/* ==========================================================================
   Design System & Theme Tokens
   ========================================================================== */

:root {
    color-scheme: light dark;
    --bg-body: #ffffff;
    --text-body: #212529;
    --text-muted: #6c757d;
    --bg-card: #f8f9fa;
    --border-card: #e9ecef;
    --bg-nav: #f8f9fa;
    --border-nav: #e9ecef;
    --text-nav: rgba(0, 0, 0, 0.6);
    --text-nav-active: #006ac3;
    --link-color: #006ac3;
    --link-hover: #004c8c;
    --btn-primary-bg: #006ac3;
    --btn-primary-hover: #0063b7;
    --code-bg: #f8f9fa;
    --quote-border: #dfe2e5;
    --quote-text: #6a737d;
}

[data-theme="light"] {
    color-scheme: only light;
    --bg-body: #ffffff;
    --text-body: #212529;
    --text-muted: #6c757d;
    --bg-card: #f8f9fa;
    --border-card: #e9ecef;
    --bg-nav: #f8f9fa;
    --border-nav: #e9ecef;
    --text-nav: rgba(0, 0, 0, 0.6);
    --text-nav-active: #006ac3;
    --link-color: #006ac3;
    --link-hover: #004c8c;
    --btn-primary-bg: #006ac3;
    --btn-primary-hover: #0063b7;
    --code-bg: #f8f9fa;
    --quote-border: #dfe2e5;
    --quote-text: #6a737d;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --bg-body: #121212;
        --text-body: #e0e0e0;
        --text-muted: #9e9e9e;
        --bg-card: #1e1e1e;
        --border-card: #2e2e2e;
        --bg-nav: #1e1e1e;
        --border-nav: #2e2e2e;
        --text-nav: #9e9e9e;
        --text-nav-active: #ffffff;
        --link-color: #006ac3;
        --link-hover: #0082f0;
        --btn-primary-bg: #006ac3;
        --btn-primary-hover: #00569e;
        --code-bg: #2d2d2d;
        --quote-border: #424242;
        --quote-text: #9e9e9e;
    }
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg-body: #121212;
    --text-body: #e0e0e0;
    --text-muted: #9e9e9e;
    --bg-card: #1e1e1e;
    --border-card: #2e2e2e;
    --bg-nav: #1e1e1e;
    --border-nav: #2e2e2e;
    --text-nav: #9e9e9e;
    --text-nav-active: #ffffff;
    --link-color: #006ac3;
    --link-hover: #0082f0;
    --btn-primary-bg: #006ac3;
    --btn-primary-hover: #00569e;
    --code-bg: #2d2d2d;
    --quote-border: #424242;
    --quote-text: #9e9e9e;
}

/* ==========================================================================
   Base Layout & Typography
   ========================================================================== */

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

body {
    font-size: 1.05rem;
    line-height: 1.65;
}

.site-header-container,
.site-main-container {
    max-width: 1440px;
    margin: 0 auto;
}

.site-header-container {
    padding-left: 15px !important;
    padding-right: 15px !important;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-main-container {
    padding-top: 1.5rem;
    padding-bottom: 5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header-logo {
    height: 2.75rem;
    width: auto;
    max-width: 100%;
    vertical-align: middle;
}

.navbar-light {
    background-color: var(--bg-nav) !important;
    border-bottom: 1px solid var(--border-nav);
}

.navbar-light .navbar-nav .nav-link {
    color: var(--text-nav);
    font-size: 1.05rem;
    font-weight: 500;
    white-space: nowrap;
}

.navbar-light .navbar-nav .nav-link:hover {
    color: var(--link-color);
}

.navbar-light .navbar-nav .nav-item.active .nav-link,
.navbar-light .navbar-nav .nav-link.active {
    color: var(--text-nav-active);
}

@media (max-width: 575.98px) {
    .site-header-container {
        padding-top: 0.4rem;
        padding-bottom: 0.4rem;
    }

    .header-logo {
        height: 2.15rem;
    }

    .navbar-light .navbar-nav .nav-link {
        font-size: 1rem;
    }
}

@media (max-width: 340px) {
    .header-logo {
        height: 1.85rem;
    }

    .navbar-light .navbar-nav .nav-link {
        font-size: 0.92rem;
    }
}

/* ==========================================================================
   Theme Toggle
   ========================================================================== */

#themeToggle {
    border: none;
    background: transparent;
    cursor: pointer;
    line-height: 1;
    color: var(--text-nav);
    padding: 0;
}

#themeToggle:hover {
    color: var(--link-color);
}

.theme-icon-moon {
    display: inline-block;
}
.theme-icon-sun {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-icon-moon {
        display: none;
    }
    :root:not([data-theme="light"]) .theme-icon-sun {
        display: inline-block;
    }
}

[data-theme="dark"] .theme-icon-moon {
    display: none;
}
[data-theme="dark"] .theme-icon-sun {
    display: inline-block;
}

[data-theme="light"] .theme-icon-moon {
    display: inline-block;
}
[data-theme="light"] .theme-icon-sun {
    display: none;
}

/* ==========================================================================
   Content Elements & Components
   ========================================================================== */

a {
    color: var(--link-color);
}

a:hover {
    color: var(--link-hover);
}

.undecorated {
    color: var(--text-body);
}

.highlight {
    color: var(--btn-primary-bg);
}

.MathJax_Display {
    padding: 0 1em;
}

figure > figcaption {
    text-align: center;
}

blockquote {
    padding: 0 1em;
    color: var(--quote-text);
    border-left: 0.25em solid var(--quote-border);
}

details.ctf-explainer {
    margin: 1.25rem 0;
    border: 1px solid var(--border-card);
    border-radius: 6px;
    background-color: var(--bg-card);
    padding: 0.65rem 1rem;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

details.ctf-explainer summary {
    cursor: pointer;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--link-color);
    outline: none;
    user-select: none;
}

details.ctf-explainer summary:hover {
    color: var(--link-hover);
}

details.ctf-explainer[open] {
    padding-bottom: 0.85rem;
}

details.ctf-explainer[open] summary {
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-card);
}

details.ctf-explainer .ctf-explainer-content blockquote {
    margin-bottom: 0;
    padding-right: 0;
}

code {
    background-color: var(--code-bg);
    color: var(--text-body);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
}

.card {
    background-color: var(--bg-card);
    border-color: var(--border-card);
    color: var(--text-body);
}

.card-header {
    background-color: var(--bg-card);
    border-color: var(--border-card);
}

.card-deck > .card {
    min-width: 15rem;
    max-width: 20rem;
}

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

.btn-primary, 
.btn-primary:active, 
.btn-primary:visited {
    background-color: var(--btn-primary-bg) !important;
    border-color: var(--btn-primary-bg) !important;
}

.btn-primary:hover {
    background-color: var(--btn-primary-hover) !important;
    border-color: var(--btn-primary-hover) !important;
}