/* ============================================================
   TradeJournal — Global Dark Theme CSS
   Colors: GitHub Dark inspired
   ============================================================ */

:root {
  --bg-primary:    #0d1117;
  --bg-secondary:  #161b22;
  --bg-tertiary:   #21262d;
  --border:        #30363d;
  --text-primary:  #c9d1d9;
  --text-muted:    #8b949e;
  --text-faint:    #484f58;

  --green:         #3fb950;
  --green-dark:    #238636;
  --red:           #f85149;
  --red-dark:      #b91c1c;
  --blue:          #58a6ff;
  --blue-dark:     #1f6feb;
  --yellow:        #e3b341;
  --purple:        #bc8cff;
  --orange:        #ffa657;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;

  --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--blue);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ============================================================
   Layout
   ============================================================ */
.wrapper {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-content {
  padding: 24px 0 48px;
}

/* ============================================================
   Top Bar / Navigation
   ============================================================ */
.topbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  height: 60px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar .wrapper {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
}

.topbar-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.topbar-brand:hover { text-decoration: none; color: var(--blue); }

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.topbar-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.topbar-nav a:hover,
.topbar-nav a.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.topbar-user {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--blue-dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================================
   Stats / Tiles
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--blue);
}

.stat.green::before { background: var(--green); }
.stat.red::before   { background: var(--red); }
.stat.yellow::before { background: var(--yellow); }
.stat.purple::before { background: var(--purple); }

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-value.green { color: var(--green); }
.stat-value.red   { color: var(--red); }

.stat-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ============================================================
   Grid layouts
   ============================================================ */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

.col-span-2 { grid-column: span 2; }

/* ============================================================
   Tables
   ============================================================ */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--bg-tertiary);
}

td {
  padding: 10px 14px;
  color: var(--text-primary);
  white-space: nowrap;
}

td.muted { color: var(--text-muted); }
td.mono  { font-family: var(--font-mono); font-size: 13px; }

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge.buy,
.badge.green  { background: rgba(63, 185, 80, 0.15); color: var(--green); border: 1px solid rgba(63, 185, 80, 0.3); }
.badge.sell,
.badge.red    { background: rgba(248, 81, 73, 0.15);  color: var(--red);   border: 1px solid rgba(248, 81, 73, 0.3); }
.badge.blue   { background: rgba(88, 166, 255, 0.15); color: var(--blue);  border: 1px solid rgba(88, 166, 255, 0.3); }
.badge.yellow { background: rgba(227, 179, 65, 0.15); color: var(--yellow);border: 1px solid rgba(227, 179, 65, 0.3); }
.badge.purple { background: rgba(188, 140, 255, 0.15);color: var(--purple);border: 1px solid rgba(188, 140, 255, 0.3); }
.badge.muted  { background: var(--bg-tertiary); color: var(--text-muted);  border: 1px solid var(--border); }

.badge.bitvavo { background: rgba(0, 153, 255, 0.15); color: #0099ff; border: 1px solid rgba(0, 153, 255, 0.3); }
.badge.bybit   { background: rgba(255, 166, 87, 0.15); color: var(--orange); border: 1px solid rgba(255, 166, 87, 0.3); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn:hover { text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--green-dark);
  color: #fff;
  border-color: var(--green-dark);
}
.btn-primary:hover { background: #2ea043; }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover { background: #2d333b; border-color: #6e7681; }

.btn-danger {
  background: rgba(248, 81, 73, 0.1);
  color: var(--red);
  border-color: rgba(248, 81, 73, 0.4);
}
.btn-danger:hover { background: rgba(248, 81, 73, 0.2); }

.btn-blue {
  background: var(--blue-dark);
  color: #fff;
  border-color: var(--blue-dark);
}
.btn-blue:hover { background: #388bfd; }

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="search"],
select,
textarea {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font);
  padding: 8px 12px;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

input::placeholder { color: var(--text-faint); }

select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-error {
  font-size: 13px;
  color: var(--red);
  margin-top: 4px;
}

/* ============================================================
   Alerts / Flash messages
   ============================================================ */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 16px;
  border: 1px solid;
}

.alert-success {
  background: rgba(63, 185, 80, 0.1);
  border-color: rgba(63, 185, 80, 0.3);
  color: var(--green);
}

.alert-error {
  background: rgba(248, 81, 73, 0.1);
  border-color: rgba(248, 81, 73, 0.3);
  color: var(--red);
}

.alert-info {
  background: rgba(88, 166, 255, 0.1);
  border-color: rgba(88, 166, 255, 0.3);
  color: var(--blue);
}

.alert-warning {
  background: rgba(227, 179, 65, 0.1);
  border-color: rgba(227, 179, 65, 0.3);
  color: var(--yellow);
}

/* ============================================================
   Auth pages (login, mfa, register)
   ============================================================ */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo h1 {
  font-size: 26px;
  font-weight: 700;
  color: var(--blue);
}

.auth-logo p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

.auth-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.auth-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
}

/* MFA code input */
.mfa-input {
  font-size: 36px !important;
  font-family: var(--font-mono) !important;
  text-align: center;
  letter-spacing: 16px;
  padding: 16px 12px !important;
  font-weight: 700;
}

/* ============================================================
   Page header
   ============================================================ */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-header h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-header p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: center;
  margin-top: 20px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  background: var(--bg-secondary);
  transition: background 0.15s;
}

.pagination a:hover {
  background: var(--bg-tertiary);
  text-decoration: none;
}

.pagination .current {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  color: #fff;
}

.pagination .disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ============================================================
   Filters bar
   ============================================================ */
.filters-bar {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.filters-bar .form-group {
  margin-bottom: 0;
  min-width: 160px;
}

.filters-bar label {
  font-size: 11px;
}

/* ============================================================
   Chart container
   ============================================================ */
.chart-container {
  position: relative;
  width: 100%;
}

/* ============================================================
   Exchange account cards
   ============================================================ */
.exchange-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.exchange-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
}

.exchange-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.exchange-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.exchange-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.exchange-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* ============================================================
   Empty state
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 400px;
  margin: 0 auto;
}

/* ============================================================
   Utility classes
   ============================================================ */
.text-green  { color: var(--green); }
.text-red    { color: var(--red); }
.text-blue   { color: var(--blue); }
.text-yellow { color: var(--yellow); }
.text-muted  { color: var(--text-muted); }
.text-right  { text-align: right; }
.text-center { text-align: center; }

.mono { font-family: var(--font-mono); }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }

.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; }
.gap-2        { gap: 8px; }
.gap-3        { gap: 12px; }
.gap-4        { gap: 16px; }
.flex-wrap    { flex-wrap: wrap; }
.ml-auto      { margin-left: auto; }

.hidden { display: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .grid-2,
  .grid-3 { grid-template-columns: 1fr; }
  .col-span-2 { grid-column: span 1; }

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

  .topbar-nav { display: none; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .auth-card {
    padding: 24px;
  }

  .wrapper {
    padding: 0 16px;
  }
}

/* ============================================================
   Scrollbar (Webkit)
   ============================================================ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #6e7681; }