/* ==========================================================================
   AirStack documentation theme
   Modern, professional skin on top of mkdocs-material.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */

:root {
    /* CMU official palette (brand.cmu.edu/visual-identity/colors)
       Core: Carnegie Red is the primary brand color and must dominate.
       Supporting reds: Skibo Red (Campus palette) as the dark step,
       Scots Rose (Tartan palette) as the bright step for dark mode. */
    --as-red:            #c41230;  /* Carnegie Red, PMS 187 C */
    --as-red-dark:       #941120;  /* Skibo Red, PMS 7623 C */
    --as-red-darker:     #6a0c17;  /* derived deep step (no official darker red) */
    --as-red-light:      #ef3a47;  /* Scots Rose, PMS Red 032 C */
    --as-red-tint:       rgba(196, 18, 48, 0.08);

    /* Core neutrals */
    --as-iron-gray:      #6d6e71;  /* Cool Gray 10 C — supporting text */
    --as-steel-gray:     #e0e0e0;  /* Cool Gray 4 C — borders, rules */
    --as-border:         var(--as-steel-gray);
    --as-text-secondary: var(--as-iron-gray);

    --md-primary-fg-color:        var(--as-red);
    --md-primary-fg-color--light: var(--as-red-light);
    --md-primary-fg-color--dark:  var(--as-red-dark);
    --md-accent-fg-color:         var(--as-red-dark);
    --md-accent-fg-color--transparent: var(--as-red-tint);

    /* Shape + motion */
    --as-radius:        0.6rem;
    --as-radius-sm:     0.35rem;
    --as-shadow-sm:     0 1px 2px rgba(15, 18, 25, 0.06), 0 1px 3px rgba(15, 18, 25, 0.08);
    --as-shadow-md:     0 4px 14px rgba(15, 18, 25, 0.10);
    --as-shadow-lg:     0 12px 32px rgba(15, 18, 25, 0.16);
    --as-transition:    180ms cubic-bezier(0.2, 0, 0, 1);
}

/* Links in dark mode need a brighter red for contrast */
[data-md-color-scheme="slate"] {
    --md-hue: 215;

    --md-primary-fg-color:        var(--as-red);
    --md-accent-fg-color:         var(--as-red-light);
    --md-accent-fg-color--transparent: rgba(239, 58, 71, 0.12);
    --md-typeset-a-color:         var(--as-red-light);

    /* Deeper, less washed-out dark background */
    --md-default-bg-color:        hsla(var(--md-hue), 22%, 10%, 1);
    --md-code-bg-color:           hsla(var(--md-hue), 20%, 14%, 1);
    --md-footer-bg-color:         hsla(var(--md-hue), 22%, 8%, 1);
    --md-footer-bg-color--dark:   hsla(var(--md-hue), 22%, 6%, 1);

    --as-shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.35);
    --as-shadow-md:  0 4px 14px rgba(0, 0, 0, 0.4);
    --as-shadow-lg:  0 12px 32px rgba(0, 0, 0, 0.5);

    /* Gray brand neutrals don't work on slate; fall back to theme grays */
    --as-border:         var(--md-default-fg-color--lightest);
    --as-text-secondary: var(--md-default-fg-color--light);
}

[data-md-color-scheme="default"] {
    --md-typeset-a-color: var(--as-red);
}

/* --------------------------------------------------------------------------
   2. Typography
   -------------------------------------------------------------------------- */

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
    font-weight: 700;
    letter-spacing: -0.015em;
}

.md-typeset h1 {
    color: var(--md-default-fg-color);
    margin-bottom: 1.2em;
}

.md-typeset h2 {
    margin-top: 2em;
}

/* Slightly larger, more readable body text */
.md-typeset {
    font-size: 0.78rem;
    line-height: 1.65;
}

/* --------------------------------------------------------------------------
   3. Header and navigation tabs
   -------------------------------------------------------------------------- */

