/* =============================================
   ImageSEO - main.css
   전체 레이아웃 & CSS 변수
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

/* ─── CSS 변수 ─────────────────────────────── */
:root {
  --bg-primary:    #0a0a0f;
  --bg-secondary:  #0f0f1a;
  --bg-card:       #13131f;
  --bg-card-hover: #1a1a2e;
  --border:        #1e1e35;
  --border-glow:   #00d4ff33;

  --neon-blue:     #00d4ff;
  --neon-purple:   #7b2fff;
  --neon-green:    #00ff88;
  --neon-red:      #ff4466;
  --neon-yellow:   #ffd700;

  --text-primary:  #f0f0f8;
  --text-secondary:#b8b8d0;
  --text-muted:    #8a8aaa;

  --font-title:    'Rajdhani', sans-serif;
  --font-body:     'Noto Sans KR', sans-serif;

  --radius-sm:     4px;
  --radius-md:     8px;
  --radius-lg:     16px;

  --shadow-neon:   0 0 20px rgba(0, 212, 255, 0.15);
  --shadow-card:   0 4px 24px rgba(0, 0, 0, 0.4);
  --transition:    0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--neon-blue);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #fff; }

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

/* ─── 스크롤바 커스텀 ──────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--neon-purple); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--neon-blue); }

/* ─── 헤더 ─────────────────────────────────── */
.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 700;
  color: var(--neon-blue);
  letter-spacing: 1px;
  text-shadow: 0 0 20px var(--neon-blue);
}

.logo svg { width: 28px; height: 28px; }
.logo span.accent { color: var(--neon-purple); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-nav a {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--neon-blue);
  background: var(--border-glow);
}

/* ─── 메인 레이아웃 ────────────────────────── */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ─── 섹션 제목 ─────────────────────────────── */
.section-title {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
}

/* ─── 카드 ─────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-neon);
}

/* ─── 버튼 ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  color: #fff;
}
.btn-primary:hover {
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-secondary:hover {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
}

.btn-danger {
  background: transparent;
  border: 1px solid var(--neon-red);
  color: var(--neon-red);
}
.btn-danger:hover {
  background: var(--neon-red);
  color: #fff;
}

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 15px; }

/* ─── 배지 ─────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.badge-blue   { background: rgba(0,212,255,0.15); color: var(--neon-blue); }
.badge-green  { background: rgba(0,255,136,0.15); color: var(--neon-green); }
.badge-red    { background: rgba(255,68,102,0.15); color: var(--neon-red); }
.badge-yellow { background: rgba(255,215,0,0.15); color: var(--neon-yellow); }
.badge-gray   { background: rgba(144,144,176,0.15); color: var(--text-secondary); }

/* ─── 폼 요소 ──────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { resize: vertical; min-height: 100px; }

/* ─── 푸터 ─────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 80px;
}

.site-footer span { color: var(--neon-blue); }

/* ─── 유틸리티 ─────────────────────────────── */
.text-neon   { color: var(--neon-blue); }
.text-purple { color: var(--neon-purple); }
.text-green  { color: var(--neon-green); }
.text-red    { color: var(--neon-red); }
.text-muted  { color: var(--text-muted); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8  { gap: 8px; }
.gap-16 { gap: 16px; }
.mt-8   { margin-top: 8px; }
.mt-16  { margin-top: 16px; }
.mt-24  { margin-top: 24px; }
.mb-16  { margin-bottom: 16px; }

/* ─── 알림 토스트 ──────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  min-width: 280px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.3s ease;
  box-shadow: var(--shadow-card);
}

.toast.success { border-left: 3px solid var(--neon-green); }
.toast.error   { border-left: 3px solid var(--neon-red); }
.toast.info    { border-left: 3px solid var(--neon-blue); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);   opacity: 1; }
}

/* ─── 로딩 스피너 ──────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--neon-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── 네온 구분선 ──────────────────────────── */
.neon-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
  margin: 32px 0;
  opacity: 0.4;
}