:root {
  /* Color System */
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(226, 232, 240, 0.8);
  
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  
  --secondary: #06B6D4;
  --secondary-hover: #0891B2;
  --secondary-light: #ECFEFF;
  
  --accent: #8B5CF6;
  --accent-light: #F5F3FF;
  
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  
  --success: #10B981;
  --success-light: #ECFDF5;
  --warning: #F59E0B;
  --warning-light: #FFFBEB;
  --error: #EF4444;
  --error-light: #FEF2F2;
  
  /* Sidebar */
  --sidebar-bg: #0F172A;
  --sidebar-hover: rgba(255, 255, 255, 0.08);
  --sidebar-active: linear-gradient(135deg, rgba(79, 70, 229, 0.6) 0%, rgba(6, 182, 212, 0.4) 100%);
  
  /* Dimensions & Physics */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --topbar-height: 70px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-premium: 0 20px 25px -5px rgba(79, 70, 229, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  
  --transition-normal: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.hidden {
  display: none !important;
}

/* Layout Container */
#app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* Glassmorphism Panel helper */
.glass-panel {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
}

/* Sidebar */
#sb {
  width: var(--sidebar-width);
  background-color: var(--sidebar-bg);
  color: #F8FAFC;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: var(--transition-normal);
  z-index: 100;
  position: relative;
  box-shadow: 4px 0 20px rgba(15, 23, 42, 0.15);
}

#sb.coll {
  width: var(--sidebar-collapsed-width);
}

.sb-head {
  height: var(--topbar-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.sb-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.sb-brand {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #E2E8F0 0%, #94A3B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  transition: opacity 0.2s ease;
}

#sb.coll .sb-brand {
  opacity: 0;
  pointer-events: none;
}

.sb-toggle {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.45);
  font-size: 20px;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.sb-toggle:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.05);
}

#sb.coll .sb-toggle {
  margin: 0 auto;
}

.sb-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sb-sec {
  font-size: 10px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.3);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 18px 12px 6px;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity 0.2s ease;
}

#sb.coll .sb-sec {
  opacity: 0;
  height: 0;
  padding: 0;
}

.ni {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.65);
  transition: var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  font-weight: 500;
}

.ni:hover {
  background-color: var(--sidebar-hover);
  color: #FFF;
}

.ni.on {
  background: var(--sidebar-active);
  color: #FFF;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
}

.ni-ic {
  font-size: 18px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.ni-label {
  font-size: 13.5px;
  transition: opacity 0.2s ease;
}

#sb.coll .ni-label {
  opacity: 0;
  width: 0;
  pointer-events: none;
}

.sb-user {
  padding: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.su-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.su-av {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #FFF;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(139, 92, 246, 0.25);
}

.su-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.su-name {
  font-size: 13.5px;
  font-weight: 600;
  color: #F8FAFC;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.su-role {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sb-logout {
  color: rgba(255, 255, 255, 0.35);
  font-size: 18px;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.sb-logout:hover {
  color: var(--error);
  background-color: rgba(239, 68, 68, 0.1);
}

#sb.coll .su-info, 
#sb.coll .sb-logout {
  display: none;
}

/* Main Area */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Topbar */
#tb {
  height: var(--topbar-height);
  background-color: #FFF;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 20px;
  flex-shrink: 0;
  z-index: 10;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.mob-menu {
  display: none;
  font-size: 24px;
  color: var(--text-muted);
  padding: 4px;
}

.tb-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-main);
  flex: 1;
}

.tb-act {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Viewport content */
#view {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
  background-color: var(--bg-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  transition: var(--transition-normal);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-p {
  background: linear-gradient(135deg, var(--primary) 0%, #6366F1 100%);
  color: #FFF;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.btn-p:hover {
  opacity: 0.95;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
  transform: translateY(-1px);
}

.btn-o {
  background-color: #FFF;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-o:hover {
  background-color: var(--primary-light);
  transform: translateY(-1px);
}

