/* ── Klang Design Tokens ──────────────────────────────────────────────────── */
:root {
    --klang-bg-app:         #191C22;
    --klang-bg-menu:        #12131c;
    --klang-bg-panel:       #21252b;
    --klang-bg-card:        #2c313a;
    --klang-bg-overlay:     #353a42;

    --klang-text-primary:   #D7DADF;
    --klang-text-secondary: #abb2bf;
    --klang-text-tertiary:  #5c6370;

    --klang-accent:         #528bff;
    /* Desaturated, darker accent — for large surfaces (frames, edge lights)
       where the full accent reads too loud */
    --klang-accent-muted:   #5c7cbc;
    --klang-gold:           #EBC773;
    --klang-bronze:         #362820;

    --klang-border-radius:  4px;
    --klang-transition:     200ms ease;

    /* Ring border shared by round gauges, round buttons and the LCD counter —
       text-secondary (#abb2bf) at 90% brightness */
    --klang-gauge-ring:     #9aa0ac;

    --klang-excellent:      #56b6c2;
    --klang-good:           #98c379;
    --klang-moderate:       #e5c07b;
    --klang-warning:        #d19a66;
    --klang-critical:       #e06c75;
}

/* ── Text selection ───────────────────────────────────────────────────────── */
::selection,
input::selection,
textarea::selection,
*::selection {
    background-color: var(--klang-gold) !important;
    color: #000000 !important;
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.ui.button {
    transition: var(--klang-transition) !important;
}

.ui.positive.button {
    background-color: var(--klang-gold) !important;
    color: #000000 !important;
}
.ui.positive.button:hover {
    background-color: #f0c55a !important;
}
/* The main answer has the keyboard when a question opens (a yes or no modal): show it */
.ui.positive.button:focus {
    box-shadow: 0 0 0 2px var(--klang-text-primary) !important;
}

/* ── Dimmer ───────────────────────────────────────────────────────────────── */
.ui.page.dimmer {
    background: rgba(0, 0, 0, 0.2) !important;
    backdrop-filter: blur(0.5px) !important;
    -webkit-backdrop-filter: blur(0.5px) !important;
}

/* ── Fomantic UI dark overrides ───────────────────────────────────────────── */
.ui.basic.popup {
    background: var(--klang-bronze) !important;
    border-color: var(--klang-text-tertiary) !important;
    border-radius: var(--klang-border-radius) !important;
    box-shadow: 0 0 3px var(--klang-text-tertiary) !important;
}

.ui.menu {
    background: var(--klang-bg-menu) !important;
    border-color: var(--klang-bg-panel) !important;
}
.ui.menu .item {
    color: var(--klang-text-primary) !important;
}
.ui.menu .active.item {
    color: #ffffff !important;
    background: var(--klang-bg-card) !important;
}

.ui.modal {
    background: var(--klang-bg-card) !important;
    color: var(--klang-text-primary) !important;
    border: 1px solid var(--klang-text-tertiary) !important;
    border-radius: var(--klang-border-radius) !important;
    box-shadow: 0 0 3px var(--klang-text-tertiary) !important;
}
.ui.modal .ui.header {
    color: var(--klang-text-secondary) !important;
    background: transparent !important;
}
/* Semantic paints a modal's header, content and actions white: let the modal's own background show through */
.ui.modal > .header,
.ui.modal > .content,
.ui.modal > .actions {
    background: transparent !important;
    color: var(--klang-text-primary) !important;
}
.ui.modal > .actions {
    border-top: 1px solid var(--klang-text-tertiary) !important;
}
.ui.modal .ui.divider {
    border-top-color: var(--klang-bg-app) !important;
    border-bottom-color: transparent !important;
}
.ui.modal .ui.form .field > label {
    color: var(--klang-text-secondary) !important;
}
.ui.modal .ui.basic.button {
    color: var(--klang-text-primary) !important;
    box-shadow: 0 0 0 1px var(--klang-text-tertiary) inset !important;
}
.ui.modal .ui.basic.button:hover {
    color: #ffffff !important;
    box-shadow: 0 0 0 1px var(--klang-text-secondary) inset !important;
    background: transparent !important;
}
.ui.modal .ui.basic.label {
    background: transparent !important;
    color: var(--klang-text-secondary) !important;
    border-color: var(--klang-text-tertiary) !important;
}

