:root {
      --page-bg-a: #14101c;
      --page-bg-b: #1f1830;
      --page-glow: rgba(120, 90, 200, 0.35);
      --card: rgba(28, 24, 38, 0.72);
      --card-border: rgba(255, 255, 255, 0.08);
      --text: #f4f0ff;
      --muted: #a69bb8;
      --stroke: rgba(255, 255, 255, 0.12);
      --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
      --radius: 22px;
      --radius-sm: 14px;
      --btn-primary: linear-gradient(135deg, #8b7cf8, #6c5ce7);
      --ring-track: rgba(255, 255, 255, 0.12);
      --focus-ring: #8b7cf8;
      --break-ring: #f0b27a;
    }

    html[data-profile="intense"] {
      --page-glow: rgba(108, 92, 231, 0.4);
      --focus-ring: #9d8fff;
      --accent-soft: rgba(157, 143, 255, 0.25);
    }

    html[data-profile="learn"] {
      --page-glow: rgba(56, 189, 248, 0.25);
      --focus-ring: #38bdf8;
      --accent-soft: rgba(56, 189, 248, 0.2);
    }

    html[data-profile="light"] {
      --page-glow: rgba(52, 211, 153, 0.28);
      --focus-ring: #34d399;
      --accent-soft: rgba(52, 211, 153, 0.22);
    }

    html[data-profile="relax"] {
      --page-glow: rgba(244, 114, 182, 0.22);
      --focus-ring: #f472b6;
      --accent-soft: rgba(244, 114, 182, 0.2);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      min-height: 100vh;
      min-height: 100dvh;
      font-family: "DM Sans", system-ui, sans-serif;
      color: var(--text);
      background:
        radial-gradient(ellipse 100% 80% at 50% -20%, var(--page-glow), transparent 55%),
        linear-gradient(165deg, var(--page-bg-a) 0%, var(--page-bg-b) 45%, #17121f 100%);
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding:
        max(20px, env(safe-area-inset-top))
        max(16px, env(safe-area-inset-right))
        max(28px, env(safe-area-inset-bottom))
        max(16px, env(safe-area-inset-left));
    }

    .wrap {
      width: min(440px, 100%);
    }

    @media (min-width: 880px) {
      body {
        align-items: center;
        padding-top: max(32px, env(safe-area-inset-top));
        padding-bottom: max(40px, env(safe-area-inset-bottom));
      }

      .wrap {
        width: min(980px, 100%);
      }
    }

    header {
      text-align: center;
      margin-bottom: 22px;
    }

    @media (min-width: 880px) {
      header {
        margin-bottom: 28px;
      }

      header h1 {
        font-size: 2.05rem;
      }

      header p {
        font-size: 1rem;
      }
    }

    header .badge {
      display: inline-block;
      font-size: 0.68rem;
      font-weight: 600;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--muted);
      border: 1px solid var(--stroke);
      padding: 5px 10px;
      border-radius: 999px;
      margin-bottom: 12px;
      background: rgba(255, 255, 255, 0.03);
    }

    header h1 {
      margin: 0 0 8px;
      font-size: 1.85rem;
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.15;
    }

    header p {
      margin: 0 auto;
      font-size: 0.95rem;
      color: var(--muted);
      line-height: 1.45;
    }

    .card {
      background: var(--card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: var(--radius);
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow);
      padding: 22px 20px 20px;
    }

    @media (min-width: 880px) {
      .card {
        padding: 28px 32px 26px;
      }
    }

    .card-grid {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .col-setup,
    .col-timer,
    .col-audio {
      display: flex;
      flex-direction: column;
      min-width: 0;
    }

    .col-audio {
      gap: 4px;
    }

    .col-audio .hint {
      margin-top: 10px;
    }

    @media (min-width: 880px) {
      .card-grid {
        display: grid;
        grid-template-columns: minmax(300px, 1.12fr) minmax(280px, 1fr);
        grid-template-rows: auto auto;
        gap: 16px 40px;
        align-items: start;
      }

      .col-timer {
        grid-column: 1;
        grid-row: 1 / -1;
        position: sticky;
        top: max(12px, env(safe-area-inset-top));
        align-self: start;
      }

