/* =============================================================
   AI Agent — Synapse Violet Edition
   Foundation: tokens · reset · layout · utilities
   ============================================================= */

/* ─── Tokens ─── */
:root {
  /* 베이스 — 깊은 보라 언더톤 */
  --bg:           #0a0612;
  --bg-elevated:  #120c1f;
  --bg-deep:      #06030d;
  --bg-deeper:    #04020a;

  /* 표면 */
  --surface:    rgba(255,255,255,0.03);
  --surface-2:  rgba(255,255,255,0.05);
  --surface-3:  rgba(255,255,255,0.08);

  /* 보더 */
  --border:        rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.12);
  --border-violet: rgba(167,139,250,0.32);
  --border-faint:  rgba(255,255,255,0.04);

  /* 텍스트 */
  --text:        rgba(255,255,255,0.94);
  --text-muted:  rgba(255,255,255,0.62);
  --text-dim:    rgba(255,255,255,0.42);
  --text-faint:  rgba(255,255,255,0.22);

  /* 시그니처 — Synapse Violet */
  --violet:        #a78bfa;
  --violet-light:  #c4b5fd;
  --violet-deep:   #8b5cf6;
  --violet-soft:   rgba(167,139,250,0.10);
  --violet-glow:   0 0 22px rgba(167,139,250,0.45);
  --violet-grad:   linear-gradient(135deg, #c084fc 0%, #a78bfa 50%, #8b5cf6 100%);

  /* 마젠타/핑크 highlight */
  --magenta:       #ec4899;
  --magenta-soft:  rgba(236,72,153,0.10);
  --pink:          #f472b6;
  --pink-soft:     rgba(244,114,182,0.10);

  /* 신경망 그라디언트 */
  --neural-grad: linear-gradient(135deg,
    rgba(167,139,250,0.20) 0%,
    rgba(236,72,153,0.15) 50%,
    rgba(56,189,248,0.10) 100%);

  /* 보조 */
  --cyan:    #38bdf8;
  --emerald: #34d399;
  --amber:   #fbbf24;
  --rose:    #fb7185;

  --cyan-soft:    rgba(56,189,248,0.10);
  --emerald-soft: rgba(52,211,153,0.10);
  --amber-soft:   rgba(251,191,36,0.10);
  --rose-soft:    rgba(251,113,133,0.10);

  /* 메시지 역할 컬러 */
  --msg-user-bg:   rgba(167,139,250,0.14);
  --msg-user-bd:   rgba(167,139,250,0.32);
  --msg-ai-bg:     rgba(20,14,32,0.70);
  --msg-ai-bd:     rgba(244,114,182,0.18);

  /* 글래스 */
  --glass-bg:   rgba(18,12,31,0.74);
  --glass-blur: blur(20px) saturate(140%);

  /* 라운드 (채팅 메인 — 둥글게) */
  --r-sm:   8px;
  --r:      12px;
  --r-md:   16px;
  --r-lg:   20px;
  --r-pill: 999px;

  /* 모노 */
  --mono: 'JetBrains Mono', 'Roboto Mono', ui-monospace, 'SF Mono', monospace;

  /* 모션 */
  --t-fast: 120ms;
  --t-base: 200ms;
  --t-slow: 380ms;
  --ease:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in:  cubic-bezier(0.4, 0, 1, 1);

  /* 그림자 */
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.20);
  --shadow-md:     0 8px 24px rgba(0,0,0,0.32);
  --shadow-lg:     0 20px 48px rgba(0,0,0,0.42);
  --shadow-violet: 0 0 28px rgba(167,139,250,0.20);
  --ring-violet:   0 0 0 3px rgba(167,139,250,0.20);

  /* 레이아웃 */
  --side-w:        72px;
  --side-w-open:   240px;
  --topbar-h:      52px;
  --content-pad:   24px;
}

/* ─── Reset & base ─── */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
}
body {
  font-family: var(--kr);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse at top left, rgba(167,139,250,0.06), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(236,72,153,0.04), transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

::selection { background: rgba(167,139,250,0.40); color: #fff; }

/* 스크롤바 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(167,139,250,0.18);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(167,139,250,0.32); }

/* ─── Neural Background (선택적 — body 또는 main에 추가) ─── */
.ag-neural-bg {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 22% 28%, rgba(167,139,250,0.07), transparent 42%),
    radial-gradient(circle at 78% 72%, rgba(236,72,153,0.05), transparent 42%);
}
.ag-neural-bg::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(167,139,250,0.10) 1px, transparent 0);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  opacity: 0.6;
}

/* ─── Layout: Topbar ─── */
.ag-topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  z-index: 100;
}

.ag-topbar__hamburger {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--r);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-fast) var(--ease);
}
.ag-topbar__hamburger:hover { color: var(--violet); border-color: var(--border-violet); }