/* ── Headers ──────────────────────────────────────────────────────────────── */
.ui.header {
    color: var(--klang-text-primary) !important;
}

.ui.segment {
    background: var(--klang-bg-card) !important;
    color: var(--klang-text-primary) !important;
}
.ui.basic.segment {
    background: transparent !important;
    color: white !important;
}
.ui.secondary.segment {
    background: var(--klang-bg-panel) !important;
}
.ui.placeholder.segment {
    background: var(--klang-bg-card) !important;
}
.ui.placeholder.segment .header {
    color: var(--klang-text-secondary) !important;
}

/* ── Segments group ───────────────────────────────────────────────────────── */
.ui.segments {
    border-color: var(--klang-bg-overlay) !important;
    box-shadow: none !important;
}
.ui.segments .segment {
    border-color: var(--klang-bg-overlay) !important;
}

/* ── Messages ─────────────────────────────────────────────────────────────── */
.ui.message {
    background: var(--klang-bg-overlay) !important;
    color: var(--klang-text-primary) !important;
    box-shadow: none !important;
}
.ui.message .header {
    color: var(--klang-text-primary) !important;
}

/* ── Labels ───────────────────────────────────────────────────────────────── */
.ui.label:not(.basic) {
    background: var(--klang-bg-overlay) !important;
    color: var(--klang-text-secondary) !important;
    border-color: var(--klang-bg-overlay) !important;
}

/* ── Lists ────────────────────────────────────────────────────────────────── */
.ui.list .item {
    color: var(--klang-text-primary) !important;
}

/* ── Links ────────────────────────────────────────────────────────────────── */
a {
    color: var(--klang-gold) !important;
    transition: color var(--klang-transition);
}
a:hover {
    color: #f0c55a !important;
}

/* ── Code blocks ──────────────────────────────────────────────────────────── */
pre, code {
    color: var(--klang-text-primary) !important;
}

/* ── Cards ────────────────────────────────────────────────────────────────── */
.ui.cards > .card,
.ui.card {
    background: var(--klang-bg-overlay) !important;
    color: var(--klang-text-primary) !important;
    box-shadow: 0 1px 3px rgba(0,0,0,0.4) !important;
}
.ui.cards > .card .content,
.ui.card .content {
    border-top-color: var(--klang-bg-card) !important;
}
.ui.cards > .card .header,
.ui.card .header {
    color: var(--klang-text-primary) !important;
}
.ui.cards > .card .meta,
.ui.card .meta {
    color: var(--klang-text-secondary) !important;
}

/* ── Basic buttons (global) ───────────────────────────────────────────────── */
.ui.basic.button,
.ui.basic.buttons .button {
    color: var(--klang-text-primary) !important;
    box-shadow: 0 0 0 1px var(--klang-text-tertiary) inset !important;
    background: transparent !important;
    transition: color var(--klang-transition), box-shadow var(--klang-transition) !important;
}
.ui.basic.button:hover,
.ui.basic.buttons .button:hover {
    color: #ffffff !important;
    box-shadow: 0 0 0 1px var(--klang-text-secondary) inset !important;
    background: transparent !important;
}

/* ── labels (global) ────────────────────────────────────────────────── */
.ui.basic.label {
    background: transparent !important;
    color: var(--klang-text-secondary) !important;
    border-color: var(--klang-text-tertiary) !important;
}

.ui.label > .icon {
    padding-right: 0.5em !important;
}

/* Shared ring border for round gauges and round buttons */
.ui.basic.label.gauge-ring {
    border-color: var(--klang-gauge-ring) !important;
}

