:root {
    color-scheme: dark;
    --background: #090b0d;
    --surface: #111519;
    --surface-raised: #171c21;
    --border: rgba(255, 255, 255, 0.1);
    --text: #f5f6f7;
    --muted: #b7bec5;
    --accent: #f3aa33;
    --accent-light: #ffd188;
    --accent-soft: rgba(243, 170, 51, 0.12);
    --success: #7fcaa2;
    --paper: #f1ece2;
    --paper-text: #241f19;
    --max-width: 1240px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 9rem;
}

body {
    min-width: 320px;
    margin: 0;
    background:
        radial-gradient(circle at 11% 2%, rgba(243, 170, 51, 0.1), transparent 31rem),
        var(--background);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 1rem;
    line-height: 1.65;
}

a {
    color: var(--accent);
    text-underline-offset: 0.2em;
}

a:hover {
    color: var(--accent-light);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 3px;
}

button,
input,
select {
    font: inherit;
}

[hidden] {
    display: none !important;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    border-bottom: 1px solid var(--border);
    background: rgba(9, 11, 13, 0.92);
    backdrop-filter: blur(16px);
}

.nav-shell {
    position: relative;
    width: min(calc(100% - 2rem), var(--max-width));
    min-height: 4.75rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text);
    text-decoration: none;
    font-weight: 750;
    white-space: nowrap;
}

.brand img {
    width: 2.65rem;
    height: 2.65rem;
    object-fit: contain;
}

.brand span {
    color: var(--accent);
    letter-spacing: 0.01em;
}

.desktop-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.12rem;
}

.desktop-nav a,
.mobile-nav nav a {
    padding: 0.5rem 0.67rem;
    border-radius: 0.5rem;
    color: var(--muted);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 680;
    white-space: nowrap;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"],
.mobile-nav nav a:hover,
.mobile-nav nav a[aria-current="page"] {
    color: var(--text);
    background: var(--accent-soft);
}

.desktop-nav .member-link,
.mobile-nav nav .member-link {
    margin-left: 0.35rem;
    border: 1px solid rgba(243, 170, 51, 0.4);
    color: var(--accent-light);
}

.mobile-nav {
    display: none;
}

.mobile-nav summary {
    width: 2.7rem;
    height: 2.7rem;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    color: var(--text);
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    list-style: none;
}

.mobile-nav summary::-webkit-details-marker {
    display: none;
}

.mobile-nav summary svg {
    width: 1.3rem;
    height: 1.3rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
}

.mobile-nav nav {
    position: absolute;
    top: calc(100% - 0.25rem);
    right: 0;
    width: min(290px, calc(100vw - 2rem));
    padding: 0.55rem;
    display: grid;
    gap: 0.15rem;
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    background: rgba(12, 16, 19, 0.98);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(16px);
}

.mobile-nav nav a {
    padding: 0.7rem 0.75rem;
}

.mobile-nav nav .member-link {
    margin: 0.3rem 0 0;
}

.section-nav {
    position: sticky;
    top: 4.75rem;
    z-index: 20;
    border-bottom: 1px solid var(--border);
    background: rgba(12, 16, 19, 0.94);
    backdrop-filter: blur(14px);
}

.section-nav-shell {
    width: min(calc(100% - 2rem), var(--max-width));
    min-height: 3.2rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.section-nav-shell > span {
    flex: 0 0 auto;
    color: var(--muted);
    font-size: 0.67rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.section-nav-shell > div {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.15rem;
}

.section-nav a {
    padding: 0.45rem 0.65rem;
    border-radius: 0.45rem;
    color: var(--muted);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
}

.section-nav a:hover {
    color: var(--text);
    background: var(--accent-soft);
}

.eyebrow {
    margin: 0 0 0.8rem;
    color: var(--accent);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

.button {
    min-height: 3.15rem;
    padding: 0.75rem 1.2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    border: 1px solid;
    border-radius: 0.65rem;
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 800;
    transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    border-color: var(--accent);
    color: #17100a;
    background: var(--accent);
}

