/* ============================================================
   CoinTrade — Main Stylesheet
   Theme: Dark fintech, sharp & trustworthy
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@400;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --bg:          #0a0b0f;
  --bg2:         #111318;
  --bg3:         #1a1d26;
  --border:      #252836;
  --accent:      #6c63ff;
  --accent2:     #00d4aa;
  --accent3:     #ff6b6b;
  --text:        #e8eaf0;
  --text2:       #8b8fa8;
  --text3:       #555870;
  --success:     #00d4aa;
  --danger:      #ff4d6a;
  --warning:     #ffb84d;
  --info:        #4da6ff;
  --font-head:   'Syne', sans-serif;
  --font-body:   'Inter', sans-serif;
  --font-mono:   'DM Mono', monospace;
  --radius:      10px;
  --radius-lg:   16px;
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:   0 8px 48px rgba(0,0,0,0.6);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Typography ── */
h1,h2,h3,h4,h5 { font-family: var(--font-head); font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.3rem, 3vw, 1.9rem); }
h3 { font-size: 1.2rem; }
p  { color: var(--text2); }
a  { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); }
code, .mono { font-family: var(--font-mono); font-size: 0.875em; }

/* ── Layout ── */
.container  { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.page-wrap  { display: flex; min-height: 100vh; }
.main-content { flex: 1; padding: 2rem; overflow-x: hidden; }

/* ── Sidebar ── */
.sidebar {
  width: 240px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 0 1.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.sidebar-logo .brand {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-logo .brand span { color: var(--accent2); }

.nav-section {
  padding: 0.5rem 0;
  margin-bottom: 0.5rem;
}

.nav-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  padding: 0.25rem 1.5rem;
  margin-bottom: 0.25rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.5rem;
  color: var(--text2);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  color: var(--text);
  background: rgba(108,99,255,0.08);
  border-left-color: var(--accent);
}

.nav-item.active {
  color: var(--accent);
  background: rgba(108,99,255,0.12);
  border-left-color: var(--accent);
}

.nav-item .nav-icon { font-size: 1.1rem; width: 1.25rem; text-align: center; }

.sidebar-footer {
  margin-top: auto;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-avatar {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  color: white;
  flex-shrink: 0;
}

.user-name { font-size: 0.8rem; font-weight: 600; color: var(--text); }
.user-role { font-size: 0.7rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.05em; }

/* ── Cards ── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.card-sm { padding: 1rem; }
.card-lg { padding: 2rem; }

.card-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 0.5rem;
}

.card-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text);
}

.card-value.green { color: var(--success); }
.card-value.purple { color: var(--accent); }

/* ── Stat Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #8b84ff);
  color: white;
  box-shadow: 0 4px 16px rgba(108,99,255,0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(108,99,255,0.4); }

.btn-success {
  background: linear-gradient(135deg, var(--success), #00b894);
  color: #001a15;
  box-shadow: 0 4px 16px rgba(0,212,170,0.2);
}
.btn-success:hover { transform: translateY(-1px); }

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #cc3355);
  color: white;
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning), #ff8c00);
  color: #1a0800;
}

.btn-ghost {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg3); color: var(--text); }

.btn-sm { padding: 0.4rem 0.875rem; font-size: 0.8rem; }
.btn-lg { padding: 0.875rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ── Form Elements ── */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
}
.form-control {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.625rem 0.875rem;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
.form-control::placeholder { color: var(--text3); }
select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }

.form-hint { font-size: 0.775rem; color: var(--text3); margin-top: 0.3rem; }
.form-error { font-size: 0.775rem; color: var(--danger); margin-top: 0.3rem; }

/* ── Table ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text3);
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid rgba(37,40,54,0.6);
  font-size: 0.875rem;
  vertical-align: middle;
}
tr:hover td { background: rgba(255,255,255,0.02); }
tr:last-child td { border-bottom: none; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-success  { background: rgba(0,212,170,0.15); color: var(--success); }
.badge-danger   { background: rgba(255,77,106,0.15); color: var(--danger); }
.badge-warning  { background: rgba(255,184,77,0.15); color: var(--warning); }
.badge-info     { background: rgba(77,166,255,0.15); color: var(--info); }
.badge-purple   { background: rgba(108,99,255,0.15); color: var(--accent); }
.badge-neutral  { background: rgba(139,143,168,0.15); color: var(--text2); }

/* ── Alerts ── */
.alert {
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  border-left: 3px solid;
}
.alert-success { background: rgba(0,212,170,0.08); border-color: var(--success); color: var(--success); }
.alert-error   { background: rgba(255,77,106,0.08); border-color: var(--danger);  color: var(--danger); }
.alert-warning { background: rgba(255,184,77,0.08); border-color: var(--warning); color: var(--warning); }
.alert-info    { background: rgba(77,166,255,0.08); border-color: var(--info);    color: var(--info); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 480px;
  width: 90%;
  transform: translateY(16px);
  transition: transform 0.2s;
}
.modal-overlay.active .modal { transform: translateY(0); }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text3);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }

/* ── UPI Deep Link Box ── */
.upi-link-box {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}
.upi-link-box .upi-note {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent2);
  font-weight: 500;
  margin: 0.5rem 0;
}
.upi-link-box .upi-amount {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-head);
  color: var(--text);
}

/* ── Page Header ── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

/* ── Auth Pages ── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(108,99,255,0.12) 0%, transparent 70%);
  top: -200px; left: -200px;
  pointer-events: none;
}

.auth-page::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,212,170,0.08) 0%, transparent 70%);
  bottom: -100px; right: -100px;
  pointer-events: none;
}

.auth-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo .brand {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-logo p {
  font-size: 0.85rem;
  color: var(--text3);
  margin-top: 0.25rem;
}

/* ── Tabs ── */
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem; }
.tab {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text2);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Transaction Row ── */
.txn-row { display: flex; align-items: center; gap: 1rem; padding: 0.75rem 0; border-bottom: 1px solid rgba(37,40,54,0.5); }
.txn-row:last-child { border: none; }
.txn-icon { width: 38px; height: 38px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1rem; flex-shrink: 0; }
.txn-icon.credit { background: rgba(0,212,170,0.12); }
.txn-icon.debit  { background: rgba(255,77,106,0.12); }
.txn-amount.credit { color: var(--success); font-weight: 600; }
.txn-amount.debit  { color: var(--danger); font-weight: 600; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { padding: 1rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .auth-box { padding: 1.5rem; margin: 1rem; }
  .modal { padding: 1.5rem; }
}

/* ── Toasts ── */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.toast {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem 1.25rem;
  font-size: 0.875rem;
  box-shadow: var(--shadow);
  animation: slideIn 0.25s ease;
  min-width: 280px;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.info    { border-left: 3px solid var(--info); }

@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Utilities ── */
.text-success { color: var(--success) !important; }
.text-danger  { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-muted   { color: var(--text2) !important; }
.text-mono    { font-family: var(--font-mono) !important; }
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.flex { display: flex; } .gap-1 { gap: 0.5rem; } .gap-2 { gap: 1rem; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.w-full { width: 100%; }
.hidden { display: none !important; }
.divider { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }