/* ============================================
   DESIGN TOKENS (CSS Custom Properties)
   ============================================ */
:root {
  /* Colors - Primary */
  --color-primary: #0B63CE;
  --color-primary-dark: #0a5bb8;
  --color-primary-darker: #0950a0;
  --color-primary-light: #a9c2e5;
  --color-primary-alpha-10: rgba(11, 99, 206, 0.1);
  --color-primary-alpha-15: rgba(11, 99, 206, 0.15);
  --color-primary-alpha-20: rgba(11, 99, 206, 0.2);
  --color-primary-alpha-25: rgba(11, 99, 206, 0.25);
  --color-primary-alpha-30: rgba(11, 99, 206, 0.3);
  --color-primary-alpha-50: rgba(11, 99, 206, 0.5);
  --color-primary-alpha-80: rgba(11, 99, 206, 0.08);

  /* Colors - Semantic */
  --color-success: #27ae60;
  --color-success-light: #f0fdf4;
  --color-error: #e74c3c;
  --color-error-dark: #c0392b;
  --color-error-light: #fef2f2;
  --color-warning: #f39c12;
  --color-info: #3498db;

  /* Colors - Neutral */
  --color-text-primary: #2c3e50;
  --color-text-secondary: #34495e;
  --color-text-tertiary: #5a6c7d;
  --color-text-muted: #7f8c8d;
  --color-text-disabled: #95a5a6;
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-tertiary: #e9ecef;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);
  --color-border: #e1e8ed;
  --color-border-light: rgba(11, 99, 206, 0.1);

  /* Typography */
  --font-family-body: "M PLUS Rounded 1c", "Kosugi Maru", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic Medium", "游ゴシック Medium", "YuGothic", "游ゴシック体", "Noto Sans JP", "メイリオ", Meiryo, sans-serif;
  --font-family-heading: "Noto Serif JP", "Shippori Mincho", "Hiragino Mincho ProN", "ヒラギノ明朝 ProN", "Yu Mincho", "游明朝", serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --line-height-tight: 1.4;
  --line-height-normal: 1.7;
  --line-height-relaxed: 1.8;
  --letter-spacing-tight: 0.2px;
  --letter-spacing-normal: 0.3px;
  --letter-spacing-wide: 0.5px;
  --letter-spacing-wider: 0.8px;
  --letter-spacing-widest: 1px;

  /* Spacing Scale (4px base) */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 28px;
  --spacing-4xl: 32px;
  --spacing-5xl: 36px;
  --spacing-6xl: 40px;
  --spacing-7xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-2xl: 0 6px 24px rgba(0, 0, 0, 0.12);
  --shadow-primary: 0 2px 8px rgba(11, 99, 206, 0.25);
  --shadow-primary-lg: 0 4px 12px rgba(11, 99, 206, 0.35);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.8);

  /* Transitions */
  --transition-fast: 0.1s ease;
  --transition-base: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-bounce: cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;

  /* Focus Styles */
  --focus-ring-width: 3px;
  --focus-ring-color: var(--color-primary-alpha-30);
  --focus-ring-offset: 2px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-body);
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
  background-attachment: fixed;
  padding: var(--spacing-6xl) var(--spacing-xl);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  line-height: var(--line-height-normal);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  font-weight: var(--font-weight-normal);
}

/* Japanese-inspired background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, var(--color-primary-alpha-10) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, var(--color-primary-alpha-10) 0%, transparent 50%),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 2px,
      rgba(11, 99, 206, 0.01) 2px,
      rgba(11, 99, 206, 0.01) 4px
    );
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

/* Artistic font styling for emphasis */
strong, b {
  font-family: "Noto Serif JP", "Shippori Mincho", serif;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* Decorative text elements */
.decorative-text {
  font-family: "Noto Serif JP", "Shippori Mincho", serif;
  font-weight: 600;
  letter-spacing: 1px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

h2 {
  font-family: "Noto Serif JP", "Shippori Mincho", "Hiragino Mincho ProN", "ヒラギノ明朝 ProN", "Yu Mincho", "游明朝", serif;
  font-size: 24px;
  color: #1a5490;
  border-left: 5px solid #0B63CE;
  padding: 20px 24px;
  margin: 0 0 32px 0;
  background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
  border-radius: 8px;
  font-weight: 700;
  letter-spacing: 1px;
  box-shadow: 
    0 2px 8px rgba(11, 99, 206, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
  text-shadow: 0 1px 2px rgba(11, 99, 206, 0.1);
}

