/**
 * towanone Simple Apps - Common Styles
 * Based on DESIGN_GUIDE.md
 */

:root {
  /* Base Colors */
  --towa-bg: #FFFFFF;
  --towa-bg-alt: #F5F7F8;
  --towa-bg-subtle: #EDF1F3;
  --towa-text: #2D3748;
  --towa-text-light: #5A6A7A;
  --towa-heading: #1A2332;
  --towa-border: #DDE3E8;

  /* Accent Colors */
  --towa-primary: #2A7B7B;
  --towa-primary-light: #3D9494;
  --towa-primary-dark: #1F5F5F;
  --towa-secondary: #7A6B4E;
  --towa-secondary-light: #9A8B6E;

  /* Functional Colors */
  --towa-success: #2F855A;
  --towa-warning: #B7791F;
  --towa-danger: #C53030;
}

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

/* Base */
body {
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--towa-text);
  background: var(--towa-bg);
  min-height: 100vh;
}

/* Container */
.app-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px;
}

.app-container--wide {
  max-width: 800px;
}

/* Header */
.app-header {
  text-align: center;
  margin-bottom: 24px;
}

.app-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--towa-heading);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.app-title--music {
  color: var(--towa-secondary);
}

.app-description {
  font-size: 0.875rem;
  color: var(--towa-text-light);
}

/* Security Badge */
.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  padding: 6px 14px;
  font-size: 0.75rem;
  color: var(--towa-text-light);
  background: var(--towa-bg-alt);
  border: 1px solid var(--towa-border);
  border-radius: 100px;
}

.app-badge--music {
  background: #FAF8F5;
  color: var(--towa-secondary);
  border-color: rgba(122, 107, 78, 0.2);
}

/* Card */
.app-card {
  background: var(--towa-bg);
  border: 1px solid var(--towa-border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
}

.app-card__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--towa-heading);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--towa-border);
}

/* Form Elements */
.app-input,
.app-textarea,
.app-select {
  width: 100%;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--towa-text);
  background: var(--towa-bg);
  border: 1px solid var(--towa-border);
  border-radius: 6px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.app-input:focus,
.app-textarea:focus,
.app-select:focus {
  outline: none;
  border-color: var(--towa-primary);
  box-shadow: 0 0 0 3px rgba(42, 123, 123, 0.1);
}

.app-input--music:focus,
.app-textarea--music:focus,
.app-select--music:focus {
  border-color: var(--towa-secondary);
  box-shadow: 0 0 0 3px rgba(122, 107, 78, 0.1);
}

.app-textarea {
  min-height: 120px;
  resize: vertical;
  font-family: inherit;
  line-height: 1.6;
}

.app-textarea--code {
  font-family: "SF Mono", "Monaco", "Menlo", monospace;
  font-size: 0.875rem;
}

.app-input::placeholder,
.app-textarea::placeholder {
  color: var(--towa-text-light);
}

/* Buttons */
.app-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--towa-text);
  background: var(--towa-bg);
  border: 1px solid var(--towa-border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.app-btn:hover {
  border-color: var(--towa-primary);
  color: var(--towa-primary);
}

.app-btn:active {
  transform: translateY(1px);
}

.app-btn--primary {
  color: #FFFFFF;
  background: var(--towa-primary);
  border-color: var(--towa-primary);
}

.app-btn--primary:hover {
  background: var(--towa-primary-light);
  border-color: var(--towa-primary-light);
  color: #FFFFFF;
}

.app-btn--music {
  color: #FFFFFF;
  background: var(--towa-secondary);
  border-color: var(--towa-secondary);
}

.app-btn--music:hover {
  background: var(--towa-secondary-light);
  border-color: var(--towa-secondary-light);
  color: #FFFFFF;
}

.app-btn--danger {
  color: var(--towa-danger);
  border-color: var(--towa-danger);
}

.app-btn--danger:hover {
  background: #FFF5F5;
}

.app-btn--block {
  width: 100%;
}

/* Button Groups */
.app-btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.app-btn-group--center {
  justify-content: center;
}

/* Toolbar */
.app-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px;
  background: var(--towa-bg-alt);
  border-radius: 6px;
  margin-bottom: 12px;
}

.app-toolbar__spacer {
  flex: 1;
}

.app-toolbar__group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-toolbar__label {
  font-size: 0.8125rem;
  color: var(--towa-text-light);
}

/* Stats */
.app-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.app-stat {
  text-align: center;
  padding: 12px 8px;
  background: var(--towa-bg-alt);
  border-radius: 6px;
}

.app-stat__value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--towa-primary);
  line-height: 1.2;
}

.app-stat__value--music {
  color: var(--towa-secondary);
}

.app-stat__label {
  font-size: 0.75rem;
  color: var(--towa-text-light);
  margin-top: 2px;
}

/* Result Display */
.app-result {
  padding: 16px;
  background: var(--towa-bg-alt);
  border-radius: 6px;
  font-family: "SF Mono", "Monaco", "Menlo", monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Grid Layout */
.app-grid {
  display: grid;
  gap: 12px;
}

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

.app-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.app-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Note Buttons (Music) */
.app-note-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 8px;
  font-family: inherit;
  background: var(--towa-bg);
  border: 1px solid var(--towa-border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.app-note-btn:hover {
  border-color: var(--towa-secondary);
  background: #FAF8F5;
}

.app-note-btn:active,
.app-note-btn.is-playing {
  background: var(--towa-secondary);
  border-color: var(--towa-secondary);
  color: #FFFFFF;
}

.app-note-btn__name {
  font-size: 1rem;
  font-weight: 600;
}

.app-note-btn__hz {
  font-size: 0.6875rem;
  color: var(--towa-text-light);
}

.app-note-btn:active .app-note-btn__hz,
.app-note-btn.is-playing .app-note-btn__hz {
  color: rgba(255, 255, 255, 0.8);
}

/* Meter */
.app-meter {
  position: relative;
  height: 48px;
  background: var(--towa-bg-alt);
  border-radius: 6px;
  overflow: hidden;
  margin: 16px 0;
}

.app-meter__bar {
  position: absolute;
  bottom: 8px;
  left: 50%;
  width: 3px;
  height: 32px;
  background: var(--towa-secondary);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: left 0.1s;
}

.app-meter__center {
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 1px;
  height: 40px;
  background: var(--towa-success);
  transform: translateX(-50%);
}

/* Footer */
.app-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--towa-border);
  font-size: 0.75rem;
  color: var(--towa-text-light);
}

.app-footer a {
  color: var(--towa-primary);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

/* Error Message */
.app-error {
  padding: 12px;
  background: #FFF5F5;
  border: 1px solid #FED7D7;
  border-radius: 6px;
  color: var(--towa-danger);
  font-size: 0.875rem;
  margin-bottom: 12px;
}

/* Notice */
.app-notice {
  padding: 12px;
  background: var(--towa-bg-alt);
  border-radius: 6px;
  font-size: 0.8125rem;
  color: var(--towa-text-light);
}

/* Responsive */
@media (max-width: 480px) {
  .app-container {
    padding: 16px 12px;
  }

  .app-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .app-toolbar__spacer {
    display: none;
  }

  .app-btn-group {
    flex-direction: column;
  }

  .app-grid--4 {
    grid-template-columns: repeat(3, 1fr);
  }
}