/* ===================================
   Volume Converter - WordPress Integration
   2-column layout with neobrutalism design
   =================================== */

/* Global box-sizing */
.volume-converter-container,
.volume-converter-container *,
.volume-converter-container *::before,
.volume-converter-container *::after {
  box-sizing: border-box;
}

/* ===================================
   CSS Variables - Light Mode (Default)
   =================================== */
.volume-converter-container {
  /* Background colors */
  --bg-primary: #f5f5f0;      /* Cream main background */
  --bg-secondary: #fff;        /* White section background */
  --bg-section: #fff;
  
  /* Borders */
  --border-color: #333;        /* Dark black border */
  
  /* Text colors */
  --text-primary: #222;        /* Dark black */
  --text-secondary: #555;      /* Medium gray */
  --text-light: #666;          /* Light gray */
  
  /* Brand colors */
  --color-accent: #3498db;     /* Blue (emphasis/main button) */
  --color-success: #27ae60;    /* Green (success/complete) */
  --color-warning: #f39c12;    /* Orange (warning/reset) */
  --color-danger: #e74c3c;     /* Red (danger/error) */
  --color-purple: #9b59b6;     /* Purple (auxiliary) */
  --color-teal: #1abc9c;       /* Teal (info) */
  
  /* Shadows (neobrutalism) */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.1);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.15);
  
  /* Border radius */
  --radius-container: 8px;     /* Main container */
  --radius-section: 6px;       /* Sections and cards */
  --radius-button: 4px;        /* Buttons */
  --radius-input: 4px;         /* Input fields */
  
  /* Input focus */
  --input-focus-bg: #fffacd;   /* Light yellow highlight */
  
  /* Header title */
  --title-color: #2c3e50;      /* Dark blue-gray */
  --title-shadow: 2px 2px 0 rgba(255,255,255,0.5);  /* Light shadow */
  
  /* Button hover background */
  --btn-hover-overlay: rgba(0,0,0,0.1);
  
  /* Copy button background */
  --copy-btn-bg: #fff;
  --copy-btn-hover-bg: #f0f0f0;
}

/* ===================================
   CSS Variables - Dark Mode (Manual)
   =================================== */
.volume-converter-container.dark {
  /* Background colors - dark gray tones */
  --bg-primary: #1a1a1a;       /* Dark gray main background */
  --bg-secondary: #2d2d2d;     /* Medium dark gray section background */
  --bg-section: #2d2d2d;
  
  /* Borders - light gray for contrast */
  --border-color: #e0e0e0;     /* Light gray border */
  
  /* Text colors - light colors for readability */
  --text-primary: #e8e8e8;     /* Light gray (almost white) */
  --text-secondary: #b0b0b0;   /* Medium light gray */
  --text-light: #909090;       /* Slightly darker light gray */
  
  /* Brand colors - adjusted brighter for dark background */
  --color-accent: #5dade2;     /* Brighter blue */
  --color-success: #52c77a;    /* Brighter green */
  --color-warning: #f5b041;    /* Brighter orange */
  --color-danger: #ec7063;     /* Brighter red */
  --color-purple: #af7ac5;     /* Brighter purple */
  --color-teal: #48d1cc;       /* Brighter teal */
  
  /* Shadows - light color (neobrutalism) */
  --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
  --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
  --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
  
  /* Input focus - slightly bright dark gray */
  --input-focus-bg: #3a3a3a;   /* Slightly bright on dark background */
  
  /* Header title - bright blue tones */
  --title-color: #7fb3d5;      /* Bright blue */
  --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);  /* Dark shadow */
  
  /* Button hover background */
  --btn-hover-overlay: rgba(255,255,255,0.1);
  
  /* Copy button background */
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
}

/* ===================================
   System Dark Mode Auto Detection
   =================================== */
@media (prefers-color-scheme: dark) {
  .volume-converter-container:not(.dark):not(.light) {
    /* Background colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-section: #2d2d2d;
    
    /* Borders */
    --border-color: #e0e0e0;
    
    /* Text colors */
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-light: #909090;
    
    /* Brand colors */
    --color-accent: #5dade2;
    --color-success: #52c77a;
    --color-warning: #f5b041;
    --color-danger: #ec7063;
    --color-purple: #af7ac5;
    --color-teal: #48d1cc;
    
    /* Shadows */
    --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
    --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
    --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
    
    /* Input focus */
    --input-focus-bg: #3a3a3a;
    
    /* Header title */
    --title-color: #7fb3d5;
    --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
    
    /* Button hover background */
    --btn-hover-overlay: rgba(255,255,255,0.1);
    
    /* Copy button background */
    --copy-btn-bg: #3a3a3a;
    --copy-btn-hover-bg: #4a4a4a;
  }
}

/* ===================================
   Main Container
   =================================== */
.volume-converter-container {
  position: relative;
  max-width: 900px;
  width: 100%;
  margin: 8px auto;
  padding: 8px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-container);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  line-height: 1.5;
}

/* ===================================
   Dark Mode Toggle Button
   =================================== */
.dark-mode-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
  font-size: 17.5px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 10;
}

.dark-mode-toggle:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

.dark-mode-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* ===================================
   Header
   =================================== */
.converter-header {
  text-align: center;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
}

.converter-header h2 {
  margin: 0 0 4px 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--title-color);
  text-shadow: var(--title-shadow);
}

.subtitle {
  margin: 0;
  font-size: 16px;
  color: var(--text-secondary);
}

/* ===================================
   Main Grid Layout - 2 Columns
   =================================== */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

.left-column,
.right-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ===================================
   Input Section (Left Column)
   =================================== */
.input-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  padding: 8px;
  box-shadow: var(--shadow-md);
}

.section-title {
  margin: 0 0 8px 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.section-title .icon {
  stroke: var(--color-accent);
}

.input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.input-field-wrapper {
  flex: 1;
  position: relative;
}

.main-input {
  width: 100%;
  padding: 10px 40px 10px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-section);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: 'Consolas', 'Monaco', monospace;
}

.main-input:focus {
  outline: none;
  background: var(--input-focus-bg);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-clear-main {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-light);
  padding: 6px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-clear-main:hover {
  color: var(--color-danger);
  background: rgba(231, 76, 60, 0.1);
  border-radius: 50%;
}

.unit-select {
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-section);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  min-width: 200px;
}

.unit-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Input error message */
.input-error {
  padding: 8px;
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-input);
  color: var(--color-danger);
  font-size: 14px;
  margin-bottom: 8px;
}

/* Input controls */
.input-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quick-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.quick-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.quick-buttons {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.btn-quick {
  padding: 6px 12px;
  background: var(--color-success);
  color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.btn-quick:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

.btn-quick:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.display-options {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

.option-label input[type="checkbox"] {
  cursor: pointer;
}

.decimal-input {
  width: 60px;
  padding: 4px 6px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-section);
  color: var(--text-primary);
  font-size: 14px;
  text-align: center;
}

/* ===================================
   Preset Section (Left Column)
   =================================== */
.preset-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  padding: 8px;
  box-shadow: var(--shadow-md);
}

.preset-header {
  margin-bottom: 8px;
}

.preset-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 6px;
}

.btn-preset {
  padding: 8px 6px;
  background: var(--bg-section);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.btn-preset:hover {
  background: var(--color-accent);
  color: #fff;
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

.btn-preset:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.preset-icon {
  font-size: 22px;
  margin-bottom: 4px;
}

.preset-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.preset-value {
  font-size: 11px;
  color: var(--text-secondary);
}

/* ===================================
   Result Section (Right Column)
   =================================== */
.result-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.conversion-info-box,
.main-results-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  padding: 8px;
  box-shadow: var(--shadow-md);
}