.md-header {
    background: linear-gradient(120deg, var(--as-red) 0%, var(--as-red-dark) 100%);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset, var(--as-shadow-sm);
}

.md-tabs {
    position: relative;
    z-index: 3; /* keep tabs above splash content */
    background: linear-gradient(120deg, var(--as-red-dark) 0%, var(--as-red-darker) 100%);
}

.md-tabs__link {
    font-weight: 500;
    opacity: 0.75;
    transition: opacity var(--as-transition);
}

.md-tabs__link--active,
.md-tabs__link:hover {
    opacity: 1;
}

.md-tabs__item--active .md-tabs__link {
    position: relative;
}

.md-tabs__item--active .md-tabs__link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -0.4rem;
    height: 2px;
    border-radius: 2px;
    background: #fff;
}

.md-version * {
    position: relative;
    z-index: 5;
}

/* Search: keep the results dropdown above the tabs bar (z 3) and the
   version selector text (z 5), which share the header's stacking context.
   Material's .md-search__output is only z 1, so without this the dropdown
   renders behind them. .md-search is already position:relative upstream. */
.md-search {
    z-index: 6;
}

/* Search field: soft pill */
.md-search__form {
    border-radius: 0.45rem;
    background-color: rgba(255, 255, 255, 0.14);
    transition: background-color var(--as-transition);
}

.md-search__form:hover {
    background-color: rgba(255, 255, 255, 0.22);
}

/* --------------------------------------------------------------------------
   4. Sidebar navigation
   -------------------------------------------------------------------------- */

.md-nav__item .md-nav__link--active,
.md-nav__item .md-nav__link--active code {
    font-weight: 600;
}

.md-nav__link {
    transition: color var(--as-transition);
}

/* --------------------------------------------------------------------------
   5. Content elements: code, tables, admonitions, buttons, images
   -------------------------------------------------------------------------- */

/* Code blocks */
.md-typeset pre > code {
    border-radius: var(--as-radius-sm);
}

.md-typeset .highlight {
    border-radius: var(--as-radius-sm);
}

.md-typeset code {
    border-radius: 0.25rem;
    font-size: 0.85em;
}

/* Tables */
.md-typeset table:not([class]) {
    border-radius: var(--as-radius-sm);
    border: 1px solid var(--as-border);
    box-shadow: none;
    overflow: hidden;
    font-size: 0.72rem;
}

.md-typeset table:not([class]) th {
    background-color: var(--md-default-fg-color--lightest);
    color: var(--md-default-fg-color);
    font-weight: 600;
}

.md-typeset table:not([class]) tr:hover {
    background-color: var(--md-accent-fg-color--transparent);
    transition: background-color var(--as-transition);
}

/* Admonitions: flat modern style */
.md-typeset .admonition,
.md-typeset details {
    border-radius: var(--as-radius-sm);
    border-width: 0 0 0 3px;
    box-shadow: var(--as-shadow-sm);
    font-size: 0.72rem;
}

.md-typeset .admonition-title,
.md-typeset summary {
    border-radius: 0;
}

/* Buttons */
.md-typeset .md-button {
    border-radius: 2rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: transform var(--as-transition),
                box-shadow var(--as-transition),
                background-color var(--as-transition),
                border-color var(--as-transition),
                color var(--as-transition);
}

.md-typeset .md-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--as-shadow-md);
}

.md-typeset .md-button--primary {
    background-color: var(--as-red);
    border-color: var(--as-red);
    color: #fff;
}

.md-typeset .md-button--primary:hover {
    background-color: var(--as-red-dark);
    border-color: var(--as-red-dark);
}

/* Images and mermaid diagrams */
.md-typeset img {
    border-radius: var(--as-radius-sm);
}

/* Footer */
.md-footer-meta {
    font-size: 0.65rem;
}

/* Scrollbar (WebKit) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-thumb {
    background: var(--md-default-fg-color--lighter);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--md-default-fg-color--light);
}