/* Decorative corner elements */
h2::before {
  content: '◆';
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 12px;
  color: rgba(11, 99, 206, 0.15);
  font-weight: normal;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(11, 99, 206, 0.1) 20%,
    rgba(11, 99, 206, 0.3) 50%,
    rgba(11, 99, 206, 0.1) 80%,
    transparent 100%
  );
}

.container {
  max-width: 680px;
  margin: 0 auto;
  background: #ffffff;
  padding: 32px 36px;
  border: 2px solid rgba(11, 99, 206, 0.15);
  border-radius: 12px;
  box-shadow: 
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 0 0 1px rgba(255, 255, 255, 0.5) inset,
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

/* Decorative border pattern */
.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid transparent;
  border-radius: 12px;
  background: linear-gradient(135deg, 
    rgba(11, 99, 206, 0.05) 0%,
    transparent 30%,
    transparent 70%,
    rgba(11, 99, 206, 0.05) 100%
  );
  pointer-events: none;
  z-index: 0;
}

/* Decorative corner accents */
.container::after {
  content: '';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 40px;
  height: 40px;
  background: radial-gradient(circle, rgba(11, 99, 206, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.container:hover {
  box-shadow: 
    0 6px 24px rgba(0, 0, 0, 0.12),
    0 0 0 1px rgba(255, 255, 255, 0.5) inset,
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
  border-color: rgba(11, 99, 206, 0.25);
  transform: translateY(-2px);
}

.container > * {
  position: relative;
  z-index: 1;
}

.form-row {
  margin-bottom: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  position: relative;
  padding-bottom: 12px;
}

label {
  display: inline-block;
  min-width: 140px;
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  font-weight: 700;
  color: #34495e;
  font-size: 15px;
  letter-spacing: 0.5px;
  padding-top: 12px;
  position: relative;
  padding-left: 24px;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}

/* Decorative bullet for labels */
label::before {
  content: '▸';
  position: absolute;
  left: 0;
  top: 12px;
  color: #0B63CE;
  font-size: 14px;
  font-weight: bold;
}

/* Custom File Input with Drag & Drop */
.file-upload-area {
  flex: 1;
  position: relative;
}

.file-drop-zone {
  border: 2px dashed #cbd5e0;
  border-radius: 8px;
  padding: 32px 20px;
  text-align: center;
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

/* Decorative pattern overlay */
.file-drop-zone::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 10px,
      rgba(11, 99, 206, 0.02) 10px,
      rgba(11, 99, 206, 0.02) 20px
    );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.file-drop-zone:hover::before {
  opacity: 1;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
  border-color: #0B63CE;
  background: #f0f7ff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(11, 99, 206, 0.15);
}

.file-drop-zone.has-file {
  border-color: #27ae60;
  background: #f0fdf4;
  border-style: solid;
  padding: 20px;
}

.file-drop-zone-icon {
  font-size: 48px;
  margin-bottom: 12px;
  display: block;
}

.file-drop-zone-text {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  font-size: 15px;
  color: #5a6c7d;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.file-drop-zone-hint {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  font-size: 13px;
  color: #95a5a6;
  margin-top: 4px;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.file-info {
  display: none;
  margin-top: 12px;
  padding: 12px 16px;
  background: #ffffff;
  border-radius: 6px;
  border: 1px solid #e1e8ed;
}

.file-info.show {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.file-name {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  font-weight: 800;
  color: #2c3e50;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.3px;
}

.file-size {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  font-size: 13px;
  color: #7f8c8d;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.file-remove {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  margin-left: auto;
  background: #e74c3c;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.3px;
}

.file-remove:hover {
  background: #c0392b;
  transform: scale(1.05);
}

input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  top: 0;
  left: 0;
}

select {
  flex: 1;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-right: var(--spacing-5xl);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: var(--font-family-body);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  color: var(--color-text-primary);
  transition: all var(--transition-base);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%230B63CE' d='M7 10L2 5h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) center;
  position: relative;
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-normal);
  min-height: 44px; /* Touch-friendly */
  box-shadow: var(--shadow-sm);
  -webkit-appearance: none;
  -moz-appearance: none;
}

/* Remove arrow for select inside wrapper */
.select-wrapper select {
  background-image: none;
}

