: #005aaa !important;
    }

html.dark #mobileNav a.mobile-nav-item {
    color: #f8fafc !important;
    background: #0f172a !important;
    border-color: #334155;
}

    html.dark #mobileNav a.mobile-nav-item:active,
    html.dark #mobileNav a.mobile-nav-item:hover {
        background: #1e3a5f !important;
        color: #93c5fd !important;
    }

#mobileNavBackdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    z-index: 1990;
}

    #mobileNavBackdrop.show {
        display: block !important;
    }

.nav-link-header {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.75rem !important;
    font-size: 0.9rem;
    font-weight: 500;
    color: #64748b !important;
    text-decoration: none;
    border-radius: 0.5rem;
    white-space: nowrap;
}

    .nav-link-header:hover {
        color: #005aaa !important;
        background: rgba(0, 90, 170, 0.06);
    }

html.dark .nav-link-header {
    color: #94a3b8 !important;
}

    html.dark .nav-link-header:hover {
        color: #7eb6e8 !important;
    }

.navbar-brand {
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--text-light) !important;
    gap: 0.6rem;
    padding: 0;
}

html.dark .navbar-brand {
    color: var(--text-dark) !important;
}

.logo-img {
    height: 38px;
    width: 38px;
    object-fit: cover;
    border-radius: 10px;
    transition: transform 0.2s ease;
}

.navbar-brand:hover .logo-img {
    transform: scale(1.05);
}

html.dark .logo-img {
    filter: invert(1) hue-rotate(180deg);
}

.nav-link {
    font-weight: 500;
    color: var(--muted-light) !important;
    padding: 0.55rem 0.9rem !important;
    border-radius: 10px;
    transition: all 0.2s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

    .nav-link:hover,
    .nav-link:active {
        color: var(--primary) !important;
        background-color: rgba(59, 130, 246, 0.1);
    }

html.dark .nav-link {
    color: var(--muted-dark) !important;
}

    html.dark .nav-link:hover,
    html.dark .nav-link:active {
        color: #93c5fd !important;
        background-color: rgba(59, 130, 246, 0.18);
    }

#theme-toggle-layout {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    border-radius: 12px;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    line-height: 1;
    color: var(--muted-light);
    background: transparent;
    border: none;
    transition: all 0.2s ease;
    flex-shrink: 0;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

    #theme-toggle-layout:hover,
    #theme-toggle-layout:active {
        background-color: rgba(0, 0, 0, 0.06);
        color: var(--text-light);
    }

html.dark #theme-toggle-layout {
    color: var(--muted-dark);
}

    html.dark #theme-toggle-layout:hover,
    html.dark #theme-toggle-layout:active {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--text-dark);
    }

.navbar-toggler {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    border: none;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    flex-shrink: 0;
}

    .navbar-toggler:focus {
        box-shadow: none;
    }

html.dark .navbar-toggler-icon {
    filter: invert(1);
}

.navbar .d-flex.align-items-center.ms-auto {
    flex-shrink: 0;
    gap: 0.25rem;
}

main {
    flex: 1;
    margin-top: calc(var(--header-height) + var(--safe-area-top));
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.25rem 0;
    padding-bottom: calc(1.25rem + var(--safe-area-bottom));
    -webkit-overflow-scrolling: touch;
    transition: margin-top 0.25s ease;
}

.container {
    max-width: 1200px;
    padding-left: max(1rem, var(--safe-area-left));
    padding-right: max(1rem, var(--safe-area-right));
}

html.dark .card {
    background-color: var(--card-dark);
    color: var(--text-dark);
    border-color: var(--border-dark);
}

html.dark .text-muted {
    color: var(--muted-dark) !important;
}

html.dark .bg-light {
    background-color: #1e293b !important;
    color: var(--text-dark) !important;
}

html.dark .text-dark {
    color: var(--text-dark) !important;
}

html.dark h1, html.dark h2, html.dark h3,
html.dark h4, html.dark h5, html.dark h6 {
    color: var(--text-dark);
}

html.dark .display-4 {
    color: #60a5fa !important;
}

html.dark .border-bottom {
    border-color: var(--border-dark) !important;
}

html.dark .shadow-sm {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4) !important;
}

@media (max-width: 767.98px) {
    :root {
        --header-height: 56px;
    }

    .navbar-brand span {
        font-size: 1.05rem;
    }

    .logo-img {
        height: 34px;
        width: 34px;
        border-radius: 9px;
    }

    main {
        padding-top: 1rem;
        padding-bottom: calc(1rem + var(--safe-area-bottom));
    }
}

@media (max-width: 380px) {
    .navbar-brand span {
        font-size: 0.95rem;
    }

    .logo-img {
        height: 30px;
        width: 30px;
    }
}

@media (max-height: 500px) and (orientation: landscape) {
    :root {
        --header-height: 48px;
    }

    .logo-img {
        height: 28px;
        width: 28px;
    }
}