/* Text selection */
::selection {
    background: var(--as-red-tint);
}

/* --------------------------------------------------------------------------
   6. Landing page: splash / hero
   -------------------------------------------------------------------------- */

.splash-container {
    position: relative;
    width: 100%;
    /* Grow with the hero content: a fixed height + overflow:hidden clipped
       the CTAs/footnote on short laptop viewports. */
    height: auto;
    min-height: calc(100vh - 98px);
    overflow: hidden;
    margin-top: 0;
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
}

.splash-container > .md-grid {
    flex: 1;
    display: flex;
    width: 100%;
    min-width: 0; /* flex items default to min-width:auto → pre overflows on phones */
}

.splash-background {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.media-overlay {
    position: absolute;
    inset: 0;
    /* Layered gradient: red brand tint + darkening + bottom fade into the page.
       Kept light so the demo video stays visible; the fade into the page bg
       only starts near the bottom edge. */
    background:
        linear-gradient(180deg, rgba(10, 12, 18, 0.30) 0%, rgba(10, 12, 18, 0.10) 45%, rgba(10, 12, 18, 0) 85%, var(--md-default-bg-color) 100%),
        linear-gradient(120deg, rgba(148, 17, 32, 0.18) 0%, rgba(15, 18, 25, 0.06) 60%);
    z-index: 2;
}

.media-container {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.splash-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.9);
}

/* Hero content */
.mdx-container {
    padding: 1rem;
    margin: 0 auto;
}

.mdx-hero {
    position: relative;
    z-index: 3;
    margin: 0;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding: 4rem 0 2.5rem;
    min-width: 0;
    width: 100%;
}

.mdx-hero__content {
    min-width: 0;
    max-width: 100%;
}

.mdx-hero__badge {
    display: inline-block;
    padding: 0.3rem 0.9rem;
    margin-bottom: 1.4rem;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 2rem;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.92);
}

.mdx-hero h1 {
    font-size: clamp(2.2rem, 5.5vw, 3.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    line-height: 1.1;
    color: #ffffff;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.55), 0 1px 3px rgba(0, 0, 0, 0.4);
}

.mdx-hero p {
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 400;
    margin: 0 auto 2.2rem;
    color: rgba(255, 255, 255, 0.92);
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.55);
    max-width: 36rem;
    line-height: 1.5;
}

.mdx-hero .md-button {
    margin: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.7em 2.2em;
    border-radius: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.45);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    transition: transform var(--as-transition),
                box-shadow var(--as-transition),
                background var(--as-transition),
                border-color var(--as-transition);
}

.mdx-hero .md-button:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: var(--as-shadow-lg);
    color: #fff;
}

.mdx-hero .md-button--primary {
    background: var(--as-red);
    border-color: var(--as-red);
    color: #fff;
    box-shadow: 0 6px 24px rgba(196, 18, 48, 0.45);
}

.mdx-hero .md-button--primary:hover {
    background: var(--as-red-dark);
    border-color: var(--as-red-dark);
    box-shadow: 0 10px 32px rgba(196, 18, 48, 0.55);
}

/* --------------------------------------------------------------------------
   7. Landing page: sections (.as-*)
   -------------------------------------------------------------------------- */

.as-landing {
    max-width: 61rem;
    margin: 0 auto;
    padding: 0 0.8rem;
    /* Belt and braces: wide artifacts scroll inside their own cards; the
       landing column itself never scrolls horizontally. */
    overflow-x: clip;
}

.as-section {
    margin: 5rem 0;
}

.as-landing h2 {
    font-size: 1.6rem;
    font-weight: 750;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin: 0 0 1rem;
    color: var(--md-default-fg-color);
}

.as-landing p {
    font-size: 0.82rem;
    line-height: 1.65;
    color: var(--as-text-secondary);
}

.as-lede {
    max-width: 42rem;
    margin: 0 0 1.8rem;
}

.as-proof {
    border-left: 3px solid var(--as-red);
    padding: 0.5rem 0 0.5rem 0.9rem;
    background: var(--as-red-tint);
    border-radius: 0 var(--as-radius-sm) var(--as-radius-sm) 0;
}

.as-proof strong {
    color: var(--md-default-fg-color);
}

/* Two-column pillar layout */
.as-section__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.6rem;
    align-items: center;
}

.as-section__copy h2 {
    margin-top: 0;
}

/* Grid/flex items default to min-width:auto, letting wide <pre> content
   blow the column past the viewport on phones. */
.as-section__grid > * {
    min-width: 0;
}

.as-section__artifact {
    min-width: 0;
}

/* Terminal + snippet cards */
.as-terminal,
.as-snippet {
    border-radius: var(--as-radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: #14181f;
    box-shadow: var(--as-shadow-md);
    text-align: left;
    min-width: 0;
    max-width: 100%;
}

.as-terminal__bar,
.as-snippet__bar {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.45rem 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    font-size: 0.62rem;
    letter-spacing: 0.04em;
    color: rgba(255, 255, 255, 0.55);
}

.as-snippet__bar code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

.as-terminal__dots {
    display: inline-flex;
    gap: 0.3rem;
}

.as-terminal__dots i {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
}

.as-terminal__title {
    flex: 1;
}

.as-snippet__bar span {
    flex: 1;
}

.as-terminal pre,
.as-snippet pre {
    margin: 0;
    padding: 0.85rem 1rem;
    overflow-x: auto;
}

.as-terminal code,
.as-snippet code {
    display: block;
    background: none;
    padding: 0;
    font-size: 0.68rem;
    line-height: 1.75;
    color: #e8edf4;
    white-space: pre;
}

/* mkdocs-material injects its own copy icon into pre>code; our cards have one */
.as-terminal .md-clipboard,
.as-snippet .md-clipboard {
    display: none;
}

.as-prompt {
    color: var(--as-red-light);
    font-weight: 700;
}

.as-ok {
    color: #4ade80;
    font-weight: 700;
}

.as-dim {
    color: rgba(232, 237, 244, 0.45);
}

.as-copy {
    font: inherit;
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: rgba(255, 255, 255, 0.75);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 0.9rem;
    padding: 0.12rem 0.7rem;
    cursor: pointer;
    transition: background var(--as-transition), color var(--as-transition);
}

.as-copy:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}

.as-snippet--center {
    max-width: 36rem;
    margin: 0 auto;
}

/* Media artifacts */
.as-video {
    width: 100%;
    display: block;
    border-radius: var(--as-radius);
    border: 1px solid var(--as-border);
    box-shadow: var(--as-shadow-md);
    background: #000;
}

.as-caption {
    font-size: 0.7rem;
    line-height: 1.55;
    color: var(--as-text-secondary);
    margin: 0.7rem 0 0;
}

.as-caption--center {
    text-align: center;
    margin-top: 1rem;
}

/* CI test matrix */
.as-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.7rem;
    margin: 0 0 1.8rem;
}

.as-matrix__item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--as-border);
    border-radius: var(--as-radius-sm);
    background: var(--md-code-bg-color);
}

.as-matrix__item code {
    background: none;
    padding: 0;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--md-default-fg-color);
}

.as-matrix__item span {
    font-size: 0.65rem;
    color: var(--as-text-secondary);
}

/* Agent skills card */
.as-skills {
    border: 1px solid var(--as-border);
    border-radius: var(--as-radius);
    background: var(--md-code-bg-color);
    box-shadow: var(--as-shadow-sm);
    overflow: hidden;
}

.as-skills__bar {
    padding: 0.5rem 0.9rem;
    font-family: var(--md-code-font-family, monospace);
    font-size: 0.65rem;
    color: var(--as-text-secondary);
    border-bottom: 1px solid var(--as-border);
}

