:root {
      --bg: #0c0813;
      --bg-2: #120c1c;
      --panel: #17111f;
      --panel-2: #1e1629;
      --border: rgba(180, 130, 220, 0.16);
      --border-strong: rgba(238, 131, 185, 0.55);
      --text: #efe9f4;
      --muted: #a99fbb;
      --faint: #7c7291;
      --pink: #ee83b9;
      --purple: #b57edc;
      --grad: linear-gradient(135deg, #f48fb1 0%, #b57edc 100%);
      --glow: 0 0 40px rgba(181, 126, 220, 0.14);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      min-height: 100vh;
      background:
        radial-gradient(1200px 600px at 15% -10%, rgba(181, 126, 220, 0.12), transparent 60%),
        radial-gradient(1000px 500px at 100% 0%, rgba(238, 131, 185, 0.10), transparent 55%),
        var(--bg);
      color: var(--text);
      font-family: 'Poppins', system-ui, sans-serif;
      font-weight: 400;
      line-height: 1.6;
      padding: 2rem 1.5rem 4rem;
    }

    .page {
      max-width: 1180px;
      margin: 0 auto;
    }

    /* ---- header ---- */
    .masthead {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin-bottom: 1.6rem;
      padding-left: 0.3rem;
    }

    .masthead-text {
      display: flex;
      flex-direction: column;
      gap: 0.15rem;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: 0.02em;
      background: var(--grad);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .tagline {
      display: grid;
      grid-template-columns: auto auto 1fr;
      column-gap: 0.35rem;
      row-gap: 0.1rem;
      font-size: 0.78rem;
      color: var(--muted);
    }

    .tagline-letter {
      color: var(--pink);
      font-weight: 700;
    }

    .tagline-sep {
      color: var(--muted);
    }

    /* ---- site nav ---- */
    .site-nav {
      display: flex;
      flex-wrap: wrap;
      gap: 1.2rem;
      margin-left: auto;
      align-self: center;
    }

    .site-nav-link {
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--muted);
      text-decoration: none;
      transition: color 0.2s;
    }

    .site-nav-link:hover { color: var(--text); }

    .site-nav-link-disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }

    /* ---- shared card ---- */
    .card {
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 20px;
      box-shadow: var(--glow);
    }

    /* ---- dialogue window ---- */
    .dialogue {
      padding: 1.4rem 1.6rem 1.5rem;
      margin-bottom: 1.4rem;
    }

    .dialogue h2 {
      font-size: 1.02rem;
      font-weight: 500;
      color: var(--text);
      margin-bottom: 0.9rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .prompt-row {
      display: flex;
      gap: 0.7rem;
      align-items: stretch;
    }

    .prompt-textarea {
      flex: 1;
      min-height: 52px;
      max-height: 160px;
      padding: 0.9rem 1.1rem;
      border: 1px solid var(--border);
      border-radius: 14px;
      background: var(--bg-2);
      color: var(--text);
      font-family: inherit;
      font-size: 0.98rem;
      line-height: 1.5;
      resize: none;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .prompt-textarea::placeholder { color: var(--faint); }

    .prompt-textarea:focus {
      border-color: var(--border-strong);
      box-shadow: 0 0 0 3px rgba(238, 131, 185, 0.12);
    }

    .send-btn {
      align-self: stretch;
      padding: 0 1.5rem;
      border: none;
      border-radius: 14px;
      background: var(--grad);
      color: #2a0f24;
      font-family: inherit;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      white-space: nowrap;
      transition: transform 0.12s, filter 0.2s;
    }

    .send-btn:hover { filter: brightness(1.08); }
    .send-btn:active { transform: scale(0.97); }

    .send-btn:disabled {
      opacity: 0.6;
      cursor: not-allowed;
      filter: none;
    }

    .chips {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 0.95rem;
    }

    .chip-label {
      font-size: 0.8rem;
      color: var(--faint);
      align-self: center;
      margin-right: 0.15rem;
    }

    .chip {
      padding: 0.35rem 0.85rem;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: var(--panel-2);
      color: var(--muted);
      font-family: inherit;
      font-size: 0.8rem;
      cursor: pointer;
      transition: border-color 0.2s, color 0.2s, background 0.2s;
    }

    .chip:hover {
      border-color: var(--border-strong);
      color: var(--text);
      background: #251a33;
    }

    .conversation-log {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      margin-bottom: 1rem;
      max-height: 260px;
      overflow-y: auto;
    }

    /* ---- frozen dialogue window (a sequence is generated/in progress) ---- */
    .dialogue.frozen .prompt-row,
    .dialogue.frozen .chips {
      opacity: 0.5;
      pointer-events: none;
    }

    .dialogue-frozen-note {
      font-size: 0.82rem;
      color: var(--faint);
      margin-top: 0.9rem;
    }

    .conversation-turn {
      max-width: 80%;
      padding: 0.6rem 0.9rem;
      border-radius: 14px;
      font-size: 0.92rem;
      line-height: 1.45;
    }

    .conversation-turn.user {
      align-self: flex-end;
      background: var(--grad);
      color: #2a0f24;
    }

    .conversation-turn.assistant {
      align-self: flex-start;
      background: var(--panel-2);
      border: 1px solid var(--border);
      color: var(--text);
    }

    .conversation-turn a {
      color: var(--pink);
      text-decoration: underline;
    }

    .conversation-turn.assistant.typing-bubble {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 0.75rem 1rem;
    }

    .typing-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--muted);
      animation: typing-bounce 1.2s infinite ease-in-out;
    }

    .typing-dot:nth-child(2) { animation-delay: 0.2s; }
    .typing-dot:nth-child(3) { animation-delay: 0.4s; }

    @keyframes typing-bounce {
      0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
      30% { transform: translateY(-4px); opacity: 1; }
    }

    .goal-chip.selected {
      border-color: var(--border-strong);
      background: rgba(238, 131, 185, 0.14);
      color: var(--text);
    }

    #goalChips {
      flex-direction: column;
      align-items: stretch;
      gap: 0.5rem;
      margin-top: 0.9rem;
      margin-bottom: 0.7rem;
    }

    #goalChips .goal-chip {
      width: 100%;
      text-align: left;
      padding: 0.55rem 0.9rem;
    }

    /* ---- outer app grid (sidebar + main content) ---- */
    .app-grid {
      display: grid;
      grid-template-columns: 260px 1fr;
      gap: 1.4rem;
      align-items: start;
    }

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

    /* ---- profile sidebar ---- */
    .sidebar-card {
      padding: 1.5rem 1.4rem;
      position: sticky;
      top: 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 1.1rem;
    }

    .sidebar-greeting {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text);
    }

    .sidebar-section h4 {
      font-size: 0.75rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--pink);
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    .sidebar-section p {
      font-size: 0.92rem;
      color: var(--text);
    }

    .sidebar-links {
      display: flex;
      flex-direction: column;
      gap: 0.55rem;
      padding-top: 0.9rem;
      border-top: 1px solid var(--border);
    }

    .sidebar-link {
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text);
      text-decoration: none;
      transition: color 0.2s;
    }

    .sidebar-link:hover { color: var(--pink); }

    .sidebar-logout {
      margin-top: auto;
      align-self: flex-start;
      padding-top: 0.9rem;
      border-top: 1px solid var(--border);
      width: 100%;
      text-align: left;
      color: var(--muted);
    }

    .sidebar-logout:hover { color: var(--pink); }

    /* ---- anonymous trial mode ---- */
    .app-grid.anon-mode { grid-template-columns: 1fr; }
    .app-grid.anon-mode .sidebar-card { display: none; }

    .trial-banner {
      display: none;
      align-items: center;
      justify-content: space-between;
      gap: 0.8rem;
      padding: 0.7rem 1.1rem;
      margin-bottom: 1rem;
      border: 1px solid var(--border);
      border-radius: 14px;
      background: var(--panel-2);
      font-size: 0.85rem;
      color: var(--muted);
    }

    .trial-gate-msg {
      display: none;
      color: var(--pink);
      font-size: 0.9rem;
      font-weight: 500;
      margin-bottom: 0.9rem;
    }

    /* ---- main two-column layout ---- */
    .layout {
      display: grid;
      grid-template-columns: 1.35fr 1fr;
      gap: 1.4rem;
      align-items: start;
    }

    /* ---- sequence column ---- */
    .sequence-card { padding: 1.5rem 1.6rem; }

    .sequence-head {
      display: flex;
      align-items: center;
      gap: 0.55rem;
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    .sequence-head-title { flex: 1; }

    .new-practice-btn {
      flex: none;
      margin-left: auto;
      padding: 0.4rem 0.9rem;
      border: 1px solid var(--border-strong);
      border-radius: 999px;
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 0.78rem;
      font-weight: 500;
      cursor: pointer;
      transition: background 0.2s, color 0.2s;
    }

    .new-practice-btn:hover { background: rgba(238, 131, 185, 0.12); color: var(--pink); }

    .sequence-meta {
      font-size: 0.83rem;
      color: var(--muted);
      margin-bottom: 1.3rem;
      display: flex;
      flex-wrap: wrap;
      gap: 0.3rem 1.1rem;
    }

    .sequence-meta b { color: var(--pink); font-weight: 600; }

    .intent-card { padding: 1.5rem 1.6rem; margin-bottom: 1.4rem; }

    .ai-understanding-text { color: var(--text); font-size: 0.95rem; line-height: 1.6; margin: 0; }

    .sequence-loading {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--muted);
      font-size: 0.9rem;
      padding: 0.5rem 0 1.3rem;
    }

    .timeline { display: flex; flex-direction: column; gap: 0.7rem; }

    .phase {
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 0.9rem 1rem;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: var(--bg-2);
      cursor: pointer;
      text-align: left;
      width: 100%;
      font-family: inherit;
      color: var(--text);
      transition: border-color 0.2s, background 0.2s, transform 0.12s;
    }

    .phase:hover { border-color: var(--border-strong); background: var(--panel-2); }
    .phase:active { transform: scale(0.995); }

    .phase.selected {
      border-color: var(--border-strong);
      background: var(--panel-2);
      box-shadow: 0 0 0 1px var(--border-strong), 0 0 26px rgba(238, 131, 185, 0.16);
    }

    .phase.playing {
      position: relative;
      border-color: transparent;
      box-shadow: 0 0 0 2px rgba(238, 131, 185, 0.55), 0 0 28px rgba(238, 131, 185, 0.25);
    }

    .phase.playing::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 4px;
      border-radius: 16px 0 0 16px;
      background: var(--grad);
    }

    .badge {
      flex: none;
      width: 42px;
      height: 42px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      font-weight: 700;
      font-size: 1.05rem;
      color: #2a0f24;
      background: var(--grad);
    }

    .phase-body { flex: 1; min-width: 0; }

    .phase-label {
      font-size: 0.72rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--faint);
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }

    .phase-name {
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--text);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .phase-caret { color: var(--faint); font-size: 1.1rem; flex: none; }

    .module-section-label {
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--faint);
      margin-top: 0.4rem;
    }
    .module-section-label:first-child { margin-top: 0; }

    .module-card {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      padding: 0.7rem;
      border: 1px dashed var(--border);
      border-radius: 18px;
    }

    .module-card-footer { display: flex; align-items: center; justify-content: flex-end; gap: 0.5rem; }

    .module-pair-divider { border-top: 1px dashed var(--border); margin: 0.4rem 0; }

    .module-dup-badge {
      margin-right: auto;
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.03em;
      color: var(--faint);
    }

    .module-add-btn, .module-remove-btn {
      flex: none;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      border: 1px solid var(--border-strong);
      background: transparent;
      font-family: inherit;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      display: grid;
      place-items: center;
      transition: background 0.2s;
    }
    .module-add-btn { color: var(--pink); }
    .module-add-btn:hover { background: rgba(238, 131, 185, 0.12); }
    .module-remove-btn { color: var(--faint); }
    .module-remove-btn:hover { background: rgba(0, 0, 0, 0.06); }

    .sequence-footer {
      display: flex;
      align-items: center;
      gap: 0.9rem;
      margin-top: 1.3rem;
      flex-wrap: wrap;
    }

    .play-btn {
      padding: 0.6rem 1.3rem;
      border: 1px solid var(--border-strong);
      border-radius: 999px;
      background: transparent;
      color: var(--pink);
      font-family: inherit;
      font-size: 0.9rem;
      font-weight: 500;
      cursor: pointer;
      transition: background 0.2s, color 0.2s;
    }

    .play-btn:hover { background: rgba(238, 131, 185, 0.12); }

    .audio-status { font-size: 0.82rem; color: var(--muted); }

    /* ---- detail panel ---- */
    .detail-card {
      padding: 1.5rem 1.6rem;
      position: sticky;
      top: 1.5rem;
      min-height: 260px;
      max-height: calc(100vh - 3rem);
      overflow-y: auto;
    }

    .detail-empty {
      color: var(--faint);
      font-size: 0.92rem;
      text-align: center;
      padding: 3rem 1rem;
    }

    .detail-empty .lotus { font-size: 2rem; display: block; margin-bottom: 0.7rem; }

    .detail-phase-label {
      font-size: 0.72rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--faint);
      margin-bottom: 0.25rem;
    }

    .detail-name {
      font-size: 1.5rem;
      font-weight: 700;
      line-height: 1.25;
      margin-bottom: 1rem;
    }

    .detail-section { margin-top: 1.25rem; }

    .detail-section h4 {
      font-size: 0.75rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--pink);
      font-weight: 600;
      margin-bottom: 0.55rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }

    .detail-section p { font-size: 0.95rem; color: var(--text); }
    .detail-section p.muted { color: var(--muted); font-style: italic; }

    .tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }

    .tag {
      padding: 0.3rem 0.75rem;
      border-radius: 999px;
      font-size: 0.8rem;
      font-weight: 500;
      color: #f5d9ea;
      background: rgba(238, 131, 185, 0.14);
      border: 1px solid rgba(238, 131, 185, 0.3);
    }

    .listen-btn {
      margin-top: 1.4rem;
      padding: 0.5rem 1.1rem;
      border: 1px solid var(--border-strong);
      border-radius: 999px;
      background: transparent;
      color: var(--pink);
      font-family: inherit;
      font-size: 0.85rem;
      cursor: pointer;
      transition: background 0.2s;
    }

    .listen-btn:hover { background: rgba(238, 131, 185, 0.12); }

    .swap-group { margin-bottom: 0.7rem; }
    .swap-group:last-child { margin-bottom: 0; }

    .swap-group-label {
      display: block;
      font-size: 0.72rem;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      color: var(--muted);
      margin-bottom: 0.35rem;
    }

    .swap-buttons { display: flex; flex-direction: column; align-items: stretch; gap: 0.5rem; }

    .swap-btn {
      width: 100%;
      padding: 0.5rem 1.1rem;
      border: 1px solid var(--border-strong);
      border-radius: 999px;
      background: transparent;
      color: var(--pink);
      font-family: inherit;
      font-size: 0.85rem;
      text-align: center;
      cursor: pointer;
      transition: background 0.2s;
    }

    .swap-btn:not(:disabled):hover { background: rgba(238, 131, 185, 0.12); }
    .swap-btn:disabled { opacity: 0.5; cursor: default; }

    .swap-current {
      width: 100%;
      padding: 0.5rem 1.1rem;
      border-radius: 999px;
      background: var(--grad);
      color: #2a0f24;
      font-family: inherit;
      font-size: 0.85rem;
      font-weight: 700;
      text-align: center;
    }

    .no-match {
      margin-top: 1rem;
      color: var(--muted);
      font-size: 0.92rem;
    }