/* ── Textarea ─────────────────────────────────────────────────────────────── */
textarea {
    border: 1px solid var(--klang-bg-overlay) !important;
    caret-color: var(--klang-gold) !important;
    transition: border-color var(--klang-transition), box-shadow var(--klang-transition) !important;
}
textarea:focus {
    border-color: var(--klang-gold) !important;
    box-shadow: 0 0 0 1px var(--klang-gold) inset !important;
    outline: none !important;
}

/* ── Dropdown ─────────────────────────────────────────────────────────────── */
.ui.selection.dropdown {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--klang-text-primary) !important;
    border: 1px solid var(--klang-bg-overlay) !important;
    transition: border-color var(--klang-transition), box-shadow var(--klang-transition), color var(--klang-transition) !important;
}
.ui.selection.dropdown:hover,
.ui.selection.active.dropdown {
    border-color: var(--klang-gold) !important;
    box-shadow: 0 0 0 1px var(--klang-gold) inset !important;
    color: #ffffff !important;
}
.ui.selection.dropdown > .dropdown.icon {
    color: var(--klang-text-secondary) !important;
    transition: color var(--klang-transition) !important;
}
.ui.selection.dropdown:hover > .dropdown.icon,
.ui.selection.active.dropdown > .dropdown.icon {
    color: var(--klang-gold) !important;
}
.ui.selection.dropdown .menu {
    background: var(--klang-bg-overlay) !important;
    border-color: var(--klang-bg-overlay) !important;
}
.ui.selection.dropdown .menu > .item {
    color: var(--klang-text-primary) !important;
    border-top-color: var(--klang-bg-card) !important;
}
.ui.selection.dropdown .menu > .item:hover {
    background: var(--klang-bg-card) !important;
    color: #ffffff !important;
}
.ui.selection.dropdown .menu > .item.selected,
.ui.selection.dropdown .menu > .item.active {
    background: var(--klang-bg-card) !important;
    color: var(--klang-gold) !important;
    font-weight: normal !important;
}

/* ── Input fields ─────────────────────────────────────────────────────────── */
.ui.input > input,
.ui.form input:not([type]),
.ui.form input[type="text"],
.ui.form input[type="number"],
.ui.form input[type="email"],
.ui.form input[type="password"],
.ui.form input[type="search"],
.ui.form input[type="url"] {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--klang-text-primary) !important;
    caret-color: var(--klang-gold) !important;
    border: 1px solid var(--klang-bg-overlay) !important;
    transition: border-color var(--klang-transition), box-shadow var(--klang-transition) !important;
}

.ui.input > input[type="number"]::-webkit-inner-spin-button,
.ui.form input[type="number"]::-webkit-inner-spin-button {
    opacity: 0.2;
    filter: invert(1);
    transition: opacity var(--klang-transition);
}

.ui.input > input[type="number"]:focus::-webkit-inner-spin-button,
.ui.form input[type="number"]:focus::-webkit-inner-spin-button {
    opacity: 1;
    filter: invert(1) sepia(1) saturate(4) hue-rotate(5deg) brightness(1.1);
}

.ui.input > input:focus,
.ui.form input:focus {
    background: rgba(0, 0, 0, 0.7) !important;
    color: #ffffff !important;
    border-color: var(--klang-gold) !important;
    box-shadow: 0 0 0 1px var(--klang-gold) inset !important;
}

.ui.input > input::placeholder,
.ui.form input::placeholder {
    color: var(--klang-text-secondary) !important;
}

.ui.input .ui.label,
.ui.form .ui.label {
    padding-top: 12px !important;
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--klang-text-secondary) !important;
}

/* ── Custom Scrollbar Styling ─────────────────────────────────────────────── */
/* Custom Scrollbar Styling */
/* For Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

/* For WebKit (Chrome, Edge, Safari) */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