      .col-setup {
        grid-column: 2;
        grid-row: 1;
      }

      .col-audio {
        grid-column: 2;
        grid-row: 2;
      }

      .col-audio .sound-block {
        border-top: none;
        margin-top: 0;
        padding-top: 0;
      }
    }

    .section-label {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 10px;
    }

    .profiles {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-bottom: 18px;
    }

    @media (min-width: 880px) {
      .profiles {
        grid-template-columns: 1fr;
        gap: 8px;
        margin-bottom: 16px;
      }
    }

    @media (min-width: 1100px) {
      .profiles {
        grid-template-columns: 1fr 1fr;
      }
    }

    .profiles button {
      text-align: left;
      border: 1px solid var(--stroke);
      border-radius: var(--radius-sm);
      padding: 10px 11px;
      font-family: inherit;
      cursor: pointer;
      background: rgba(255, 255, 255, 0.03);
      color: var(--text);
      transition: border-color 0.15s ease, background 0.15s ease, transform 0.12s ease;
    }

    .profiles button:hover {
      background: rgba(255, 255, 255, 0.06);
      transform: translateY(-1px);
    }

    .profiles button.active {
      border-color: rgba(255, 255, 255, 0.22);
      background: var(--accent-soft);
      box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
    }

    .profiles button .t {
      display: block;
      font-size: 0.82rem;
      font-weight: 700;
    }

    .profiles button .s {
      display: block;
      margin-top: 2px;
      font-size: 0.68rem;
      color: var(--muted);
      font-weight: 500;
      line-height: 1.25;
    }

    .task-field {
      margin-bottom: 14px;
    }

    .task-field label {
      display: block;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 6px;
    }

    .task-field input[type="text"] {
      width: 100%;
      border: 1px solid var(--stroke);
      border-radius: var(--radius-sm);
      padding: 11px 13px;
      font-family: inherit;
      font-size: 0.92rem;
      color: var(--text);
      background: rgba(0, 0, 0, 0.25);
      outline: none;
      transition: border-color 0.15s ease, box-shadow 0.15s ease;
    }

    .task-field input[type="text"]:focus {
      border-color: rgba(139, 124, 248, 0.55);
      box-shadow: 0 0 0 3px rgba(139, 124, 248, 0.15);
    }

    .task-field input[type="text"]::placeholder {
      color: #6f6580;
    }

    .duration-row {
      display: flex;
      gap: 10px;
      margin-bottom: 16px;
    }

    .dur {
      flex: 1;
      min-width: 0;
    }

    .dur > label {
      display: block;
      font-size: 0.7rem;
      font-weight: 700;
      color: var(--muted);
      margin-bottom: 5px;
    }

    .dur-input {
      display: flex;
      align-items: center;
      gap: 6px;
      border: 1px solid var(--stroke);
      border-radius: var(--radius-sm);
      padding: 4px 9px;
      background: rgba(0, 0, 0, 0.22);
    }

    .dur-input input[type="number"] {
      width: 100%;
      min-width: 0;
      border: none;
      background: transparent;
      font-family: inherit;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text);
      outline: none;
      padding: 6px 0;
      font-variant-numeric: tabular-nums;
    }

    .dur-input input[type="number"]:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }

    .dur-input .suffix {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--muted);
      flex-shrink: 0;
    }

    .modes {
      display: flex;
      gap: 8px;
      margin-bottom: 20px;
    }

    .modes button {
      flex: 1;
      border: 1px solid var(--stroke);
      border-radius: var(--radius-sm);
      padding: 10px 8px;
      font-family: inherit;
      font-size: 0.8rem;
      font-weight: 600;
      cursor: pointer;
      background: rgba(255, 255, 255, 0.04);
      color: var(--muted);
      transition: transform 0.12s ease, color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
    }

    .modes button:hover {
      transform: translateY(-1px);
      color: var(--text);
    }

    .modes button.active {
      background: rgba(255, 255, 255, 0.1);
      color: var(--text);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .ring-wrap {
      box-sizing: border-box;
      width: min(260px, min(72vw, 62dvh));
      max-width: 100%;
      aspect-ratio: 1 / 1;
      height: auto;
      margin-inline: auto;
      margin-bottom: 20px;
      flex-shrink: 0;
    }

    @media (min-width: 880px) {
      .ring-wrap {
        width: min(300px, min(100%, 70dvh));
        margin: 8px auto 22px;
      }
    }

