:root {
  --bg-canvas: #000000;
  --surface-primary: rgba(28, 28, 30, 0.85);
  --surface-card: #141416;
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --text-primary: #FFFFFF;
  --text-secondary: #8E8E93;
  --text-muted: #636366;
  --system-blue: #0A84FF;
  --system-green: #30D158;
  --system-red: #FF453A;
  --system-purple: #BF5AF2;
  --dock-bg: rgba(28, 28, 30, 0.92);
  --dock-btn-active: rgba(255, 255, 255, 0.12);
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;

  /* Briefing Box - Dark Mode */
  --briefing-bg: linear-gradient(135deg, rgba(88, 86, 214, 0.24) 0%, rgba(10, 132, 255, 0.16) 50%, rgba(20, 20, 24, 0.85) 100%);
  --briefing-border: rgba(191, 90, 242, 0.35);
  --briefing-shadow: 0 8px 32px rgba(88, 86, 214, 0.18);
  --briefing-text: #F4F4F5;
}

/* Light Mode Styling */
[data-theme="light"] {
  --bg-canvas: #F2F2F7;
  --surface-primary: rgba(255, 255, 255, 0.88);
  --surface-card: #FFFFFF;
  --border-glass: rgba(60, 60, 67, 0.15);
  --border-subtle: rgba(60, 60, 67, 0.08);
  --text-primary: #000000;
  --text-secondary: #6C6C70;
  --text-muted: #8E8E93;
  --system-blue: #007AFF;
  --system-green: #34C759;
  --system-red: #FF3B30;
  --system-purple: #8944AB;
  --dock-bg: rgba(255, 255, 255, 0.92);
  --dock-btn-active: rgba(0, 0, 0, 0.08);

  /* Briefing Box - Light Mode (Frosted iOS Accent) */
  --briefing-bg: linear-gradient(135deg, rgba(235, 235, 245, 0.9) 0%, rgba(224, 237, 255, 0.85) 100%);
  --briefing-border: rgba(0, 122, 255, 0.22);
  --briefing-shadow: 0 4px 20px rgba(0, 122, 255, 0.08);
  --briefing-text: #1C1C1E;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: var(--font-stack); -webkit-font-smoothing: antialiased; }

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
}

#app {
  width: 100%;
  max-width: 480px;
  min-height: 100vh;
  padding: 24px 16px 115px 16px;
  position: relative;
}

.app-header { margin-bottom: 20px; }
.greeting-time { font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.greeting-title { font-size: 32px; font-weight: 700; letter-spacing: -0.6px; margin-top: 2px; }

/* Refined Intelligence Briefing Box */
.briefing-box {
  background: var(--briefing-bg);
  border: 1px solid var(--briefing-border);
  box-shadow: var(--briefing-shadow);
  border-radius: 20px;
  padding: 16px 18px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  transition: all 0.25s ease;
}

.briefing-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.briefing-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; text-transform: uppercase; font-weight: 700; letter-spacing: 0.6px; color: var(--system-purple); }
.briefing-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--system-green); box-shadow: 0 0 8px var(--system-green); }
.briefing-date { font-size: 11px; color: var(--text-secondary); font-weight: 500; }
.briefing-content { font-size: 13.5px; line-height: 1.5; color: var(--briefing-text); font-weight: 450; }

/* Glass Cards */
.glass-card {
  background: var(--surface-primary);
  backdrop-filter: blur(35px) saturate(190%);
  -webkit-backdrop-filter: blur(35px) saturate(190%);
  border: 0.5px solid var(--border-glass);
  border-radius: 20px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.card-title {
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.6px;
  color: var(--text-secondary);
}

.card-value {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 6px 0 8px 0;
}

/* 3-Column Portfolio Movement Grid */
.movement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 10px;
}
.movement-cell {
  background: rgba(142, 142, 147, 0.08);
  border: 0.5px solid var(--border-subtle);
  border-radius: 14px;
  padding: 12px 10px;
  text-align: center;
  position: relative;
}
.cell-name { font-size: 11px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; margin-bottom: 4px; }
.cell-pill { font-size: 15px; font-weight: 700; letter-spacing: -0.3px; margin-bottom: 3px; }
.cell-date { font-size: 10px; color: var(--text-muted); }
.color-up { color: var(--system-green); }
.color-down { color: var(--system-red); }

/* Ledger Items */
.ledger-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 0.5px solid var(--border-subtle);
}
.ledger-row:last-child { border-bottom: none; }

.symbol-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-left: 6px;
}
.badge-bought { background: rgba(10, 132, 255, 0.18); color: var(--system-blue); }
.badge-profit { background: rgba(48, 209, 88, 0.18); color: var(--system-green); }
.badge-loss { background: rgba(255, 69, 58, 0.18); color: var(--system-red); }

/* Theme Segmented Switcher */
.theme-switch-container {
  display: flex;
  background: rgba(142, 142, 147, 0.14);
  border-radius: 12px;
  padding: 3px;
  margin-top: 10px;
}
.theme-btn {
  flex: 1;
  padding: 8px 0;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.theme-btn.active {
  background: var(--surface-card);
  color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

/* Form Controls */
.input-label { display: block; font-size: 11px; text-transform: uppercase; font-weight: 600; color: var(--text-secondary); margin: 10px 0 4px 0; }
.field-input {
  width: 100%; padding: 12px 14px; background: var(--surface-card);
  border: 0.5px solid var(--border-glass); border-radius: 12px; color: var(--text-primary); font-size: 14px; outline: none;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.calc-preview {
  background: rgba(10, 132, 255, 0.08); border: 0.5px dashed rgba(10, 132, 255, 0.35);
  border-radius: 10px; padding: 10px 14px; margin-top: 10px; font-size: 13px; color: var(--system-blue);
  font-weight: 600; display: flex; justify-content: space-between;
}

.action-btn {
  width: 100%; padding: 14px; border-radius: 12px; background: var(--system-blue);
  color: #fff; border: none; font-size: 15px; font-weight: 600; cursor: pointer; margin-top: 14px;
}
.action-btn:active { transform: scale(0.98); }

/* Floating Bottom Dock */
.floating-dock {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  width: min(calc(100% - 24px), 430px); height: 62px; background: var(--dock-bg);
  backdrop-filter: blur(35px) saturate(190%); -webkit-backdrop-filter: blur(35px) saturate(190%);
  border: 0.5px solid var(--border-glass); border-radius: 34px; display: flex;
  justify-content: space-around; align-items: center; z-index: 100; box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.dock-btn {
  background: none; border: none; color: var(--text-secondary); font-size: 11px;
  font-weight: 500; cursor: pointer; padding: 8px 12px; border-radius: 20px; transition: all 0.2s ease;
}
.dock-btn.active { color: var(--text-primary); background: var(--dock-btn-active); font-weight: 600; }