:root {
      --ink: #080808;
      --surface: #111111;
      --surface-raised: #191919;
      --line: #2b2b2b;
      --muted: #858585;
      --paper: #f4f0e8;
      --red: #ff1509;
      --pink: #ff0a50;
      --display-font: 'Space Grotesk', sans-serif;
      --mono-font: 'DM Mono', monospace;
    }

    * { box-sizing: border-box; }

    body {
      min-width: 320px;
      margin: 0;
      color: var(--paper);
      background: var(--ink);
      font-family: var(--display-font);
    }

    body::before {
      position: fixed;
      inset: 0;
      z-index: -1;
      background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
      background-size: 48px 48px;
      content: '';
      mask-image: linear-gradient(to bottom, black, transparent 88%);
      pointer-events: none;
    }

    input, button { font: inherit; }
    .app-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 28px 0 48px; }
    header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
    .brand { display: flex; flex: 0 0 auto; align-items: center; gap: 12px; color: var(--red); font-size: 14px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
    .brand-mark { width: 18px; height: 18px; border: 4px solid var(--red); border-radius: 50%; box-shadow: 4px 0 0 -1px var(--pink); }
    .header-tools { display: flex; align-items: center; justify-content: flex-end; gap: 12px; }
    .page-nav { display: flex; gap: 6px; }
    .page-link { padding: 9px 12px; border: 1px solid var(--line); color: var(--muted); background: transparent; font-size: 11px; text-decoration: none; white-space: nowrap; }
    .page-link[aria-current="page"] { border-color: var(--red); color: var(--ink); background: var(--red); }
    .page-link:hover { border-color: var(--pink); color: var(--red); background-color: var(--ink); }
    .header-fields { display: flex; gap: 6px; }
    .header-field { width: 36px; height: 34px; border: 1px solid var(--line); outline: none; color: var(--paper); background: var(--surface); text-align: center; }
    .header-field::placeholder { color: var(--muted); }
    .header-field:focus { border-color: var(--pink); }
    .date { color: var(--muted); font-family: var(--mono-font); font-size: 10px; text-transform: uppercase; white-space: nowrap; }
    main { padding-top: 38px; }
    .intro { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
    h1 { margin: 0; color: var(--paper); font-size: clamp(40px, 6vw, 68px); line-height: .96; }
    h1 span { color: var(--pink); }
    .session-note { max-width: 250px; margin: 0 3px 3px 0; color: var(--muted); font-family: var(--mono-font); font-size: 12px; line-height: 1.5; }
    .week-summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; color: var(--muted); font-family: var(--mono-font); font-size: 11px; text-transform: uppercase; }
    .progress-track { height: 4px; margin-bottom: 20px; background: var(--line); }
    .progress-bar { width: 0; height: 100%; background: var(--pink); transition: width .2s ease; }
    .week-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
    .day-panel { min-width: 0; padding: 17px 15px 14px; border: 1px solid var(--line); background: var(--surface); }
    .day-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
    .day-heading h2 { margin: 0; color: var(--red); font-size: 18px; }
    .day-count { color: var(--pink); font-family: var(--mono-font); font-size: 10px; white-space: nowrap; }
    .task-list { display: grid; gap: 7px; }
    .task-row { display: flex; align-items: center; gap: 8px; min-width: 0; min-height: 35px; padding: 3px 7px; border: 1px solid var(--line); background: var(--surface-raised); }
    .task-check { flex: 0 0 auto; width: 15px; height: 15px; margin: 0; accent-color: var(--pink); cursor: pointer; }
    .task-input { width: 100%; min-width: 0; padding: 5px 0; border: 0; outline: 0; color: var(--paper); background: transparent; font-size: 12px; }
    .task-input::placeholder { color: #666; }
    .task-row.completed .task-input { color: var(--red); text-decoration: line-through; }
    @media (max-width: 900px) { .week-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } .header-tools { gap: 8px; } }
    @media (max-width: 680px) {
      .app-shell { width: min(100% - 28px, 560px); padding-top: 18px; }
      header { align-items: flex-start; flex-direction: column; gap: 14px; }
      .header-tools { width: 100%; flex-wrap: wrap; justify-content: flex-start; }
      .date { margin-left: auto; }
      main { padding-top: 28px; }
      .intro { display: block; }
      .session-note { margin-top: 15px; }
      .week-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
      .day-panel { padding: 13px 10px 11px; }
      .day-heading h2 { font-size: 16px; }
    }
    @media (max-width: 390px) { .page-link { padding: 8px 9px; font-size: 10px; } .week-grid { grid-template-columns: 1fr; } }