.as-skills__grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0.9rem;
}

.as-skills__grid span {
    font-family: var(--md-code-font-family, monospace);
    font-size: 0.62rem;
    padding: 0.18rem 0.6rem;
    border-radius: 1rem;
    border: 1px solid var(--as-border);
    background: var(--md-default-bg-color);
    color: var(--md-default-fg-color);
}

.as-skills__grid .as-skills__more {
    border-style: dashed;
    color: var(--as-text-secondary);
}

/* Full-system screenshot */
.as-arch {
    border: 1px solid var(--as-border);
    border-radius: var(--as-radius);
    box-shadow: var(--as-shadow-lg);
    overflow: hidden;
}

.as-arch img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Provenance + final CTA */
.as-provenance .as-lede {
    max-width: 48rem;
}

.as-cta {
    margin: 5rem 0 3rem;
    text-align: center;
}

.as-cta h2 {
    font-size: 1.8rem;
    margin-bottom: 1.4rem;
}

.as-cta .md-button--primary {
    background: var(--as-red);
    border-color: var(--as-red);
    color: #fff;
}

.as-cta .md-button {
    margin: 0.3rem;
}

/* Hero additions */
.mdx-hero__actions {
    margin-top: 1.6rem;
}

.mdx-hero__footnote {
    font-size: 0.62rem !important;
    color: rgba(255, 255, 255, 0.55) !important;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.5);
    margin: 1.4rem auto 0 !important;
    max-width: 34rem;
}

.as-terminal--hero {
    max-width: min(40rem, 100%);
    margin: 0 auto;
    text-align: left;
    background: rgba(13, 16, 22, 0.82);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.as-terminal--hero code {
    font-size: 0.64rem;
}

/* Short laptop viewports (13" MacBooks etc.): tighten the hero so the
   quickstart, CTAs, and footnote all fit without clipping or scrolling. */
@media screen and (max-height: 900px) {
    .mdx-hero {
        padding: 2.5rem 0 2rem;
    }

    .mdx-hero h1 {
        font-size: clamp(1.9rem, 4.5vw, 2.7rem);
        margin-bottom: 0.7rem;
    }

    .mdx-hero p {
        font-size: clamp(0.9rem, 1.6vw, 1.05rem);
        margin-bottom: 1.4rem;
    }

    .mdx-hero__badge {
        margin-bottom: 1rem;
    }

    .as-terminal--hero code {
        font-size: 0.6rem;
        line-height: 1.6;
    }

    .mdx-hero__actions {
        margin-top: 1.1rem;
    }

    .mdx-hero__footnote {
        margin-top: 0.9rem !important;
    }
}

/* --------------------------------------------------------------------------
   8. Responsive adjustments
   -------------------------------------------------------------------------- */

@media screen and (max-width: 76.1875em) {
    .as-landing h2 {
        font-size: 1.4rem;
    }
}

@media screen and (max-width: 900px) {
    .as-section {
        margin: 3.5rem 0;
    }

    .as-section__grid {
        grid-template-columns: 1fr;
        gap: 1.4rem;
    }

    /* keep prose above its artifact when stacked */
    .as-section__grid .as-section__copy {
        order: 0;
    }

    .as-section__grid .as-section__artifact {
        order: 1;
    }
}

@media screen and (max-width: 600px) {
    .splash-container {
        height: auto;
        min-height: calc(100svh - 98px);
    }

    .mdx-hero h1 br {
        display: none;
    }

    .as-terminal--hero code {
        font-size: 0.56rem;
    }

    .as-matrix {
        grid-template-columns: 1fr 1fr;
    }

    .as-matrix__item code {
        font-size: 0.62rem;
    }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
    .md-typeset .md-button,
    .mdx-hero .md-button {
        transition: none;
    }

    .md-typeset .md-button:hover,
    .mdx-hero .md-button:hover {
        transform: none;
    }
}