/* =============================================
   Measurement Guide — interactive step-by-step
   ============================================= */

.mg {
  position: fixed; inset: 0;
  z-index: var(--z-modal);
  background: var(--color-bg);
  display: flex; flex-direction: column;
  overflow: hidden;
}

/* ── Top bar ── */
.mg-topbar {
  flex-shrink: 0;
  display: flex; align-items: center; gap: var(--space-md);
  padding: calc(var(--safe-area-top) + var(--space-md)) var(--space-md) var(--space-sm);
}

.mg-close {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; flex-shrink: 0;
  border-radius: var(--radius-full); border: none; background: none;
  color: var(--color-text-secondary); cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}
.mg-close:hover { background: var(--color-primary-bg); color: var(--color-primary); }
.mg-close i { width: 22px; height: 22px; }

.mg-topbar-title {
  flex: 1; text-align: center;
  font-size: var(--font-size-base); font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.mg-counter {
  width: 40px; flex-shrink: 0; text-align: right;
  font-size: var(--font-size-xs); color: var(--color-text-tertiary);
  font-weight: var(--font-weight-medium);
  font-variant-numeric: tabular-nums;
}

/* ── Progress bar ── */
.mg-progress {
  flex-shrink: 0;
  height: 3px; margin: 0 var(--space-md);
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.mg-progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width 400ms var(--ease-spring);
}

/* ── Viewport (step container) ── */
.mg-viewport {
  flex: 1; overflow: hidden; position: relative;
  min-height: 0;
}

.mg-slide {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg) var(--space-md);
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  opacity: 0; transform: translateX(60px);
  transition: opacity 350ms var(--ease-out), transform 350ms var(--ease-out);
  pointer-events: none;
}

.mg-slide.mg-active {
  opacity: 1; transform: translateX(0); pointer-events: auto;
}

.mg-slide.mg-exit-left {
  opacity: 0; transform: translateX(-60px);
}

/* ── Card content ── */
.mg-card {
  width: 100%; max-width: 400px;
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-md);
}

/* ── Body SVG illustration ── */
.mg-body-wrap {
  position: relative;
  width: 130px; height: 220px;
  flex-shrink: 0;
}

.mg-body-svg {
  width: 100%; height: 100%;
}

.mg-body-outline {
  fill: var(--color-primary);
  opacity: 0.1;
  transition: opacity var(--transition-base);
}

.mg-measure-line {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2.5;
  stroke-dasharray: 6 4;
  stroke-linecap: round;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mg-active .mg-measure-line {
  opacity: 1;
  animation: mg-pulse 2s ease-in-out infinite;
}

@keyframes mg-pulse {
  0%, 100% { stroke-opacity: 1; stroke-width: 2.5; }
  50% { stroke-opacity: 0.5; stroke-width: 3.5; }
}

.mg-measure-dot {
  fill: var(--color-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mg-active .mg-measure-dot {
  opacity: 1;
  animation: mg-dot-pulse 2s ease-in-out infinite;
}

@keyframes mg-dot-pulse {
  0%, 100% { r: 4; opacity: 1; }
  50% { r: 6; opacity: 0.6; }
}

.mg-measure-glow {
  fill: var(--color-primary);
  opacity: 0;
}

.mg-active .mg-measure-glow {
  animation: mg-glow 2s ease-in-out infinite;
}

@keyframes mg-glow {
  0%, 100% { opacity: 0; }
  50% { opacity: 0.12; }
}

/* ── Step text ── */
.mg-step-text {
  text-align: center;
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-sm);
}

.mg-step-label {
  font-size: var(--font-size-xs); font-weight: var(--font-weight-semibold);
  text-transform: uppercase; letter-spacing: var(--letter-spacing-wide);
  color: var(--color-primary);
  padding: 3px var(--space-sm);
  background: var(--color-primary-bg);
  border-radius: var(--radius-full);
}

.mg-step-title {
  font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text); margin: 0;
}

.mg-step-desc {
  font-size: var(--font-size-base); color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed); margin: 0;
  max-width: 320px;
}

/* ── Tip callout ── */
.mg-tip {
  display: flex; align-items: flex-start; gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-info-bg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(106, 157, 184, 0.2);
  width: 100%; max-width: 400px;
}

.mg-tip-icon {
  flex-shrink: 0;
  width: 20px; height: 20px;
  color: var(--color-info);
}

.mg-tip-text {
  font-size: var(--font-size-sm); color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.mg-tip-text strong { color: var(--color-text); }

/* ── Intro step ── */
.mg-intro-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 88px; height: 88px; border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary-bg), rgba(160, 120, 80, 0.18));
}
.mg-intro-icon i { width: 44px; height: 44px; color: var(--color-primary); }

.mg-rules {
  display: flex; flex-direction: column; gap: var(--space-md);
  width: 100%; max-width: 360px;
}

.mg-rule {
  display: flex; align-items: flex-start; gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--blur-sm));
}

.mg-rule-num {
  flex-shrink: 0;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  font-size: var(--font-size-sm); font-weight: var(--font-weight-bold);
}

.mg-rule-text {
  font-size: var(--font-size-base); color: var(--color-text);
  line-height: var(--line-height-relaxed);
}

/* ── Photo step ── */
.mg-photos-grid {
  display: flex; gap: var(--space-md);
  width: 100%; max-width: 360px;
  justify-content: center;
}

.mg-photo-card {
  flex: 1;
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--blur-sm));
}

.mg-photo-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-bg);
}
.mg-photo-icon i { width: 24px; height: 24px; color: var(--color-primary); }

.mg-photo-label {
  font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

/* ── Finish step ── */
.mg-finish-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 88px; height: 88px; border-radius: var(--radius-full);
  background: var(--color-success-bg);
}
.mg-finish-icon i { width: 44px; height: 44px; color: var(--color-success); }

.mg-finish-btn {
  min-height: 52px; padding: 0 var(--space-xl);
  border-radius: var(--radius-full); border: none;
  background: var(--gradient-primary); color: var(--color-text-inverse);
  font-size: var(--font-size-md); font-weight: var(--font-weight-semibold);
  font-family: inherit; cursor: pointer;
  display: inline-flex; align-items: center; gap: var(--space-sm);
  box-shadow: var(--shadow-button);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.mg-finish-btn:hover { box-shadow: var(--shadow-button-hover); }
.mg-finish-btn:active { transform: scale(0.97); }
.mg-finish-btn i { width: 20px; height: 20px; }

/* ── Bottom actions ── */
.mg-actions {
  flex-shrink: 0;
  padding: var(--space-md);
  padding-bottom: calc(var(--safe-area-bottom) + var(--space-md));
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  display: flex; gap: var(--space-sm);
  max-width: 480px; width: 100%;
  margin: 0 auto;
}

.mg-btn-back {
  width: 52px; height: 52px; flex-shrink: 0;
  border-radius: var(--radius-full); border: 2px solid var(--color-border-strong);
  background: transparent; color: var(--color-text-secondary);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}
.mg-btn-back:hover {
  border-color: var(--color-primary); color: var(--color-primary);
  background: var(--color-primary-bg);
}
.mg-btn-back i { width: 22px; height: 22px; }
.mg-btn-back.mg-hidden { visibility: hidden; }

.mg-btn-next {
  flex: 1; min-height: 52px;
  padding: 0 var(--space-xl);
  border-radius: var(--radius-full); border: none;
  background: var(--gradient-primary); color: var(--color-text-inverse);
  font-size: var(--font-size-md); font-weight: var(--font-weight-semibold);
  font-family: inherit; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: var(--space-sm);
  box-shadow: var(--shadow-button);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}
.mg-btn-next:hover { box-shadow: var(--shadow-button-hover); }
.mg-btn-next:active { transform: scale(0.97); }
.mg-btn-next i { width: 20px; height: 20px; }

/* ── Slide-in animations ── */
.mg-slide.mg-active .mg-card > * {
  animation: mg-fade-up 400ms var(--ease-out) both;
}
.mg-slide.mg-active .mg-card > *:nth-child(1) { animation-delay: 60ms; }
.mg-slide.mg-active .mg-card > *:nth-child(2) { animation-delay: 140ms; }
.mg-slide.mg-active .mg-card > *:nth-child(3) { animation-delay: 220ms; }
.mg-slide.mg-active .mg-card > *:nth-child(4) { animation-delay: 300ms; }

@keyframes mg-fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 380px) {
  .mg-slide { padding: var(--space-sm) var(--space-md) var(--space-sm); }
  .mg-body-wrap { width: 110px; height: 180px; }
  .mg-step-title { font-size: var(--font-size-xl); }
}

@media (max-height: 640px) {
  .mg-body-wrap { width: 100px; height: 160px; }
  .mg-card { gap: var(--space-md); }
}