/* ==========================================================================
   Kuulla visual identity — "Signal"
   True-black, monospace-tagged, sync as the hero. Void surfaces, one lime
   accent used only where "signal" is meaningful (now playing, sync-fresh
   state, primary action), sharp corners, precise motion. Ships dark by
   default with a light counterpart; see theme.js for the toggle.
   Full system: docs/brand.md
   ========================================================================== */

:root {
    /* Accent — lime. A true signal colour, never decoration. See docs/brand.md. */
    --k-accent: #c6f24e;
    --k-accent-hover: #d4ff6b;
    --k-accent-active: #a9d63c;
    --k-accent-soft: rgba(150, 190, 50, 0.24);
    --k-accent-contrast: #0a0a0a;
    /* Accent used as text on the page background — lime fails AA on a light
       ground, so this darkens in light mode while the fills above stay lime. */
    --k-accent-ink: #4a6410;
    --k-accent-ink-hover: #3a4f0c;

    --k-success: #3aa66f;
    --k-success-soft: rgba(58, 166, 111, 0.16);
    --k-danger: #d83a3f;
    --k-danger-soft: rgba(216, 58, 63, 0.14);
    --k-info: #2f9fc4;
    --k-info-soft: rgba(47, 159, 196, 0.14);
    --k-warning: #c98a1f;
    --k-warning-soft: rgba(201, 138, 31, 0.16);

    /* Signal is sharp — a deliberate reduction from the old 0.5–1.125rem. */
    --k-radius-sm: 4px;
    --k-radius: 6px;
    --k-radius-lg: 10px;
    --k-radius-pill: 999px;

    --k-font: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --k-font-display: "Space Grotesk", var(--k-font);
    --k-font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    --k-shadow-sm: 0 1px 2px rgba(5, 5, 5, 0.12);
    --k-shadow: 0 6px 20px -4px rgba(5, 5, 5, 0.22);
    --k-shadow-lg: 0 16px 40px -8px rgba(5, 5, 5, 0.34);
}

/* Light theme (default palette) — the Signal light counterpart. */
:root,
[data-bs-theme="light"] {
    --k-bg: #f4f4f2;
    --k-surface: #ffffff;
    --k-surface-2: #ececea;
    --k-surface-3: #e2e2df;
    --k-border: #d8d8d4;
    --k-text: #0a0a0a;
    --k-text-muted: #5a5f68;
    --k-text-faint: #8a8f98;
    --k-shadow-color: rgba(10, 10, 10, 0.12);
}

/* Dark theme — Signal, true black. */
[data-bs-theme="dark"] {
    --k-bg: #050505;
    --k-surface: #111111;
    --k-surface-2: #181818;
    --k-surface-3: #1f1f1f;
    --k-border: #1c1c1c;
    --k-text: #f4f4f2;
    --k-text-muted: #8a8f98;
    --k-text-faint: #5a5f68;
    --k-shadow-color: rgba(0, 0, 0, 0.6);

    /* Lime reads cleanly as text on true black — no darkening needed here. */
    --k-accent-ink: #c6f24e;
    --k-accent-ink-hover: #d4ff6b;
    --k-accent-soft: rgba(198, 242, 78, 0.14);
    --k-success: #4ade80;
    --k-success-soft: rgba(74, 222, 128, 0.18);
    --k-danger: #f2555a;
    --k-danger-soft: rgba(242, 85, 90, 0.18);
    --k-info: #5ac8e8;
    --k-info-soft: rgba(90, 200, 232, 0.18);
    --k-warning: #e8b84a;
    --k-warning-soft: rgba(232, 184, 74, 0.2);
}