    .ring {
      box-sizing: border-box;
      width: 100%;
      height: 100%;
      border-radius: 50%;
      overflow: hidden;
      background: conic-gradient(
        var(--focus-ring) calc(var(--progress, 0) * 1turn),
        var(--ring-track) 0
      );
      padding: 9px;
      transition: background 0.4s ease;
    }

    .ring[data-mode="break"] {
      background: conic-gradient(
        var(--break-ring) calc(var(--progress, 0) * 1turn),
        var(--ring-track) 0
      );
    }

    .ring-inner {
      box-sizing: border-box;
      width: 100%;
      height: 100%;
      min-width: 0;
      min-height: 0;
      border-radius: 50%;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(32, 28, 44, 0.98) 0%, rgba(22, 18, 32, 0.98) 100%);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border: 1px solid rgba(255, 255, 255, 0.06);
      padding: 12px;
      text-align: center;
    }

    .time {
      font-size: clamp(2.1rem, 6.5vw, 2.85rem);
      font-weight: 700;
      letter-spacing: 0.03em;
      line-height: 1;
      font-variant-numeric: tabular-nums;
    }

    @media (min-width: 880px) {
      .time {
        font-size: 2.95rem;
      }
    }

    .label {
      margin-top: 8px;
      font-size: 0.8rem;
      color: var(--muted);
      font-weight: 600;
    }

    .task-peek {
      margin-top: 6px;
      font-size: 0.7rem;
      font-weight: 600;
      color: #c4b5fd;
      line-height: 1.25;
      max-height: 2.45em;
      overflow: hidden;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      line-clamp: 2;
      -webkit-box-orient: vertical;
      word-break: break-word;
    }

    .task-peek:empty {
      display: none;
    }

    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
      justify-content: center;
      margin-bottom: 0;
    }

    .timer-note {
      margin: 14px 0 0;
      text-align: center;
      font-size: 0.74rem;
      color: var(--muted);
      line-height: 1.55;
      max-width: min(42ch, 100%);
      align-self: center;
    }

    .timer-note kbd {
      font-family: inherit;
      font-size: 0.68rem;
      padding: 2px 6px;
      border-radius: 6px;
      border: 1px solid var(--stroke);
      background: rgba(255, 255, 255, 0.05);
    }

    @media (min-width: 880px) {
      .timer-note {
        max-width: min(48ch, 100%);
      }
    }

    .controls button {
      border: none;
      border-radius: 999px;
      padding: 12px 20px;
      font-family: inherit;
      font-size: 0.9rem;
      font-weight: 700;
      cursor: pointer;
      transition: transform 0.1s ease, filter 0.15s ease;
    }

    .controls button:active {
      transform: scale(0.98);
    }

    @media (max-width: 520px) {
      .controls {
        gap: 10px;
      }

      .controls button {
        min-height: 46px;
        padding: 12px 18px;
      }

      .btn-primary {
        flex: 1 1 100%;
        min-width: 0;
      }

      .modes button {
        min-height: 46px;
        padding: 12px 10px;
      }

      .profiles button {
        min-height: 48px;
        padding: 12px 11px;
      }
    }

    .btn-primary {
      background: var(--btn-primary);
      color: #fff;
      box-shadow: 0 8px 28px rgba(108, 92, 231, 0.35);
      min-width: 118px;
    }

    .btn-primary:hover {
      filter: brightness(1.06);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.06);
      color: var(--text);
      border: 1px solid var(--stroke);
    }

    .btn-ghost:disabled {
      opacity: 0.4;
      cursor: not-allowed;
    }

    .btn-small {
      padding: 10px 14px;
      font-size: 0.82rem;
    }

    .sound-block {
      border-top: 1px solid var(--stroke);
      margin-top: 8px;
      padding-top: 16px;
    }

    .sound-row {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 8px;
    }

    .sound-row label[for="vol"] {
      font-size: 0.78rem;
      color: var(--muted);
      font-weight: 600;
      min-width: 4.5rem;
    }

    #vol {
      flex: 1;
      min-width: 120px;
      accent-color: #8b7cf8;
    }

    .sound-mode-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-bottom: 14px;
    }

