:root {
      --bg: #0f172a;
      --panel: #111827;
      --panel-2: #1f2937;
      --text: #e5e7eb;
      --muted: #9ca3af;
      --accent: #38bdf8;
      --accent-2: #22c55e;
      --warning: #f59e0b;
      --danger: #ef4444;
      --border: #334155;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: linear-gradient(135deg, #020617, var(--bg));
      color: var(--text);
      min-height: 100vh;
    }

    header {
      padding: 22px;
      border-bottom: 1px solid var(--border);
      background: rgba(15, 23, 42, 0.95);
      position: sticky;
      top: 0;
      z-index: 10;
    }

    header h1 { margin: 0 0 6px; font-size: 28px; }
    header p { margin: 0; color: var(--muted); }

    main {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 18px;
      padding: 18px;
      max-width: 1450px;
      margin: 0 auto;
    }

    .customer-main {
      display: block;
      max-width: 1280px;
    }

    .start-main {
      display: block;
      max-width: 1000px;
      padding-top: 28px;
    }

    .start-panel {
      display: grid;
      gap: 22px;
    }

    .start-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .start-card {
      display: flex;
      flex-direction: column;
      gap: 8px;
      min-height: 190px;
      padding: 18px;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: #020617;
      color: var(--text);
      text-decoration: none;
    }

    .start-card:hover {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.15);
    }

    .start-card span,
    .eyebrow {
      color: var(--accent);
      font-size: 13px;
      font-weight: bold;
      text-transform: uppercase;
      letter-spacing: 0;
      margin: 0;
    }

    .start-card strong {
      font-size: 24px;
    }

    .start-card p {
      margin: 0;
      color: var(--text);
      line-height: 1.35;
    }

    .start-card small {
      margin-top: auto;
      color: var(--muted);
    }

    .customer-main .panel {
      margin-bottom: 18px;
    }

    .customer-tabs {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-bottom: 18px;
    }

    .panel {
      background: rgba(17, 24, 39, 0.94);
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 18px;
      box-shadow: 0 20px 45px rgba(0,0,0,0.25);
    }

    .client-list, .nav-tabs { display: flex; flex-direction: column; gap: 10px; }

    button, input, textarea, select {
      font: inherit;
      border-radius: 12px;
      border: 1px solid var(--border);
      padding: 10px 12px;
    }

    input, textarea, select {
      width: 100%;
      background: #020617;
      color: var(--text);
      margin: 6px 0 12px;
    }

    textarea { min-height: 90px; resize: vertical; }

    button {
      background: var(--panel-2);
      color: var(--text);
      cursor: pointer;
      border: 1px solid var(--border);
      min-height: 42px;
    }

    button:hover { border-color: var(--accent); }

    .primary { background: var(--accent); color: #00111a; font-weight: bold; border: none; }
    .success { background: var(--accent-2); color: #001407; font-weight: bold; border: none; }
    .warning { background: var(--warning); color: #1a1000; font-weight: bold; border: none; }
    .danger { background: transparent; color: #fecaca; border-color: var(--danger); }

    .client-card, .tab-button { text-align: left; padding: 12px; background: #020617; }
    .client-card.active, .tab-button.active {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.15);
    }

    .top-row {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
    }

    .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .macro-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }

    .calendar-shell {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 14px;
    }

    .calendar-week {
      border: 1px solid var(--border);
      border-radius: 16px;
      overflow: hidden;
      background: #020617;
    }

    .calendar-week-title {
      padding: 10px 12px;
      background: var(--panel-2);
      color: var(--text);
      font-weight: bold;
      border-bottom: 1px solid var(--border);
    }

    .calendar-grid {
      display: grid;
      grid-template-columns: repeat(7, 1fr);
      min-height: 170px;
    }

    .calendar-day {
      min-height: 170px;
      text-align: left;
      background: #020617;
      border: 0;
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      gap: 6px;
      border-radius: 0;
      padding: 10px;
    }

    .calendar-day:last-child {
      border-right: 0;
    }

    .calendar-day span {
      color: var(--muted);
      font-size: 13px;
    }

    .calendar-day strong {
      line-height: 1.25;
    }

    .calendar-day small,
    .calendar-macros {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.25;
    }

    .calendar-event {
      margin-top: 4px;
      padding: 5px 7px;
      border-radius: 8px;
      background: rgba(56, 189, 248, 0.16);
      border: 1px solid rgba(56, 189, 248, 0.35);
      color: var(--text);
      font-size: 12px;
      line-height: 1.25;
    }