/* Visual feedback for selected value */
select:not([value=""]):not(:invalid) {
  border-color: var(--color-primary-alpha-20);
  background: linear-gradient(135deg, rgba(11, 99, 206, 0.02) 0%, var(--color-bg-primary) 100%);
}

select:not([value=""]):not(:invalid):hover {
  border-color: var(--color-primary);
}

/* Empty/placeholder state */
select:invalid,
select[value=""] {
  color: var(--color-text-muted);
}

select:invalid option:not([value=""]),
select[value=""] option:not([value=""]) {
  color: var(--color-text-primary);
}

/* Loading state for select */
select[disabled] {
  position: relative;
}

select[disabled]::before {
  content: '';
  position: absolute;
  right: var(--spacing-5xl);
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-primary-alpha-20);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

select:hover {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(11, 99, 206, 0.02) 0%, var(--color-bg-primary) 100%);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

select:disabled {
  background: var(--color-bg-secondary);
  color: var(--color-text-disabled);
  cursor: not-allowed;
  opacity: 0.6;
}

select option {
  font-family: var(--font-family-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: none;
  min-height: 44px; /* Touch-friendly */
  line-height: var(--line-height-normal);
  transition: all var(--transition-base);
}

/* Enhanced option styling for better browser support */
select option:hover {
  background: linear-gradient(135deg, var(--color-primary-alpha-10) 0%, rgba(11, 99, 206, 0.05) 100%);
  color: var(--color-primary-dark);
  font-weight: var(--font-weight-semibold);
  padding-left: calc(var(--spacing-lg) + var(--spacing-xs));
}

select option:checked,
select option:focus {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  font-weight: var(--font-weight-bold);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

select option:disabled {
  color: var(--color-text-disabled);
  background: var(--color-bg-secondary);
  cursor: not-allowed;
  opacity: 0.5;
}

/* Placeholder option styling */
select option[value=""],
select option:first-child {
  color: var(--color-text-muted);
  font-style: italic;
}

select option[value=""]:checked,
select option:first-child:checked {
  color: rgba(255, 255, 255, 0.8);
  font-style: normal;
}

/* Custom select wrapper for enhanced styling */
.select-wrapper {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.select-wrapper::after {
  content: '';
  position: absolute;
  right: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--color-primary);
  pointer-events: none;
  z-index: 2;
  transition: all var(--transition-base);
}

.select-wrapper:hover::after {
  border-top-color: var(--color-primary-dark);
  transform: translateY(-50%) scale(1.1);
}

.select-wrapper:focus-within::after {
  border-top-color: var(--color-primary-dark);
  transform: translateY(-50%) rotate(180deg);
}

/* Remove default arrow when inside wrapper */
.select-wrapper select {
  background-image: none;
  padding-right: var(--spacing-5xl);
}

/* Enhanced select styling when in wrapper */
.select-wrapper select {
  width: 100%;
}

button {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  background: linear-gradient(135deg, #0B63CE 0%, #0a5bb8 100%);
  color: white;
  padding: 12px 28px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 
    0 2px 8px rgba(11, 99, 206, 0.25),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset,
    0 1px 0 rgba(255, 255, 255, 0.2) inset;
  transform: translateY(0);
  letter-spacing: 1px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Decorative shine effect */
button::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

button:hover:not(:disabled)::after {
  left: 100%;
}

button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

button:hover:not(:disabled) {
  background: linear-gradient(135deg, #0a5bb8 0%, #0950a0 100%);
  transform: translateY(-2px);
  box-shadow: 
    0 4px 12px rgba(11, 99, 206, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.15) inset,
    0 1px 0 rgba(255, 255, 255, 0.25) inset;
}

button:hover:not(:disabled)::before {
  width: 300px;
  height: 300px;
}

button:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(11, 99, 206, 0.2);
  transition: all 0.1s;
}

button:disabled {
  background: #a9c2e5;
  cursor: not-allowed;
  transform: translateY(0);
  box-shadow: none;
  opacity: 0.7;
}

button:disabled::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

#result {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  margin-top: 24px;
  padding: 20px 24px;
  border: 2px solid #e1e8ed;
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  white-space: pre-wrap;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: #2c3e50;
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
  animation: fadeIn 0.4s ease;
  position: relative;
  overflow: hidden;
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* Decorative corner accent */
#result::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, rgba(11, 99, 206, 0.05) 0%, transparent 70%);
  border-radius: 0 8px 0 50px;
  pointer-events: none;
}

#result:empty {
  display: none;
}

#result.success {
  animation: successPulse 0.6s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes successPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

