/* Base layout & resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--canvas-soft);
  background-image: radial-gradient(at 0% 0%, rgba(15, 76, 129, 0.03) 0px, transparent 50%),
                    radial-gradient(at 50% 0%, rgba(22, 163, 74, 0.02) 0px, transparent 50%),
                    radial-gradient(at 100% 100%, rgba(15, 76, 129, 0.03) 0px, transparent 50%);
  color: var(--ink);
  line-height: 1.5;
  padding: var(--sp-lg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app-container {
  width: 100%;
  max-width: 800px;
  background-color: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-premium);
  margin-bottom: var(--sp-xl);
}

/* Stepper progress indicator header */
.stepper-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  margin-bottom: var(--sp-xl);
  padding-bottom: var(--sp-base);
  border-bottom: 1px solid var(--hairline);
}

.stepper-connector {
  position: absolute;
  top: 20px;
  left: 40px;
  right: 40px;
  height: 2px;
  background-color: var(--hairline-strong);
  z-index: 1;
}

.stepper-progress-line {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--semantic-success));
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 8px rgba(15, 76, 129, 0.3);
}

.step-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
  flex: 1;
}

.step-pill {
  width: 40px;
  height: 40px;
  border-radius: var(--r-pill);
  background-color: var(--surface-strong);
  color: var(--body);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  border: 2px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.step-indicator.active .step-pill {
  background-color: var(--primary);
  color: var(--on-primary);
  border-color: var(--primary);
  box-shadow: var(--focus-glow);
}

.step-indicator.done .step-pill {
  background-color: var(--semantic-success);
  color: var(--on-primary);
  border-color: var(--semantic-success);
  box-shadow: var(--focus-glow-success);
}

.step-indicator.future .step-pill {
  background-color: var(--surface-strong);
  color: var(--muted);
}

.step-label {
  margin-top: var(--sp-xs);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.88px;
  color: var(--muted);
  text-align: center;
  transition: color 0.2s ease;
}

.step-indicator.active .step-label {
  color: var(--primary);
}

.step-indicator.done .step-label {
  color: var(--semantic-success);
}

/* Forms layout & controls */
.form-step {
  display: block;
}

.form-step.hidden {
  display: none;
}

.form-step-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--sp-lg);
  color: var(--ink);
}

.form-group {
  margin-bottom: var(--sp-md);
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--sp-xs);
  display: inline-block;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink);
  background-color: var(--canvas);
  outline: none;
  transition: border-color 0.2s cubic-bezier(0.4, 0, 0.2, 1), 
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.2s ease;
}

.form-group input {
  height: 44px;
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-group input[readonly],
.form-group textarea[readonly],
.form-group select[readonly],
.form-group input:disabled,
.form-group textarea:disabled,
.form-group select:disabled {
  background-color: var(--surface-strong);
  color: var(--muted);
  cursor: not-allowed;
  border-color: var(--hairline);
}

.time-range-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-xs);
}

.form-sub-label {
  font-size: 12px !important;
  color: var(--muted) !important;
  margin-bottom: var(--sp-xs);
  display: block;
}

.form-group select {
  height: 44px;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: 40px;
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
  border-color: var(--muted);
  box-shadow: var(--shadow-sm);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: var(--focus-glow);
}

/* Error states */
.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
  border-color: var(--semantic-error);
}

.form-group.has-error input:focus,
.form-group.has-error textarea:focus,
.form-group.has-error select:focus {
  box-shadow: var(--focus-glow-error);
}

.error-text {
  font-size: 12px;
  color: var(--semantic-error);
  margin-top: 4px;
  display: none;
  font-weight: 500;
}

.form-group.has-error .error-text {
  display: block;
}

.char-count {
  font-size: 11px;
  color: var(--muted);
  text-align: right;
  margin-top: 4px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.char-count.limit-reached {
  color: var(--semantic-error);
}

/* Photo Upload Elements */
.upload-container {
  border: 2px dashed var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: var(--sp-xl);
  text-align: center;
  background-color: var(--canvas-soft);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
  position: relative;
  user-select: none;
}

.upload-container:focus-visible {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--focus-glow);
  background-color: var(--primary-light);
}

.upload-container:hover,
.upload-container.dragover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.upload-container:active {
  transform: translateY(0) scale(0.99);
}

.upload-icon {
  font-size: 32px;
  margin-bottom: var(--sp-sm);
  display: block;
}

.upload-text {
  font-size: 14px;
  color: var(--body);
}

.upload-text strong {
  color: var(--primary);
  text-decoration: underline;
}

.upload-hint {
  font-size: 12px;
  color: var(--muted);
  margin-top: var(--sp-xs);
}

#photo-input {
  display: none;
}

/* Uploaded Photos Grid */
.photos-grid-wrapper {
  margin-top: var(--sp-lg);
}

.photos-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--sp-sm);
}

.photos-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.photos-badge {
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.88px;
  border-radius: var(--r-pill);
  padding: 4px 10px;
}

.photos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-sm);
}

.photo-thumb-container {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--hairline-strong);
  background-color: var(--canvas-soft);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
}

.photo-thumb-container:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.photo-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-delete-btn {
  position: absolute;
  top: 2px;
  right: 2px;
  background-color: rgba(15, 76, 129, 0.9);
  color: var(--on-primary);
  border: 4px solid transparent;
  background-clip: padding-box;
  width: 44px;
  height: 44px;
  border-radius: var(--r-pill);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, transform 0.2s ease;
  backdrop-filter: blur(4px);
  z-index: 10;
}

.photo-delete-btn:hover {
  background-color: var(--semantic-error);
  transform: scale(1.1);
}

/* Navigation buttons footer */
.stepper-actions {
  display: flex;
  justify-content: space-between;
  margin-top: var(--sp-xl);
  padding-top: var(--sp-lg);
  border-top: 1px solid var(--hairline);
  gap: var(--sp-base);
}

button.btn {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--r-md);
  height: 44px;
  padding: 0 var(--sp-lg);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), 
              background-color 0.2s ease, 
              border-color 0.2s ease, 
              box-shadow 0.2s ease;
  border: 1px solid transparent;
  outline: none;
  user-select: none;
}

button.btn:hover:not(:disabled) {
  transform: translateY(-2px);
}

button.btn:active:not(:disabled) {
  transform: translateY(0) scale(0.97);
}

button.btn-primary {
  background-color: var(--primary);
  color: var(--on-primary);
}

button.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  box-shadow: 0 6px 16px rgba(15, 76, 129, 0.25);
}

button.btn-primary:focus-visible {
  box-shadow: var(--focus-glow);
}

button.btn-secondary {
  background-color: var(--canvas);
  color: var(--primary);
  border-color: var(--hairline-strong);
}

button.btn-secondary:hover:not(:disabled) {
  background-color: var(--primary-light);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

button.btn-secondary:focus-visible {
  box-shadow: var(--focus-glow);
}

button.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-icon-left {
  margin-right: var(--sp-xs);
}

.btn-icon-right {
  margin-left: var(--sp-xs);
}

/* Responsive grid changes */
@media (max-width: 640px) {
  body {
    padding: var(--sp-sm);
  }

  .app-container {
    padding: var(--sp-md);
  }

  .stepper-header {
    margin-bottom: var(--sp-lg);
  }

  .stepper-connector {
    left: 20px;
    right: 20px;
  }

  .step-pill {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }

  .step-label {
    font-size: 9px;
  }

  .photos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Step 1 Desktop Grid Optimization */
@media (min-width: 641px) {
  .form-grid-step1 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-sm) var(--sp-lg);
  }
  
  .form-grid-step1 .full-width {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    background-attachment: scroll !important;
    scroll-behavior: auto !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
  
  .upload-container:hover,
  .photo-thumb-container:hover,
  button.btn:hover:not(:disabled) {
    transform: none !important;
  }
}