.button-primary:hover {
    color: #17100a;
    background: var(--accent-light);
    box-shadow: 0 9px 26px rgba(243, 170, 51, 0.18);
}

.songbook-hero,
.catalogue-section,
.practice-guide,
.song-detail-hero,
.quick-song-search,
.rehearsal-layout,
.song-sequence,
.song-error-page {
    width: min(calc(100% - 2rem), var(--max-width));
    margin-inline: auto;
}

#catalogue,
#practice-guide,
#voice-parts,
#lyrics,
#performance-video,
#song-navigation {
    scroll-margin-top: 9rem;
}

/* Song catalogue */
.songbook-hero {
    padding: clamp(3.75rem, 8vw, 7rem) 0 clamp(3.5rem, 7vw, 5rem);
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: clamp(2.5rem, 7vw, 6rem);
}

.songbook-hero h1,
.song-detail-hero h1,
.song-error-page h1 {
    margin-bottom: 0;
    font-size: clamp(2.8rem, 6.5vw, 5.6rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
}

.songbook-hero h1 span {
    color: var(--accent);
}

.hero-copy {
    max-width: 720px;
    margin: 1.5rem 0 0;
    color: var(--muted);
    font-size: clamp(1rem, 2vw, 1.16rem);
}

.catalogue-overview {
    min-width: 390px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: rgba(17, 21, 25, 0.72);
    overflow: hidden;
}

.catalogue-overview div {
    padding: 1.2rem;
    border-right: 1px solid var(--border);
}

.catalogue-overview div:last-child {
    border-right: 0;
}

.catalogue-overview strong,
.catalogue-overview span {
    display: block;
}

.catalogue-overview strong {
    color: var(--accent);
    font-size: 1.6rem;
    line-height: 1;
}

.catalogue-overview span {
    margin-top: 0.3rem;
    color: var(--muted);
    font-size: 0.7rem;
}

.catalogue-section {
    padding-bottom: clamp(5rem, 10vw, 8rem);
}

.catalogue-heading {
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: 1fr minmax(280px, 0.62fr);
    align-items: end;
    gap: 3rem;
}

.catalogue-heading h2,
.practice-guide-heading h2,
.panel-heading h2,
.lyrics-toolbar h2,
.video-panel h2 {
    margin-bottom: 0;
    font-size: clamp(1.75rem, 4vw, 3rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.catalogue-heading > p {
    margin-bottom: 0.2rem;
    color: var(--muted);
}

.catalogue-controls {
    padding: 1.2rem;
    display: grid;
    grid-template-columns: minmax(260px, 1.6fr) minmax(180px, 0.8fr) minmax(180px, 0.8fr) auto;
    align-items: end;
    gap: 0.9rem;
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: var(--surface);
}

.search-field,
.select-field {
    position: relative;
}

.search-field label,
.select-field label,
.practice-speed label,
.quick-song-search > label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 780;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.search-field > span,
.detail-search-field > span {
    position: absolute;
    bottom: 0.82rem;
    left: 0.85rem;
    color: var(--accent);
    pointer-events: none;
}

.search-field svg,
.detail-search-field svg {
    width: 1.05rem;
    height: 1.05rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
}

.search-field input,
.select-field select,
.practice-speed select,
.detail-search-field input {
    width: 100%;
    min-height: 3rem;
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    color: var(--text);
    background: rgba(6, 9, 11, 0.65);
}

.search-field input,
.detail-search-field input {
    padding: 0.7rem 0.85rem 0.7rem 2.6rem;
}

.select-field select,
.practice-speed select {
    padding: 0.7rem 2.2rem 0.7rem 0.8rem;
}

.search-field input:hover,
.select-field select:hover,
.practice-speed select:hover,
.detail-search-field input:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.clear-filters {
    min-height: 3rem;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 750;
}

.clear-filters:hover {
    border-color: rgba(243, 170, 51, 0.35);
    color: var(--text);
    background: var(--accent-soft);
}

.alphabet-filter {
    margin: 1rem 0;
    padding-bottom: 0.2rem;
    display: flex;
    gap: 0.3rem;
    overflow-x: auto;
    scrollbar-width: thin;
}