/* Aggressively hide all scrollbar arrows (buttons) and corners */
::-webkit-scrollbar-button,
::-webkit-scrollbar-corner {
    display: none !important;
    width: 0px !important;
    height: 0px !important;
    background-color: transparent !important;
    -webkit-appearance: none !important;
    appearance: none !important;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

body {
    background-color: var(--klang-bg-app);
    min-height: 100vh;
}

/* ── Motor Background stacking context ───────────────────────────────────── */
#spa {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* CodeMirror live code highlighting is now rendered on a PixiJS (WebGL) canvas overlay —
   see CodeMirrorHighlightBuffer. The former DOM `<mark>` overlay rules and `@keyframes pulse`
   lived here and were removed. */

.fade-out {
    animation: fadeOut 300ms linear forwards;
}

@keyframes iconGlow {
    0%, 100% {
        color: color-mix(in srgb, var(--icon-glow-color) 10%, black);
        text-shadow: none;
    }
    50% {
        color: var(--icon-glow-color);
        text-shadow: 0 0 3px var(--icon-glow-color);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}

.noise-bg {
    /* Set background to transparent as requested */
    background-color: transparent;

    /*
       Updated SVG:
       1. Added <feColorMatrix>: Forces pixels to black (RGB=0) and maps noise intensity to Alpha.
       2. Opacity controls the strength of the black dust.
    */
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  1 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.02'/%3E%3C/svg%3E");
}

/* ── Surface noise ────────────────────────────────────────────────────────── */
/* Editor surface: slight white grain over the black CodeMirror background.
   RGB is forced to white here — the black dust of .noise-bg would be invisible on #000. */
.code-mirror-container .cm-editor,
.code-mirror-container .cm-gutters {
    /* Explicit width/height on the svg: without an intrinsic size the tile
       stretches to the whole editor and magnifies the grain — fixed 200px
       tiles repeat instead, keeping the grain fine at any editor size. */
    background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilterWhite'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  1 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilterWhite)' opacity='0.05'/%3E%3C/svg%3E");
}

/* Editor that fills its host and scrolls itself (the code song page, for the
   minimap): passes the host's height down through the editor's wrapper divs
   to .cm-editor, whose height the minimap theme sets to 100%. */
.klang-editor-fill > div,
.klang-editor-fill .code-mirror-container,
.klang-editor-fill .code-mirror-container > div {
    height: 100%;
}

/* Black surface with the editor's fine white grain — the code page header
   uses it so header and editor read as one continuous surface.
   The .ui.basic.segment leg out-specifies `.ui.basic.segment { background: transparent !important }`. */
.black-noise-bg,
.ui.basic.segment.black-noise-bg {
    background-color: #000000 !important;
    background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilterWhite'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  1 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilterWhite)' opacity='0.05'/%3E%3C/svg%3E") !important;
}

/* App chrome (sidebar + page/header): menu grey with a slowly LIVING grain.
   Two static noise tiles (different turbulence seeds, fixed 200px tiles so the
   grain scale is identical on every element) sit on ::before/::after and
   cross-fade via compositor-friendly opacity keyframes — mirrored ease curves,
   so the summed grain intensity stays constant while the pattern morphs.
   `isolation: isolate` keeps the z-index:-1 layers above this element's own
   background but below all content.
   The .ui.basic.segment leg out-specifies `.ui.basic.segment { background: transparent !important }`. */
.chrome-bg,
.ui.basic.segment.chrome-bg {
    background-color: var(--klang-bg-menu) !important;
    position: relative;
    isolation: isolate;
}
.chrome-bg::before,
.chrome-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilterWhite'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' seed='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  1 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilterWhite)' opacity='0.09'/%3E%3C/svg%3E");
    animation: chromeNoiseA 17s ease-in-out infinite;
}
.chrome-bg::after {
    background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilterWhite'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' seed='7' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  1 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilterWhite)' opacity='0.09'/%3E%3C/svg%3E");
    animation: chromeNoiseB 17s ease-in-out infinite;
}
@keyframes chromeNoiseA {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0; }
}
@keyframes chromeNoiseB {
    0%, 100% { opacity: 0; }
    50%      { opacity: 1; }
}

#spa {
    min-height: 100vh;
}