    .sound-btn {
      min-height: 46px;
      padding: 11px 14px;
      border-radius: 12px;
      border: 1px solid var(--stroke);
      background: rgba(255, 255, 255, 0.06);
      color: var(--text);
      font-family: inherit;
      font-size: 0.86rem;
      font-weight: 600;
      letter-spacing: 0.02em;
      cursor: pointer;
      transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
    }

    .sound-btn:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(139, 124, 248, 0.35);
    }

    .sound-btn:active {
      transform: scale(0.98);
    }

    .sound-btn[aria-pressed="true"] {
      background: rgba(139, 124, 248, 0.22);
      border-color: rgba(139, 124, 248, 0.55);
      box-shadow: 0 0 0 1px rgba(139, 124, 248, 0.2);
    }

    #musicToggle[aria-pressed="true"] {
      background: rgba(45, 212, 191, 0.14);
      border-color: rgba(45, 212, 191, 0.45);
      box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.18);
    }

    .sound-btn:disabled {
      opacity: 0.55;
      cursor: wait;
    }

    .sound-btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(196, 181, 253, 0.45);
    }

    .music-field {
      margin-bottom: 12px;
    }

    .music-field label {
      display: block;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 6px;
    }

    #musicSelect {
      width: 100%;
      border-radius: var(--radius-sm);
      border: 1px solid var(--stroke);
      background: rgba(0, 0, 0, 0.22);
      color: var(--text);
      font-family: inherit;
      font-size: 0.88rem;
      font-weight: 600;
      padding: 10px 12px;
      outline: none;
      cursor: pointer;
    }

    #musicSelect:focus {
      border-color: rgba(139, 124, 248, 0.55);
      box-shadow: 0 0 0 2px rgba(139, 124, 248, 0.12);
    }

    #musicSelect option {
      background: #1c1428;
      color: var(--text);
    }

    .dev-page-strip {
      text-align: center;
      width: 100%;
      margin: 0;
      padding: 22px 18px 20px;
      border-top: 1px solid var(--stroke);
      color: var(--muted);
      font-size: clamp(0.92rem, 2.6vw, 1.1rem);
      line-height: 1.55;
      box-sizing: border-box;
    }

    .dev-page-strip .dev-credit {
      display: inline-block;
      margin: 0;
      max-width: min(40rem, 100%);
      font-size: inherit;
      line-height: inherit;
      color: inherit;
    }

    .dev-page-strip .dev-credit strong {
      color: #ede9fe;
      font-weight: 700;
      font-size: 1.14em;
      letter-spacing: 0.01em;
    }

    .dev-page-strip .dev-credit a {
      color: #c4b5fd;
      font-weight: 600;
      text-decoration: none;
      padding: 0 2px;
    }

    .dev-page-strip .dev-credit a:hover {
      text-decoration: underline;
    }

    @media (min-width: 880px) {
      .dev-page-strip {
        padding: 26px 32px 24px;
        font-size: 1.08rem;
      }

      .dev-page-strip .dev-credit strong {
        font-size: 1.18em;
      }
    }

    .sound-note {
      font-size: 0.72rem;
      color: var(--muted);
      line-height: 1.45;
      margin: 0;
    }

    .sound-note a {
      color: #c4b5fd;
      text-decoration: none;
      font-weight: 600;
    }

    .hint-dev-append {
      display: inline-block;
      margin-top: 6px;
      font-size: 0.8rem;
      color: var(--muted);
      line-height: 1.45;
    }

    .hint-dev-append strong {
      color: #ddd6fe;
      font-weight: 700;
    }

    .hint-dev-append a {
      color: #c4b5fd;
      font-weight: 600;
    }

    .hint-dev-append a:hover {
      text-decoration: underline;
    }

    .sound-note a:hover {
      text-decoration: underline;
    }

    .hint {
      text-align: center;
      font-size: 0.84rem;
      color: var(--muted);
      line-height: 1.45;
      min-height: 2.5em;
      padding: 0 2px;
      margin: 0;
    }

    @media (min-width: 880px) {
      .hint {
        text-align: left;
        margin-top: 4px;
      }
    }

    .hint strong {
      color: #ddd6fe;
      font-weight: 700;
    }

    button {
      touch-action: manipulation;
    }

    header a.header-link {
      color: #c4b5fd;
      text-decoration: none;
      font-weight: 600;
    }

    header a.header-link:hover {
      text-decoration: underline;
    }