    /* ---- auth card ---- */
    .auth-card {
      padding: 1.4rem 1.6rem 1.5rem;
      margin-bottom: 1.4rem;
    }

    .auth-card h2 {
      font-size: 1.02rem;
      font-weight: 500;
      margin-bottom: 0.9rem;
    }

    .auth-fields {
      display: flex;
      flex-direction: column;
      gap: 0.7rem;
      margin-bottom: 0.9rem;
    }

    .text-input {
      padding: 0.75rem 1.05rem;
      border: 1px solid var(--border);
      border-radius: 14px;
      background: var(--bg-2);
      color: var(--text);
      font-family: inherit;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .text-input::placeholder { color: var(--faint); }

    .text-input:focus {
      border-color: var(--border-strong);
      box-shadow: 0 0 0 3px rgba(238, 131, 185, 0.12);
    }

    .auth-submit-btn { width: 100%; padding: 0.75rem; }

    .auth-toggle {
      margin-top: 0.9rem;
      font-size: 0.85rem;
      color: var(--muted);
      display: flex;
      gap: 0.4rem;
      align-items: center;
    }

    .link-btn {
      background: none;
      border: none;
      color: var(--pink);
      font-family: inherit;
      font-size: 0.85rem;
      font-weight: 600;
      cursor: pointer;
      padding: 0;
    }

    .link-btn:hover { text-decoration: underline; }

    /* ---- history pages (weekly-history.html, my-history.html) ---- */
    .history-card {
      padding: 1.4rem 1.6rem 1.6rem;
    }

    .history-card h2 {
      font-size: 1.1rem;
      font-weight: 500;
      margin-bottom: 0.4rem;
    }

    .history-intro {
      color: var(--muted);
      font-size: 0.9rem;
      margin-bottom: 1.2rem;
    }

    .history-list {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .history-week {
      padding: 1rem 1.2rem;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: var(--panel-2);
    }

    .history-week-header {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.6rem;
      margin-bottom: 0.7rem;
    }

    .history-week-date {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text);
    }

    .chip.chip-active {
      border-color: var(--border-strong);
      color: var(--text);
      background: rgba(238, 131, 185, 0.14);
    }

    .history-detail {
      margin-top: 0.9rem;
      padding-top: 0.9rem;
      border-top: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      gap: 0.9rem;
    }

    .history-module-title {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--pink);
      margin-bottom: 0.5rem;
    }

    .history-phase { margin-bottom: 0.55rem; }
    .history-phase:last-child { margin-bottom: 0; }

    .history-phase-title {
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      color: var(--muted);
      margin-bottom: 0.25rem;
    }

    .history-pose-list {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
    }

    .history-pose-list li {
      padding: 0.25rem 0.65rem;
      border-radius: 999px;
      font-size: 0.8rem;
      color: var(--text);
      background: var(--bg-2);
      border: 1px solid var(--border);
    }

    .history-practice-message,
    .history-practice-understanding,
    .history-practice-style {
      font-size: 0.9rem;
      color: var(--text);
      margin-bottom: 0.4rem;
    }

    .history-practice-understanding { color: var(--muted); font-style: italic; }

    .history-swaps {
      margin-top: 0.5rem;
      padding-top: 0.5rem;
      border-top: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      gap: 0.3rem;
    }

    .history-swap-line { font-size: 0.85rem; color: var(--muted); }

    .locked-state {
      padding: 1rem 0 0.2rem;
      color: var(--muted);
      font-size: 0.95rem;
    }

    .locked-state p { margin-bottom: 1rem; }

    .locked-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      padding: 0.6rem 1.4rem;
      height: auto;
    }

    /* ---- responsive ---- */
    @media (max-width: 880px) {
      .app-grid { grid-template-columns: 1fr; }
      .sidebar-card { position: static; }
      .layout { grid-template-columns: 1fr; }
      .detail-card { position: static; max-height: none; overflow-y: visible; }
      .prompt-row { flex-direction: column; }
      .send-btn { padding: 0.7rem; }
      .masthead { flex-wrap: wrap; }
    }