:root {
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
  --max-width: 390px;
  --tab-height: 80px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

/* ===== THEME: NEON (default) ===== */
[data-theme="neon"], :root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #16161f;
  --border: #1a1a2e;
  --border-accent: rgba(0, 245, 160, 0.3);
  --text: #ffffff;
  --text-secondary: #4a4a5a;
  --text-muted: #3a3a4a;
  --accent: #00f5a0;
  --accent-secondary: #00d9f5;
  --accent-gradient: linear-gradient(90deg, #00f5a0, #00d9f5);
  --positive: #00f5a0;
  --negative: #ff4757;
  --chart-1: #00f5a0;
  --chart-2: #f5576c;
  --chart-3: #feca57;
  --chart-4: #00d9f5;
  --card-glow: 0 0 20px rgba(0, 245, 160, 0.05);
  --card-top-line: linear-gradient(90deg, transparent, var(--accent), transparent);
  --tab-bg: rgba(10, 10, 15, 0.95);
  --ring-shadow: 0 0 30px rgba(0, 245, 160, 0.2);
}

/* ===== THEME: GLASSMORPHISM ===== */
[data-theme="glass"] {
  --bg: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  --bg-card: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(255, 255, 255, 0.12);
  --border: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(102, 126, 234, 0.4);
  --text: #ffffff;
  --text-secondary: rgba(255,255,255,0.6);
  --text-muted: rgba(255,255,255,0.3);
  --accent: #667eea;
  --accent-secondary: #764ba2;
  --accent-gradient: linear-gradient(90deg, #667eea, #764ba2);
  --positive: #34C759;
  --negative: #ff6b6b;
  --chart-1: #667eea;
  --chart-2: #f093fb;
  --chart-3: #feca57;
  --chart-4: #4facfe;
  --card-glow: none;
  --card-top-line: none;
  --tab-bg: rgba(15, 12, 41, 0.9);
  --ring-shadow: 0 0 30px rgba(102, 126, 234, 0.2);
}

/* ===== THEME: AURORA ===== */
[data-theme="aurora"] {
  --bg: #fafbff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f9fe;
  --border: rgba(0, 0, 0, 0.06);
  --border-accent: rgba(102, 126, 234, 0.3);
  --text: #1a1a2e;
  --text-secondary: #8b8b9e;
  --text-muted: #c0c0cc;
  --accent: #667eea;
  --accent-secondary: #f093fb;
  --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  --positive: #34C759;
  --negative: #ff3b30;
  --chart-1: #667eea;
  --chart-2: #f093fb;
  --chart-3: #feca57;
  --chart-4: #4facfe;
  --card-glow: 0 2px 16px rgba(0,0,0,0.04);
  --card-top-line: none;
  --tab-bg: rgba(250, 251, 255, 0.92);
  --ring-shadow: 0 8px 30px rgba(102, 126, 234, 0.2);
}

/* ===== THEME: MIDNIGHT ===== */
[data-theme="midnight"] {
  --bg: #08080f;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(99, 102, 241, 0.3);
  --text: #f0f0f5;
  --text-secondary: #555568;
  --text-muted: #3a3a4a;
  --accent: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  --positive: #34d399;
  --negative: #f87171;
  --chart-1: #6366f1;
  --chart-2: #a78bfa;
  --chart-3: #fbbf24;
  --chart-4: #22d3ee;
  --card-glow: 0 4px 24px rgba(99, 102, 241, 0.08);
  --card-top-line: linear-gradient(90deg, transparent, #6366f1, transparent);
  --tab-bg: rgba(8, 8, 15, 0.95);
  --ring-shadow: 0 0 30px rgba(99, 102, 241, 0.15);
}

/* ===== THEME: DEEP SPACE ===== */
[data-theme="space"] {
  --bg: linear-gradient(180deg, #0d0d1a 0%, #1a0d2e 100%);
  --bg-card: rgba(255,255,255,0.02);
  --bg-card-hover: rgba(255,255,255,0.05);
  --border: rgba(255,255,255,0.06);
  --border-accent: rgba(99, 102, 241, 0.3);
  --text: #ffffff;
  --text-secondary: #7c7c8a;
  --text-muted: #4a4a5a;
  --accent: #6366f1;
  --accent-secondary: #c084fc;
  --accent-gradient: linear-gradient(135deg, #6366f1, #c084fc);
  --positive: #10b981;
  --negative: #f87171;
  --chart-1: #6366f1;
  --chart-2: #c084fc;
  --chart-3: #fbbf24;
  --chart-4: #34d399;
  --card-glow: none;
  --card-top-line: none;
  --tab-bg: rgba(13, 13, 26, 0.95);
  --ring-shadow: 0 0 30px rgba(99, 102, 241, 0.2);
}

/* ===== THEME: CARBON ===== */
[data-theme="carbon"] {
  --bg: #111111;
  --bg-card: #1d1d1f;
  --bg-card-hover: #252527;
  --border: #2a2a2c;
  --border-accent: rgba(10, 132, 255, 0.3);
  --text: #f5f5f7;
  --text-secondary: #86868b;
  --text-muted: #48484a;
  --accent: #0a84ff;
  --accent-secondary: #bf5af2;
  --accent-gradient: linear-gradient(135deg, #0a84ff, #bf5af2);
  --positive: #30d158;
  --negative: #ff453a;
  --chart-1: #0a84ff;
  --chart-2: #bf5af2;
  --chart-3: #ffd60a;
  --chart-4: #64d2ff;
  --card-glow: none;
  --card-top-line: none;
  --tab-bg: #111111;
  --ring-shadow: none;
}

