:root {
    color-scheme: light;
    --ink: #17211c;
    --muted: #65716b;
    --line: #d9dfd7;
    --panel: rgba(255, 255, 255, 0.86);
    --field: #f8faf6;
    --accent: #11745b;
    --accent-strong: #0b5a46;
    --warning: #a83b28;
    --shadow: 0 18px 50px rgba(22, 32, 27, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: Georgia, 'Times New Roman', serif;
    background:
        linear-gradient(135deg, rgba(17, 116, 91, 0.12), transparent 34%),
        radial-gradient(circle at 76% 10%, rgba(212, 158, 72, 0.22), transparent 28%),
        #eef2e9;
}

.shell {
    width: min(1100px, calc(100% - 32px));
    margin: 0 auto;
    padding: 48px 0;
}

.brand {
    max-width: 760px;
    margin-bottom: 28px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent-strong);
    font: 700 0.78rem/1.1 Verdana, sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0;
    line-height: 1.02;
}

h1 {
    font-size: clamp(2.4rem, 8vw, 5.8rem);
}

h2 {
    font-size: 1.45rem;
}

p {
    color: var(--muted);
    font-size: 1.08rem;
}

.panel,
.toolbar {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.panel {
    padding: 24px;
}

.auth {
    max-width: 430px;
}

.grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.85fr) minmax(280px, 1.15fr);
    gap: 18px;
    margin: 18px 0;
}

.toolbar,
.player-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.toolbar {
    padding: 14px 18px;
    margin-bottom: 18px;
}

label {
    display: grid;
    gap: 8px;
    margin-top: 16px;
    color: var(--muted);
    font: 700 0.86rem/1.2 Verdana, sans-serif;
}

input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--field);
    color: var(--ink);
    padding: 13px 14px;
    font: 1rem/1.2 Verdana, sans-serif;
}

.password-field {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}

.password-field button {
    min-height: 46px;
    margin-top: 0;
}

select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--field);
    color: var(--ink);
    padding: 13px 14px;
    font: 1rem/1.2 Verdana, sans-serif;
}

button,
.toolbar a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    margin-top: 18px;
    border: 0;
    border-radius: 6px;
    background: var(--accent);
    color: #fff;
    padding: 0 16px;
    font: 700 0.92rem/1 Verdana, sans-serif;
    text-decoration: none;
    cursor: pointer;
}

.toolbar a {
    margin-top: 0;
    background: var(--ink);
}

.room-list {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.compact-actions {
    align-items: center;
    margin-top: 0;
}

.compact-actions button,
.compact-actions .join-classroom {
    margin-top: 0;
}

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

.role-badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    margin-left: 8px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--field);
    color: var(--accent-strong);
    padding: 0 9px;
    font: 700 0.72rem/1 Verdana, sans-serif;
    text-transform: uppercase;
}

.room {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: rgba(248, 250, 246, 0.82);
    color: var(--ink);
    padding: 14px;
    text-decoration: none;
}

.room strong {
    font-family: Verdana, sans-serif;
    color: var(--accent-strong);
}

.room-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: stretch;
}

.saved-recording-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.16s ease;
}

.saved-recording-actions form,
.saved-recording-actions button {
    margin: 0;
}

.saved-recording-row:hover .saved-recording-actions,
.saved-recording-row:focus-within .saved-recording-actions {
    opacity: 1;
    pointer-events: auto;
}

.player-panel {
    margin-top: 18px;
}

.classroom-box {
    margin-top: 18px;
    border-top: 1px solid var(--line);
    padding-top: 18px;
}

.classroom-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.classroom-head h3 {
    margin: 0;
    font-size: 1.25rem;
}

.join-classroom {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    border-radius: 6px;
    background: var(--ink);
    color: #fff;
    padding: 0 14px;
    font: 700 0.86rem/1 Verdana, sans-serif;
    text-decoration: none;
}

.classroom-frame {
    width: 100%;
    min-height: min(72vh, 720px);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #111;
}

.recording-box {
    margin-top: 18px;
    border-top: 1px solid var(--line);
    padding-top: 18px;
}

.recording-head,
.recording-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.recording-head h3 {
    margin: 0;
    font-size: 1.25rem;
}

.recording-controls {
    justify-content: flex-start;
    margin-top: 14px;
}

.recording-controls button,
.download-recording {
    margin-top: 0;
}

.download-recording {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    border-radius: 6px;
    background: var(--ink);
    color: #fff;
    padding: 0 16px;
    font: 700 0.92rem/1 Verdana, sans-serif;
    text-decoration: none;
}

.recording-preview {
    display: block;
    width: 100%;
    max-height: 460px;
    margin-top: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #111;
}

.is-hidden {
    display: none !important;
}

.viewer-room-card {
    margin-top: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--field);
    padding: 18px;
}

.viewer-room-card h3 {
    margin: 0 0 14px;
    font-size: 1.15rem;
}

.viewer-room-card dl {
    display: grid;
    gap: 10px;
    margin: 0;
}

.viewer-room-card dl div {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 12px;
}

.viewer-room-card dt {
    color: var(--muted);
    font: 700 0.78rem/1.2 Verdana, sans-serif;
    text-transform: uppercase;
}

.viewer-room-card dd {
    margin: 0;
    overflow-wrap: anywhere;
}

.viewer-room-card a {
    color: var(--accent-strong);
}

.room-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.room-actions .join-classroom {
    min-height: 48px;
    background: #0f8f6f;
    color: #fff;
    padding: 0 20px;
    font-size: 0.95rem;
    box-shadow: 0 10px 20px rgba(15, 143, 111, 0.22);
}

.danger-button {
    background: var(--warning);
}

.compact-actions {
    align-items: center;
    margin-top: 0;
}

.compact-actions button {
    margin-top: 0;
}

.users-panel {
    margin-top: 18px;
}

.inline-form {
    display: grid;
    grid-template-columns: repeat(3, minmax(180px, 1fr)) auto;
    gap: 12px;
    align-items: end;
}

.inline-form label,
.inline-form button {
    margin-top: 0;
}

.user-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.user-list span {
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--field);
    padding: 7px 10px;
    font: 700 0.8rem/1 Verdana, sans-serif;
}

.success {
    color: var(--accent-strong);
    font-weight: 700;
}

.alert {
    color: var(--warning);
    font-weight: 700;
}

.hint {
    font-size: 0.9rem;
}

@media (max-width: 760px) {
    .shell {
        width: min(100% - 20px, 1100px);
        padding: 28px 0;
    }

    .grid,
    .inline-form,
    .classroom-head,
    .room-row,
    .viewer-room-card dl div,
    .toolbar,
    .player-head {
        grid-template-columns: 1fr;
        flex-direction: column;
        align-items: stretch;
    }

    .room-actions .join-classroom,
    .room-actions button,
    .recording-controls button,
    .download-recording {
        width: 100%;
    }
}