/* Vitamin Calculator - WordPress Compatible CSS */
/* All comments in English, UI text in Korean */

/* ================================
   CSS Variables - Design System
   ================================ */
.vitamin-calculator-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-info: #3498db;       /* Info blue */
  
  /* 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;
}

/* Dark mode - Manual toggle */
.vitamin-calculator-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-info: #5dade2;       /* Brighter info blue */
  
  /* 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) {
  .vitamin-calculator-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-info: #5dade2;
    
    /* 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;
  }
}

/* ================================
   Global Styles
   ================================ */

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

/* Main container - 1180px width, 2px border, 8px radius, ultra-compact spacing */
.vitamin-calculator-container {
  position: relative;              /* Position reference for dark mode toggle button */
  max-width: 1180px;               /* 1180px for complex layout */
  width: 100%;
  margin: 8px auto;                /* Ultra-compact: 8px */
  padding: 8px;                    /* Ultra-compact: 8px */
  background: var(--bg-primary);
  border: 2px solid var(--border-color);    /* 2px */
  border-radius: var(--radius-container);   /* 8px */
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif; /* No external fonts */
  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: 2px 2px 0 rgba(0,0,0,0.15);
  font-size: 17.5px;               /* Increased: 17.5px (from 15.5px, +2px) */
  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;
}

.dark-mode-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

.calculator-header h2 {
  margin: 0 0 6px 0;
  font-size: 26px;                 /* Increased: 26px (from 24px, +2px) */
  font-weight: 700;
  color: var(--title-color);
  text-shadow: var(--title-shadow);
  line-height: 1.2;
}

.subtitle {
  margin: 0;
  font-size: 16px;                 /* Increased: 16px (from 14px, +2px) */
  color: var(--text-light);
  line-height: 1.4;
}

/* ================================
   Privacy Notice
   ================================ */
.privacy-notice {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  margin-bottom: 8px;              /* Ultra-compact: 8px */
  background: #e8f5e9;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-sm);
}

.vitamin-calculator-container.dark .privacy-notice {
  background: #2d4a2e;
}

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

.privacy-text {
  font-size: 15px;                 /* Increased: 15px (from 13px, +2px) */
  line-height: 1.5;
  color: var(--text-primary);
}

.privacy-text strong {
  color: var(--color-success);
  font-weight: 700;
}

/* ================================
   Quick Action Buttons
   ================================ */
.quick-actions {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;              /* Ultra-compact: 8px */
  justify-content: center;
  flex-wrap: wrap;
}

.btn-sample,
.btn-reset {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);    /* 1px for auxiliary buttons */
  border-radius: var(--radius-button);
  font-size: 16px;                 /* Increased: 16px (from 14px, +2px) */
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
  font-family: inherit;
}

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

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

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

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

.btn-sample:focus-visible,
.btn-reset:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ================================
   Common Section Styles
   ================================ */
.input-section,
.result-section,
.info-section {
  background: var(--bg-section);
  border: 1px solid var(--border-color);    /* 1px for sections */
  border-radius: var(--radius-section);
  padding: 8px;                              /* Ultra-compact: 8px */
  box-shadow: var(--shadow-md);
  margin-bottom: 8px;                        /* Ultra-compact: 8px */
}

/* Section title */
.section-title {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 8px 0;               /* Ultra-compact: 8px */
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
  font-size: 18px;                 /* Increased: 18px (from 16px, +2px) */
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

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

.result-section .section-title {
  color: var(--color-success);
}

.info-section .section-title {
  color: var(--color-warning);
}

/* ================================
   Input Section - 6 Column Grid
   ================================ */
.input-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);  /* 6 equal columns to minimize vertical space */
  gap: 8px;                               /* Ultra-compact: 8px */
  margin-bottom: 8px;
}

.input-group {
  display: flex;
  flex-direction: column;
}

.input-group label {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;                 /* Increased: 16px (from 14px, +2px) */
  font-weight: 500;
  color: var(--text-primary);
}

/* Input elements */
.text-input,
.select-input {
  width: 100%;
  padding: 7px;
  border: 1px solid var(--border-color);    /* 1px for input fields */
  border-radius: var(--radius-input);
  background: var(--bg-secondary);
  font-size: 18px;                 /* Increased: 18px (from 16px, +2px) */
  font-weight: 500;
  color: var(--text-primary);
  font-family: inherit;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.text-input:focus,
.select-input:focus {
  outline: none;
  background: var(--input-focus-bg);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
}

.text-input::placeholder {
  color: #999;
}

/* Number inputs with monospace font */
input[type="number"] {
  font-family: 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* Calculate button - Main action (1.5px border) */
.btn-calculate {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--color-accent);
  border: 1.5px solid var(--border-color);    /* 1.5px for main button */
  border-radius: var(--radius-button);
  font-size: 18px;                 /* Increased: 18px (from 16px, +2px) */
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
  font-family: inherit;
}

.btn-calculate:hover {
  filter: brightness(1.05);
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
}

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

.btn-calculate:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ================================
   Result Section - 4 Column Grid
   ================================ */

/* Empty state */
.result-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  color: var(--text-light);
  min-height: 150px;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.result-empty p {
  margin: 0;
  font-size: 16px;                 /* Increased: 16px (from 14px, +2px) */
  line-height: 1.6;
}

/* Result grid - 4 columns */
.result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);  /* 4 equal columns for 12 vitamins (3 rows) */
  gap: 8px;                                /* Ultra-compact: 8px */
  margin-bottom: 8px;
}

/* Vitamin result items */
.vitamin-result-item {
  padding: 8px;
  background: var(--bg-secondary);
  border: 1px solid #ddd;
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-sm);
}

.vitamin-calculator-container.dark .vitamin-result-item {
  background: #3a3a3a;
  border-color: #555;
}

.vitamin-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 6px;
  padding-bottom: 4px;
  border-bottom: 1px dashed #ccc;
}

.vitamin-calculator-container.dark .vitamin-header {
  border-bottom-color: #555;
}

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

.vitamin-amount {
  font-size: 22px;                 /* Increased: 22px (from 20px, +2px) - Core result */
  font-weight: 700;
  color: var(--color-success);
  font-family: 'Courier New', monospace;
  letter-spacing: 0.5px;
}

.vitamin-amount-visual {
  margin: 6px 0;
}

.amount-bar {
  width: 100%;
  height: 8px;
  background: #e0e0e0;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  margin-bottom: 4px;
}

.vitamin-calculator-container.dark .amount-bar {
  background: #4a4a4a;
}

.amount-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-success), var(--color-warning));
  transition: width 0.5s ease;
  border-radius: 3px;
}

.amount-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
}

.limit-label {
  color: var(--color-danger);
  font-weight: 600;
}

.vitamin-foods {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed #ddd;
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.vitamin-calculator-container.dark .vitamin-foods {
  border-top-color: #555;
}

.food-tag {
  display: inline-block;
  padding: 2px 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Result action buttons */
.result-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 1px 1px 0 rgba(0,0,0,0.15);
  font-family: inherit;
}

.btn-action:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 0.5px 0.5px 0 rgba(0,0,0,0.15);
  background: var(--copy-btn-hover-bg);
}

.btn-action:active {
  transform: translate(1px, 1px);
  box-shadow: none;
}

.btn-action:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-action svg {
  flex-shrink: 0;
}

/* ================================
   Information Section - 4 Column Accordion Grid
   ================================ */

.accordion-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);  /* 4 equal columns for 12 vitamins (3 rows) */
  gap: 6px;
}

.accordion-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
  border-radius: var(--radius-section);
}

.accordion-header:hover {
  background: var(--copy-btn-hover-bg);
}

.accordion-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.accordion-icon {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  transition: transform 0.3s;
}

.accordion-header.active .accordion-icon {
  transform: rotate(45deg);
}

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

.accordion-content.active {
  max-height: 300px;
}

.accordion-content p {
  padding: 0 10px 8px 10px;
  margin: 0 0 4px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.accordion-content p:last-child {
  margin-bottom: 0;
  padding-bottom: 10px;
}

/* ================================
   Footer Note
   ================================ */
.footer-note {
  padding: 10px 12px;
  background: #fff3cd;
  border: 2px dashed var(--color-warning);
  border-radius: var(--radius-section);
}

.vitamin-calculator-container.dark .footer-note {
  background: #4a3a1a;
  border-color: #f5b041;
}

.footer-note p {
  margin: 0 0 6px 0;
  font-size: 16px;                 /* Increased: 16px (from 14px, +2px) */
  font-weight: 700;
  color: var(--text-primary);
}

.footer-note ul {
  margin: 0;
  padding-left: 20px;
  list-style-type: disc;
}

.footer-note li {
  font-size: 15px;                 /* Increased: 15px (from 13px, +2px) */
  color: var(--text-secondary);
  margin-bottom: 4px;
  line-height: 1.5;
}

.footer-note li:last-child {
  margin-bottom: 0;
}

/* ================================
   Responsive Design
   ================================ */

/* Tablet and below - Reduce columns */
@media (max-width: 768px) {
  .vitamin-calculator-container {
    margin: 6px 5px;
    padding: 7px;
    width: calc(100% - 10px);
  }

  .input-grid {
    grid-template-columns: repeat(3, 1fr);  /* 3 columns on tablet */
  }

  .result-grid {
    grid-template-columns: repeat(2, 1fr);  /* 2 columns on tablet */
  }

  .accordion-grid {
    grid-template-columns: repeat(2, 1fr);  /* 2 columns on tablet */
  }

  .quick-actions {
    flex-wrap: wrap;
  }

  .btn-sample,
  .btn-reset {
    flex: 1 1 calc(50% - 3px);
  }
}

/* Mobile - Single column for everything */
@media (max-width: 480px) {
  .vitamin-calculator-container {
    margin: 5px 3px;
    padding: 6px;
    border-width: 1px;
    width: calc(100% - 6px);
  }

  .calculator-header h2 {
    font-size: 22px;
  }

  .subtitle {
    font-size: 14px;
  }

  .privacy-notice {
    flex-direction: column;
    text-align: center;
    gap: 6px;
    padding: 8px;
  }

  .input-grid {
    grid-template-columns: 1fr;    /* Single column on mobile */
  }

  .result-grid {
    grid-template-columns: 1fr;    /* Single column on mobile */
  }

  .accordion-grid {
    grid-template-columns: 1fr;    /* Single column on mobile */
  }

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

  .section-title {
    font-size: 16px;
  }

  .btn-sample,
  .btn-reset {
    flex: 1 1 100%;
    justify-content: center;
  }

  .result-actions {
    flex-direction: column;
  }

  .btn-action {
    width: 100%;
    justify-content: center;
  }
}

/* ================================
   Print Styles
   ================================ */
@media print {
  .vitamin-calculator-container {
    margin: 0;
    padding: 20px;
    border: none;
    box-shadow: none;
    background: white;
  }
  
  .dark-mode-toggle,
  .quick-actions,
  .input-section,
  .btn-calculate,
  .result-actions,
  .footer-note {
    display: none !important;
  }
  
  .result-section {
    border: 1px solid #000;
    page-break-inside: avoid;
  }
  
  .vitamin-result-item {
    page-break-inside: avoid;
    border: 1px solid #000;
  }
}