.alphabet-filter button {
    min-width: 2.35rem;
    min-height: 2.35rem;
    flex: 0 0 auto;
    border: 1px solid var(--border);
    border-radius: 0.55rem;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.025);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 800;
}

.alphabet-filter button:hover,
.alphabet-filter button[aria-pressed="true"] {
    border-color: rgba(243, 170, 51, 0.4);
    color: #17100a;
    background: var(--accent);
}

.catalogue-summary {
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--muted);
    font-size: 0.73rem;
}

.catalogue-summary span:first-child {
    color: var(--text);
    font-weight: 800;
}

.song-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.song-card {
    position: relative;
    min-width: 0;
    padding: 1.35rem;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: linear-gradient(145deg, rgba(23, 28, 33, 0.98), rgba(14, 17, 20, 0.98));
    overflow: hidden;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.17);
    transition: border-color 180ms ease, transform 180ms ease;
}

.song-card:hover {
    border-color: rgba(243, 170, 51, 0.28);
    transform: translateY(-3px);
}

.song-card-number {
    position: absolute;
    top: 0.85rem;
    right: 1rem;
    color: rgba(255, 255, 255, 0.1);
    font-size: 2rem;
    font-weight: 850;
    letter-spacing: -0.06em;
}

.song-card-heading {
    min-height: 5.8rem;
    padding-right: 2.6rem;
}

.song-card-heading p {
    margin-bottom: 0.3rem;
    color: var(--accent);
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.song-card-heading h3 {
    margin-bottom: 0;
    font-size: 1.18rem;
    line-height: 1.3;
    letter-spacing: -0.025em;
}

.song-card-heading h3 a {
    color: var(--text);
    text-decoration: none;
}

.song-card-heading h3 a:hover {
    color: var(--accent-light);
}

.song-metadata {
    margin: 0 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-block: 1px solid var(--border);
}

.song-metadata div {
    padding: 0.7rem 0;
}

.song-metadata div + div {
    padding-left: 0.8rem;
    border-left: 1px solid var(--border);
}

.song-metadata dt {
    color: var(--muted);
    font-size: 0.62rem;
    text-transform: uppercase;
}

.song-metadata dd {
    margin: 0.12rem 0 0;
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 750;
}

.resource-list {
    min-height: 4.1rem;
    margin-bottom: 1rem;
    display: flex;
    align-content: flex-start;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.resource-list span {
    height: fit-content;
    padding: 0.25rem 0.5rem;
    border: 1px solid rgba(127, 202, 162, 0.22);
    border-radius: 999px;
    color: #bce7cf;
    background: rgba(127, 202, 162, 0.07);
    font-size: 0.62rem;
    font-weight: 750;
}

.resource-list .resource-muted {
    border-color: var(--border);
    color: var(--muted);
    background: rgba(255, 255, 255, 0.025);
}

.open-song {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    padding-top: 0.8rem;
    border-top: 1px solid var(--border);
    font-size: 0.76rem;
    font-weight: 800;
    text-decoration: none;
}

.song-message {
    padding: clamp(1.5rem, 4vw, 2.4rem);
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: var(--surface);
    text-align: center;
}

.song-message.error {
    border-color: rgba(255, 154, 145, 0.35);
    background: rgba(255, 154, 145, 0.07);
}

.song-message strong {
    display: block;
    margin-bottom: 0.3rem;
}

.song-message p {
    margin-bottom: 0;
    color: var(--muted);
}

.song-message button {
    margin-top: 0.8rem;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--accent);
    border-radius: 0.55rem;
    color: #17100a;
    background: var(--accent);
    cursor: pointer;
    font-weight: 800;
}

.practice-guide {
    margin-bottom: clamp(5rem, 10vw, 8rem);
    padding: clamp(2rem, 5vw, 4rem);
    border: 1px solid rgba(243, 170, 51, 0.22);
    border-radius: 1.2rem;
    background:
        radial-gradient(circle at 88% 8%, rgba(243, 170, 51, 0.1), transparent 24rem),
        var(--surface);
}