.btn-g {
  background: linear-gradient(135deg, var(--success) 0%, #34D399 100%);
  color: #FFF;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-g:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-r {
  background: linear-gradient(135deg, var(--error) 0%, #F87171 100%);
  color: #FFF;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.btn-r:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-ghost {
  background-color: #FFF;
  color: var(--text-muted);
  border: 1px solid var(--card-border);
}

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

.btn-sm {
  padding: 8px 14px;
  font-size: 12.5px;
  border-radius: var(--radius-sm);
}

.btn-xs {
  padding: 5px 10px;
  font-size: 11.5px;
  border-radius: 6px;
}

/* Cards & Layout Grid */
.card {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 24px;
  transition: var(--transition-normal);
  margin-bottom: 24px;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--bg-secondary);
  padding-bottom: 12px;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.g4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.g3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.g2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

/* Stat Cards */
.stat-card {
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.sc-blue::before { background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%); }
.sc-green::before { background: linear-gradient(90deg, var(--success) 0%, #34D399 100%); }
.sc-orange::before { background: linear-gradient(90deg, var(--warning) 0%, #FBBF24 100%); }
.sc-purple::before { background: linear-gradient(90deg, var(--accent) 0%, #A78BFA 100%); }

.sc-val {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 6px;
}

.sc-lbl {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.sc-ico {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 44px;
  opacity: 0.08;
}

/* Modern Tables */
.tw {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--card-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #FFF;
  text-align: left;
}

th {
  padding: 14px 18px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.75px;
  border-bottom: 2px solid var(--card-border);
  background-color: var(--bg-primary);
  white-space: nowrap;
}

td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--card-border);
  font-size: 13.5px;
  color: var(--text-main);
  vertical-align: middle;
  transition: var(--transition-fast);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: var(--primary-light);
}

/* Badges */
.bdg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.bdg-b { background-color: var(--primary-light); color: var(--primary); }
.bdg-g { background-color: var(--success-light); color: var(--success); }
.bdg-o { background-color: var(--warning-light); color: var(--warning); }
.bdg-r { background-color: var(--error-light); color: var(--error); }
.bdg-p { background-color: var(--accent-light); color: var(--accent); }
.bdg-gr { background-color: var(--bg-secondary); color: var(--text-muted); }

/* Forms & Inputs */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-sec {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 24px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--card-border);
}

.fg {
  margin-bottom: 16px;
}

.fl {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.fi {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-md);
  outline: none;
  background-color: #FFF;
  transition: var(--transition-normal);
  color: var(--text-main);
}

.fi:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
  background-color: #FFF;
}

.fi-sm {
  padding: 9px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

/* Modals */
.ov {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.4);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 0.2s ease-out;
}

.md {
  background-color: #FFF;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.md-hd {
  padding: 24px 28px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--card-border);
}

.md-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
}

.md-close {
  font-size: 24px;
  color: var(--text-light);
  line-height: 1;
  transition: var(--transition-fast);
  padding: 4px;
  border-radius: 50%;
}

.md-close:hover {
  color: var(--text-main);
  background-color: var(--bg-secondary);
}

.md-body {
  padding: 24px 28px;
  overflow-y: auto;
  flex: 1;
}

.md-ft {
  padding: 16px 28px 24px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  border-top: 1px solid var(--card-border);
  background-color: var(--bg-primary);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1.5px solid var(--card-border);
  margin-bottom: 24px;
}

.tab {
  padding: 12px 20px;
  font-weight: 600;
  font-size: 13.5px;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition-fast);
}

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

.tab.on {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-pane {
  display: none;
}

.tab-pane.on {
  display: block;
  animation: fadeIn 0.2s ease-out;
}

/* Auth Pages */
#authPage {
  min-height: 100vh;
  display: flex;
  background-color: #FFF;
}

.auth-left {
  flex: 1.2;
  background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4F46E5 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: #FFF;
  position: relative;
  overflow: hidden;
}