    .calendar-day.active {
      background: rgba(56, 189, 248, 0.09);
      box-shadow: inset 0 0 0 2px var(--accent);
    }

    .metric {
      background: #020617;
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 14px;
    }

    .metric span { display: block; color: var(--muted); font-size: 13px; }
    .metric strong { font-size: 24px; }

    .section-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-top: 22px;
      flex-wrap: wrap;
    }

    .card {
      background: #020617;
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 14px;
      margin-bottom: 12px;
    }

    .widget-board {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .widget-card {
      margin-bottom: 0;
    }

    .widget-title-row {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
    }

    .widget-title-row h3 {
      margin-top: 0;
    }

    .widget-actions,
    .widget-picker {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .widget-actions button {
      padding: 7px 9px;
      font-size: 13px;
    }

    .client-list-item {
      border-top: 1px solid var(--border);
      padding-top: 12px;
      margin-top: 12px;
    }

    .client-list-item span {
      display: block;
      margin-top: 4px;
    }

    .appointment-row {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 12px;
      margin-top: 12px;
    }

    .appointment-row p {
      margin: 6px 0 0;
    }

    .exercise-guide-card {
      display: grid;
      grid-template-columns: 180px 1fr;
      gap: 16px;
      align-items: stretch;
    }

    .exercise-image-placeholder {
      min-height: 140px;
      border: 1px dashed var(--border);
      border-radius: 12px;
      background: var(--panel-2);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 8px;
      color: var(--muted);
      text-align: center;
      padding: 12px;
    }

    .appointment-actions {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .calendar-event.pending {
      background: rgba(245, 158, 11, 0.18);
      border-color: rgba(245, 158, 11, 0.45);
    }

    .calendar-event.rejected {
      background: rgba(239, 68, 68, 0.16);
      border-color: rgba(239, 68, 68, 0.42);
    }

    .exercise-row, .data-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
    }

    .food-row {
      display: grid;
      grid-template-columns: 1.5fr 0.7fr 0.7fr 0.7fr 0.7fr;
      gap: 10px;
    }

    .muted { color: var(--muted); }
    .small { font-size: 13px; }

    .video-box { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }

    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 10px;
      overflow: hidden;
      border-radius: 12px;
    }

    th, td {
      border-bottom: 1px solid var(--border);
      padding: 10px;
      text-align: left;
      font-size: 14px;
      vertical-align: top;
    }

    th { color: var(--muted); font-weight: normal; }

    .table-input {
      min-width: 90px;
      margin: 0;
      padding: 7px 8px;
      border-radius: 8px;
      font-size: 13px;
    }

    .table-comment {
      min-width: 220px;
    }

    .pill {
      display: inline-block;
      padding: 4px 8px;
      border-radius: 999px;
      background: var(--panel-2);
      border: 1px solid var(--border);
      font-size: 12px;
      color: var(--muted);
    }

    .diff-positive { color: #86efac; }
    .diff-negative { color: #fca5a5; }

    .chart-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 14px;
    }

    .chart-card {
      height: 310px;
      position: relative;
      overflow: hidden;
    }

    .chart-card h3 { margin-top: 0; }

    .chart-card canvas {
      display: block;
      width: 100%;
      height: 240px !important;
      max-height: 240px;
    }

    @media (max-width: 950px) {
      header { position: static; }
      main { grid-template-columns: 1fr; padding: 12px; }
      .panel { padding: 14px; }
      .grid, .grid-2, .grid-3, .macro-grid, .chart-grid, .customer-tabs, .exercise-guide-card, .start-grid { grid-template-columns: 1fr; }
      .calendar-grid { grid-template-columns: repeat(2, 1fr); }
      .calendar-day { border-right: 0; border-bottom: 1px solid var(--border); }
      .exercise-row, .data-row, .food-row { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 550px) {
      header { padding: 16px; }
      header h1 { font-size: 23px; }
      main { padding: 10px; }
      .client-list, .nav-tabs { gap: 8px; }
      .card, .metric { padding: 12px; }
      .calendar-grid { grid-template-columns: 1fr; }
      .calendar-day { min-height: auto; }
      .appointment-row { flex-direction: column; }
      .appointment-actions { justify-content: flex-start; }
      .exercise-row, .data-row, .food-row { grid-template-columns: 1fr; }
    }