.practice-guide-heading {
    max-width: 760px;
    margin-bottom: 2.3rem;
}

.practice-guide ol {
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    list-style: none;
}

.practice-guide li {
    padding: 0 1.2rem;
    border-right: 1px solid var(--border);
}

.practice-guide li:first-child {
    padding-left: 0;
}

.practice-guide li:last-child {
    padding-right: 0;
    border-right: 0;
}

.practice-guide li > span,
.practice-guide li strong {
    display: block;
}

.practice-guide li > span {
    margin-bottom: 1.3rem;
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 850;
}

.practice-guide li strong {
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
}

.practice-guide li p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 0.75rem;
}

/* Song rehearsal detail */
.song-detail-hero {
    padding: clamp(3.5rem, 7vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: clamp(2rem, 6vw, 5rem);
}

.back-to-catalogue {
    display: inline-flex;
    gap: 0.4rem;
    margin-bottom: 2rem;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 750;
    text-decoration: none;
}

.song-detail-heading > p:last-child {
    max-width: 740px;
    margin: 1.25rem 0 0;
    color: var(--muted);
}

.song-detail-metadata {
    min-width: 420px;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: rgba(17, 21, 25, 0.75);
    overflow: hidden;
}

.song-detail-metadata div {
    padding: 1rem 1.15rem;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.song-detail-metadata div:nth-child(even) {
    border-right: 0;
}

.song-detail-metadata div:nth-last-child(-n + 2) {
    border-bottom: 0;
}

.song-detail-metadata dt {
    color: var(--muted);
    font-size: 0.62rem;
    font-weight: 780;
    text-transform: uppercase;
}

.song-detail-metadata dd {
    margin: 0.15rem 0 0;
    color: var(--accent-light);
    font-size: 0.95rem;
    font-weight: 800;
}

.quick-song-search {
    position: relative;
    z-index: 10;
    margin-bottom: 1.2rem;
    padding: 1rem 1.2rem;
    display: grid;
    grid-template-columns: auto minmax(260px, 520px);
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border: 1px solid var(--border);
    border-radius: 0.9rem;
    background: var(--surface);
}

.quick-song-search > label {
    margin: 0;
    color: var(--text);
}

.detail-search-field {
    position: relative;
}

.detail-search-field > span {
    top: 1rem;
    bottom: auto;
}

.detail-search-results {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 0;
    left: 0;
    padding: 0.4rem;
    display: grid;
    gap: 0.15rem;
    border: 1px solid var(--border);
    border-radius: 0.7rem;
    background: rgba(12, 16, 19, 0.99);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.detail-search-results a,
.detail-search-results .search-empty {
    margin: 0;
    padding: 0.65rem 0.7rem;
    border-radius: 0.45rem;
    color: var(--muted);
    font-size: 0.78rem;
    text-decoration: none;
}

.detail-search-results a:hover {
    color: var(--text);
    background: var(--accent-soft);
}

.rehearsal-layout {
    padding-bottom: clamp(4rem, 8vw, 6rem);
    display: grid;
    grid-template-columns: minmax(340px, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: 1.2rem;
}

.practice-column {
    position: sticky;
    top: 9rem;
    display: grid;
    gap: 1.2rem;
}

.practice-panel,
.video-panel,
.lyrics-panel {
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: linear-gradient(145deg, rgba(23, 28, 33, 0.98), rgba(14, 17, 20, 0.98));
    overflow: hidden;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.16);
}

.panel-heading,
.lyrics-toolbar {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
}

.panel-heading.simple {
    display: block;
}

.panel-heading h2,
.lyrics-toolbar h2,
.video-panel h2 {
    font-size: 1.35rem;
}

.panel-heading .eyebrow,
.lyrics-toolbar .eyebrow {
    margin-bottom: 0.25rem;
    font-size: 0.62rem;
}

.panel-heading > button {
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    font-size: 0.68rem;
    font-weight: 750;
}

.panel-heading > button:hover {
    color: var(--text);
    background: var(--accent-soft);
}

.practice-speed {
    padding: 1rem 1.25rem 0;
}

.practice-speed select {
    min-height: 2.65rem;
}

.audio-part-list {
    padding: 1rem 1.25rem;
    display: grid;
    gap: 0.65rem;
}