/* ---------------------------------------------------------------------- */
/* Base                                                                    */
/* ---------------------------------------------------------------------- */

html, body {
    background-color: var(--k-bg);
    color: var(--k-text);
    font-family: var(--k-font);
    -webkit-font-smoothing: antialiased;
}

body {
    min-height: 100vh;
}

/* Native form controls (audio scrubber, checkboxes, date pickers) follow the
   theme and take the lime accent. */
:root, [data-bs-theme="light"] { color-scheme: light; }
[data-bs-theme="dark"] { color-scheme: dark; }

audio, input, .form-check-input {
    accent-color: var(--k-accent);
}

audio {
    width: 100%;
    border-radius: var(--k-radius-sm);
}

/* Timestamps, durations, LUFS, IDs — anything from the audio or sync engine. */
.font-monospace {
    font-family: var(--k-font-mono) !important;
    font-feature-settings: "tnum" 1;
}

.k-meta {
    font-family: var(--k-font-mono);
    font-size: 0.8125rem;
    color: var(--k-text-muted);
    font-feature-settings: "tnum" 1;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--k-font-display);
    font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--k-text);
}

h1 {
    font-size: 1.75rem;
    margin-bottom: 1.25rem;
}

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

a, .btn-link {
    color: var(--k-accent-ink);
}

a:hover, .btn-link:hover {
    color: var(--k-accent-ink-hover);
}

.content {
    padding-top: 1.5rem;
    padding-bottom: 3rem;
}

h1:focus {
    outline: none;
}

::selection {
    background: var(--k-accent-soft);
}

.btn:focus-visible, .btn:active:focus-visible, .btn-link.nav-link:focus-visible,
.form-control:focus-visible, .form-check-input:focus-visible, .form-select:focus-visible {
    box-shadow: 0 0 0 0.2rem var(--k-accent-soft);
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--k-success);
}

.invalid {
    outline: 1px solid var(--k-danger);
}

.validation-message {
    color: var(--k-danger);
}

/* ---------------------------------------------------------------------- */
/* Cards                                                                   */
/* ---------------------------------------------------------------------- */

.card {
    background-color: var(--k-surface);
    border: 1px solid var(--k-border);
    border-radius: var(--k-radius);
    box-shadow: var(--k-shadow-sm);
    /* Signal is precise, not bouncy — hover shifts the border, nothing moves. */
    transition: border-color 0.13s ease-out, box-shadow 0.13s ease-out;
}

a .card:hover, a.card:hover, .card.h-100:hover {
    box-shadow: var(--k-shadow);
    border-color: var(--k-accent);
}

.card-title {
    color: var(--k-text);
    font-family: var(--k-font-display);
    font-weight: 700;
}

.card-text, .card-body {
    color: var(--k-text);
}

/* ---------------------------------------------------------------------- */
/* Buttons                                                                 */
/* ---------------------------------------------------------------------- */

.btn {
    /* Softly rounded like a normal media-player button — the sharp radii
       stay on cards, inputs and chips. */
    border-radius: var(--k-radius-lg);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.btn-primary {
    color: var(--k-accent-contrast);
    background-color: var(--k-accent);
    border-color: var(--k-accent);
}

.btn-primary:hover, .btn-primary:active {
    color: var(--k-accent-contrast);
    background-color: var(--k-accent-hover);
    border-color: var(--k-accent-hover);
}

.btn-primary:disabled, .btn-primary.disabled {
    background-color: var(--k-accent);
    border-color: var(--k-accent);
    opacity: 0.5;
}

.btn-outline-primary {
    color: var(--k-accent-ink);
    border-color: var(--k-accent);
}

.btn-outline-primary:hover, .btn-outline-primary.active, .btn-outline-primary:active {
    color: var(--k-accent-contrast);
    background-color: var(--k-accent);
    border-color: var(--k-accent);
}

.btn-outline-secondary {
    color: var(--k-text-muted);
    border-color: var(--k-border);
}

.btn-outline-secondary:hover {
    color: var(--k-text);
    background-color: var(--k-surface-2);
    border-color: var(--k-border);
}

