/* ==========================================================================
   Light Minimalist Executive Design System (Apple/Stripe Inspired)
   ========================================================================== */

:root {
  --bg-main: #f9fafb;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f3f4f6;
  --bg-subtle: #f3f4f6;
  --bg-input: #ffffff;
  
  --border-color: #e5e7eb;
  --border-focus: #3b82f6;

  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;

  --accent-primary: #111827;
  --accent-usd: #059669;
  --accent-cny: #e11d48;
  --error: #ef4444;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

[hidden] { display: none !important; }

.app-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

/* Buttons */
.btn {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 6px rgba(0,0,0,0.15);
  background: #000;
}
.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: #d1d5db;
  transform: translateY(-1px);
}
.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}
.btn-block { width: 100%; }
.btn-danger {
  background-color: transparent;
  color: #ef4444;
  border: 1px solid #fca5a5;
}
.btn-danger:hover {
  background-color: #fef2f2;
  border-color: #ef4444;
}

/* Inputs & Selects */
input, select {
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-primary);
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.55rem 0.8rem;
  outline: none;
  transition: all 0.2s;
  width: 100%;
  box-shadow: 0 1px 2px rgba(0,0,0,0.02) inset;
}
input:focus, select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
input::placeholder { color: var(--text-tertiary); }

/* Login View */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}
.login-header { margin-bottom: 1.75rem; }
.login-header h1 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; }
.login-subtitle { color: var(--text-secondary); font-size: 0.8rem; margin-top: 0.35rem; }
.input-group label { display: block; font-size: 0.775rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 0.4rem; }
.login-form .input-group { margin-bottom: 1.25rem; }
.login-error-msg { color: var(--error); font-size: 0.8rem; margin-top: 0.75rem; }
.login-footer { margin-top: 1.75rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.security-tip { font-size: 0.75rem; color: var(--text-tertiary); }

/* Navbar */
.app-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}
.brand-title { font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.sync-indicator { font-size: 0.75rem; color: var(--text-tertiary); }
.sync-status { padding: 0.6rem 0.9rem; background-color: #fef2f2; border: 1px solid #fca5a5; border-radius: var(--radius-md); color: var(--error); font-size: 0.825rem; margin-bottom: 1.5rem; }

/* Summary Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2.5rem; }
.stat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.stat-card .label { font-size: 0.75rem; color: var(--text-tertiary); font-weight: 500; }
.value-wrapper { display: flex; align-items: baseline; gap: 0.25rem; margin-top: 0.35rem; }
.currency-symbol { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.stat-value { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }

/* Card Wall Grid */
.section-header { margin-bottom: 1rem; }
.section-header h2 { font-size: 0.95rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.25rem; margin-bottom: 3rem; }
.empty-card-wall { grid-column: 1 / -1; background-color: var(--bg-surface); border: 1px dashed var(--border-color); border-radius: var(--radius-lg); padding: 3rem 1.5rem; text-align: center; color: var(--text-secondary); font-size: 0.9rem; }

/* Card Tile */
.card-tile {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card-tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.08);
}
.card-tile-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.15rem; }
.card-tile-header h3 { font-size: 1rem; font-weight: 600; letter-spacing: -0.01em; }
.currency-pill { font-size: 0.7rem; font-weight: 600; padding: 0.15rem 0.5rem; border-radius: 4px; letter-spacing: 0.04em; }
.currency-pill.usd { background-color: #d1fae5; color: var(--accent-usd); }
.currency-pill.cny { background-color: #ffe4e6; color: var(--accent-cny); }

/* Tasks */
.card-tasks-container { display: flex; flex-direction: column; gap: 0.85rem; margin-bottom: 1.25rem; flex-grow: 1; }
.task-item { background-color: var(--bg-main); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.75rem 0.85rem; }
.task-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.4rem; font-size: 0.8rem; }
.task-title { font-weight: 500; color: var(--text-primary); }
.task-badge { font-size: 0.675rem; color: var(--text-tertiary); margin-left: 0.4rem; }
.task-percent { font-weight: 600; color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.task-percent.done { color: var(--accent-usd); }
.progress-track { height: 4px; background-color: #e5e7eb; border-radius: 2px; overflow: hidden; margin-bottom: 0.35rem; }
.progress-fill { height: 100%; background: #3b82f6; border-radius: 2px; transition: width 0.3s ease; }
.progress-fill.done { background: var(--accent-usd); }
.task-numbers { display: flex; justify-content: space-between; font-size: 0.725rem; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }

/* Quick Add Transaction */
.quick-add-form { display: flex; gap: 0.5rem; align-items: center; background: var(--bg-main); padding: 0.5rem; border-radius: var(--radius-md); border: 1px solid var(--border-color); }
.quick-add-form input { padding: 0.4rem 0.6rem; font-size: 0.8rem; height: 34px; background: var(--bg-surface); border: 1px solid var(--border-color); }
.quick-add-form input:focus { border-color: var(--border-focus); }
.quick-add-form .add-date { width: 120px; }
.quick-add-form .add-amount { flex-grow: 1; min-width: 80px; }
.quick-add-form .add-btn { height: 34px; padding: 0 0.8rem; white-space: nowrap; }

/* Monthly Detail Table */
.table-card { background-color: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.table-card table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.85rem; }
.table-card th { background-color: var(--bg-main); color: var(--text-secondary); font-weight: 500; font-size: 0.75rem; padding: 0.75rem 1.25rem; border-bottom: 1px solid var(--border-color); }
.table-card td { padding: 0.85rem 1.25rem; border-bottom: 1px solid var(--border-color); color: var(--text-primary); font-variant-numeric: tabular-nums; }
.table-card tr:last-child td { border-bottom: none; }

/* Management Modal */
.modal-dialog { padding: 0; border: none; background: transparent; max-width: 580px; width: 90vw; margin: auto; }
.modal-dialog::backdrop { background-color: rgba(0, 0, 0, 0.4); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.modal-content { background-color: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg); max-height: 85vh; display: flex; flex-direction: column; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
.modal-header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; }
.modal-header h2 { font-size: 1rem; font-weight: 600; }
.modal-close-btn { background: none; border: none; color: var(--text-tertiary); font-size: 1.25rem; cursor: pointer; padding: 0 0.4rem; }
.modal-close-btn:hover { color: var(--text-primary); }
.modal-body { padding: 1.25rem; overflow-y: auto; }
.add-card-box { background-color: var(--bg-main); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 1rem; margin-bottom: 1.5rem; }
.box-title { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 0.65rem; }
.inline-form { display: flex; gap: 0.5rem; }
.existing-cards-header { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 0.75rem; }
.manage-card-block { background-color: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-md); margin-bottom: 1.5rem; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.manage-card-top { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; background: var(--bg-main); border-bottom: 1px solid var(--border-color); }
.manage-card-name { font-weight: 600; font-size: 0.95rem; display: flex; align-items: center; gap: 0.5rem; }
.manage-card-inner { padding: 1.25rem; }
.sub-header { font-size: 0.75rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; margin: 1.5rem 0 0.75rem; display: flex; align-items: center; gap: 0.5rem; }
.sub-header::after { content: ""; flex-grow: 1; height: 1px; background: var(--border-color); }
.sub-header:first-child { margin-top: 0; }
.add-task-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 0.4rem; margin-bottom: 0.75rem; }
.manage-list { list-style: none; display: flex; flex-direction: column; gap: 0.35rem; }
.manage-list li { background-color: var(--bg-main); padding: 0.4rem 0.65rem; border-radius: var(--radius-sm); border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; }
.manage-list li.tx-edit-row { flex-direction: column; align-items: stretch; gap: 0.5rem; padding: 0.75rem; }
.tx-edit-row .tx-date-input { width: 130px; padding: 0.2rem 0.4rem; height: 30px; }
.tx-edit-row .tx-amount-input { flex-grow: 1; padding: 0.2rem 0.4rem; height: 30px; }

/* Responsive */
@media (max-width: 640px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }

/* Bank Specific Colors (Light Minimalist) */
.card-tile[data-bank="amex"] { background: linear-gradient(145deg, #ffffff, #f0f7ff); border-color: #bfdbfe; }
.card-tile[data-bank="ccb"] { background: linear-gradient(145deg, #ffffff, #eff6ff); border-color: #bae6fd; }
.card-tile[data-bank="cib"] { background: linear-gradient(145deg, #ffffff, #fef2f2); border-color: #fecaca; }

.manage-card-block[data-bank="amex"] .manage-card-top { background: linear-gradient(145deg, #ffffff, #f0f7ff); border-bottom-color: #bfdbfe; }
.manage-card-block[data-bank="ccb"] .manage-card-top { background: linear-gradient(145deg, #ffffff, #eff6ff); border-bottom-color: #bae6fd; }
.manage-card-block[data-bank="cib"] .manage-card-top { background: linear-gradient(145deg, #ffffff, #fef2f2); border-bottom-color: #fecaca; }