/* ==========================================================
   main.css — 전역 공통 기반 (모든 페이지에서 로드)
   - CSS 변수 정의
   - 리셋 및 기본 타이포그래피
   - Pretendard 폰트 설정
   ========================================================== */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* ── 디자인 토큰 ── */
:root {
  /* 색상 */
  --color-primary:        #4f46e5;
  --color-primary-hover:  #4338ca;
  --color-primary-light:  #ede9fe;
  --color-bg:             #f5f6fa;
  --color-surface:        #ffffff;
  --color-border:         #e5e7eb;
  --color-text:           #1f2937;
  --color-text-secondary: #6b7280;
  --color-danger:         #b91c1c;
  --color-danger-bg:      #fef2f2;
  --color-danger-border:  #fca5a5;
  --color-success:        #15803d;
  --color-success-bg:     #f0fdf4;
  --color-success-border: #86efac;

  /* 레이아웃 */
  --sidebar-width:           15rem;
  --sidebar-collapsed-width: 4rem;
  --header-height:           3.5rem;

  /* 공통 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-sm: 0 0.0625rem 0.25rem rgba(0, 0, 0, 0.06);
  --shadow-md: 0 0.25rem 1rem rgba(0, 0, 0, 0.10);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

img {
  display: block;
  max-width: 100%;
}

/* ── 공통 컴포넌트 ── */

/* 버튼 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s, color 0.2s;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background-color: var(--color-primary-hover);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 0.0625rem solid var(--color-primary);
}

.btn--outline:hover {
  background-color: var(--color-primary-light);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn--ghost:hover {
  background-color: var(--color-border);
  color: var(--color-text);
}

.btn--full {
  width: 100%;
  padding: 0.75rem;
}

.btn--lg {
  padding: 0.75rem 2rem;
  font-size: 1rem;
}

/* 아바타 */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 700;
  flex-shrink: 0;
}

.avatar--sm {
  width: 2rem;
  height: 2rem;
  font-size: 0.85rem;
}

.avatar--md {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1rem;
}

.avatar--lg {
  width: 4rem;
  height: 4rem;
  font-size: 1.5rem;
}

/* 배지 */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 99rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* 알림 */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.alert--error {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
  border: 0.0625rem solid var(--color-danger-border);
}

.alert--success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 0.0625rem solid var(--color-success-border);
}

/* 폼 */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input {
  padding: 0.625rem 0.875rem;
  border: 0.0625rem solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
  background-color: var(--color-surface);
}

.form-group input:focus {
  border-color: var(--color-primary);
}

/* 유틸리티 */
.text-muted { color: var(--color-text-secondary); }