.auth-left::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  top: -200px;
  left: -200px;
}

.auth-left h1 {
  font-size: 54px;
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #FFF 30%, #C7D2FE 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 1;
}

.auth-left p {
  color: #C7D2FE;
  font-size: 17px;
  margin-bottom: 60px;
  z-index: 1;
  font-weight: 500;
}

.auth-feat {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 380px;
  z-index: 1;
}

.auth-feat-item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 18px;
  transition: var(--transition-normal);
}

.auth-feat-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.auth-feat-icon {
  font-size: 28px;
  width: 46px;
  height: 46px;
  background-color: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-feat-text strong {
  display: block;
  font-size: 14.5px;
  font-weight: 700;
  margin-bottom: 2px;
  color: #FFF;
}

.auth-feat-text span {
  font-size: 12.5px;
  color: #94A3B8;
}

.auth-right {
  width: 520px;
  background-color: #FFF;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.03);
}

.auth-logo-sm {
  font-size: 32px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.auth-sub {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 40px;
  font-weight: 500;
}

.auth-box {
  width: 100%;
  max-width: 380px;
}

.auth-tabs {
  display: flex;
  border-bottom: 2px solid var(--card-border);
  margin-bottom: 28px;
}

.auth-tab {
  flex: 1;
  padding: 12px;
  text-align: center;
  font-weight: 700;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition-fast);
  border-bottom: 2.5px solid transparent;
  margin-bottom: -2.5px;
}

.auth-tab.on {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.btn-auth {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #FFF;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 15.5px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
  transition: var(--transition-normal);
  margin-top: 8px;
}

.btn-auth:hover {
  opacity: 0.95;
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
  transform: translateY(-1px);
}

.divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
  color: var(--text-light);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--card-border);
}

.social-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.soc-btn {
  padding: 12px;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-md);
  background-color: #FFF;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 13px;
  transition: var(--transition-normal);
}

.soc-btn:hover {
  border-color: var(--text-light);
  background-color: var(--bg-primary);
  transform: translateY(-1px);
}

.soc-btn i {
  font-size: 16px;
}

.soc-g { color: #EA4335; }
.soc-n { color: #03C75A; }
.soc-k { color: #3B1E1E; background-color: #FEE500; border-color: #FEE500; }
.soc-k:hover { background-color: #FADA0A; border-color: #FADA0A; }
.soc-a { color: #000; background-color: #000; border-color: #000; color: #FFF; }
.soc-a:hover { background-color: #1A1A1A; border-color: #1A1A1A; }

.verify-box {
  text-align: center;
}

.verify-hint {
  background-color: var(--success-light);
  border: 1.5px solid rgba(16, 185, 129, 0.2);
  color: #047857;
  padding: 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 20px;
  line-height: 1.5;
}

.verify-timer {
  font-size: 13px;
  color: var(--error);
  font-weight: 700;
  margin-top: 6px;
}

.auth-err {
  background-color: var(--error-light);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--error);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 16px;
  font-weight: 500;
  animation: shake 0.4s ease;
}

/* OTP Timer & Dialog Customization */
.otp-dialog-body {
  text-align: center;
  padding: 12px 0;
}

.otp-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
}

.otp-email-lbl {
  color: var(--text-muted);
  font-size: 13.5px;
  margin-bottom: 24px;
}

.otp-inputs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 20px 0;
}

.otp-input {
  width: 50px;
  height: 56px;
  border: 2px solid var(--card-border);
  border-radius: var(--radius-md);
  font-size: 24px;
  font-weight: 800;
  text-align: center;
  outline: none;
  transition: var(--transition-fast);
}

.otp-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

/* Empty State */
.empty {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
  background-color: #FFF;
  border-radius: var(--radius-lg);
  border: 1.5px dashed var(--card-border);
}

.ei {
  font-size: 54px;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty p {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.empty small {
  font-size: 13px;
  color: var(--text-muted);
}

/* Student Detail & Sub-layouts */
.st-profile-card {
  background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
  color: #FFF;
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-lg);
}

