:root {
  --bg-dark: #090d16;
  --bg-card: rgba(18, 26, 43, 0.85);
  --bg-card-hover: rgba(28, 40, 65, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(59, 130, 246, 0.4);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --primary: #2563eb;
  --primary-glow: rgba(37, 99, 235, 0.35);
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(15, 23, 42, 0.6) 0px, transparent 100%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(9, 13, 22, 0.85);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-badge {
  background: linear-gradient(135deg, #1e40af, #2563eb);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 0 15px var(--primary-glow);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand-title span.sub {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 400;
  border-left: 1px solid var(--border-color);
  padding-left: 0.6rem;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
}

.status-dot {
  width: 7px;
  height: 7px;
  background-color: #34d399;
  border-radius: 50%;
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
}

.btn-logout {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.8rem;
  margin-left: 0.5rem;
  transition: var(--transition);
}
.btn-logout:hover { color: var(--accent-rose); }

/* Navigation Tabs */
.nav-container {
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.4);
  padding: 0 2rem;
  overflow-x: auto;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.9rem 1.25rem;
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: #38bdf8;
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #38bdf8);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 -2px 10px rgba(56, 189, 248, 0.5);
}

.tab-badge {
  font-size: 0.68rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
}

/* Layout */
.main-wrapper {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 2rem;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Section */
.hero-banner {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15), transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  background: rgba(37, 99, 235, 0.2);
  border: 1px solid rgba(37, 99, 235, 0.4);
  color: #60a5fa;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 0.85rem;
}

.hero-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 800px;
  line-height: 1.7;
}

/* Stat Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 0.35rem;
}

.stat-note {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Proposal Clauses List */
.clause-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  overflow: hidden;
  transition: var(--transition);
}

.clause-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
}

.clause-header {
  padding: 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.clause-title-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.clause-number {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
}

.clause-category {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.clause-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.clause-body {
  padding: 1.5rem;
}

.clause-content {
  font-size: 0.95rem;
  color: #e2e8f0;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.clause-rationale {
  background: rgba(0, 0, 0, 0.25);
  border-left: 3px solid var(--accent-cyan);
  padding: 0.85rem 1.15rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.clause-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px dashed var(--border-color);
  padding-top: 1.25rem;
}

/* Badges */
.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-pending {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
}

.badge-review {
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #38bdf8;
}

.badge-reask {
  background: rgba(244, 63, 94, 0.15);
  border: 1px solid rgba(244, 63, 94, 0.4);
  color: #fb7185;
}

.badge-approved {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.badge-published {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.4);
  color: #a5b4fc;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 14px var(--primary-glow);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
  transform: translateY(-1px);
}

.btn-answer {
  background: linear-gradient(135deg, #0284c7, #0369a1);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
}
.btn-answer:hover {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-main);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-approve {
  background: linear-gradient(135deg, #059669, #047857);
  color: #fff;
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
}

.btn-reask {
  background: rgba(244, 63, 94, 0.15);
  border-color: rgba(244, 63, 94, 0.35);
  color: #fb7185;
}

/* Discussion Thread */
.thread-container {
  margin-top: 1rem;
  background: rgba(15, 23, 42, 0.4);
  border-radius: var(--radius-sm);
  padding: 1rem;
  border: 1px solid var(--border-color);
}

.thread-header {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.thread-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.thread-item {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.6;
}

.thread-item.client {
  background: rgba(2, 132, 199, 0.1);
  border-left: 3px solid #0284c7;
}

.thread-item.master {
  background: rgba(99, 102, 241, 0.1);
  border-left: 3px solid #6366f1;
}

.thread-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: none;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.modal-card {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 580px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  animation: modalIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* Security Alert Banner */
.security-alert-box {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.security-alert-box i {
  color: #fb7185;
  font-size: 1.2rem;
  margin-top: 0.1rem;
}

.security-alert-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fecdd3;
  margin-bottom: 0.25rem;
}

.security-alert-desc {
  font-size: 0.78rem;
  color: #fda4af;
  line-height: 1.5;
}

/* Episode Card */
.episode-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.asset-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.asset-item {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.asset-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
}

.asset-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 768px) {
  .header { padding: 0.75rem 1rem; }
  .brand-title span.sub { display: none; }
  .main-wrapper { padding: 0 1rem; }
  .hero-title { font-size: 1.4rem; }
  .clause-actions { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
}