#loader {
  display: none;
  margin: 12px 0;
  font-size: 14px;
  color: #5a6c7d;
  text-align: center;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ============================================
   MODERN PROGRESS BAR (Japanese-friendly)
   ============================================ */
.progress-container {
  width: 100%;
  margin-top: var(--spacing-4xl);
  padding: var(--spacing-4xl);
  background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.progress-label {
  font-family: var(--font-family-body);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--letter-spacing-normal);
}

.progress-percentage {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-tight);
  min-width: 60px;
  text-align: right;
  transition: color var(--transition-base);
}

.progress-bar-wrapper {
  width: 100%;
  margin-bottom: var(--spacing-md);
}

.progress-bar-track {
  width: 100%;
  height: 16px;
  background: linear-gradient(135deg, #e9ecef 0%, #e1e8ed 100%);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, 
    var(--color-primary) 0%, 
    var(--color-primary-dark) 50%,
    var(--color-primary-darker) 100%
  );
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 
    0 2px 8px rgba(11, 99, 206, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: progressPulse 2s ease-in-out infinite;
}

.progress-bar-fill::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: progressShine 2s ease-in-out infinite;
}

.progress-bar-shine {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.4) 50%,
    transparent 100%
  );
  animation: progressShineMove 2s ease-in-out infinite;
}

.progress-status {
  font-family: var(--font-family-body);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--spacing-sm);
  letter-spacing: var(--letter-spacing-normal);
  min-height: 20px;
}

/* Progress bar animations */
@keyframes progressPulse {
  0%, 100% {
    box-shadow: 
      0 2px 8px rgba(11, 99, 206, 0.3),
      inset 0 1px 0 rgba(255, 255, 255, 0.2);
  }
  50% {
    box-shadow: 
      0 2px 12px rgba(11, 99, 206, 0.4),
      inset 0 1px 0 rgba(255, 255, 255, 0.3);
  }
}

@keyframes progressShine {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@keyframes progressShineMove {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Progress bar states */
.progress-container[aria-valuenow="100"] .progress-bar-fill {
  background: linear-gradient(90deg, 
    var(--color-success) 0%, 
    #229954 50%,
    #1e8449 100%
  );
  box-shadow: 
    0 2px 8px rgba(39, 174, 96, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: progressComplete 0.5s ease-out;
}

.progress-container[aria-valuenow="100"] .progress-percentage {
  color: var(--color-success);
}

.progress-container[aria-valuenow="100"] .progress-status {
  color: var(--color-success);
  font-weight: var(--font-weight-semibold);
}

@keyframes progressComplete {
  0% {
    transform: scaleX(1);
  }
  50% {
    transform: scaleX(1.02);
  }
  100% {
    transform: scaleX(1);
  }
}

/* Responsive design for progress bar */
@media (max-width: 768px) {
  .progress-container {
    padding: var(--spacing-2xl);
  }
  
  .progress-label {
    font-size: var(--font-size-base);
  }
  
  .progress-percentage {
    font-size: var(--font-size-xl);
  }
  
  .progress-bar-track {
    height: 12px;
  }
}

footer {
  font-family: "M PLUS Rounded 1c", "Kosugi Maru", sans-serif;
  margin-top: 48px;
  padding-top: 28px;
  font-size: 13px;
  color: #7f8c8d;
  text-align: center;
  border-top: 2px solid #e1e8ed;
  font-weight: 500;
  letter-spacing: 0.8px;
  position: relative;
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
  margin-left: -36px;
  margin-right: -36px;
  margin-bottom: -32px;
  padding-left: 36px;
  padding-right: 36px;
  padding-bottom: 24px;
  border-radius: 0 0 12px 12px;
}

/* Decorative top border pattern */
footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, 
    transparent 0%,
    rgba(11, 99, 206, 0.2) 20%,
    rgba(11, 99, 206, 0.4) 50%,
    rgba(11, 99, 206, 0.2) 80%,
    transparent 100%
  );
  border-radius: 0 0 3px 3px;
}

/* Decorative corner elements */
footer::after {
  content: '◇';
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: rgba(11, 99, 206, 0.2);
  letter-spacing: 8px;
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 20px 12px;
    font-size: 14px;
  }

  .container {
    padding: 24px 20px;
    border-radius: 8px;
  }

  h2 {
    font-size: 20px;
    padding: 14px 16px;
    margin-bottom: 24px;
  }

  .form-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  label {
    min-width: auto;
    width: 100%;
    margin-bottom: 4px;
    padding-top: 0;
  }

