/* === CSS Variables === */
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --bg-input: #1a1a2e;
  --border: #2a2a4a;
  --text-primary: #e0e0e0;
  --text-secondary: #8888aa;
  --text-muted: #666688;
  --accent: #4CAF50;
  --accent-hover: #66BB6A;
  --danger: #ef5350;
  --danger-hover: #f44336;
  --positive: #4CAF50;
  --negative: #ef5350;
  --warning: #FFA726;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* === Typography === */
h1 { font-size: 1.5rem; font-weight: 600; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }
code { font-family: var(--font-mono); font-size: 0.85em; color: var(--text-secondary); }
a { color: var(--accent); text-decoration: none; }
hr { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* === Utility === */
.text-right { text-align: right; }
.positive { color: var(--positive) !important; }
.negative { color: var(--negative) !important; }
.bold { font-weight: 600; }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-full { width: 100%; justify-content: center; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.icon-btn:hover { background: var(--bg-card); color: var(--text-primary); }
.icon-btn.active { color: var(--accent); }
.icon-btn.small { width: 28px; height: 28px; }
.icon-btn.danger:hover { color: var(--danger); }

/* === Forms === */
.form-group { margin-bottom: 1rem; position: relative; }
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font);
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group input::placeholder { color: var(--text-muted); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-actions { display: flex; gap: 0.75rem; justify-content: flex-end; margin-top: 1.5rem; }

.toggle-label {
  display: flex !important;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  text-transform: none !important;
  font-size: 0.95rem !important;
  color: var(--text-primary) !important;
}
.toggle-label input[type="checkbox"] {
  width: 40px;
  height: 22px;
  appearance: none;
  background: var(--border);
  border-radius: 11px;
  position: relative;
  cursor: pointer;
  transition: background 0.3s;
  flex-shrink: 0;
}
.toggle-label input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: transform 0.3s, background 0.3s;
}
.toggle-label input[type="checkbox"]:checked {
  background: var(--accent);
}
.toggle-label input[type="checkbox"]:checked::after {
  transform: translateX(18px);
  background: #fff;
}

.help-text { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.5rem; }
.push-controls { display: flex; gap: 0.5rem; margin-top: 0.5rem; }
.error-message { color: var(--danger); font-size: 0.875rem; padding: 0.5rem 0; }

/* === Search Results === */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-height: 240px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: var(--shadow);
}
.search-item {
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.search-item:last-child { border-bottom: none; }
.search-item:hover { background: var(--bg-secondary); }
.search-item strong { color: var(--accent); }
.search-item small { color: var(--text-muted); font-size: 0.75rem; }

/* === Login Page === */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}
.login-container {
  width: 100%;
  max-width: 380px;
}
.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}
.login-logo img { margin-bottom: 0.75rem; }
.login-logo h1 { color: var(--text-primary); }
.login-subtitle { color: var(--text-secondary); font-size: 0.9rem; }
.login-form {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

/* === App Layout === */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.header-left h1 { font-size: 1.25rem; }
.header-right { display: flex; gap: 0.25rem; }

.app-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

.app-footer {
  text-align: center;
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* === Portfolio Summary === */
.portfolio-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.summary-card {
  background: var(--bg-card);
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.summary-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}
.summary-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* === ETF Section === */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* === ETF Table (Desktop) === */
.etf-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.etf-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.etf-table th {
  background: var(--bg-secondary);
  padding: 0.75rem;
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  font-weight: 600;
  white-space: nowrap;
}
.etf-table td {
  padding: 0.75rem;
  border-top: 1px solid var(--border);
  white-space: nowrap;
  background: var(--bg-card);
}
.etf-table tr:hover td { background: var(--bg-secondary); }
.etf-name { font-weight: 500; }
.etf-sub { font-size: 0.75rem; color: var(--text-muted); }
.actions { display: flex; gap: 0.25rem; }

/* === ETF Cards (Mobile) === */
.etf-cards { display: none; }
.etf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.etf-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}
.etf-card-actions { display: flex; gap: 0.25rem; }
.etf-card-body { padding: 0.5rem 1rem; }
.etf-card-row {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  font-size: 0.9rem;
}
.etf-card-row span:first-child { color: var(--text-secondary); }

/* === Modal === */
.modal[hidden] { display: none !important; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}
.modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0 0.25rem;
  line-height: 1;
}
.modal-close:hover { color: var(--text-primary); }

/* === Responsive === */
@media (max-width: 768px) {
  .etf-table-wrapper { display: none; }
  .etf-cards { display: block; }

  .portfolio-summary {
    grid-template-columns: 1fr;
  }
  .summary-value { font-size: 1.25rem; }

  .form-row { grid-template-columns: 1fr; }

  .app-header {
    padding: 0.5rem 1rem;
  }
  .header-left h1 { font-size: 1.1rem; }

  .app-main { padding: 1rem; }

  .section-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* === Animations === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.modal-content { animation: fadeIn 0.2s ease-out; }