:root {
    --pdm-bg:      #0d0d0f;
    --pdm-surface: #18181b;
    --pdm-border:  #2d2d33;
    --pdm-accent:  #e63946;
    --pdm-text:    #f1f1f3;
    --pdm-muted:   #8c8c9a;
    --pdm-left:    #4fc3f7;
    --pdm-right:   #ef5350;
    --pdm-center:  #aaa;
    --pdm-lib:     #ffd54f;
    --pdm-radius:  14px;
}

.pdm-wrap {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--pdm-bg); color: var(--pdm-text);
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 24px 16px; box-sizing: border-box;
}

.pdm-screen { display: none; width: 100%; }
.pdm-screen.pdm-active { display: flex; justify-content: center; }

.pdm-card {
    background: var(--pdm-surface); border: 1px solid var(--pdm-border);
    border-radius: var(--pdm-radius); padding: 40px 36px;
    max-width: 620px; width: 100%; box-shadow: 0 8px 40px rgba(0,0,0,.5);
}
.pdm-card-center { text-align: center; }

.pdm-logo { font-size: 52px; line-height: 1; margin-bottom: 8px; }
.pdm-title {
    font-size: 2rem; font-weight: 800; letter-spacing: -.5px; margin: 0 0 6px;
    background: linear-gradient(135deg, #e63946, #457b9d);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.pdm-subtitle { color: var(--pdm-muted); margin: 0 0 28px; font-size: .95rem; }

.pdm-field { margin-bottom: 22px; }
.pdm-field > label {
    display: block; font-size: .82rem; font-weight: 600; color: var(--pdm-muted);
    text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px;
}
.pdm-label-hint { text-transform: none; font-weight: 400; font-size: .78rem; color: #666; letter-spacing: 0; }

.pdm-field input[type="text"] {
    width: 100%; background: #111114; border: 1px solid var(--pdm-border);
    border-radius: 8px; color: var(--pdm-text); padding: 11px 14px;
    font-size: 1rem; box-sizing: border-box; -webkit-appearance: none;
}
.pdm-field input[type="text"]:focus { outline: none; border-color: var(--pdm-accent); }

/* ── topic grid ── */
.pdm-topic-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
}
.pdm-topic-option { position: relative; cursor: pointer; }
.pdm-topic-option input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; }
.pdm-topic-option span {
    display: block; text-align: center; padding: 10px 6px; border-radius: 8px;
    border: 1px solid var(--pdm-border); font-size: .78rem; font-weight: 500;
    color: var(--pdm-muted); background: #111114; cursor: pointer;
    transition: all .15s; line-height: 1.3;
}
.pdm-topic-option input:checked + span {
    border-color: var(--pdm-accent); background: rgba(230,57,70,.15); color: var(--pdm-text);
}
.pdm-topic-option:hover span { border-color: #555; color: var(--pdm-text); }

/* ── lean grid ── */
.pdm-lean-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.pdm-lean-option { position: relative; cursor: pointer; }
.pdm-lean-option input[type="radio"] { position: absolute; opacity: 0; width: 0; height: 0; }
.pdm-lean-option span {
    display: block; text-align: center; padding: 9px 6px; border-radius: 8px;
    border: 1px solid var(--pdm-border); font-size: .78rem; font-weight: 600;
    color: var(--pdm-muted); background: #111114; cursor: pointer; transition: all .15s;
}
.pdm-lean-option input:checked + span { border-color: var(--pdm-accent); background: rgba(230,57,70,.15); color: var(--pdm-text); }
.pdm-lean-option:hover span { border-color: #555; color: var(--pdm-text); }

/* errors */
.pdm-field-error { color: #ff8a8a; font-size: .84rem; margin-top: 8px; padding: 8px 12px; background: rgba(230,57,70,.1); border-radius: 6px; border: 1px solid rgba(230,57,70,.3); }

.pdm-rules { background: rgba(255,255,255,.04); border-radius: 8px; padding: 14px 16px; margin-bottom: 16px; font-size: .84rem; color: var(--pdm-muted); }
.pdm-rules strong { color: var(--pdm-text); display: block; margin-bottom: 6px; }
.pdm-rules ul { margin: 0; padding-left: 18px; }
.pdm-rules li { margin-bottom: 4px; }