  .file-upload-area {
    width: 100%;
  }

  .select-wrapper {
    width: 100%;
  }

  select {
    width: 100%;
  }

  button {
    width: 100%;
    padding: 12px 24px;
  }
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

/* Selection color */
::selection {
  background: rgba(11, 99, 206, 0.2);
  color: #1a5490;
}

/* Decorative divider lines */
.form-row:not(:last-of-type)::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%,
    rgba(11, 99, 206, 0.1) 20%,
    rgba(11, 99, 206, 0.1) 80%,
    transparent 100%
  );
}

/* Japanese-inspired wave pattern for header */
h2 {
  background-image: 
    linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(11, 99, 206, 0.02) 2px,
      rgba(11, 99, 206, 0.02) 4px
    );
}

/* Heavy decorative border for container */
.container {
  background-image: 
    linear-gradient(135deg, #ffffff 0%, #fafbfc 100%),
    radial-gradient(circle at top right, rgba(11, 99, 206, 0.03) 0%, transparent 50%);
}

/* Decorative pattern for file drop zone */
.file-drop-zone.has-file {
  background-image: 
    linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 8px,
      rgba(39, 174, 96, 0.03) 8px,
      rgba(39, 174, 96, 0.03) 16px
    );
}

/* Heavy decoration for button */
button {
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

button::before {
  background: rgba(255, 255, 255, 0.25);
}

/* Decorative elements for result box */
#result.success::after {
  content: '✓';
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 20px;
  color: #27ae60;
  font-weight: bold;
  animation: checkmark 0.5s ease;
}

@keyframes checkmark {
  0% {
    transform: scale(0) rotate(0deg);
    opacity: 0;
  }
  50% {
    transform: scale(1.2) rotate(180deg);
  }
  100% {
    transform: scale(1) rotate(360deg);
    opacity: 1;
  }
}

/* ============================================
   TOAST NOTIFICATION SYSTEM
   ============================================ */
.toast-container {
  position: fixed;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: 400px;
  pointer-events: none;
}

.toast {
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  min-width: 300px;
  max-width: 100%;
  pointer-events: auto;
  animation: toastSlideIn 0.3s var(--transition-bounce);
  border-left: 4px solid;
  position: relative;
  overflow: hidden;
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: currentColor;
  transform-origin: left;
  animation: toastProgress var(--toast-duration, 5s) linear forwards;
}

.toast.success {
  border-left-color: var(--color-success);
  color: var(--color-success);
}

.toast.error {
  border-left-color: var(--color-error);
  color: var(--color-error);
}

.toast.warning {
  border-left-color: var(--color-warning);
  color: var(--color-warning);
}

.toast.info {
  border-left-color: var(--color-info);
  color: var(--color-info);
}

.toast-icon {
  font-size: var(--font-size-xl);
  flex-shrink: 0;
  margin-top: 2px;
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

.toast-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

.toast-close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  margin: calc(var(--spacing-xs) * -1);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  flex-shrink: 0;
  font-size: var(--font-size-lg);
  line-height: 1;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-close:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.toast-close:focus {
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 2px;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastProgress {
  from {
    transform: scaleX(1);
  }
  to {
    transform: scaleX(0);
  }
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */

/* Skip to main content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: var(--spacing-lg);
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  text-decoration: none;
  z-index: var(--z-tooltip);
  font-weight: var(--font-weight-bold);
}

.skip-link:focus {
  top: var(--spacing-lg);
  outline: 3px solid var(--focus-ring-color);
  outline-offset: 2px;
}

/* Enhanced focus styles */
*:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-sm);
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Remove default focus for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Error states */
.form-row.error label {
  color: var(--color-error);
}

.form-row.error .error-message {
  display: block;
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  padding-left: var(--spacing-2xl);
  animation: errorShake 0.3s ease;
}

.form-row.error input,
.form-row.error select {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.form-row.error input:focus,
.form-row.error select:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2);
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 0%,
    rgba(255, 255, 255, 0.5) 50%,
    var(--color-bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: skeletonLoading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeletonLoading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--spacing-7xl) var(--spacing-xl);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.empty-state-message {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

/* Responsive toast */
@media (max-width: 768px) {
  .toast-container {
    top: var(--spacing-md);
    right: var(--spacing-md);
    left: var(--spacing-md);
    max-width: none;
  }

  .toast {
    min-width: auto;
    width: 100%;
  }
}