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

:root {
  --bg: #0D0D0F;
  --surface: #1A1A1E;
  --border: #2A2A2E;
  --text: #E8E8EC;
  --text-dim: #6E6E76;
  --amber: #FF9500;
  --amber-dim: rgba(255, 149, 0, 0.15);
  --green: #39FF14;
  --green-dim: rgba(57, 255, 20, 0.12);
  --red: #FF3B30;
  --radius: 12px;
  --radius-sm: 8px;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}

/* ─── Screens ─── */
.screen {
  position: fixed;
  inset: 0;
  display: none;
  flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.screen.active {
  display: flex;
}

/* ─── Permission Modal ─── */
.permission-card {
  text-align: center;
}

.permission-modal-icon {
  margin-bottom: 8px;
}

.permission-list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  text-align: left;
}

.permission-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  color: var(--text);
  font-size: 14px;
}

.permission-list li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--amber);
}

.permission-list li div {
  display: flex;
  flex-direction: column;
}

.permission-list li span {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 2px;
}

.permission-steps {
  text-align: left;
  padding-left: 20px;
  margin: 12px 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
}

.permission-privacy {
  font-size: 13px !important;
  opacity: 0.6;
  margin-top: 4px;
}

/* ─── Buttons ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  background: var(--amber);
  color: #000;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
  min-height: 48px;
}

.btn-primary:active {
  opacity: 0.8;
  transform: scale(0.97);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  min-height: 44px;
}

.btn-secondary:active {
  opacity: 0.7;
  transform: scale(0.97);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}

.btn-icon:active {
  background: var(--surface);
  color: var(--text);
}


/* ─── Top Bar ─── */
.top-bar {
  display: flex;
  align-items: center;
  padding: 8px 8px 0;
  gap: 4px;
  z-index: 10;
}

.top-bar-title {
  font-size: 18px;
  font-weight: 600;
}

.spacer {
  flex: 1;
}

/* ─── Brand ─── */
.brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
  padding: 0 4px;
}

.brand-dot {
  color: var(--amber);
}

.brand-pro {
  color: var(--amber);
}

/* ─── Install App pill ─── */
.btn-install-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  background: var(--amber);
  border: none;
  border-radius: 20px;
  color: #000;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn-install-pill:active {
  opacity: 0.8;
}

/* ─── Mode pill ─── */
.btn-mode-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: border-color 0.15s;
}

.btn-mode-pill:active {
  border-color: var(--amber);
}

#mode-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--amber);
}

/* ─── Angle Readout ─── */
.angle-readout {
  display: flex;
  justify-content: center;
  gap: 40px;
  padding: 16px 16px 0;
}

.angle-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.angle-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text-dim);
}

.angle-value {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
  transition: color 0.3s;
}

/* ─── Tolerance ─── */
.tolerance-row {
  display: flex;
  justify-content: center;
  padding: 8px 16px 0;
  position: relative;
}

.tolerance-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.tolerance-chip:active {
  border-color: var(--amber);
  color: var(--text);
}

.tolerance-picker {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  margin-top: 8px;
  z-index: 20;
  display: flex;
  flex-direction: column;
  min-width: 160px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.tolerance-option {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 14px;
  text-align: left;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
}

.tolerance-option:active,
.tolerance-option.active {
  background: var(--amber-dim);
  color: var(--amber);
}

/* ─── Vial Container ─── */
.vial-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.vial {
  position: relative;
  width: min(300px, 80vw);
  height: min(300px, 80vw);
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #1E1E24, #121214);
  border: 2px solid var(--border);
  box-shadow:
    inset 0 2px 20px rgba(0, 0, 0, 0.6),
    inset 0 0 60px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.03);
  overflow: hidden;
  transition: border-color 0.4s, box-shadow 0.4s;
}

.vial.is-level {
  border-color: var(--green);
  box-shadow:
    inset 0 2px 20px rgba(0, 0, 0, 0.6),
    inset 0 0 60px rgba(0, 0, 0, 0.3),
    0 0 20px rgba(57, 255, 20, 0.15),
    0 0 60px rgba(57, 255, 20, 0.06);
}

/* Center crosshair marks */
.vial-center-mark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  transform: translate(-50%, -50%);
  border: 2px solid var(--border);
  border-radius: 50%;
  pointer-events: none;
}

.vial-center-mark::before,
.vial-center-mark::after {
  content: '';
  position: absolute;
  background: var(--border);
}

.vial-center-mark::before {
  top: 50%;
  left: -20px;
  right: -20px;
  height: 1px;
}

.vial-center-mark::after {
  left: 50%;
  top: -20px;
  bottom: -20px;
  width: 1px;
}

/* Plumb mode — vial becomes a tall rectangle */
.vial.plumb {
  border-radius: var(--radius);
  width: min(120px, 30vw);
  height: min(360px, 70vh);
}

.vial.plumb .vial-center-mark {
  width: 80px;
  height: 2px;
  border: none;
  background: var(--border);
  border-radius: 1px;
}

.vial.plumb .vial-center-mark::before {
  display: none;
}

.vial.plumb .vial-center-mark::after {
  left: 50%;
  top: -30px;
  bottom: -30px;
  width: 1px;
}

/* ─── Bubble ─── */
.bubble {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255, 190, 80, 0.6), rgba(255, 149, 0, 0.25));
  border: 1.5px solid rgba(255, 149, 0, 0.5);
  box-shadow:
    0 0 16px rgba(255, 149, 0, 0.2),
    inset 0 -2px 6px rgba(0, 0, 0, 0.3),
    inset 0 2px 4px rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  transform: translate(-50%, -50%);
  transition: background 0.4s, border-color 0.4s, box-shadow 0.4s;
  will-change: transform;
}

.bubble.is-level {
  background: radial-gradient(circle at 35% 30%, rgba(80, 255, 80, 0.6), rgba(57, 255, 20, 0.25));
  border-color: rgba(57, 255, 20, 0.6);
  box-shadow:
    0 0 24px rgba(57, 255, 20, 0.3),
    inset 0 -2px 6px rgba(0, 0, 0, 0.3),
    inset 0 2px 4px rgba(255, 255, 255, 0.1);
}

.vial.plumb .bubble {
  width: 80px;
  height: 36px;
  border-radius: 18px;
}

/* ─── Level Status ─── */
.level-status {
  text-align: center;
  padding: 8px 16px;
}

#level-text {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  transition: color 0.3s;
}

#level-text.is-level {
  color: var(--green);
}

/* ─── Action Row ─── */
.action-row {
  display: flex;
  gap: 12px;
  padding: 0 16px;
  justify-content: center;
  flex-shrink: 0;
}

.action-row .btn-secondary {
  flex: 1;
  max-width: 200px;
}

/* ─── App Footer ─── */
.app-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  padding-bottom: calc(14px + env(safe-area-inset-bottom));
  flex-shrink: 0;
}

.footer-tagline {
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.4;
  max-width: 280px;
  opacity: 0.7;
}

.btn-coffee {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

.btn-coffee:active {
  border-color: #FFDD00;
  color: #FFDD00;
}

.hidden {
  display: none !important;
}

/* ─── Journal ─── */
.journal-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  -webkit-overflow-scrolling: touch;
}

.journal-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  text-align: center;
  gap: 8px;
  padding: 32px;
}

.journal-empty svg {
  opacity: 0.3;
  margin-bottom: 8px;
}

.project-group {
  margin-bottom: 24px;
}

.project-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.project-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--amber);
  flex: 1;
}

.project-actions {
  display: flex;
  gap: 4px;
}

.btn-project-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.btn-project-action:active {
  color: var(--amber);
  border-color: var(--amber);
}

/* ─── Delta badge ─── */
.delta-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.delta-improved {
  background: var(--green-dim);
  color: var(--green);
}

.delta-worse {
  background: rgba(255, 59, 48, 0.12);
  color: var(--red);
}

/* ─── Measurement Card ─── */
.measurement-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.measurement-info {
  flex: 1;
  min-width: 0;
}

.measurement-label-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.measurement-label {
  font-size: 15px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.measurement-angles {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  color: var(--text-dim);
}

.measurement-time {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

.measurement-location {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.measurement-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.measurement-delete,
.btn-share-measurement {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px;
  font-size: 18px;
  line-height: 1;
}

.measurement-delete:active {
  color: var(--red);
}

.btn-share-measurement:active {
  color: var(--amber);
}

/* ─── Photo thumbnail in journal ─── */
.measurement-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  cursor: pointer;
  flex-shrink: 0;
  border: 1px solid var(--border);
}

/* ─── Tag badges ─── */
.tag-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}

.tag-before {
  background: var(--amber);
  color: #000;
}

.tag-after {
  background: var(--green);
  color: #000;
}

/* ─── Photo overlay (full-screen) ─── */
.photo-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.photo-overlay img {
  max-width: 95vw;
  max-height: 90vh;
  border-radius: var(--radius);
  object-fit: contain;
}

.photo-overlay-close {
  position: absolute;
  top: calc(16px + env(safe-area-inset-top));
  right: 16px;
  background: none;
  border: none;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
  padding: 8px;
}

/* ─── Modals ─── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 24px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
  max-height: 90vh;
  overflow-y: auto;
}

.modal-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
}

.modal-reading {
  display: flex;
  gap: 16px;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.modal-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.modal-label input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 16px;
  outline: none;
  transition: border-color 0.15s;
}

.modal-label input:focus {
  border-color: var(--amber);
}

.modal-label input::placeholder {
  color: var(--text-dim);
  opacity: 0.5;
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.modal-actions .btn-secondary,
.modal-actions .btn-primary {
  flex: 1;
}

/* ─── Tag toggle in save modal ─── */
.tag-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.tag-row-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
}

.tag-toggle {
  display: flex;
  gap: 6px;
}

.tag-btn {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: none;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}

.tag-btn:active {
  transform: scale(0.95);
}

.tag-btn[data-tag="before"].active {
  background: var(--amber);
  border-color: var(--amber);
  color: #000;
}

.tag-btn[data-tag="after"].active {
  background: var(--green);
  border-color: var(--green);
  color: #000;
}

/* ─── Photo row in save modal ─── */
.photo-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.btn-photo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.btn-photo:active {
  border-color: var(--amber);
  color: var(--text);
}

.photo-preview {
  display: flex;
  align-items: center;
  gap: 6px;
}

.photo-thumb-preview {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--border);
}

.btn-clear-photo {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}

.btn-clear-photo:active {
  color: var(--red);
}

/* ─── PRO badge on journal button ─── */
.btn-journal-pro {
  position: relative;
}

.pro-badge {
  position: absolute;
  top: 4px;
  right: 2px;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: var(--amber);
  color: #000;
  padding: 1px 4px;
  border-radius: 3px;
  line-height: 1.2;
  pointer-events: none;
}

/* ─── Save button with icon ─── */
.btn-save-pro {
  display: inline-flex;
  align-items: center;
}

/* ─── Upgrade Modal ─── */
.upgrade-card {
  text-align: center;
}

.upgrade-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 8px;
}

.upgrade-header h3 {
  margin-bottom: 0;
}

.upgrade-pro-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--amber), #FFB340);
  color: #000;
  padding: 4px 10px;
  border-radius: 6px;
}

.upgrade-subtitle {
  font-size: 14px;
  margin-bottom: 16px;
}

.upgrade-price {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  padding: 12px 0 4px;
  color: var(--amber);
}

.upgrade-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-dim);
}

.modal-card p {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.5;
}

.upgrade-features {
  list-style: none;
  padding: 0;
  margin: 0 0 4px;
  text-align: left;
}

.upgrade-features li {
  color: var(--text-dim);
  font-size: 14px;
  padding: 5px 0;
  padding-left: 24px;
  position: relative;
  line-height: 1.4;
}

.upgrade-features li strong {
  color: var(--text);
}

.upgrade-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
  font-size: 14px;
}

/* ─── Calibration flash ─── */
@keyframes calibrate-flash {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

.calibrate-toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--surface);
  border: 1px solid var(--amber);
  color: var(--amber);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  pointer-events: none;
  animation: calibrate-flash 1s ease-out forwards;
  z-index: 200;
}