.ag-topbar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.ag-topbar__logo {
  width: 32px; height: 32px;
  background: var(--violet-grad);
  border-radius: var(--r);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  box-shadow: var(--violet-glow);
}
.ag-topbar__title {
  font-family: var(--kr);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.ag-topbar__badge {
  font-family: var(--en);
  font-size: 9px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--violet-soft);
  border: 1px solid var(--border-violet);
  color: var(--violet);
  letter-spacing: 0.10em;
}

/* 모델 선택 칩 */
.ag-topbar__model {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  height: 32px;
  background: var(--violet-soft);
  border: 1px solid var(--border-violet);
  border-radius: var(--r-pill);
  color: var(--violet-light);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
  position: relative;
}
.ag-topbar__model:hover { background: rgba(167,139,250,0.18); }
.ag-topbar__model i:first-child { color: var(--violet); font-size: 11px; }
.ag-topbar__model i.fa-chevron-down { font-size: 9px; color: var(--text-faint); }
.ag-topbar__model-pulse {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 6px var(--violet);
  animation: ag-pulse 1.6s ease-in-out infinite;
}

.ag-topbar__model-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  z-index: 110;
  padding: 6px;
}
.ag-topbar__model-menu.is-open { display: block; }
.ag-topbar__model-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
}
.ag-topbar__model-menu a:hover { background: var(--violet-soft); color: var(--text); }
.ag-topbar__model-menu a.is-active { background: var(--violet-soft); color: var(--violet); }

.ag-topbar__spacer { flex: 1; }

.ag-topbar__search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 240px;
  padding: 0 12px;
  height: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text-muted);
  transition: all var(--t-base) var(--ease);
}
.ag-topbar__search:hover { border-color: var(--border-strong); }
.ag-topbar__search:focus-within {
  border-color: var(--violet);
  box-shadow: var(--ring-violet);
}
.ag-topbar__search i { font-size: 12px; color: var(--text-dim); }
.ag-topbar__search input {
  background: transparent;
  border: none;
  outline: none;
  flex: 1;
  color: var(--text);
  font-size: 12px;
  font-family: inherit;
}
.ag-topbar__search input::placeholder { color: var(--text-faint); }
.ag-topbar__search kbd {
  font-family: var(--mono);
  font-size: 9px;
  padding: 2px 5px;
  border-radius: 3px;
  background: var(--surface-3);
  color: var(--text-dim);
}

.ag-topbar__btn {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--r);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--t-fast) var(--ease);
}
.ag-topbar__btn:hover { color: var(--violet); border-color: var(--border-violet); }
.ag-topbar__btn-dot {
  position: absolute;
  top: 7px; right: 7px;
  width: 6px; height: 6px;
  background: var(--magenta);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--magenta);
}

.ag-topbar__user {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}
.ag-topbar__avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--violet-grad);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
}

/* 응답 진행 바 (토피바 하단 1px) */
.ag-topbar__progress {
  position: absolute;
  bottom: -1px; left: 0;
  height: 2px;
  width: 0;
  background: var(--violet-grad);
  transition: width 220ms var(--ease);
  pointer-events: none;
  z-index: 1;
}
.ag-topbar__progress.is-running {
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--violet), var(--magenta), var(--violet), transparent);
  background-size: 200% 100%;
  animation: ag-shimmer 1.4s linear infinite;
}

/* ─── Layout: Sidebar ─── */
.ag-side {
  position: fixed;
  top: var(--topbar-h);
  bottom: 0;
  left: 0;
  width: var(--side-w);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  z-index: 90;
  transition: width var(--t-base) var(--ease);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.ag-side:hover,
.ag-side.is-open { width: var(--side-w-open); }

.ag-side__nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}
.ag-side__nav::-webkit-scrollbar { width: 4px; }

.ag-side__group {
  font-family: var(--en);
  font-size: 9px;
  font-weight: 700;
  color: var(--text-faint);
  letter-spacing: 0.14em;
  padding: 12px 20px 6px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--t-base) var(--ease);
}
.ag-side:hover .ag-side__group,
.ag-side.is-open .ag-side__group { opacity: 1; }

.ag-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 24px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  transition: all var(--t-fast) var(--ease);
}
.ag-nav-item i {
  width: 22px;
  font-size: 14px;
  text-align: center;
  flex-shrink: 0;
}
.ag-nav-item span {
  opacity: 0;
  transition: opacity var(--t-base) var(--ease);
}
.ag-side:hover .ag-nav-item span,
.ag-side.is-open .ag-nav-item span { opacity: 1; }

.ag-nav-item:hover {
  background: var(--surface);
  color: var(--text);
}
.ag-nav-item.is-active {
  background: var(--violet-soft);
  color: var(--violet);
}
.ag-nav-item.is-active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--violet);
  box-shadow: var(--violet-glow);
}
.ag-nav-item.is-active i { color: var(--violet); }

.ag-side__divider {
  height: 1px;
  background: var(--border);
  margin: 8px 16px;
}

.ag-side__bottom {
  padding: 12px 0;
  border-top: 1px solid var(--border);
}

.ag-side-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 89;
}
.ag-side-backdrop.is-open { display: block; }

/* ─── Layout: Main ─── */
.ag-main {
  margin-left: var(--side-w);
  margin-top: var(--topbar-h);
  min-height: calc(100vh - var(--topbar-h));
  padding: var(--content-pad);
  position: relative;
  z-index: 1;
}

/* 사이드바 없는 standalone 페이지 (좌측 마진 제거) */
.ag-main--standalone {
  margin-left: 0;
}

/* 채팅 페이지는 풀 사이즈 (토피바 아래 전체 viewport 점유) */
.ag-main--chat {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0;
  min-height: 0;
  height: auto;
  overflow: hidden;
}
/* 채팅 페이지 body 자체 스크롤 방지 */
body.ag-body--chat { overflow: hidden; height: 100vh; }

/* ─── Page head ─── */
.ag-page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.ag-page-head h1 {
  margin: 0 0 4px;
  font-family: var(--kr);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.ag-page-head h1 i {
  margin-right: 8px;
  font-size: 18px;
}
.ag-page-head__sub {
  margin: 0;
  font-size: 12px;
  color: var(--text-dim);
}
.ag-page-head__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ─── Grids ─── */
.ag-kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.ag-kpi-grid--3 { grid-template-columns: repeat(3, 1fr); }
.ag-kpi-grid--5 { grid-template-columns: repeat(5, 1fr); }

.ag-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.ag-grid-2-1 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 18px;
}

/* ─── Utilities ─── */
.u-mono       { font-family: var(--mono); }
.u-en         { font-family: var(--en); }
.u-tabular    { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

.u-text-violet  { color: var(--violet); }
.u-text-magenta { color: var(--magenta); }
.u-text-pink    { color: var(--pink); }
.u-text-cyan    { color: var(--cyan); }
.u-text-emerald { color: var(--emerald); }
.u-text-amber   { color: var(--amber); }
.u-text-rose    { color: var(--rose); }

.u-text-dim   { color: var(--text-dim); }
.u-text-faint { color: var(--text-faint); }
.u-text-muted { color: var(--text-muted); }

.u-mb-0  { margin-bottom: 0; }
.u-mb-8  { margin-bottom: 8px; }
.u-mb-12 { margin-bottom: 12px; }
.u-mb-16 { margin-bottom: 16px; }
.u-mb-20 { margin-bottom: 20px; }
.u-mt-12 { margin-top: 12px; }
.u-mt-16 { margin-top: 16px; }
.u-mt-20 { margin-top: 20px; }

.u-flex      { display: flex; }
.u-flex-1    { flex: 1; }
.u-gap-6     { gap: 6px; }
.u-gap-8     { gap: 8px; }
.u-gap-12    { gap: 12px; }
.u-items-center    { align-items: center; }
.u-justify-between { justify-content: space-between; }
.u-justify-center  { justify-content: center; }

.u-truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ─── Responsive ─── */
@media (max-width: 1280px) {
  .ag-kpi-grid { grid-template-columns: repeat(3, 1fr); }
  .ag-topbar__search { width: 200px; }
}

@media (max-width: 960px) {
  .ag-grid-2,
  .ag-grid-2-1 { grid-template-columns: 1fr; }
  .ag-topbar__model { display: none; }
}

@media (max-width: 768px) {
  :root {
    --content-pad: 14px;
    --side-w: 0;
  }
  .ag-main { margin-left: 0; }
  .ag-side {
    width: var(--side-w-open);
    transform: translateX(-100%);
    transition: transform var(--t-base) var(--ease);
  }
  .ag-side.is-open { transform: translateX(0); }
  .ag-side .ag-nav-item span,
  .ag-side .ag-side__group { opacity: 1; }

  .ag-kpi-grid,
  .ag-kpi-grid--5 { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .ag-kpi-grid--3 { grid-template-columns: 1fr; }

  .ag-page-head h1 { font-size: 20px; }
  .ag-page-head__actions { width: 100%; }

  .ag-topbar { gap: 10px; padding: 0 12px; }
  .ag-topbar__search { display: none; }
  .ag-topbar__user { padding-left: 0; border-left: none; }
  .ag-topbar__user span { display: none; }
  .ag-topbar__title { font-size: 14px; }
  .ag-topbar__logo { width: 28px; height: 28px; font-size: 13px; }
}

@media (max-width: 480px) {
  .ag-kpi-grid,
  .ag-kpi-grid--5 { grid-template-columns: 1fr; }
  .ag-topbar { gap: 8px; padding: 0 10px; }
  .ag-topbar__badge { display: none; }
  .ag-topbar__btn { width: 34px; height: 34px; }
}