.audio-part {
    min-width: 0;
    padding: 0.75rem;
    display: grid;
    grid-template-columns: minmax(110px, auto) minmax(0, 1fr);
    align-items: center;
    gap: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 0.7rem;
    background: rgba(5, 8, 10, 0.35);
}

.part-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.part-label span {
    width: 2rem;
    height: 2rem;
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #17100a;
    background: var(--accent);
    font-size: 0.62rem;
    font-weight: 900;
}

.part-label strong {
    font-size: 0.78rem;
}

.audio-part audio {
    min-width: 0;
    width: 100%;
    height: 2.25rem;
}

.practice-note {
    margin: 0;
    padding: 0 1.25rem 1.2rem;
    color: var(--muted);
    font-size: 0.67rem;
}

.practice-note span {
    margin-right: 0.35rem;
    color: var(--success);
}

.resource-empty {
    padding: 1.5rem;
    text-align: center;
}

.resource-empty strong {
    display: block;
    margin-bottom: 0.3rem;
}

.resource-empty p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.song-video-frame {
    position: relative;
    aspect-ratio: 16 / 9;
    background: #050607;
}

.song-video-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.lyrics-toolbar {
    background: var(--surface);
}

.font-controls {
    display: flex;
    gap: 0.3rem;
}

.font-controls button {
    min-width: 2.35rem;
    min-height: 2.35rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text);
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 800;
}

.font-controls button:hover {
    border-color: rgba(243, 170, 51, 0.35);
    background: var(--accent-soft);
}

.lyrics-sheet {
    min-height: 570px;
    padding: clamp(1.5rem, 4vw, 3rem);
    color: var(--paper-text);
    background:
        linear-gradient(rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.25)),
        var(--paper);
}

.lyrics-sheet pre {
    margin: 0;
    color: var(--paper-text);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 18px;
    line-height: 1.75;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.native-pdf-viewer {
    width: 100%;
    min-height: 650px;
    border: 1px solid rgba(36, 31, 25, 0.15);
    border-radius: 0.45rem;
    background: #fff;
}

.resource-empty.light {
    color: var(--paper-text);
}

.resource-empty.light p {
    color: #665d53;
}

.pdf-actions {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.pdf-actions a {
    padding: 0.6rem 0.75rem;
    border: 1px solid rgba(36, 31, 25, 0.2);
    border-radius: 0.5rem;
    color: #4d3714;
    background: rgba(255, 255, 255, 0.35);
    font-size: 0.72rem;
    font-weight: 800;
    text-decoration: none;
}

.song-sequence {
    margin-bottom: clamp(5rem, 10vw, 8rem);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1rem;
}

.song-sequence > a:not(.sequence-catalogue),
.sequence-placeholder {
    min-height: 5rem;
    padding: 1rem;
    display: flex;
    justify-content: center;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    color: var(--muted);
    background: var(--surface);
    text-decoration: none;
}

.song-sequence > a:not(.sequence-catalogue):hover {
    border-color: rgba(243, 170, 51, 0.32);
    background: var(--accent-soft);
}

.song-sequence a span {
    margin-bottom: 0.2rem;
    color: var(--accent);
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
}

.song-sequence a strong {
    color: var(--text);
    font-size: 0.82rem;
}

.song-sequence .next-song {
    align-items: flex-end;
    text-align: right;
}

.sequence-catalogue {
    padding: 0.65rem;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 800;
    text-decoration: none;
}

.sequence-placeholder {
    opacity: 0.5;
    font-size: 0.75rem;
}

.song-error-page {
    min-height: 65vh;
    padding-block: clamp(5rem, 12vw, 9rem);
    text-align: center;
}

.song-error-page h1 {
    max-width: 780px;
    margin-inline: auto;
}

.song-error-page > p:not(.eyebrow) {
    max-width: 620px;
    margin: 1.2rem auto 1.7rem;
    color: var(--muted);
}

.site-footer {
    border-top: 1px solid var(--border);
    background: #07090a;
}