    .auth-shell { display: flex; flex-direction: column; width: min(480px, calc(100% - 32px)); min-height: 100vh; margin: 0 auto; padding: 28px 0; }
    .auth-header { align-items: center; padding-bottom: 16px; }
    .auth-count, .auth-eyebrow { color: var(--muted); font-family: var(--mono-font); font-size: 10px; text-transform: uppercase; }
    .auth-main { margin: auto 0; padding: 28px; border: 1px solid var(--line); border-top: 3px solid var(--red); background: var(--surface); }
    .auth-eyebrow { margin: 0 0 12px; color: var(--pink); }
    .auth-main h1 { margin-bottom: 26px; font-size: 44px; }
    .auth-mode { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
    .auth-tab { padding: 10px 8px; border: 0; border-bottom: 2px solid transparent; color: var(--muted); background: transparent; cursor: pointer; font-size: 12px; }
    .auth-tab.active { border-bottom-color: var(--red); color: var(--paper); }
    .auth-tab:disabled { opacity: .4; cursor: not-allowed; }
    .auth-field { display: grid; gap: 7px; margin-bottom: 16px; color: var(--paper); font-size: 12px; }
    .auth-field input { width: 100%; min-height: 42px; padding: 0 11px; border: 1px solid var(--line); outline: 0; color: var(--paper); background: var(--surface-raised); }
    .auth-field input:focus { border-color: var(--pink); }
    .auth-message { min-height: 20px; margin: 0 0 12px; color: var(--pink); font-family: var(--mono-font); font-size: 11px; line-height: 1.5; }
    .auth-submit { display: flex; width: 100%; align-items: center; justify-content: space-between; padding: 13px 14px; border: 1px solid var(--red); color: var(--ink); background: var(--red); cursor: pointer; font-size: 13px; font-weight: 700; }
    .auth-submit:hover { border-color: var(--pink); background: var(--pink); }
    .auth-submit:disabled { opacity: .55; cursor: wait; }
    .account-manager { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
    .account-manager-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
    .account-manager-heading h2 { margin: 0; color: var(--paper); font-size: 15px; }
    .account-list { display: grid; gap: 6px; margin: 12px 0 0; padding: 0; list-style: none; }
    .account-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 38px; padding: 5px 8px; border: 1px solid var(--line); background: var(--surface-raised); }
    .account-name { min-width: 0; overflow-wrap: anywhere; color: var(--paper); font-size: 12px; }
    .account-delete { flex: 0 0 auto; padding: 5px 8px; border: 1px solid var(--line); color: var(--muted); background: transparent; cursor: pointer; font-size: 10px; }
    .account-delete:hover { border-color: var(--pink); color: var(--pink); }
    .account-empty { padding: 8px 0; color: var(--muted); font-family: var(--mono-font); font-size: 11px; }
    .account-list-message { margin-top: 8px; }
    .account-list-message:empty { display: none; }
    .auth-footnote { margin: 18px 0 0; color: var(--muted); font-family: var(--mono-font); font-size: 10px; line-height: 1.6; }
    @media (max-width: 480px) { .auth-shell { padding: 18px 0; } .auth-main { padding: 22px 18px; } .auth-main h1 { font-size: 36px; } }