.btn-outline-danger {
    color: var(--k-danger);
    border-color: var(--k-danger);
}

.btn-outline-danger:hover {
    color: #fff;
    background-color: var(--k-danger);
    border-color: var(--k-danger);
}

.btn-outline-info {
    color: var(--k-info);
    border-color: var(--k-info);
}

.btn-outline-info:hover {
    color: #fff;
    background-color: var(--k-info);
    border-color: var(--k-info);
}

.btn-danger {
    color: #fff;
    background-color: var(--k-danger);
    border-color: var(--k-danger);
}

.btn-group .btn {
    border-radius: var(--k-radius-sm) !important;
}

/* ---------------------------------------------------------------------- */
/* Badges                                                                  */
/* ---------------------------------------------------------------------- */

.badge {
    font-weight: 700;
    border-radius: var(--k-radius-pill);
}

.badge.bg-primary {
    background-color: var(--k-accent) !important;
    color: var(--k-accent-contrast) !important;
}

.text-bg-secondary {
    background-color: var(--k-surface-3) !important;
    color: var(--k-text-muted) !important;
}

.text-bg-success {
    background-color: var(--k-success-soft) !important;
    color: var(--k-success) !important;
}

.badge.bg-success {
    background-color: var(--k-success) !important;
}

.badge.bg-info {
    background-color: var(--k-info) !important;
    color: #fff !important;
}

.badge.bg-secondary {
    background-color: var(--k-surface-3) !important;
    color: var(--k-text-muted) !important;
}

/* ---------------------------------------------------------------------- */
/* Lists / tables                                                          */
/* ---------------------------------------------------------------------- */

.list-group-item {
    background-color: var(--k-surface);
    border-color: var(--k-border);
    color: var(--k-text);
}

.list-group-item-action:hover, .list-group-item-action:focus {
    background-color: var(--k-surface-2);
    color: var(--k-text);
}

.list-group-item.active {
    background-color: var(--k-accent-soft);
    border-color: var(--k-accent-soft);
    color: var(--k-accent-ink);
}

.list-group {
    border-radius: var(--k-radius);
    overflow: hidden;
}

/* Search-match highlight — lime-soft, not the browser's yellow. */
mark {
    background: var(--k-accent-soft);
    color: var(--k-text);
    border-radius: var(--k-radius-sm);
    padding: 0 0.15em;
}

.table {
    color: var(--k-text);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--k-border);
}

/* ---------------------------------------------------------------------- */
/* Forms                                                                   */
/* ---------------------------------------------------------------------- */

.form-control, .form-select {
    background-color: var(--k-surface-2);
    border-color: var(--k-border);
    color: var(--k-text);
    border-radius: var(--k-radius-sm);
}

.form-control:focus, .form-select:focus {
    background-color: var(--k-surface-2);
    color: var(--k-text);
    border-color: var(--k-accent);
    box-shadow: 0 0 0 0.2rem var(--k-accent-soft);
}

.form-label {
    font-weight: 600;
    color: var(--k-text);
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--k-text-faint);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

.darker-border-checkbox.form-check-input {
    border-color: var(--k-border);
}

/* ---------------------------------------------------------------------- */
/* Progress / status                                                       */
/* ---------------------------------------------------------------------- */

.progress {
    background-color: var(--k-surface-3);
    border-radius: var(--k-radius-pill);
}

.progress-bar {
    background-color: var(--k-accent);
}

.spinner-border {
    color: var(--k-accent-ink);
}

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

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

.alert {
    border-radius: var(--k-radius);
    border: 1px solid var(--k-border);
}

.alert-secondary {
    background-color: var(--k-surface-2);
    color: var(--k-text);
    border-color: var(--k-border);
}

/* ---------------------------------------------------------------------- */
/* Error boundary / connection banners                                     */
/* ---------------------------------------------------------------------- */

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, var(--k-danger);
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
    border-radius: var(--k-radius);
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }