/**
 * Chiefs Design System — "Quiet Luxury"
 * CSS 변수 + 유틸리티 클래스
 */

/* ============================================================
   1. CSS VARIABLES
   ============================================================ */

:root {
  /* Brand Colors */
  --chiefs-navy: #1a1a2e;
  --chiefs-gold: #c9a96e;
  --chiefs-gold-light: #d4b97e;
  --chiefs-gold-dark: #b8935a;

  /* Neutral */
  --chiefs-ivory: #f5f0e8;
  --chiefs-cream: #faf7f2;
  --chiefs-white: #fff;
  --chiefs-charcoal: #2d2d3a;

  /* Text */
  --chiefs-text: #1a1a1a;
  --chiefs-text-secondary: #6b6b7b;
  --chiefs-text-muted: #9b9bab;

  /* Borders */
  --chiefs-border: rgba(201, 169, 110, 0.15);
  --chiefs-border-hover: rgba(201, 169, 110, 0.5);
  --chiefs-border-subtle: rgba(26, 26, 46, 0.06);

  /* Status */
  --chiefs-success-bg: #f0f7f0;
  --chiefs-success-text: #2d5a2d;
  --chiefs-error-bg: #fdf2f2;
  --chiefs-error-text: #8b2c2c;
  --chiefs-info-bg: #f0f4fa;
  --chiefs-info-text: #2c4a8b;

  /* Typography */
  --font-body: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Noto Serif KR', Georgia, serif;

  /* Font Scale */
  --text-xs: 0.6875rem;   /* 11px */
  --text-sm: 0.8125rem;   /* 13px */
  --text-base: 0.875rem;  /* 14px */
  --text-md: 1rem;        /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 2rem;       /* 32px */

  /* Line Heights */
  --leading-tight: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  /* Letter Spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radius */
  --radius-sm: 2px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s ease;
}


/* ============================================================
   2. RESET & BASE
   ============================================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--chiefs-text);
  background-color: var(--chiefs-ivory);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
}

ul { list-style: none; }


/* ============================================================
   3. UTILITY CLASSES
   ============================================================ */

/* Labels — small-caps style (Chief.com pattern) */
.label-caps {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--chiefs-gold);
}

/* Display heading — serif */
.heading-display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  color: var(--chiefs-navy);
}

/* Gold divider — fades from center */
.gold-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--chiefs-gold), transparent);
  border: none;
  margin: var(--space-2xl) 0;
}

/* Gold divider — thin, full width */
.gold-divider-full {
  height: 1px;
  background: var(--chiefs-border);
  border: none;
  margin: var(--space-lg) 0;
}

/* Card base */
.card {
  background: var(--chiefs-cream);
  border: 1px solid var(--chiefs-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-normal);
}

.card:hover {
  border-color: var(--chiefs-border-hover);
}

/* Avatar with gold border */
.avatar {
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--chiefs-gold);
}

.avatar-sm { width: 36px; height: 36px; }
.avatar-md { width: 48px; height: 48px; }
.avatar-lg { width: 64px; height: 64px; }
.avatar-xl { width: 96px; height: 96px; }

/* Buttons */
.btn-chiefs {
  display: inline-block;
  padding: 10px 24px;
  background: var(--chiefs-navy);
  color: var(--chiefs-cream);
  border: 1px solid var(--chiefs-navy);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-chiefs:hover {
  background: transparent;
  color: var(--chiefs-navy);
}

.btn-chiefs-gold {
  background: var(--chiefs-gold);
  color: var(--chiefs-white);
  border-color: var(--chiefs-gold);
}

.btn-chiefs-gold:hover {
  background: transparent;
  color: var(--chiefs-gold);
}

.btn-chiefs-ghost {
  background: transparent;
  color: var(--chiefs-text-secondary);
  border: 1px solid var(--chiefs-border);
}

.btn-chiefs-ghost:hover {
  border-color: var(--chiefs-gold);
  color: var(--chiefs-gold);
}

/* Text link style button */
.btn-text {
  background: none;
  border: none;
  color: var(--chiefs-gold);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}

.btn-text:hover {
  color: var(--chiefs-gold-dark);
}

/* Alert/Message boxes */
.alert-success {
  background: var(--chiefs-success-bg);
  color: var(--chiefs-success-text);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--chiefs-success-text);
  font-size: var(--text-sm);
}

.alert-error {
  background: var(--chiefs-error-bg);
  color: var(--chiefs-error-text);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--chiefs-error-text);
  font-size: var(--text-sm);
}

/* Gold gradient border card (premium) */
.card-premium {
  border: 1px solid transparent;
  background-image: linear-gradient(var(--chiefs-cream), var(--chiefs-cream)),
                    linear-gradient(135deg, var(--chiefs-gold-dark), var(--chiefs-gold-light));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  border-radius: var(--radius-sm);
}

/* Form inputs — bottom border only (Quiet Luxury) */
.input-minimal {
  width: 100%;
  padding: 12px 0;
  border: none;
  border-bottom: 1px solid #dee2e6;
  background: transparent;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--chiefs-text);
  transition: border-color var(--transition-fast);
  outline: none;
}

.input-minimal:focus {
  border-bottom-color: var(--chiefs-gold);
}

.input-minimal::placeholder {
  color: var(--chiefs-text-muted);
}