.footer-shell {
    width: min(calc(100% - 2rem), var(--max-width));
    margin: 0 auto;
    padding: 2rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--muted);
    font-size: 0.77rem;
}

.footer-shell nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.back-to-top {
    position: fixed;
    right: clamp(1rem, 3vw, 2rem);
    bottom: clamp(1rem, 3vw, 2rem);
    z-index: 25;
    width: 2.9rem;
    height: 2.9rem;
    display: grid;
    place-items: center;
    border: 1px solid rgba(243, 170, 51, 0.55);
    border-radius: 50%;
    color: #17100a;
    background: var(--accent);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.38);
    transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.back-to-top:hover {
    color: #17100a;
    background: var(--accent-light);
    transform: translateY(-3px);
}

.back-to-top svg {
    width: 1.25rem;
    height: 1.25rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

@media (max-width: 1050px) {
    .desktop-nav a {
        padding-inline: 0.5rem;
    }

    .songbook-hero,
    .song-detail-hero {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .catalogue-overview,
    .song-detail-metadata {
        width: min(100%, 560px);
        min-width: 0;
    }

    .catalogue-controls {
        grid-template-columns: 1.4fr 1fr 1fr;
    }

    .clear-filters {
        grid-column: 1 / -1;
        width: fit-content;
    }

    .song-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .rehearsal-layout {
        grid-template-columns: 1fr;
    }

    .practice-column {
        position: static;
        grid-template-columns: 1fr 1fr;
    }

    .practice-column .practice-panel:only-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 900px) {
    .desktop-nav {
        display: none;
    }

    .mobile-nav {
        display: block;
    }

    .catalogue-heading {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .practice-guide ol {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1.5rem 0;
    }

    .practice-guide li:nth-child(2) {
        border-right: 0;
    }

    .practice-guide li:nth-child(3) {
        padding-left: 0;
    }
}

@media (max-width: 720px) {
    .section-nav {
        position: static;
    }

    .section-nav-shell {
        width: 100%;
        padding: 0.55rem 1rem;
        align-items: flex-start;
        flex-direction: column;
        gap: 0.35rem;
    }

    .section-nav-shell > div {
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.15rem;
    }

    .songbook-hero h1,
    .song-detail-hero h1,
    .song-error-page h1 {
        font-size: clamp(2.55rem, 13vw, 4rem);
    }

    .catalogue-overview {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .catalogue-controls {
        grid-template-columns: 1fr;
    }

    .clear-filters {
        grid-column: auto;
        width: 100%;
    }

    .song-grid {
        grid-template-columns: 1fr;
    }

    .catalogue-summary {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.2rem;
    }

    .quick-song-search {
        grid-template-columns: 1fr;
    }

    .practice-column {
        grid-template-columns: 1fr;
    }

    .audio-part {
        grid-template-columns: 1fr;
    }

    .lyrics-sheet {
        min-height: 440px;
        padding: 1.3rem;
    }

    .native-pdf-viewer {
        min-height: 520px;
    }

    .song-sequence {
        grid-template-columns: 1fr 1fr;
    }

    .sequence-catalogue {
        grid-column: 1 / -1;
        grid-row: 1;
        text-align: center;
    }

    .footer-shell {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .catalogue-overview div {
        padding: 0.9rem 0.7rem;
    }

    .catalogue-overview strong {
        font-size: 1.3rem;
    }

    .practice-guide ol {
        grid-template-columns: 1fr;
    }

    .practice-guide li,
    .practice-guide li:first-child,
    .practice-guide li:nth-child(3) {
        padding: 0 0 1rem;
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }

    .practice-guide li:last-child {
        padding-bottom: 0;
        border-bottom: 0;
    }

    .panel-heading,
    .lyrics-toolbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .font-controls {
        align-self: stretch;
    }

    .font-controls button {
        flex: 1;
    }

    .song-sequence {
        grid-template-columns: 1fr;
    }

    .sequence-catalogue {
        grid-column: auto;
        grid-row: auto;
    }

    .song-sequence .next-song {
        align-items: flex-start;
        text-align: left;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}