.pdm-btn { display: inline-block; padding: 13px 28px; border-radius: 9px; font-size: 1rem; font-weight: 700; cursor: pointer; border: none; transition: opacity .15s, transform .1s; }
.pdm-btn:hover { opacity: .88; }
.pdm-btn:active { transform: scale(.97); }
.pdm-btn-primary { background: linear-gradient(135deg, var(--pdm-accent), #c1121f); color: #fff; width: 100%; text-align: center; margin-top: 8px; }
.pdm-btn-ghost { background: transparent; color: var(--pdm-muted); border: 1px solid var(--pdm-border); margin-top: 12px; }
.pdm-btn-danger { background: transparent; color: var(--pdm-accent); border: 1px solid var(--pdm-accent); padding: 9px 20px; font-size: .9rem; }

.pdm-spinner { width: 56px; height: 56px; border: 5px solid var(--pdm-border); border-top-color: var(--pdm-accent); border-radius: 50%; animation: pdm-spin .8s linear infinite; margin: 0 auto 24px; }
@keyframes pdm-spin { to { transform: rotate(360deg); } }

#pdm-screen-waiting .pdm-card h2 { font-size: 1.4rem; margin: 0 0 8px; }
.pdm-meta { color: var(--pdm-muted); font-size: .9rem; margin: 0 0 16px; }
.pdm-hint { font-size: .85rem; color: var(--pdm-muted); max-width: 340px; margin: 0 auto 20px; }
.pdm-timer { font-size: 1.6rem; font-weight: 700; color: var(--pdm-muted); margin-bottom: 16px; font-variant-numeric: tabular-nums; }

/* ── debate screen ── */
#pdm-screen-debate { flex-direction: column; align-items: stretch; height: 100vh; padding: 0; }

.pdm-debate-header {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--pdm-surface); border-bottom: 1px solid var(--pdm-border);
    padding: 10px 16px; flex-shrink: 0; gap: 12px; flex-wrap: wrap;
}
.pdm-debate-info { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.pdm-badge { background: rgba(230,57,70,.2); border: 1px solid var(--pdm-accent); color: var(--pdm-accent); border-radius: 20px; padding: 3px 10px; font-size: .78rem; font-weight: 700; }
.pdm-vs { font-size: .88rem; color: var(--pdm-muted); white-space: nowrap; }
.pdm-vs em { font-style: normal; font-weight: 700; }

.pdm-debate-controls { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.pdm-ctrl-btn { background: rgba(255,255,255,.08); border: 1px solid var(--pdm-border); color: var(--pdm-text); border-radius: 8px; padding: 8px 12px; font-size: 1.1rem; cursor: pointer; transition: all .15s; }
.pdm-ctrl-btn:hover { background: rgba(255,255,255,.15); }
.pdm-ctrl-btn.pdm-ctrl-off { background: rgba(230,57,70,.2); border-color: var(--pdm-accent); }

#pdm-video-area { flex: 1; position: relative; background: #000; overflow: hidden; }
#pdm-remote-wrap { position: absolute; inset: 0; }
#pdm-remote-video { width: 100%; height: 100%; object-fit: cover; background: #111; }

#pdm-connecting-msg {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    color: var(--pdm-muted); background: rgba(0,0,0,.7); padding: 10px 20px;
    border-radius: 8px; pointer-events: none; font-size: .95rem;
}

#pdm-local-wrap {
    position: absolute; bottom: 16px; right: 16px;
    width: 180px; height: 130px; border-radius: 10px; overflow: hidden;
    border: 2px solid var(--pdm-border); box-shadow: 0 4px 20px rgba(0,0,0,.6);
}
#pdm-local-video { width: 100%; height: 100%; object-fit: cover; background: #222; }
#pdm-local-label { position: absolute; bottom: 4px; left: 8px; font-size: .72rem; color: rgba(255,255,255,.7); text-shadow: 0 1px 3px rgba(0,0,0,.8); }

.lean-left { color: var(--pdm-left); }
.lean-right { color: var(--pdm-right); }
.lean-center { color: var(--pdm-center); }
.lean-lib { color: var(--pdm-lib); }
.lean-mid { color: #b0b0c0; }

.pdm-done-icon { font-size: 56px; margin-bottom: 12px; }
#pdm-screen-done .pdm-card h2 { margin: 0 0 8px; }
#pdm-screen-done .pdm-card p { color: var(--pdm-muted); margin: 0 0 24px; }

@media (max-width: 540px) {
    .pdm-card { padding: 28px 16px; }
    .pdm-topic-grid { grid-template-columns: repeat(2, 1fr); }
    .pdm-lean-grid { grid-template-columns: repeat(2, 1fr); }
    .pdm-title { font-size: 1.6rem; }
    #pdm-local-wrap { width: 110px; height: 80px; }
}