:root {
    color-scheme: light;
    --bg: #f6f8fb;
    --panel: #ffffff;
    --text: #172033;
    --muted: #6c788d;
    --line: #dbe2ec;
    --primary: #1264d8;
    --primary-dark: #0b47a4;
    --accent: #14a77d;
    --danger: #d93b4a;
    --shadow: 0 18px 50px rgba(23, 32, 51, 0.09);
    --site-bg-image: url("../images/school-bg.png");
    --site-bg-position: center;
    --site-bg-attachment: fixed;
    --site-overlay-alpha: 0.90;
    --panel-alpha: 0.88;
}

* {
    box-sizing: border-box;
}

html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        linear-gradient(180deg, rgba(246 248 251 / var(--site-overlay-alpha)), rgba(246 248 251 / var(--site-overlay-alpha))),
        radial-gradient(circle at top left, rgba(18, 100, 216, 0.2), transparent 34rem),
        var(--site-bg-image) var(--site-bg-position) / cover var(--site-bg-attachment) no-repeat,
        var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(255 255 255 / var(--site-overlay-alpha)), rgba(255 255 255 / var(--site-overlay-alpha))),
        radial-gradient(circle at 70% 20%, rgba(20, 167, 125, 0.12), transparent 26rem);
    backdrop-filter: blur(1px);
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select {
    font: inherit;
    max-width: 100%;
}

button {
    cursor: pointer;
    border: 0;
}

.shell {
    position: relative;
    z-index: 1;
    width: min(1120px, 100%);
    max-width: 100%;
    margin: 0 auto;
    padding: 22px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 18px;
}

.topbar > div,
.topbar nav,
.player-window > div,
.manager-group,
.section-head > *,
.user-item > *,
.update-head > *,
.license-grid > div {
    min-width: 0;
}

.topbar > div {
    flex: 1 1 320px;
}

img {
    max-width: 100%;
}

.topbar h1,
.login-panel h1 {
    margin: 4px 0 0;
    font-size: clamp(24px, 4.6vw, 42px);
    letter-spacing: 0;
    overflow-wrap: anywhere;
}

.topbar nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
    margin-left: auto;
}

.account-nav {
    gap: 0;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.76);
    background: rgba(255, 255, 255, 0.68);
    box-shadow: 0 10px 28px rgba(23, 32, 51, 0.06);
}

.welcome-pill {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    flex: 1 1 200px;
    max-width: 100%;
    border-radius: 0;
    padding: 0 12px;
    background: transparent;
    border: 0;
    color: #34445f;
    font-weight: 800;
    font-size: 14px;
    overflow-wrap: anywhere;
    text-align: left;
}

.brand-logo {
    display: block;
    width: min(520px, 100%);
    max-height: 96px;
    object-fit: contain;
    object-position: left center;
    margin-bottom: 8px;
}

.header-logo {
    width: min(360px, 62vw);
    max-height: 74px;
}

.login-logo {
    width: min(620px, 100%);
    max-height: 130px;
    margin-bottom: 18px;
    filter: drop-shadow(0 12px 22px rgba(23, 32, 51, 0.14));
}

.eyebrow {
    margin: 0;
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.muted,
.hint {
    color: var(--muted);
}

.ghost,
.secondary,
.primary,
.danger-btn {
    min-height: 44px;
    border-radius: 8px;
    padding: 0 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.ghost {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--line);
}

.account-logout {
    min-width: 74px;
    border: 0;
    border-left: 1px solid rgba(219, 226, 236, 0.92);
    border-radius: 0;
    background: rgba(255, 255, 255, 0.78);
}

.primary {
    background: var(--primary);
    color: white;
}

.primary:active {
    background: var(--primary-dark);
}

.secondary {
    background: white;
    border: 1px solid var(--line);
    color: var(--text);
}

.danger-btn {
    background: #fff0f2;
    color: var(--danger);
}

.login-panel {
    min-height: calc(100vh - 44px);
    display: grid;
    align-items: center;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
}

.login-screen {
    min-height: calc(100vh - 44px);
    grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
    align-content: center;
    gap: clamp(22px, 5vw, 64px);
}

.login-screen > div {
    display: grid;
    align-content: center;
    min-width: 0;
}

.login-screen .form-card {
    align-self: center;
}

.form-card,
.player-window,
.tool-panel,
.temp-library,
.now-playing,
.user-list,
.user-item {
    background: rgba(255 255 255 / var(--panel-alpha));
    border: 1px solid rgba(255, 255, 255, 0.76);
    border-radius: 8px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.player-window {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
    padding: 14px 16px;
    margin-bottom: 16px;
}

.player-window::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
    background: linear-gradient(120deg, transparent 16%, rgba(255, 255, 255, 0.42) 36%, transparent 56%);
    transform: translateX(-100%);
}

