/* ============================================
   FL Design System — International Family Office
   Shared across: Chat, Docs, Portfolio, RWA, Tax, Analysis
   ============================================ */

:root {
  /* Core palette — deep ink + gold accent */
  --fl-bg:       #0b0f14;
  --fl-surface:  #111820;
  --fl-surface2: #161d27;
  --fl-surface3: #1c2533;
  --fl-border:   #1c2533;
  --fl-border2:  #2a3545;

  /* Text hierarchy */
  --fl-text:     #c9d1d9;
  --fl-text2:    #8b949e;
  --fl-text3:    #484f58;

  /* Brand — gold */
  --fl-gold:     #c9a96e;
  --fl-gold2:    #a68b5b;
  --fl-gold3:    rgba(201,169,110,0.08);
  --fl-gold4:    rgba(201,169,110,0.15);

  /* Semantic */
  --fl-ok:       #3fb950;
  --fl-warn:     #d29922;
  --fl-err:      #f85149;
  --fl-info:     #58a6ff;

  /* Typography */
  --fl-font:     'SF Pro Display', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans TC', sans-serif;
  --fl-mono:     'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --fl-gap:      8px;
  --fl-radius:   6px;
  --fl-radius2:  10px;
}

/* ============================================
   FL Nav — Unified top navigation
   ============================================ */
.fl-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 48px;
  background: var(--fl-surface);
  border-bottom: 1px solid var(--fl-border);
  position: sticky;
  top: 0;
  z-index: 100;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.fl-nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.fl-nav-logo {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fl-gold);
  border: 1px solid var(--fl-gold2);
  padding: 2px 6px;
  border-radius: 3px;
  line-height: 1.4;
}

.fl-nav-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--fl-text);
  letter-spacing: -0.2px;
}

.fl-nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Language toggle */
.fl-lang {
  display: flex;
  background: var(--fl-surface2);
  border: 1px solid var(--fl-border);
  border-radius: 4px;
  overflow: hidden;
  font-size: 11px;
}

.fl-lang-btn {
  padding: 4px 10px;
  cursor: pointer;
  color: var(--fl-text3);
  background: transparent;
  border: none;
  font-family: var(--fl-font);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: all 0.15s;
  touch-action: manipulation;
}

.fl-lang-btn.active {
  color: var(--fl-gold);
  background: var(--fl-gold3);
}

.fl-nav-link {
  font-size: 11px;
  color: var(--fl-text3);
  text-decoration: none;
  letter-spacing: 0.3px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color 0.15s;
  touch-action: manipulation;
}

.fl-nav-link:hover {
  color: var(--fl-text2);
}

/* ============================================
   FL Section titles — clean, minimal
   ============================================ */
.fl-section {
  padding: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.fl-section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--fl-text3);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--fl-border);
}

/* ============================================
   FL Cards — quiet, professional
   ============================================ */
.fl-card {
  background: var(--fl-surface);
  border: 1px solid var(--fl-border);
  border-radius: var(--fl-radius2);
  padding: 16px;
  margin-bottom: var(--fl-gap);
  transition: border-color 0.15s;
}

.fl-card:hover {
  border-color: var(--fl-border2);
}

.fl-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--fl-text);
  margin-bottom: 6px;
}

.fl-card-desc {
  font-size: 12px;
  color: var(--fl-text2);
  line-height: 1.5;
}

/* ============================================
   FL Buttons — understated
   ============================================ */
.fl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--fl-radius);
  font-size: 12px;
  font-weight: 500;
  font-family: var(--fl-font);
  cursor: pointer;
  border: none;
  touch-action: manipulation;
  transition: all 0.15s;
  letter-spacing: 0.2px;
}

.fl-btn-primary {
  background: var(--fl-gold);
  color: #0b0f14;
}

.fl-btn-primary:hover {
  background: var(--fl-gold2);
}

.fl-btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.fl-btn-ghost {
  background: transparent;
  color: var(--fl-text2);
  border: 1px solid var(--fl-border);
}

.fl-btn-ghost:hover {
  border-color: var(--fl-border2);
  color: var(--fl-text);
}

/* ============================================
   FL Inputs — clean, dark
   ============================================ */
.fl-input,
.fl-select,
.fl-textarea {
  width: 100%;
  background: var(--fl-bg);
  color: var(--fl-text);
  border: 1px solid var(--fl-border);
  border-radius: var(--fl-radius);
  padding: 8px 12px;
  font-size: 13px;
  font-family: var(--fl-font);
  transition: border-color 0.15s;
}

.fl-input:focus,
.fl-select:focus,
.fl-textarea:focus {
  outline: none;
  border-color: var(--fl-gold2);
}

.fl-textarea {
  min-height: 80px;
  resize: vertical;
}

.fl-label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--fl-text3);
  margin-bottom: 4px;
  letter-spacing: 0.3px;
}

/* ============================================
   FL Badges — minimal
   ============================================ */
.fl-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: 0.3px;
}

.fl-badge-gold {
  background: var(--fl-gold3);
  color: var(--fl-gold);
  border: 1px solid var(--fl-gold4);
}

.fl-badge-ok {
  background: rgba(63,185,80,0.08);
  color: var(--fl-ok);
  border: 1px solid rgba(63,185,80,0.2);
}

.fl-badge-warn {
  background: rgba(210,153,34,0.08);
  color: var(--fl-warn);
  border: 1px solid rgba(210,153,34,0.2);
}

.fl-badge-err {
  background: rgba(248,81,73,0.08);
  color: var(--fl-err);
  border: 1px solid rgba(248,81,73,0.2);
}

/* ============================================
   FL Stats — data-forward
   ============================================ */
.fl-stats {
  display: flex;
  gap: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--fl-border);
  border-bottom: 1px solid var(--fl-border);
}

.fl-stat {
  text-align: center;
}

.fl-stat-num {
  font-size: 22px;
  font-weight: 300;
  color: var(--fl-gold);
  letter-spacing: -0.5px;
}

.fl-stat-label {
  font-size: 10px;
  color: var(--fl-text3);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ============================================
   FL Responsive
   ============================================ */
@media (max-width: 480px) {
  .fl-nav { padding: 0 12px; }
  .fl-section { padding: 12px; }
  .fl-stats { gap: 16px; }
  .fl-stat-num { font-size: 18px; }
  .fl-nav-title { font-size: 12px; }
}


/* ============================================
   FL Corner Logo + Gold Lines — 私人銀行信箋風格
   ============================================ */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100px;
    height: 100px;
    background: url("/img/fl-logo-transparent.png") no-repeat center/contain;
    z-index: 0;
    pointer-events: none;
    opacity: 0.7;
}

body::after {
    content: '';
    position: fixed;
    top: 100px;
    left: 50px;
    width: 1px;
    height: calc(100vh - 140px);
    background: linear-gradient(180deg, rgba(201,169,110,0.3), rgba(201,169,110,0.05) 50%, transparent);
    z-index: 0;
    pointer-events: none;
}

.fl-gold-h-line {
    position: fixed;
    top: 50px;
    left: 100px;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(201,169,110,0.3), rgba(201,169,110,0.05) 40%, transparent 80%);
    z-index: 0;
    pointer-events: none;
}