/* ============================================================================
   TOKENS
============================================================================ */
:root {
  --bg-void: #0A0B0E;
  --bg-panel: #121317;
  --bg-elevated: #191B20;
  --bg-hover: #20232B;
  --border: #262932;
  --border-soft: rgba(255,255,255,0.06);

  --text-primary: #EDEEF0;
  --text-secondary: #8A8F98;
  --text-tertiary: #565B66;

  --accent-blue: #3D7FFF;
  --accent-blue-dim: rgba(61,127,255,0.14);
  --buy-green: #16C784;
  --buy-green-dim: rgba(22,199,132,0.14);
  --sell-red: #EA3943;
  --sell-red-dim: rgba(234,57,67,0.14);
  --gold: #F0B90B;

  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-ui);
  height: 100%;
  -webkit-font-smoothing: antialiased;
}
button, input { font-family: inherit; }
a { color: var(--accent-blue); text-decoration: none; }
.hidden { display: none !important; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }

/* ============================================================================
   SHARED PRIMITIVES
============================================================================ */
.text-input {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  transition: border-color .15s ease;
}
.text-input:focus { border-color: var(--accent-blue); }
.text-input::placeholder { color: var(--text-tertiary); }

.field-label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin: 14px 0 6px;
  font-weight: 500;
}

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s ease;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-primary:disabled { opacity: .6; cursor: default; }

.btn-secondary {
  display: block;
  text-align: center;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn-secondary:hover { border-color: var(--accent-blue); color: var(--accent-blue); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--text-secondary); }

.full-width { width: 100%; margin-top: 14px; }

.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 15px;
}
.icon-btn:hover { color: var(--text-primary); border-color: var(--text-secondary); }

.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent-blue), #1E3A66);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}
.brand-mark.small { width: 28px; height: 28px; font-size: 12px; }
.brand-name { font-weight: 700; font-size: 16px; margin-left: 10px; letter-spacing: .2px; }

.section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-tertiary);
  font-weight: 600;
  margin-bottom: 10px;
}

/* ============================================================================
   LOGIN SCREEN
============================================================================ */
#login-screen.screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 15%, rgba(61,127,255,0.08), transparent 45%),
    radial-gradient(circle at 80% 85%, rgba(22,199,132,0.06), transparent 45%),
    var(--bg-void);
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.login-brand { display: flex; align-items: center; margin-bottom: 8px; }
.login-tagline { color: var(--text-secondary); font-size: 13.5px; margin: 0 0 22px; }
.login-error { color: var(--sell-red); font-size: 13px; margin-top: 10px; min-height: 16px; }
.purchase-wrap { margin-top: 4px; }

/* ============================================================================
   TOPBAR
============================================================================ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  gap: 12px;
  flex-wrap: wrap;
}
.topbar-left { display: flex; align-items: center; }
.topbar-center { display: flex; justify-content: center; }
.topbar-right { display: flex; align-items: center; gap: 10px; }

.tf-group {
  display: flex;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}
.tf-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 7px 16px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.tf-btn.active { background: var(--accent-blue); color: #fff; }

.status-pill {
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 20px;
  font-family: var(--font-mono);
}
.status-loading { color: var(--gold); background: rgba(240,185,11,0.12); }
.status-live { color: var(--buy-green); background: var(--buy-green-dim); }
.status-error { color: var(--sell-red); background: var(--sell-red-dim); }

.user-email { color: var(--text-secondary); font-size: 13px; max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.error-banner {
  background: var(--sell-red-dim);
  color: var(--sell-red);
  font-size: 13px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
}

/* ============================================================================
   LAYOUT
============================================================================ */
.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 58px);
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  max-height: calc(100vh - 58px);
  background: var(--bg-panel);
}
.search-input { margin-bottom: 18px; }

.sidebar-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-tertiary);
  font-weight: 600;
  margin: 16px 0 8px;
}
.sidebar-section-title:first-of-type { margin-top: 0; }

.empty-hint { color: var(--text-tertiary); font-size: 12.5px; padding: 6px 2px; }

.group-header {
  font-size: 10.5px;
  color: var(--text-tertiary);
  font-weight: 600;
  margin: 12px 2px 4px;
  letter-spacing: .06em;
}

.pair-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}
.pair-row:hover { background: var(--bg-hover); color: var(--text-primary); }
.pair-row.active { background: var(--accent-blue-dim); color: var(--accent-blue); }

.star-btn {
  background: transparent;
  border: none;
  color: var(--border);
  cursor: pointer;
  font-size: 14px;
  padding: 0 0 0 8px;
}
.star-btn.starred { color: var(--gold); }