.player-window::before {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 8px;
    height: 8px;
    border-radius: 999px;
    background:
        radial-gradient(circle, rgba(18, 100, 216, 0.78) 0 38%, transparent 42%) 0 0 / 32px 8px repeat-x,
        linear-gradient(90deg, rgba(18, 100, 216, 0.12), rgba(20, 167, 125, 0.12));
    opacity: 0.42;
    pointer-events: none;
}

.player-window.is-playing::after {
    opacity: 1;
    animation: panel-shine 3.8s ease-in-out infinite;
}

.player-window.is-playing::before {
    animation: light-bounce 0.9s ease-in-out infinite alternate;
    opacity: 0.86;
}

.player-art {
    position: relative;
    width: 88px;
    aspect-ratio: 1;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background:
        linear-gradient(135deg, rgba(18, 100, 216, 0.95), rgba(20, 167, 125, 0.9)),
        #1264d8;
    color: white;
    box-shadow: 0 14px 34px rgba(18, 100, 216, 0.22);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.player-art::before,
.player-art::after {
    content: "";
    position: absolute;
    width: 72%;
    height: 72%;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.28);
    transform: scale(0.55);
    opacity: 0;
}

.player-window.is-playing .player-art {
    transform: translateY(-1px);
    box-shadow: 0 18px 42px rgba(18, 100, 216, 0.28);
}

.player-window.is-playing .player-art::before {
    animation: sound-ring 1.7s ease-out infinite;
}

.player-window.is-playing .player-art::after {
    animation: sound-ring 1.7s ease-out 0.55s infinite;
}

.player-window.is-paused .player-art {
    background:
        linear-gradient(135deg, rgba(108, 120, 141, 0.95), rgba(18, 100, 216, 0.72)),
        #6c788d;
}

.player-art .status-dot {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.85);
}

#playerIcon {
    position: relative;
    z-index: 1;
    font-size: 28px;
    font-weight: 900;
}

.player-main {
    min-width: 0;
}

.player-main h2 {
    margin: 4px 0;
    font-size: clamp(18px, 4vw, 30px);
    overflow-wrap: anywhere;
}

.player-main .eyebrow,
.player-main .muted,
.tool-panel p,
.hint,
.muted,
.site-footer,
.license-grid span,
.update-files span {
    overflow-wrap: anywhere;
}

.quick-tools {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 18px 0 14px;
}

.tool-panel,
.temp-library {
    padding: 16px;
}

.tool-panel h2,
.section-head h2 {
    margin: 0;
    font-size: 20px;
}

textarea {
    width: 100%;
    min-height: 104px;
    resize: vertical;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 12px;
    color: var(--text);
    background: white;
    font: inherit;
}

.tool-panel {
    display: grid;
    gap: 12px;
}

.section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin: 18px 0 10px;
}

.temp-library {
    margin-bottom: 16px;
}

.temp-board {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 2px;
    max-width: 100%;
}

.temp-item {
    min-width: 260px;
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 10px;
    align-items: center;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
}

.temp-item strong,
.temp-item span {
    display: block;
}

.temp-item span,
.empty-line {
    color: var(--muted);
    font-size: 13px;
}

.empty-line {
    min-height: 34px;
    display: flex;
    align-items: center;
}

.compact-library {
    padding: 12px;
}

.compact-library .section-head {
    margin: 0 0 8px;
}

.remember-line {
    display: flex;
    grid-template-columns: none;
    align-items: center;
    gap: 8px;
    color: var(--text);
}

.remember-line input {
    width: auto;
    min-height: auto;
}

.is-hidden {
    display: none;
}

.site-footer {
    margin-top: 28px;
    padding: 18px 0 4px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 16px;
    color: rgba(108, 120, 141, 0.72);
    font-size: 12px;
}

.site-footer a {
    color: rgba(108, 120, 141, 0.78);
}

.fixed-note {
    display: grid;
    gap: 6px;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid rgba(219, 226, 236, 0.9);
    background: rgba(255, 255, 255, 0.66);
    color: var(--muted);
}

.fixed-note strong {
    color: var(--text);
}

.topbar .ghost {
    flex: 0 0 auto;
}

.settings-card {
    grid-column: 1 / -1;
}

.single-page-card {
    max-width: 920px;
    margin: 0 auto;
}

.admin-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.admin-menu a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--line);
    color: var(--text);
    font-weight: 700;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.admin-menu a:hover {
    transform: translateY(-2px);
    border-color: rgba(18, 100, 216, 0.42);
    box-shadow: 0 12px 34px rgba(18, 100, 216, 0.12);
}

.admin-menu strong {
    font-size: 14px;
}

.admin-menu span {
    color: var(--muted);
    font-size: 12px;
    overflow-wrap: anywhere;
}

.admin-page-grid {
    display: grid;
    grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
    gap: 18px;
}

.form-card {
    display: grid;
    gap: 14px;
    padding: 22px;
    min-width: 0;
}

.form-card h2,
.user-list h2 {
    margin: 0 0 6px;
}

.search-input {
    margin-bottom: 4px;
}

label {
    display: grid;
    gap: 8px;
    color: var(--muted);
    font-weight: 700;
}

input,
select {
    width: 100%;
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 0 12px;
    color: var(--text);
    background: white;
}

.toast {
    margin-bottom: 14px;
    padding: 12px 14px;
    border-radius: 8px;
    background: #fff7df;
    color: #7b5817;
    border: 1px solid #f1d891;
}

.license-panel,
.license-grid {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.82);
    border-radius: 8px;
    box-shadow: 0 10px 28px rgba(23, 32, 51, 0.06);
}

.license-panel {
    display: grid;
    gap: 10px;
    padding: 18px;
    margin-top: 18px;
}

.license-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 12px;
}

.license-actions .primary {
    text-align: center;
}

.license-panel strong,
.license-grid strong {
    color: var(--text);
}

.license-panel code,
.license-grid code {
    display: inline-block;
    width: fit-content;
    max-width: 100%;
    padding: 10px 12px;
    background: #f2f7ff;
    border-radius: 8px;
    color: var(--primary-dark);
    overflow-wrap: anywhere;
}

.license-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    padding: 18px;
}

.license-grid div {
    display: grid;
    gap: 8px;
}

.now-playing {
    display: grid;
    grid-template-columns: 1.2fr 1fr auto;
    gap: 18px;
    align-items: center;
    padding: 18px;
    margin-bottom: 16px;
}

.now-playing h2 {
    margin: 4px 0;
    font-size: 24px;
    overflow-wrap: anywhere;
}

.status-dot {
    width: 10px;
    height: 10px;
    display: inline-block;
    border-radius: 50%;
    background: #9aa5b5;
    box-shadow: 0 0 0 6px rgba(154, 165, 181, 0.13);
}

.status-dot.playing {
    background: var(--accent);
    box-shadow: 0 0 0 6px rgba(20, 167, 125, 0.14);
    animation: dot-pulse 1.4s ease-in-out infinite;
}

.progress-wrap {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.progress-slider {
    width: 100%;
    height: 14px;
    margin: 0;
    padding: 0;
    appearance: none;
    background: transparent;
}

.progress-slider::-webkit-slider-runnable-track {
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, #dbe7fb, #e7edf5);
}

.progress-slider::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    margin-top: -4px;
    border-radius: 50%;
    background: #1264d8;
    border: 2px solid #ffffff;
    box-shadow: 0 4px 12px rgba(18, 100, 216, 0.24);
}

.progress-slider::-moz-range-track {
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, #dbe7fb, #e7edf5);
}

.progress-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #1264d8;
    border: 2px solid #ffffff;
    box-shadow: 0 4px 12px rgba(18, 100, 216, 0.24);
}

.progress-slider.is-live::-webkit-slider-thumb,
.progress-slider.is-live::-moz-range-thumb {
    background: #14a77d;
}

.progress-slider:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.time-row,
.volume span {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    color: var(--muted);
    font-size: 13px;
    gap: 6px 12px;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.control-btn {
    min-width: 56px;
    height: 44px;
    border-radius: 8px;
    background: #edf4ff;
    color: var(--primary);
    font-weight: 900;
    padding: 0 14px;
    box-shadow: 0 8px 20px rgba(18, 100, 216, 0.08);
    transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.control-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(18, 100, 216, 0.14);
}

.control-btn:active {
    transform: translateY(1px);
}

.control-btn.danger {
    background: #fff0f2;
    color: var(--danger);
    box-shadow: 0 8px 20px rgba(217, 59, 74, 0.08);
}

.volume {
    grid-column: 1 / -1;
}

.manager-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    padding: 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.52);
    border: 1px solid rgba(255, 255, 255, 0.68);
    backdrop-filter: blur(12px);
}

.manager-row select {
    display: none;
}

.manager-group {
    display: inline-flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 8px;
    padding: 6px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.74);
    border: 1px solid rgba(219, 226, 236, 0.9);
    overflow-x: auto;
}

.manager-group > span {
    padding: 0 8px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 900;
    white-space: nowrap;
}

.manager-group .secondary,
.manager-group .danger-btn {
    white-space: nowrap;
    flex: 0 0 auto;
    padding: 0 12px;
    font-size: 14px;
}

.category-tabs {
    display: flex;
    gap: 10px;
    margin: 10px 0 18px;
    min-width: 0;
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x proximity;
}

.category-tab {
    flex: 0 0 auto;
    min-width: 120px;
    min-height: 58px;
    border-radius: 8px;
    padding: 10px 12px;
    background: rgba(255 255 255 / var(--panel-alpha));
    border: 1px solid rgba(255, 255, 255, 0.78);
    box-shadow: 0 8px 28px rgba(23, 32, 51, 0.06);
    color: var(--text);
    text-align: left;
    display: grid;
    align-content: space-between;
    backdrop-filter: blur(12px);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
    scroll-snap-align: start;
}

.category-tab strong,
.category-tab span {
    display: block;
    white-space: nowrap;
}

.category-tab span {
    color: var(--muted);
    font-size: 11px;
}

.category-tab.active {
    border-color: rgba(18, 100, 216, 0.72);
    background: rgba(237, 244, 255, 0.92);
    box-shadow: 0 10px 34px rgba(18, 100, 216, 0.14);
}

.category-tab:hover,
.audio-button:hover,
.temp-item:hover {
    transform: translateY(-2px);
}

.audio-board {
    display: grid;
    gap: 18px;
}

.category-section {
    display: grid;
    gap: 10px;
}

.category-title {
    margin: 0;
    color: #33435c;
    font-size: 18px;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(142px, 1fr));
    gap: 12px;
    min-width: 0;
}

.audio-button {
    width: 100%;
    min-height: 92px;
    border-radius: 8px;
    padding: 14px;
    background: var(--panel);
    border: 1px solid var(--line);
    box-shadow: 0 8px 28px rgba(23, 32, 51, 0.06);
    color: var(--text);
    display: grid;
    align-content: space-between;
    text-align: left;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.audio-button strong {
    overflow-wrap: anywhere;
}

.audio-button span {
    color: var(--muted);
    font-size: 12px;
}

.audio-button.empty {
    border-style: dashed;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.62);
}

.audio-button.add-card,
.category-tab.add-card {
    border-style: dashed;
    border-color: rgba(18, 100, 216, 0.36);
    background:
        linear-gradient(180deg, rgba(245, 249, 255, 0.98), rgba(255, 255, 255, 0.9));
    color: var(--primary-dark);
}

.audio-button.add-card {
    place-items: center;
    text-align: center;
    gap: 4px;
}

.audio-button.add-card strong,
.category-tab.add-card strong {
    font-size: 28px;
    line-height: 1;
    font-weight: 700;
}

.audio-button.add-card span,
.category-tab.add-card span {
    color: #587192;
}

.audio-button.active {
    border-color: rgba(18, 100, 216, 0.7);
    box-shadow: 0 10px 34px rgba(18, 100, 216, 0.16);
    background:
        linear-gradient(180deg, rgba(237, 244, 255, 0.96), rgba(255, 255, 255, 0.94));
    animation: active-button 2s ease-in-out infinite;
    color: var(--primary-dark);
}

.admin-grid {
    display: grid;
    grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
    gap: 18px;
}

.checks {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.checks label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text);
}

.checks input {
    width: auto;
    min-height: auto;
}

.user-list {
    padding: 18px;
    display: grid;
    gap: 12px;
    min-width: 0;
}

.user-item {
    box-shadow: none;
    padding: 14px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr) 130px;
    gap: 10px;
    align-items: center;
}

.user-item span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.compact {
    grid-column: 1 / -1;
}

.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    grid-column: 1 / -1;
}

.update-card {
    gap: 16px;
}

.update-card form {
    display: grid;
    gap: 12px;
}

.update-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.update-head p {
    margin: 8px 0 0;
}

.version-pill,
.update-files strong,
.update-files span {
    border-radius: 999px;
}

.update-progress-card {
    display: grid;
    gap: 12px;
    padding: 14px;
    border-radius: 8px;
    border: 1px solid rgba(219, 226, 236, 0.9);
    background: rgba(255, 255, 255, 0.66);
}

.update-progress-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.progress-meter {
    height: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: #e8edf5;
}

.progress-meter i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.25s ease;
}

.version-pill {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    padding: 0 14px;
    background: rgba(18, 100, 216, 0.1);
    color: var(--primary);
    font-weight: 800;
    white-space: nowrap;
}

.update-files {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    min-width: 0;
}

.update-files strong {
    padding: 8px 12px;
    background: rgba(23, 32, 51, 0.06);
    color: var(--text);
}

.update-files span {
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid var(--line);
    color: var(--muted);
    overflow-wrap: anywhere;
    max-width: 100%;
}

@media (max-width: 980px) {
    .admin-grid {
        grid-template-columns: 1fr;
    }

    .admin-page-grid {
        grid-template-columns: 1fr;
    }

    .player-window {
        grid-template-columns: 72px minmax(0, 1fr) auto;
    }

    .controls {
        grid-column: auto;
    }

    .topbar {
        align-items: flex-start;
    }

    .topbar nav {
        width: 100%;
        justify-content: flex-start;
        margin-left: 0;
    }

    .welcome-pill {
        flex: 1 1 auto;
    }
}

@media (max-width: 760px) {
    body {
        background:
            linear-gradient(180deg, rgba(246 248 251 / var(--site-overlay-alpha)), rgba(246 248 251 / var(--site-overlay-alpha))),
            var(--site-bg-image) var(--site-bg-position) / auto 100vh var(--site-bg-attachment) no-repeat,
            var(--bg);
    }

    .shell {
        padding: 16px;
    }

    .login-panel,
    .admin-grid,
    .now-playing,
    .quick-tools {
        grid-template-columns: 1fr;
    }

    .login-screen {
        min-height: calc(100vh - 24px);
        align-content: center;
        gap: 16px;
    }

    .login-screen .login-logo {
        max-height: 72px;
        margin-bottom: 8px;
    }

    .login-screen .form-card {
        padding: 16px;
        gap: 12px;
    }

    .player-window {
        grid-template-columns: 64px minmax(0, 1fr);
        gap: 10px;
        padding: 12px;
    }

    .player-art {
        width: 64px;
        max-height: none;
        aspect-ratio: 1;
        align-self: start;
    }

    .topbar {
        align-items: flex-start;
    }

    .topbar nav {
        width: 100%;
        justify-content: flex-start;
    }

    .account-nav {
        width: 100%;
    }

    .header-logo {
        width: min(300px, 68vw);
        max-height: 54px;
    }

    .login-logo {
        max-height: 92px;
    }

    .manager-row {
        align-items: stretch;
    }

    .manager-group {
        width: 100%;
        display: flex;
        flex-wrap: nowrap;
    }

    .manager-group:nth-of-type(2) {
        display: flex;
    }

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

    .user-item {
        grid-template-columns: 1fr;
    }

    .update-head {
        flex-direction: column;
    }

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

    .temp-item {
        min-width: 0;
        width: 100%;
        grid-template-columns: 1fr 66px 66px;
    }

    .player-main h2 {
        font-size: 18px;
    }

    .controls {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .control-btn {
        width: 100%;
        min-width: 0;
    }
}

@keyframes dot-pulse {
    0%,
    100% {
        box-shadow: 0 0 0 6px rgba(20, 167, 125, 0.14);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(20, 167, 125, 0.04);
    }
}

@keyframes sound-ring {
    0% {
        opacity: 0.5;
        transform: scale(0.55);
    }
    100% {
        opacity: 0;
        transform: scale(1.35);
    }
}

@keyframes panel-shine {
    0% {
        transform: translateX(-100%);
    }
    45%,
    100% {
        transform: translateX(100%);
    }
}

@keyframes active-button {
    0%,
    100% {
        box-shadow: 0 10px 34px rgba(18, 100, 216, 0.16);
    }
    50% {
        box-shadow: 0 14px 38px rgba(20, 167, 125, 0.16);
    }
}

@keyframes light-bounce {
    0% {
        background-position: 0 0, 0 0;
        filter: saturate(1);
    }
    100% {
        background-position: 16px 0, 0 0;
        filter: saturate(1.35);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

/* Final polish: cleaner responsive layout for control room and phone use. */
.shell {
    width: min(1180px, 100%);
    padding: clamp(14px, 2.4vw, 24px);
}

.topbar {
    gap: 14px 18px;
    margin-bottom: 14px;
}

.topbar > div {
    display: grid;
    gap: 4px;
    flex: 1 1 420px;
}

.topbar h1,
.login-panel h1 {
    font-size: clamp(24px, 3.2vw, 38px);
    line-height: 1.12;
}

.brand-logo {
    margin-bottom: 2px;
}

.header-logo {
    width: min(330px, 58vw);
    max-height: 62px;
}

.account-nav {
    flex: 0 1 330px;
    min-width: min(100%, 260px);
    height: 46px;
    align-self: center;
}

.welcome-pill {
    height: 46px;
    min-height: 46px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.account-logout {
    height: 46px;
    min-height: 46px;
}

.player-window {
    grid-template-columns: 96px minmax(0, 1fr) minmax(190px, auto);
    gap: 16px;
    padding: 16px 18px 22px;
    border-color: rgba(255, 255, 255, 0.86);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(248, 252, 255, 0.78)),
        rgba(255 255 255 / var(--panel-alpha));
}

.player-window::before {
    left: 18px;
    right: 18px;
    bottom: 9px;
}

.player-art {
    width: 96px;
    box-shadow: 0 16px 34px rgba(18, 100, 216, 0.24);
}

.player-main {
    align-self: stretch;
    display: grid;
    align-content: center;
    gap: 4px;
}

.player-main .eyebrow {
    color: #0f5ec9;
}

.player-main h2 {
    margin: 0;
    line-height: 1.16;
}

.player-main > .muted {
    margin: 0 0 4px;
    font-weight: 700;
}

.progress-wrap {
    gap: 6px;
}

.controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(54px, 1fr));
    align-self: center;
    min-width: 0;
}

.control-btn {
    width: 100%;
    min-width: 0;
    padding: 0 10px;
}

.volume {
    margin-top: 2px;
}

.manager-row {
    margin: 0 0 10px;
    padding: 8px;
}

.category-tabs {
    margin: 8px -2px 12px;
    padding: 2px 2px 8px;
}

.category-tab {
    min-width: 104px;
    min-height: 52px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.76);
    border-color: rgba(219, 226, 236, 0.92);
}

.category-tab strong {
    font-size: 14px;
}

.category-tab.active {
    color: var(--primary-dark);
    background: linear-gradient(180deg, rgba(237, 244, 255, 0.98), rgba(255, 255, 255, 0.94));
}

.category-tab.add-card {
    min-width: 74px;
    justify-items: center;
    text-align: center;
}

.section-head {
    margin: 10px 0 10px;
}

.section-head h2 {
    font-size: clamp(18px, 2.5vw, 22px);
}

.button-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
}

.audio-button {
    min-height: 86px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.88);
}

.audio-button strong {
    line-height: 1.25;
}

.audio-button.active {
    border-color: rgba(20, 167, 125, 0.72);
    background:
        linear-gradient(180deg, rgba(232, 250, 244, 0.96), rgba(255, 255, 255, 0.94));
    color: #0d6b54;
}

.quick-tools {
    margin-top: 12px;
}

.tool-panel,
.temp-library,
.form-card,
.user-list {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.78)),
        rgba(255 255 255 / var(--panel-alpha));
}

.admin-menu {
    padding: 8px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.52);
    border: 1px solid rgba(255, 255, 255, 0.68);
}

.admin-menu a {
    box-shadow: none;
}

.admin-page-grid {
    align-items: start;
}

.single-page-card {
    max-width: 980px;
}

.user-list {
    max-height: min(720px, calc(100vh - 190px));
    overflow-y: auto;
}

.user-item {
    background: rgba(255, 255, 255, 0.78);
}

@media (max-width: 900px) {
    .player-window {
        grid-template-columns: 82px minmax(0, 1fr);
    }

    .controls {
        grid-column: 1 / -1;
    }

    .volume {
        grid-column: 1 / -1;
    }
}

@media (max-width: 760px) {
    .shell {
        padding: 12px;
    }

    .topbar {
        gap: 10px;
        margin-bottom: 10px;
    }

    .topbar > div {
        flex-basis: 100%;
    }

    .topbar h1,
    .login-panel h1 {
        font-size: 23px;
    }

    .header-logo {
        width: min(280px, 72vw);
        max-height: 50px;
    }

    .account-nav {
        flex-basis: 100%;
        min-width: 0;
    }

    .player-window {
        grid-template-columns: 58px minmax(0, 1fr);
        gap: 10px;
        padding: 11px 12px 20px;
        margin-bottom: 10px;
    }

    .player-art {
        width: 58px;
    }

    #playerIcon {
        font-size: 22px;
    }

    .player-main h2 {
        font-size: 17px;
        line-height: 1.22;
    }

    .player-main .eyebrow {
        font-size: 11px;
    }

    .controls {
        gap: 7px;
    }

    .control-btn {
        height: 42px;
        font-size: 14px;
    }

    .manager-row {
        padding: 7px;
    }

    .manager-group {
        padding: 5px;
        gap: 6px;
    }

    .manager-group .secondary,
    .manager-group .danger-btn {
        min-height: 38px;
        font-size: 13px;
        padding: 0 10px;
    }

    .category-tabs {
        gap: 8px;
        margin-bottom: 8px;
    }

    .category-tab {
        min-width: 94px;
        min-height: 48px;
    }

    .button-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .audio-button {
        min-height: 80px;
        padding: 10px;
    }

    .audio-button strong {
        font-size: 14px;
    }

    .quick-tools {
        gap: 10px;
    }

    .tool-panel,
    .temp-library,
    .form-card,
    .user-list {
        padding: 14px;
    }

    .user-list {
        max-height: none;
    }
}

/* 2026.05 mobile premium pass: compact control surface, stable logo boxes, one-screen login. */
.topbar .brand-logo.header-logo {
    width: min(330px, 58vw);
    height: 58px;
    max-height: none;
    object-fit: contain;
    object-position: left center;
}

.login-logo {
    height: clamp(74px, 13vw, 116px);
    max-height: none;
    object-fit: contain;
    object-position: left center;
}

body.login-page {
    min-height: 100dvh;
    overflow: hidden;
}

body.login-page .shell {
    min-height: 100dvh;
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
    padding-top: clamp(10px, 2vh, 22px);
    padding-bottom: clamp(8px, 1.6vh, 14px);
}

body.login-page .login-screen {
    min-height: 0;
    align-self: center;
}

body.login-page .site-footer {
    margin-top: 8px;
    padding: 4px 0 0;
    gap: 5px 12px;
    font-size: 11px;
}

