/* ================================================
   GRIP TRAINER — Deep Dark Fantasy ♂ Edition
   ================================================ */

   * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  :root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a2e;
    --accent: #e94560;
    --accent-glow: rgba(233, 69, 96, 0.3);
    --gold: #f5c518;
    --gold-glow: rgba(245, 197, 24, 0.3);
    --green: #00e676;
    --green-glow: rgba(0, 230, 118, 0.3);
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --text-muted: #555;
    --border: #2a2a3e;
  }
  
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
  }
  
  /* ===== Header ===== */
  .header {
    text-align: center;
    padding: 30px 20px 10px;
    width: 100%;
    max-width: 480px;
  }
  
  .header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  
  .header .subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 2px;
  }
  
  /* ===== Tab Navigation ===== */
  .tab-nav {
    display: flex;
    width: 100%;
    max-width: 480px;
    padding: 0 20px;
    margin: 16px 0;
  }
  
  .tab-btn {
    flex: 1;
    padding: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s;
  }
  
  .tab-btn:first-child {
    border-radius: 8px 0 0 8px;
  }
  
  .tab-btn:last-child {
    border-radius: 0 8px 8px 0;
  }
  
  .tab-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    font-weight: 600;
  }
  
  /* ===== Container ===== */
  .container {
    width: 100%;
    max-width: 480px;
    padding: 0 20px 30px;
    flex: 1;
  }
  
  .tab-content {
    display: none;
  }
  
  .tab-content.active {
    display: block;
  }
  
  /* ===== Timer Ring ===== */
  .timer-ring-container {
    display: flex;
    justify-content: center;
    margin: 20px 0;
  }
  
  .timer-ring {
    width: 220px;
    height: 220px;
    position: relative;
  }
  
  .timer-ring svg {
    transform: rotate(-90deg);
    width: 220px;
    height: 220px;
  }
  
  .ring-bg {
    fill: none;
    stroke: var(--bg-card);
    stroke-width: 8;
  }
  
  .ring-progress {
    fill: none;
    stroke: var(--accent);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 628.32;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.3s linear, stroke 0.3s;
    filter: drop-shadow(0 0 6px var(--accent-glow));
  }
  
  .ring-progress.rest {
    stroke: var(--green);
    filter: drop-shadow(0 0 6px var(--green-glow));
  }
  
  .timer-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
  }
  
  .timer-seconds {
    font-size: 3.2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1;
  }
  
  .timer-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 2px;
  }
  
  .timer-phase {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 8px;
    padding: 3px 14px;
    border-radius: 20px;
    display: inline-block;
  }
  
  .timer-phase.work {
    background: rgba(233, 69, 96, 0.15);
    color: var(--accent);
  }
  
  .timer-phase.rest {
    background: rgba(0, 230, 118, 0.15);
    color: var(--green);
  }
  
  .timer-phase.done {
    background: rgba(245, 197, 24, 0.15);
    color: var(--gold);
  }
  
  /* ===== Rep Dots (current group) ===== */
  .rep-dots-container {
    text-align: center;
    margin: 12px 0;
  }
  
  .rep-dots-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
  }
  
  .rep-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
  }
  
  .rep-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
  }
  
  .rep-dot.completed {
    background: var(--green);
    border-color: var(--green);
    box-shadow: 0 0 8px var(--green-glow);
  }
  
  .rep-dot.current {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    animation: pulse-dot 1s infinite;
  }
  
  @keyframes pulse-dot {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.25); }
  }
  
  /* ===== Progress Cards ===== */
  .progress-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 16px 0;
  }
  
  .progress-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 8px;
    text-align: center;
  }
  
  .progress-card .value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gold);
  }
  
  .progress-card .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
  }
  
  /* ===== Buttons ===== */
  .btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 20px 0;
  }
  
  .btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .btn:active {
    transform: scale(0.96);
  }
  
  .btn-primary {
    background: linear-gradient(135deg, var(--accent), #c0392b);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
  }
  