/* ===== BASE STYLES ===== */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-container {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px;
  padding-top: calc(20px + var(--safe-top));
  padding-bottom: calc(20px + var(--tab-height));
}

.page { display: none; animation: fadeIn 0.25s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: var(--card-glow);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.card-accent::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--card-top-line);
}
.card-title { font-size: 14px; font-weight: 600; color: var(--text-secondary); margin-bottom: 12px; }

/* ===== HEADER ===== */
.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 26px; font-weight: 700; }
.page-header p { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }
.page-header .accent-text { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ===== TOTAL VALUE ===== */
.total-label { font-size: 12px; color: var(--accent); text-transform: uppercase; letter-spacing: 1.2px; font-weight: 600; }
.total-value { font-size: 38px; font-weight: 800; letter-spacing: -1.5px; margin: 6px 0; }
.return-badge {
  display: inline-block;
  background: rgba(0, 245, 160, 0.1);
  color: var(--positive);
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid rgba(0, 245, 160, 0.15);
}
[data-theme="aurora"] .return-badge { background: rgba(52, 199, 89, 0.1); border-color: rgba(52,199,89,0.2); }

/* ===== SPARKLINE ===== */
.sparkline { display: flex; align-items: flex-end; gap: 3px; height: 45px; margin-top: 16px; }
.sparkline .bar {
  flex: 1;
  border-radius: 3px 3px 0 0;
  min-height: 4px;
  background: linear-gradient(180deg, var(--accent), rgba(0,0,0,0));
  opacity: 0.8;
}

/* ===== OWNERSHIP RING ===== */
.ring-container { display: flex; flex-direction: column; align-items: center; padding: 16px 0; }
.ring {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: conic-gradient(var(--chart-1) 0% 57.5%, var(--chart-2) 57.5% 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--ring-shadow);
}
.ring-inner {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
.ring-inner .val { font-size: 20px; font-weight: 700; }
.ring-inner .lbl { font-size: 11px; color: var(--text-secondary); }
.legend { display: flex; justify-content: center; gap: 20px; font-size: 13px; color: var(--text-secondary); margin-top: 14px; }
.legend-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px; }

/* ===== INVESTOR ROWS ===== */
.investor-row {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.2s;
}
.investor-row:active { border-color: var(--border-accent); }
.inv-left { display: flex; align-items: center; gap: 12px; }
.inv-avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
  background: var(--accent-gradient);
}
.inv-avatar-2 { background: linear-gradient(135deg, var(--chart-2), #ff6b6b); }
.inv-name { font-weight: 600; font-size: 15px; }
.inv-sub { font-size: 12px; color: var(--text-secondary); margin-top: 1px; }
.inv-val { font-size: 18px; font-weight: 700; text-align: right; }
.inv-pl { font-size: 12px; color: var(--positive); text-align: right; }
.inv-pl-neg { color: var(--negative); }

/* ===== TAB BAR ===== */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--max-width);
  background: var(--tab-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  display: flex;
  padding: 10px 0 calc(12px + var(--safe-bottom));
  z-index: 100;
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 10px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s;
}
.tab-item.active { color: var(--accent); }
.tab-item .tab-icon { font-size: 22px; line-height: 1; }
.tab-item .tab-badge {
  position: absolute;
  top: -2px;
  right: 50%;
  margin-right: -14px;
  width: 7px;
  height: 7px;
  background: var(--negative);
  border-radius: 50%;
}

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 6px; }
.form-input {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}
.form-input:focus { border-color: var(--accent); }
.form-input-green { border-color: var(--positive); background: rgba(0,245,160,0.03); }
.form-input-green:focus { border-color: var(--positive); }

/* ===== BUTTONS ===== */
.btn {
  display: block;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.98); opacity: 0.8; }
.btn-primary { background: var(--accent); color: #000; }
.btn-secondary { background: var(--bg-card); border: 1px solid var(--border); color: var(--text); }

[data-theme="aurora"] .btn-primary { background: var(--accent-gradient); color: #fff; }

/* ===== THEME PICKER ===== */
.theme-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; }
.theme-option {
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s;
  font-size: 12px;
  font-weight: 500;
}
.theme-option:active { transform: scale(0.95); }
.theme-option.selected { border-color: var(--accent); }
.theme-option .theme-preview {
  width: 100%;
  height: 32px;
  border-radius: 6px;
  margin-bottom: 6px;
}

/* ===== UTILITIES ===== */
.text-positive { color: var(--positive); }
.text-negative { color: var(--negative); }
.text-accent { color: var(--accent); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-12 { margin-bottom: 12px; }

/* ===== OFFLINE INDICATOR ===== */
.offline-bar {
  position: fixed;
  top: var(--safe-top);
  left: 0; right: 0;
  text-align: center;
  padding: 3px;
  font-size: 11px;
  font-weight: 600;
  background: var(--negative);
  color: #fff;
  z-index: 300;
  display: none;
}
.offline-bar.visible { display: block; }
</style>