.st-profile-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.st-profile-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.15);
  border: 2px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.st-profile-details h2 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 4px;
}

.st-profile-details p {
  font-size: 13.5px;
  color: #C7D2FE;
  display: flex;
  gap: 12px;
}

.st-profile-actions {
  display: flex;
  gap: 8px;
}

.grade-chart-container {
  height: 220px;
  margin-top: 10px;
  position: relative;
}

/* Timeline */
.tl {
  position: relative;
  padding-left: 24px;
}

.tl::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 0;
  width: 2px;
  background-color: var(--card-border);
}

.tl-item {
  position: relative;
  margin-bottom: 24px;
}

.tl-dot {
  position: absolute;
  left: -22px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary);
  border: 2px solid #FFF;
  box-shadow: 0 0 0 2px var(--primary);
}

.tl-date {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 6px;
}

.tl-box {
  background-color: #FFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.tl-box:hover {
  border-color: var(--text-light);
  box-shadow: var(--shadow-md);
}

.tl-ttl {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.tl-body {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

.tl-footer {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--bg-secondary);
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
}

/* Filter Bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.srch {
  position: relative;
  flex: 1;
  min-width: 240px;
}

.srch input {
  width: 100%;
  padding: 11px 16px 11px 40px;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-md);
  outline: none;
  font-size: 13.5px;
  transition: var(--transition-normal);
  background-color: #FFF;
}

.srch input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.srch::before {
  content: '🔍';
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  pointer-events: none;
  opacity: 0.6;
}

.filter-bar select {
  padding: 11px 16px;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-md);
  outline: none;
  background-color: #FFF;
  font-size: 13.5px;
  min-width: 140px;
  transition: var(--transition-normal);
}

.filter-bar select:focus {
  border-color: var(--primary);
}

/* Toast System */
#toast-wrap {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15);
  animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: #FFF;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.t-ok { background: linear-gradient(135deg, var(--success) 0%, #34D399 100%); }
.t-err { background: linear-gradient(135deg, var(--error) 0%, #F87171 100%); }
.t-info { background: linear-gradient(135deg, var(--primary) 0%, #6366F1 100%); }

/* Mobile Overlay */
#sb-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  z-index: 99;
  backdrop-filter: blur(4px);
}

#sb-overlay.show {
  display: block;
}

/* Grade Entry Grid styling */
.grade-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.grade-cell {
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 10px;
  text-align: center;
}

.grade-cell label {
  display: block;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.grade-cell input {
  width: 100%;
  max-width: 60px;
  padding: 8px;
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 16px;
  font-weight: 800;
  outline: none;
  transition: var(--transition-fast);
}

.grade-cell input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.grade-avg-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #FFF;
  border-radius: var(--radius-md);
  padding: 18px;
  text-align: center;
  margin-top: 16px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
}

.ga-val {
  font-size: 36px;
  font-weight: 900;
  line-height: 1.1;
}

.ga-lbl {
  font-size: 12px;
  opacity: 0.85;
  font-weight: 500;
  margin-top: 2px;
}

/* Target Grade Simulator styling */
.simulator-card {
  background-color: var(--accent-light);
  border: 1.5px dashed var(--accent);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-top: 20px;
}

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.sim-body {
  display: flex;
  align-items: center;
  gap: 20px;
}

.sim-slider-container {
  flex: 1;
}

.sim-slider-container input[type=range] {
  width: 100%;
  height: 6px;
  background-color: var(--card-border);
  border-radius: 3px;
  outline: none;
}

.sim-results {
  background-color: #FFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  text-align: center;
  min-width: 120px;
  box-shadow: var(--shadow-sm);
}

.sim-results-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
}

/* College Recommendation Grid */
.rec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.rec-card {
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 2px solid var(--card-border);
  background-color: #FFF;
  transition: var(--transition-normal);
}