/* ============================================================================
   MAIN AREA
============================================================================ */
.main-area {
  padding: 20px;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 20px;
  align-items: start;
}

.chart-panel, .signal-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.chart-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}
.chart-symbol { font-family: var(--font-mono); font-weight: 700; font-size: 18px; }
.chart-price { font-family: var(--font-mono); font-size: 18px; color: var(--text-secondary); }

.chart-container { height: 460px; width: 100%; }

/* --- Signal panel --- */
.signal-top {
  display: flex;
  gap: 20px;
  align-items: center;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.confidence-ring-wrap { position: relative; width: 108px; height: 108px; flex-shrink: 0; }
.confidence-ring { width: 100%; height: 100%; }
.ring-track { fill: none; stroke: var(--border); stroke-width: 8; }
.ring-fill {
  fill: none;
  stroke: var(--accent-blue);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset .6s ease, stroke .3s ease;
}
.confidence-center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.confidence-value { font-family: var(--font-mono); font-size: 22px; font-weight: 700; }
.confidence-label { font-size: 10px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: .06em; }

.signal-summary { flex: 1; min-width: 200px; }
.signal-badge {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 20px;
}
.signal-badge.buy-strong { color: #fff; background: var(--buy-green); }
.signal-badge.buy { color: var(--buy-green); background: var(--buy-green-dim); }
.signal-badge.neutral { color: var(--text-secondary); background: var(--bg-elevated); }
.signal-badge.sell { color: var(--sell-red); background: var(--sell-red-dim); }
.signal-badge.sell-strong { color: #fff; background: var(--sell-red); }

.locked-since { display: block; font-size: 11.5px; color: var(--text-tertiary); margin: 8px 0 14px; }

.levels-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 16px;
}
.level-item { display: flex; flex-direction: column; }
.level-label { font-size: 10.5px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: .05em; }
.level-value { font-family: var(--font-mono); font-size: 14.5px; font-weight: 600; margin-top: 2px; }
.level-value.sl { color: var(--sell-red); }
.level-value.tp { color: var(--buy-green); }

.score-breakdown { margin-bottom: 18px; }
.score-row {
  display: grid;
  grid-template-columns: 108px 1fr 52px;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.score-label { font-size: 12px; color: var(--text-secondary); }
.score-track { height: 6px; background: var(--bg-elevated); border-radius: 4px; overflow: hidden; }
.score-fill { height: 100%; border-radius: 4px; transition: width .5s ease; }
.score-fill.positive { background: var(--buy-green); }
.score-fill.negative { background: var(--sell-red); }
.score-value { font-family: var(--font-mono); font-size: 12px; text-align: right; color: var(--text-secondary); }

.indicators-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 18px;
  padding: 14px;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
}
.ind-item { display: flex; flex-direction: column; }
.ind-label { font-size: 10px; color: var(--text-tertiary); text-transform: uppercase; }
.ind-value { font-family: var(--font-mono); font-size: 13px; margin-top: 2px; }

.reason-panel { }
.reason-text { font-size: 13px; line-height: 1.6; color: var(--text-secondary); margin: 0; }

/* ============================================================================
   SETTINGS MODAL
============================================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-card {
  width: 100%; max-width: 420px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
}
.modal-card h3 { margin: 0 0 10px; font-size: 17px; }
.modal-copy { color: var(--text-secondary); font-size: 13px; line-height: 1.6; margin: 0; }
.modal-actions { margin-top: 6px; }

/* ============================================================================
   RESPONSIVE
============================================================================ */
@media (max-width: 1100px) {
  .main-area { grid-template-columns: 1fr; }
  .chart-container { height: 380px; }
}

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .topbar { flex-direction: row; }
  .topbar-center { order: 3; width: 100%; justify-content: flex-start; margin-top: 8px; }
}

@media (max-width: 560px) {
  .topbar { padding: 10px 14px; }
  .brand-name { font-size: 14px; }
  .user-email { display: none; }
  .main-area { padding: 12px; gap: 12px; }
  .chart-panel, .signal-panel { padding: 14px; }
  .indicators-grid { grid-template-columns: repeat(2, 1fr); }
  .levels-grid { grid-template-columns: repeat(2, 1fr); }
  .score-row { grid-template-columns: 90px 1fr 44px; }
  .chart-container { height: 300px; }
  .confidence-ring-wrap { width: 88px; height: 88px; }
  .signal-top { gap: 14px; }
  .login-card { padding: 24px; }
}