.info-content {
  font-size: 16px;
  color: var(--text-primary);
  line-height: 1.6;
}

.placeholder-text {
  color: var(--text-light);
  font-style: italic;
  margin: 8px 0;
}

.result-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.result-card {
  background: var(--bg-section);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  padding: 8px;
  box-shadow: var(--shadow-sm);
}

.result-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.result-card-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.result-card-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: 'Consolas', 'Monaco', monospace;
}

.result-card-copy {
  padding: 4px 8px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
}

.result-card-copy:hover {
  background: var(--copy-btn-hover-bg);
}

/* ===================================
   Full Width Sections
   =================================== */
.full-width-sections {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.all-results-section,
.chart-section,
.real-life-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  padding: 8px;
  box-shadow: var(--shadow-md);
}

.two-column-tables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.results-table-wrapper {
  overflow-x: auto;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
}

.results-table th,
.results-table td {
  padding: 8px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
}

.results-table th {
  background: var(--bg-section);
  font-weight: 700;
  color: var(--text-primary);
}

.results-table td {
  color: var(--text-primary);
}

.results-table .unit-name {
  font-weight: 600;
}

.results-table .unit-category {
  color: var(--text-secondary);
  font-size: 12px;
}

.results-table .unit-value {
  font-family: 'Consolas', 'Monaco', monospace;
  font-weight: 600;
}

.results-table .btn-copy {
  padding: 4px 8px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
}

.results-table .btn-copy:hover {
  background: var(--copy-btn-hover-bg);
}

/* Chart section */
.chart-info {
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.comparison-cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}

.comparison-card {
  background: var(--bg-section);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  padding: 12px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.comparison-card-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.comparison-card-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: 'Consolas', 'Monaco', monospace;
}

/* Real life section */
.real-life-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}

.real-life-card {
  background: var(--bg-section);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  padding: 12px;
  box-shadow: var(--shadow-sm);
}

.real-life-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.real-life-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.real-life-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===================================
   Units Info Section (Collapsible)
   =================================== */
.units-info-section {
  margin-top: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.collapsible-header {
  width: 100%;
  padding: 12px;
  background: var(--bg-section);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  transition: all 0.2s;
}

.collapsible-header:hover {
  background: var(--btn-hover-overlay);
}

.arrow-icon {
  transition: transform 0.3s;
  stroke: var(--text-secondary);
}

.collapsible-header.active .arrow-icon {
  transform: rotate(180deg);
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.collapsible-content.active {
  max-height: 2000px;
}

.units-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 8px;
  padding: 12px;
}

.unit-info-card {
  background: var(--bg-section);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  padding: 12px;
  box-shadow: var(--shadow-sm);
}

.unit-info-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.unit-info-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  line-height: 1.5;
}

.unit-info-region {
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 600;
  margin-top: 6px;
}

/* ===================================
   Footer Note
   =================================== */
.footer-note {
  margin-top: 8px;
  padding: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
}

.keyboard-hint {
  margin-top: 4px;
  font-size: 11px;
}

/* ===================================
   Toast Notification
   =================================== */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 16px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-button);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
  /* Convert to 1-column layout */
  .main-grid {
    grid-template-columns: 1fr;
  }
  
  .two-column-tables {
    grid-template-columns: 1fr;
  }
  
  .preset-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .units-info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .volume-converter-container {
    padding: 6px;
    margin: 6px auto;
    border-width: 1px;
  }
  
  .converter-header h2 {
    font-size: 24px;
  }
  
  .subtitle {
    font-size: 14px;
  }
  
  .main-input {
    font-size: 20px;
    padding: 8px 36px 8px 8px;
  }
  
  .unit-select {
    min-width: 150px;
    font-size: 14px;
  }
  
  .preset-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .input-row {
    flex-direction: column;
  }
  
  .result-card-value {
    font-size: 18px;
  }
}

/* ===================================
   Animation Keyframes
   =================================== */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

.shake {
  animation: shake 0.5s;
}