/* ============================================
   Daily Water Intake Calculator - CSS
   Neobrutalism Design System
   Font sizes increased by 2px
   ============================================ */

/* Global box-sizing */
.daily-water-intake-calculator-container,
.daily-water-intake-calculator-container *,
.daily-water-intake-calculator-container *::before,
.daily-water-intake-calculator-container *::after {
  box-sizing: border-box;
}

/* ============================================
   CSS Variables - Light Mode (Default)
   ============================================ */
.daily-water-intake-calculator-container {
  /* Background colors */
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --bg-section: #fff;
  
  /* Borders */
  --border-color: #333;
  
  /* Text colors */
  --text-primary: #222;
  --text-secondary: #555;
  --text-light: #666;
  
  /* Brand colors */
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-purple: #9b59b6;
  --color-teal: #1abc9c;
  --color-water: #00b4d8;
  --color-water-light: #90e0ef;
  --color-water-dark: #0077b6;
  
  /* 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;
  --radius-section: 6px;
  --radius-button: 4px;
  --radius-input: 4px;
  
  /* Input focus */
  --input-focus-bg: #fffacd;
  
  /* Header title */
  --title-color: #0077b6;
  --title-shadow: 2px 2px 0 rgba(255,255,255,0.5);
  
  /* 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 - Manual Dark Mode
   ============================================ */
.daily-water-intake-calculator-container.dark {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-section: #2d2d2d;
  --border-color: #e0e0e0;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-light: #909090;
  --color-accent: #5dade2;
  --color-success: #52c77a;
  --color-warning: #f5b041;
  --color-danger: #ec7063;
  --color-purple: #af7ac5;
  --color-teal: #48d1cc;
  --color-water: #48cae4;
  --color-water-light: #90e0ef;
  --color-water-dark: #00b4d8;
  --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-bg: #3a3a3a;
  --title-color: #48cae4;
  --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
  --btn-hover-overlay: rgba(255,255,255,0.1);
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
}

/* ============================================
   CSS Variables - System Dark Mode Auto Detection
   ============================================ */
@media (prefers-color-scheme: dark) {
  .daily-water-intake-calculator-container:not(.dark):not(.light) {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-section: #2d2d2d;
    --border-color: #e0e0e0;
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-light: #909090;
    --color-accent: #5dade2;
    --color-success: #52c77a;
    --color-warning: #f5b041;
    --color-danger: #ec7063;
    --color-purple: #af7ac5;
    --color-teal: #48d1cc;
    --color-water: #48cae4;
    --color-water-light: #90e0ef;
    --color-water-dark: #00b4d8;
    --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-bg: #3a3a3a;
    --title-color: #48cae4;
    --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
    --btn-hover-overlay: rgba(255,255,255,0.1);
    --copy-btn-bg: #3a3a3a;
    --copy-btn-hover-bg: #4a4a4a;
  }
}

/* ============================================
   Main Container
   ============================================ */
.daily-water-intake-calculator-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: 8px;
  right: 8px;
  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 Section
   ============================================ */
.calculator-header {
  text-align: center;
  margin-bottom: 8px;
  padding: 8px;
}

.calculator-header .main-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--title-color);
  margin: 0 0 6px 0;
  text-shadow: var(--title-shadow);
}

.calculator-header .subtitle {
  font-size: 15.5px;
  color: var(--text-secondary);
  margin: 0;
}

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

/* ============================================
   Sections (Input & Result)
   ============================================ */
.input-section,
.result-section {
  background: var(--bg-section);
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-md);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.section-header svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-water);
}

/* ============================================
   Copy Button in Header
   ============================================ */
.copy-btn {
  margin-left: auto;
  padding: 4px 10px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 4px;
}

.copy-btn:hover {
  background: var(--copy-btn-hover-bg);
  transform: scale(1.02);
}

.copy-btn:active {
  transform: scale(0.98);
}

.copy-btn svg {
  stroke: var(--text-secondary);
}

/* ============================================
   Input Fields
   ============================================ */
.input-group {
  margin-bottom: 10px;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Input row for weight + slider */
.input-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  flex: 0 0 120px;
}

.input-wrapper input {
  width: 100%;
  padding: 8px 40px 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 18px;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.input-wrapper input:focus {
  outline: none;
  border-color: var(--color-water);
  background: var(--input-focus-bg);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15);
}

.input-unit {
  position: absolute;
  right: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
}

/* Weight Slider */
.weight-slider {
  flex: 1;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, var(--color-water-light), var(--color-water), var(--color-water-dark));
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.weight-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--color-water);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.15s;
}

.weight-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.weight-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--color-water);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* ============================================
   Activity & Climate Buttons
   ============================================ */
.activity-buttons,
.climate-buttons {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.activity-btn,
.climate-btn {
  flex: 1;
  min-width: 60px;
  padding: 8px 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.activity-btn:hover,
.climate-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.activity-btn.active,
.climate-btn.active {
  background: linear-gradient(135deg, var(--color-water-light), var(--color-water));
  border-color: var(--color-water-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* ============================================
   Extra Factors - Checkboxes
   ============================================ */
.extra-factors {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-primary);
  padding: 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  transition: all 0.2s;
}

.checkbox-label:hover {
  background: var(--bg-primary);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkbox-label .checkmark {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-radius: 3px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background: var(--color-water);
  border-color: var(--color-water-dark);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: '✓';
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

/* ============================================
   Calculate Button
   ============================================ */
.calculate-btn {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  background: linear-gradient(135deg, var(--color-water) 0%, var(--color-water-dark) 100%);
  color: #fff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.calculate-btn:hover {
  filter: brightness(1.08);
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
}

.calculate-btn:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.calculate-btn svg {
  stroke: #fff;
  fill: rgba(255,255,255,0.3);
}

/* ============================================
   Secondary Buttons
   ============================================ */
.button-group {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.sample-btn,
.reset-btn {
  flex: 1;
  padding: 6px 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.sample-btn {
  background: var(--color-success);
  color: #fff;
}

.reset-btn {
  background: var(--color-warning);
  color: #fff;
}

.sample-btn:hover,
.reset-btn:hover {
  filter: brightness(1.05);
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2);
}

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

.sample-btn svg,
.reset-btn svg {
  stroke: #fff;
}

/* ============================================
   Result Placeholder
   ============================================ */
.result-content {
  min-height: 280px;
  display: flex;
  flex-direction: column;
}

.result-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  text-align: center;
  padding: 20px;
}

.placeholder-icon {
  font-size: 50px;
  margin-bottom: 12px;
  opacity: 0.6;
}

.result-placeholder p {
  font-size: 16px;
  margin: 0;
  line-height: 1.6;
}

/* ============================================
   Result Display
   ============================================ */
.result-main {
  background: linear-gradient(135deg, var(--color-water) 0%, var(--color-water-dark) 100%);
  padding: 16px 12px;
  border-radius: var(--radius-section);
  text-align: center;
  margin-bottom: 8px;
  border: 1px solid var(--border-color);
}

.result-main-label {
  font-size: 15px;
  color: rgba(255,255,255,0.9);
  margin-bottom: 4px;
}

.result-main-value {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  font-family: 'Courier New', monospace;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}

.result-main-unit {
  font-size: 20px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
}

/* Hydration Status Badge */
.hydration-status {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.hydration-status.low {
  background: rgba(231, 76, 60, 0.8);
}

.hydration-status.normal {
  background: rgba(39, 174, 96, 0.8);
}

.hydration-status.high {
  background: rgba(52, 152, 219, 0.8);
}

/* Result Details Grid */
.result-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.result-detail-card {
  background: var(--bg-secondary);
  padding: 10px 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s;
}

.result-detail-card:hover {
  transform: translateY(-2px);
}

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

.result-detail-label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 2px;
}

.result-detail-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-water);
  font-family: 'Courier New', monospace;
}

/* ============================================
   Water Bottle Visualization
   ============================================ */
.water-bottle-visual {
  margin-top: 8px;
  padding: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-sm);
}

.bottle-visual-title {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 8px;
}

.bottle-row {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.mini-bottle {
  width: 26px;
  height: 46px;
  background: var(--bg-primary);
  border: 1.5px solid var(--border-color);
  border-radius: 0 0 8px 8px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s;
}

.mini-bottle:hover {
  transform: scale(1.1);
}

.mini-bottle::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 5px;
  background: var(--border-color);
  border-radius: 2px 2px 0 0;
}

.mini-bottle-water {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, var(--color-water-dark), var(--color-water));
  transition: height 0.3s ease;
}

.mini-bottle.filled .mini-bottle-water {
  height: 100%;
}

.mini-bottle.half .mini-bottle-water {
  height: 50%;
}

.bottle-count {
  text-align: center;
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 600;
}

.bottle-count strong {
  color: var(--color-water);
  font-size: 16px;
}

/* ============================================
   Progress Bar
   ============================================ */
.hydration-progress {
  margin-top: 8px;
  padding: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.progress-title {
  font-size: 13px;
  color: var(--text-secondary);
}

.progress-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-water);
}

.progress-bar {
  height: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-water-light), var(--color-water), var(--color-water-dark));
  border-radius: 5px;
  transition: width 0.8s ease;
}

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

.info-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s;
}

.info-card:hover {
  transform: translateY(-2px);
}

.info-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.info-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.info-text strong {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.info-text span {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================
   Toast Notification
   ============================================ */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  padding: 10px 14px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: 1000;
  max-width: 280px;
  pointer-events: none;
}

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

.toast-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-success), #1e8449);
  border-radius: 50%;
  flex-shrink: 0;
}

.toast-icon svg {
  stroke: #fff;
}

.toast-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toast-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.toast-value {
  font-size: 13px;
  color: var(--text-secondary);
  font-family: 'Courier New', monospace;
}

/* ============================================
   Responsive - Tablet (768px or less)
   ============================================ */
@media (max-width: 768px) {
  .daily-water-intake-calculator-container {
    margin: 6px 5px;
    padding: 7px;
    width: calc(100% - 10px);
  }

  .main-grid {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .calculator-header .main-title {
    font-size: 26px;
  }

  .section-header {
    font-size: 17px;
  }

  .dark-mode-toggle {
    font-size: 16px;
    padding: 5px 8px;
    top: 7px;
    right: 7px;
  }

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

  .result-main-value {
    font-size: 34px;
  }

  .activity-btn,
  .climate-btn {
    min-width: 50px;
    padding: 6px 4px;
    font-size: 13px;
  }

  .input-row {
    flex-direction: column;
    gap: 8px;
  }

  .input-wrapper {
    flex: 1;
    width: 100%;
  }

  .weight-slider {
    width: 100%;
  }

  .extra-factors {
    flex-direction: column;
    gap: 6px;
  }
}

/* ============================================
   Responsive - Mobile (480px or less)
   ============================================ */
@media (max-width: 480px) {
  .daily-water-intake-calculator-container {
    padding: 6px;
    border-width: 1px;
  }

  .input-section,
  .result-section,
  .info-section {
    padding: 6px;
  }

  .calculator-header .main-title {
    font-size: 22px;
  }

  .calculator-header .subtitle {
    font-size: 14px;
  }

  .info-cards {
    grid-template-columns: 1fr 1fr;
  }

  .info-card {
    flex-direction: column;
    text-align: center;
    gap: 4px;
    padding: 6px 4px;
  }

  .result-details {
    grid-template-columns: 1fr 1fr;
  }

  .result-main-value {
    font-size: 30px;
  }

  .mini-bottle {
    width: 22px;
    height: 38px;
  }

  .sample-btn,
  .reset-btn {
    font-size: 14px;
    padding: 5px 8px;
  }

  .input-wrapper input {
    font-size: 16px;
    padding: 7px 35px 7px 8px;
  }

  .checkbox-label {
    font-size: 13px;
    padding: 5px 8px;
  }
}