.rec-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.rc-chal { border-color: rgba(239, 68, 68, 0.4); background-color: var(--error-light); }
.rc-match { border-color: rgba(79, 70, 229, 0.4); background-color: var(--primary-light); }
.rc-safe { border-color: rgba(16, 185, 129, 0.4); background-color: var(--success-light); }

.rc-lbl {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.rc-chal .rc-lbl { color: var(--error); }
.rc-match .rc-lbl { color: var(--primary); }
.rc-safe .rc-lbl { color: var(--success); }

.rc-uni {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 2px;
}

.rc-dept {
  font-size: 13.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.rc-tier {
  font-size: 11px;
  color: var(--text-light);
  margin-top: 8px;
  font-weight: 600;
}

/* Counseling Suggestion Templates */
.counsel-tpl-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.counsel-tpl-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.counsel-tpls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.counsel-tpl-item {
  padding: 10px 14px;
  background-color: #FFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition-fast);
  text-align: left;
}

.counsel-tpl-item:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--primary);
}

/* Notice banners */
.notice {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  line-height: 1.5;
}

.n-info { background-color: var(--primary-light); color: var(--primary); border: 1.5px solid rgba(79, 70, 229, 0.15); }
.n-ok { background-color: var(--success-light); color: var(--success); border: 1.5px solid rgba(16, 185, 129, 0.15); }
.n-warn { background-color: var(--warning-light); color: var(--warning); border: 1.5px solid rgba(245, 158, 11, 0.15); }

/* Keyframe animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

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

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .g3 { grid-template-columns: repeat(2, 1fr); }
  .rec-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .auth-left { display: none; }
  .auth-right { width: 100%; padding: 40px 24px; }
  
  #sb {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    transform: translateX(-100%);
    width: var(--sidebar-width) !important;
  }
  
  #sb.mob-open {
    transform: translateX(0);
  }
  
  .mob-menu {
    display: block;
  }
  
  #view {
    padding: 20px;
  }
  
  #tb {
    padding: 0 20px;
  }
  
  .g2, .g3, .g4, .rec-grid, .form-grid {
    grid-template-columns: 1fr;
  }
  
  .st-profile-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  
  .st-profile-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

/* ──────────────────────────────────────────────────────────
   PRINT MEDIA STYLES (상담 리포트 출력 최적화)
   ────────────────────────────────────────────────────────── */
@media print {
  body {
    background-color: #FFF !important;
    color: #000 !important;
    font-size: 12px;
  }

  /* Hide navigation, topbar, buttons and overlays */
  #sb, #sb-overlay, #tb, .tb-act, .btn, .st-profile-actions, .tabs, .filter-bar, #toast-wrap, .ov {
    display: none !important;
  }

  #app {
    display: block !important;
    height: auto !important;
    overflow: visible !important;
  }

  #main {
    display: block !important;
    height: auto !important;
    overflow: visible !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  #view {
    padding: 0 !important;
    background-color: #FFF !important;
    overflow: visible !important;
  }

  .card {
    border: 1px solid #CCC !important;
    box-shadow: none !important;
    transform: none !important;
    background-color: #FFF !important;
    page-break-inside: avoid;
    margin-bottom: 20px !important;
    padding: 15px !important;
  }

  .st-profile-card {
    background: #FFF !important;
    color: #000 !important;
    border: 2px solid #000 !important;
    box-shadow: none !important;
    padding: 20px !important;
  }

  .st-profile-avatar {
    border-color: #000 !important;
    color: #000 !important;
    background-color: #EEE !important;
  }

  .st-profile-details p {
    color: #333 !important;
  }

  .tl::before {
    background-color: #999 !important;
  }

  .tl-box {
    border: 1px solid #999 !important;
    box-shadow: none !important;
  }

  th {
    background-color: #EEE !important;
    border-bottom: 2px solid #333 !important;
    color: #000 !important;
  }

  td {
    border-bottom: 1px solid #DDD !important;
  }

  /* Display print-only elements */
  .print-only {
    display: block !important;
  }
}