/* ===== Design Tokens ===== */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d2e;
  --bg-card: rgba(26, 29, 46, 0.7);
  --bg-card-hover: rgba(35, 39, 60, 0.8);
  --bg-input: rgba(15, 17, 23, 0.6);
  --border-card: rgba(255, 255, 255, 0.06);
  --border-input: rgba(255, 255, 255, 0.1);

  --text-primary: #e8eaed;
  --text-secondary: #9aa0a6;
  --text-muted: #5f6368;

  --accent-blue: #4d8cff;
  --accent-green: #34d399;
  --accent-red: #f87171;
  --accent-purple: #a78bfa;
  --accent-orange: #fb923c;
  --accent-cyan: #22d3ee;

  --gradient-blue: linear-gradient(135deg, #4d8cff 0%, #6c5ce7 100%);
  --gradient-green: linear-gradient(135deg, #34d399 0%, #06b6d4 100%);
  --gradient-red: linear-gradient(135deg, #f87171 0%, #fb923c 100%);
  --gradient-purple: linear-gradient(135deg, #a78bfa 0%, #ec4899 100%);
  --gradient-orange: linear-gradient(135deg, #fb923c 0%, #f59e0b 100%);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);

  --font-main: 'Inter', 'Apple SD Gothic Neo', -apple-system, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background gradient blobs */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  z-index: -1;
  pointer-events: none;
}
body::before {
  width: 500px; height: 500px;
  background: var(--accent-blue);
  top: -100px; right: -100px;
}
body::after {
  width: 400px; height: 400px;
  background: var(--accent-purple);
  bottom: -50px; left: -50px;
}

/* ===== Layout ===== */
.app-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.app-header {
  text-align: center;
  margin-bottom: 32px;
}
.app-header h1 {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, #4d8cff, #a78bfa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
.app-header p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 6px;
}

/* ===== Tab Navigation ===== */
.tab-nav {
  display: flex;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 4px;
  margin-bottom: 28px;
  backdrop-filter: blur(20px);
}
.tab-btn {
  flex: 1;
  padding: 12px 8px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}
.tab-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.04); }
.tab-btn.active {
  background: var(--gradient-blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(77,140,255,0.3);
}

.tab-content { display: none; animation: fadeIn 0.35s ease; }
.tab-content.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 24px;
  backdrop-filter: blur(20px);
  transition: var(--transition);
}
.card:hover {
  border-color: rgba(255,255,255,0.1);
  box-shadow: var(--shadow-md);
}
.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-title .icon {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
}

/* ===== Summary Cards Grid ===== */
.total-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}
.summary-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.summary-card.principal::before { background: var(--gradient-blue); }
.summary-card.evaluation::before { background: var(--gradient-green); }
.summary-card.profit::before { background: var(--gradient-purple); }

.summary-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.summary-value {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.summary-sub {
  font-size: 13px;
  margin-top: 6px;
  font-weight: 600;
}
.positive { color: var(--accent-green); }
.negative { color: var(--accent-red); }

/* ===== Account Cards Grid ===== */
.account-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.account-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 18px;
  backdrop-filter: blur(20px);
  transition: var(--transition);
  cursor: default;
}
.account-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255,255,255,0.1);
}
.account-name {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.account-name .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.dot-direct { background: var(--accent-blue); }
.dot-isa { background: var(--accent-green); }
.dot-pension { background: var(--accent-purple); }
.dot-irp { background: var(--accent-orange); }
.dot-retirement { background: var(--accent-cyan); }

.account-eval {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}
.account-principal {
  font-size: 12px;
  color: var(--text-secondary);
}
.account-roi {
  font-size: 13px;
  font-weight: 600;
  margin-top: 8px;
}

/* ===== Chart Container ===== */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 24px;
  backdrop-filter: blur(20px);
}
.chart-wrapper {
  position: relative;
  height: 300px;
  margin-top: 12px;
}

/* ===== Form (Tab 2) ===== */
.form-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.form-header label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}
.form-header select,
.form-header input[type="month"] {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 8px 12px;
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}
.form-header select:focus,
.form-header input[type="month"]:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(77,140,255,0.15);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.form-account-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(20px);
}
.form-account-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.form-group { margin-bottom: 0; }
.form-group label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-group input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 10px 12px;
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}
.form-group input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(77,140,255,0.15);
}
.form-group input::placeholder { color: var(--text-muted); }

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}
.btn {
  flex: 1;
  padding: 13px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary {
  background: var(--gradient-blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(77,140,255,0.25);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(77,140,255,0.35);
}
.btn-danger {
  background: rgba(248,113,113,0.15);
  color: var(--accent-red);
  border: 1px solid rgba(248,113,113,0.2);
}
.btn-danger:hover { background: rgba(248,113,113,0.25); }

/* ===== Detail Tab (Tab 3) ===== */
.detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.detail-header select {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 8px 14px;
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
}

.detail-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}
.data-table th, .data-table td {
  padding: 12px 14px;
  text-align: right;
  font-size: 13px;
  border-bottom: 1px solid var(--border-card);
}
.data-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.data-table th:first-child, .data-table td:first-child { text-align: left; }
.data-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(20px);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.empty-state .emoji { font-size: 48px; margin-bottom: 16px; }
.empty-state p { font-size: 14px; line-height: 1.6; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .total-summary { grid-template-columns: 1fr; }
  .detail-stats { grid-template-columns: 1fr; }
  .account-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .summary-value { font-size: 20px; }
}
@media (max-width: 480px) {
  .account-grid { grid-template-columns: 1fr; }
  .tab-btn { font-size: 12px; padding: 10px 4px; }
  .app-header h1 { font-size: 22px; }
}