  .btn-primary:hover {
    box-shadow: 0 6px 25px var(--accent-glow);
  }
  
  .btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
  }
  
  .btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
  }
  
  .btn-secondary:hover {
    border-color: var(--text-muted);
  }
  
  .btn-danger {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 8px 16px;
    font-size: 0.8rem;
  }
  
  .btn-small {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 8px;
  }
  
  /* ===== Today Overview ===== */
  .today-overview {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
    text-align: center;
  }
  
  .today-overview h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
  }
  
  .set-progress-bar {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
  }
  
  .set-block {
    width: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
  }
  
  .set-block-bar {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    overflow: hidden;
  }
  
  .set-block-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--green);
    transition: width 0.3s;
  }
  
  .set-block-fill.partial {
    background: var(--gold);
  }
  
  .set-block-label {
    font-size: 0.6rem;
    color: var(--text-muted);
  }
  
  .overview-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
  }
  
  .overview-text .highlight {
    color: var(--gold);
    font-weight: 700;
  }
  
  .overview-text .complete {
    color: var(--green);
    font-weight: 700;
  }
  
  /* ===== History ===== */
  .history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
  }
  
  .history-header h2 {
    font-size: 1.1rem;
  }
  
  .streak-badge {
    padding: 6px 14px;
    background: rgba(245, 197, 24, 0.1);
    border: 1px solid rgba(245, 197, 24, 0.2);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--gold);
    font-weight: 600;
  }
  
  .calendar-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
  }
  
  .calendar-month-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-weight: 600;
  }
  
  .calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
  }
  
  .calendar-day-header {
    font-size: 0.6rem;
    color: var(--text-muted);
    text-align: center;
    padding: 2px;
  }
  
  .calendar-cell {
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--bg-secondary);
    min-width: 14px;
  }
  
  .calendar-cell.empty { background: transparent; }
  .calendar-cell.level-1 { background: rgba(0, 230, 118, 0.2); }
  .calendar-cell.level-2 { background: rgba(0, 230, 118, 0.4); }
  .calendar-cell.level-3 { background: rgba(0, 230, 118, 0.6); }
  .calendar-cell.level-4 { background: rgba(0, 230, 118, 0.8); }
  .calendar-cell.level-5 { background: var(--green); }
  
  .calendar-cell.today {
    outline: 2px solid var(--gold);
    outline-offset: 1px;
  }
  
  .history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
  }
  
  .history-item .date {
    font-size: 0.9rem;
    font-weight: 600;
  }
  
  .history-item .weekday {
    font-size: 0.75rem;
    color: var(--text-muted);
  }
  
  .history-item .stats {
    text-align: right;
  }
  
  .history-item .reps {
    font-size: 1rem;
    font-weight: 700;
    color: var(--green);
  }
  
  .history-item .reps.full-complete {
    color: var(--gold);
  }
  
  .history-item .sets-info {
    font-size: 0.7rem;
    color: var(--text-muted);
  }
  
  /* ===== Settings ===== */
  .settings-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
  }
  
  .settings-section h3 {
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: var(--text-secondary);
  }
  
  .setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
  }
  
  .setting-row:not(:last-child) {
    border-bottom: 1px solid var(--border);
  }
  
  .setting-label {
    font-size: 0.85rem;
  }
  
  .setting-value {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .setting-value input[type="number"] {
    width: 64px;
    padding: 6px 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-align: center;
  }
  
  .setting-value input[type="number"]:focus {
    outline: none;
    border-color: var(--accent);
  }
  
  .setting-unit {
    font-size: 0.75rem;
    color: var(--text-muted);
  }
  
  /* ===== Toast ===== */
  .toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 0.85rem;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
    white-space: nowrap;
  }
  
  .toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
  
  /* ===== Confetti ===== */
  .confetti-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 999;
  }
  
  /* ===== Responsive ===== */
  @media (max-width: 380px) {
    .timer-ring, .timer-ring svg { width: 180px; height: 180px; }
    .timer-seconds { font-size: 2.6rem; }
    .progress-card .value { font-size: 1.1rem; }
  }