.manager-row {
    justify-content: space-between;
    box-shadow: 0 10px 28px rgba(23, 32, 51, 0.05);
}

.manager-group {
    background: rgba(255, 255, 255, 0.86);
}

.manager-group > span {
    color: #40516d;
}

.update-detail-grid {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px 10px;
    align-items: start;
}

.update-detail-grid > span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
    white-space: nowrap;
}

.update-detail-grid > strong {
    min-width: 0;
    color: #223047;
    font-weight: 700;
    overflow-wrap: anywhere;
}

.update-card .inline-actions + .inline-actions {
    margin-top: -6px;
}

@media (max-width: 760px) {
    .shell {
        padding: 10px;
    }

    .topbar {
        gap: 7px;
        margin-bottom: 8px;
    }

    .topbar .brand-logo.header-logo {
        width: min(250px, 70vw);
        height: 42px;
        margin-bottom: 1px;
    }

    .topbar h1 {
        font-size: 24px;
        line-height: 1.08;
        margin-top: 0;
    }

    .account-nav {
        height: 40px;
    }

    .welcome-pill,
    .account-logout {
        height: 40px;
        min-height: 40px;
        font-size: 13px;
    }

    .account-logout {
        min-width: 62px;
    }

    .player-window {
        grid-template-columns: 48px minmax(0, 1fr);
        gap: 8px 10px;
        padding: 10px 10px 15px;
        margin-bottom: 8px;
        border-radius: 10px;
    }

    .player-window::before {
        left: 10px;
        right: 10px;
        bottom: 5px;
        height: 5px;
        background:
            radial-gradient(circle, rgba(18, 100, 216, 0.7) 0 38%, transparent 42%) 0 0 / 28px 5px repeat-x,
            linear-gradient(90deg, rgba(18, 100, 216, 0.08), rgba(20, 167, 125, 0.1));
    }

    .player-art {
        width: 48px;
        border-radius: 10px;
    }

    .player-art .status-dot {
        top: 7px;
        right: 7px;
        width: 7px;
        height: 7px;
    }

    #playerIcon {
        font-size: 19px;
    }

    .player-main {
        gap: 2px;
    }

    .player-main h2 {
        font-size: 16px;
        line-height: 1.15;
        max-height: 38px;
        overflow: hidden;
    }

    .player-main > .muted {
        font-size: 15px;
        margin-bottom: 2px;
    }

    .progress-wrap {
        gap: 4px;
    }

    .progress-slider {
        height: 11px;
    }

    .progress-slider::-webkit-slider-runnable-track {
        height: 7px;
    }

    .progress-slider::-webkit-slider-thumb {
        width: 15px;
        height: 15px;
        margin-top: -4px;
    }

    .time-row,
    .volume span {
        font-size: 11px;
    }

    .controls {
        gap: 6px;
    }

    .control-btn {
        height: 36px;
        min-height: 36px;
        font-size: 13px;
        border-radius: 8px;
    }

    .volume {
        margin-top: 0;
    }

    .volume input {
        min-height: 28px;
    }

    .manager-row {
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 7px;
        padding: 5px;
        margin-bottom: 6px;
        border-radius: 10px;
    }

    .manager-group {
        flex: 0 0 auto;
        gap: 4px;
        padding: 4px;
        border-radius: 9px;
    }

    .manager-group > span {
        padding: 0 5px;
        font-size: 12px;
    }

    .manager-group .secondary,
    .manager-group .danger-btn {
        min-height: 32px;
        height: 32px;
        padding: 0 8px;
        font-size: 12px;
        border-radius: 8px;
    }

    .category-tabs {
        gap: 7px;
        margin: 4px -10px 8px;
        padding: 2px 10px 8px;
    }

    .category-tab {
        min-width: 88px;
        min-height: 46px;
        padding: 7px 9px;
        border-radius: 10px;
    }

    .category-tab strong {
        font-size: 14px;
        max-width: 86px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .category-tab.add-card strong {
        font-size: 24px;
        max-width: none;
    }

    .section-head {
        margin: 8px 0 8px;
    }

    .section-head h2 {
        font-size: 22px;
    }

    .section-head .muted {
        display: none;
    }

    .button-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .audio-button {
        min-height: 72px;
        padding: 10px;
        border-radius: 10px;
    }

    .audio-button strong {
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        overflow-wrap: anywhere;
    }

    .audio-button.add-card strong {
        display: block;
        font-size: 24px;
        line-height: 1;
    }

    .audio-button span {
        font-size: 11px;
    }

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

    .site-footer {
        margin-top: 18px;
        padding-bottom: 2px;
        gap: 8px 12px;
        font-size: 11px;
    }

    .update-card {
        gap: 12px;
    }

    .update-head {
        gap: 8px;
    }

    .update-head h2 {
        margin-bottom: 0;
    }

    .update-head p {
        display: none;
    }

    .version-pill {
        min-height: 32px;
        padding: 0 10px;
        font-size: 12px;
    }

    .update-progress-card {
        padding: 12px;
        border-radius: 10px;
    }

    .update-detail-grid {
        grid-template-columns: 48px minmax(0, 1fr);
        gap: 7px 8px;
    }

    .update-detail-grid > span,
    .update-detail-grid > strong {
        font-size: 12px;
    }

    .fixed-note {
        padding: 10px;
        font-size: 12px;
    }

    .update-card .primary,
    .update-card .secondary {
        min-height: 44px;
        font-size: 15px;
    }

    body.login-page .shell {
        padding: 8px 12px 7px;
    }

    body.login-page .login-screen {
        grid-template-columns: 1fr;
        gap: 10px;
        align-content: center;
    }

    body.login-page .login-screen > div {
        justify-items: center;
        text-align: center;
    }

    body.login-page .login-logo {
        width: min(300px, 82vw);
        height: 54px;
        margin-bottom: 4px;
        object-position: center;
    }

    body.login-page .login-panel h1 {
        font-size: clamp(22px, 7vw, 30px);
        line-height: 1.08;
        margin: 0;
    }

    body.login-page .form-card {
        padding: 13px;
        gap: 9px;
        width: 100%;
        max-width: 390px;
        justify-self: center;
    }

    body.login-page label {
        gap: 5px;
        font-size: 13px;
    }

    body.login-page input {
        min-height: 40px;
        padding: 0 11px;
    }

    body.login-page .remember-line {
        min-height: 22px;
        font-size: 12px;
    }

    body.login-page .primary {
        min-height: 42px;
        margin-top: 2px;
    }

    body.login-page .site-footer {
        margin-top: 4px;
        padding: 0;
        font-size: 10px;
        line-height: 1.25;
    }
}

@media (max-width: 380px) {
    .topbar h1 {
        font-size: 21px;
    }

    body.login-page .login-logo {
        height: 46px;
    }

    body.login-page .login-panel h1 {
        font-size: 21px;
    }

    body.login-page .form-card {
        padding: 11px;
        gap: 7px;
    }

    body.login-page input {
        min-height: 37px;
    }
}

/* 2026.05 service page and flatter mobile player pass. */
.service-card {
    gap: 16px;
}

.service-status-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.service-status-grid div {
    min-width: 0;
    display: grid;
    gap: 5px;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(219, 226, 236, 0.9);
    background: rgba(255, 255, 255, 0.7);
}

.service-status-grid span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
}

.service-status-grid strong {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: 14px;
}

.service-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.service-actions form {
    margin: 0;
}

@media (max-width: 760px) {
    .player-window {
        grid-template-columns: 46px minmax(0, 1fr);
        padding: 9px 8px 10px;
        gap: 7px 9px;
    }

    .player-window::before,
    .player-window::after {
        display: none;
    }

    .player-window.is-playing::before,
    .player-window.is-playing::after {
        animation: none;
    }

    .player-art {
        width: 46px;
        box-shadow: 0 8px 18px rgba(18, 100, 216, 0.16);
    }

    .player-window.is-playing .player-art {
        transform: none;
        box-shadow: 0 10px 20px rgba(18, 100, 216, 0.18);
    }

    .player-main {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: 2px;
    }

    .player-main h2 {
        font-size: 16px;
        max-height: 22px;
        white-space: nowrap;
        text-overflow: ellipsis;
    }

    .player-main > .muted {
        font-size: 13px;
    }

    .progress-wrap {
        grid-column: 1 / -1;
        margin-top: 4px;
    }

    .progress-slider,
    .volume input {
        width: 100%;
    }

    .progress-slider::-webkit-slider-runnable-track {
        height: 6px;
    }

    .progress-slider::-webkit-slider-thumb {
        width: 14px;
        height: 14px;
    }

    .controls {
        grid-column: 1 / -1;
        gap: 6px;
        margin-top: 2px;
    }

    .control-btn {
        height: 34px;
        min-height: 34px;
    }

    .volume {
        grid-column: 1 / -1;
        margin-top: 0;
    }

    .volume span {
        margin-bottom: 0;
        font-size: 12px;
    }

    .volume input {
        min-height: 22px;
    }

    .manager-row {
        padding: 4px;
        gap: 5px;
    }

    .manager-group {
        gap: 3px;
    }

    .service-status-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .service-actions {
        display: grid;
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .service-actions form,
    .service-actions button {
        width: 100%;
    }
}

/* 2026.05 progress bar full-width pass. */
.player-progress {
    grid-column: 1 / -1;
    width: 100%;
}

.player-progress .progress-slider {
    width: 100%;
}

@media (max-width: 760px) {
    .player-progress {
        grid-column: 1 / -1;
        margin-top: 2px;
        padding: 0 2px;
    }

    .player-progress .time-row {
        padding: 0 1px;
    }
}