/* ═══════════════════════════════════════════════════
   SawixWallet — Premium Dark Design System
   Font: Plus Jakarta Sans (display) + Space Grotesk (data)
   Palette: Deep navy · Sapphire accent · Emerald / Amber signals
   ═══════════════════════════════════════════════════ */

:root {
  /* ── Core Palette ── */
  --bg-base:      #080d17;
  --bg-surface:   #0f1829;
  --bg-card:      #131f33;
  --bg-raised:    #1a2840;
  --bg-hover:     #1e2e47;
  --border:       rgba(99, 135, 190, 0.15);
  --border-bright:rgba(99, 135, 190, 0.30);

  /* ── Accent ── */
  --accent:       #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow:  rgba(59, 130, 246, 0.25);
  --accent-dim:   rgba(59, 130, 246, 0.12);

  /* ── Signals ── */
  --gave:         #10b981;  /* green — money given (owed to me) */
  --gave-dim:     rgba(16, 185, 129, 0.12);
  --got:          #f59e0b;  /* amber — money received (I owe) */
  --got-dim:      rgba(245, 158, 11, 0.12);
  --danger:       #ef4444;
  --danger-dim:   rgba(239, 68, 68, 0.12);
  --success:      #22c55e;
  --info:         #06b6d4;

  /* ── Text ── */
  --text-primary:   #e8edf5;
  --text-secondary: #8899b4;
  --text-muted:     #55688a;
  --text-accent:    #60a5fa;

  /* ── Type ── */
  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-data:    'Space Grotesk', monospace;

  /* ── Spacing ── */
  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  /* ── Shadows ── */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:   0 8px 48px rgba(0,0,0,0.5);
}

/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; }
input, select, textarea {
  font-family: inherit;
  background: var(--bg-raised);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 0.9rem;
  width: 100%;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
select option { background: var(--bg-card); }

/* ── App Shell ──────────────────────────────────────── */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────── */
.sidebar {
  width: 248px;
  min-height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  z-index: 100;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
.brand-icon {
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}
.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  line-height: 1.2;
}
.brand-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.sidebar-close {
  display: none;
  background: none;
  color: var(--text-secondary);
  padding: 0.35rem;
  border-radius: var(--radius-sm);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1.5px solid var(--accent);
  color: var(--accent-light);
  font-weight: 700;
  font-size: 0.9rem;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.user-name {
  font-size: 0.8rem;
  font-weight: 600;
  display: block;
  color: var(--text-primary);
}
.user-email {
  font-size: 0.68rem;
  color: var(--text-muted);
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 130px;
}

.sidebar-nav {
  flex: 1;
  padding: 0.75rem 0;
  overflow-y: auto;
}
.nav-section {
  padding: 0.25rem 0 0.5rem;
}
.nav-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.5rem 1.25rem 0.25rem;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 1.25rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 0;
  transition: all 0.15s;
  position: relative;
}
.nav-link i { width: 16px; font-size: 0.85rem; }
.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}
.nav-link.active {
  color: var(--accent-light);
  background: var(--accent-dim);
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 4px; bottom: 4px;
  width: 3px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}
.nav-logout { color: var(--danger) !important; }
.nav-logout:hover { background: var(--danger-dim) !important; }

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
}
.default-currency-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ── Main Content ────────────────────────────────────── */
.main-content {
  margin-left: 248px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Topbar ─────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.75rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0;
  z-index: 50;
}
.menu-toggle {
  display: none;
  background: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
  padding: 0.35rem;
  border-radius: var(--radius-sm);
}
.topbar-title {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.topbar-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1.5px solid var(--accent);
  color: var(--accent-light);
  font-weight: 700;
  font-size: 0.8rem;
  display: grid; place-items: center;
}

/* ── Flash Messages ──────────────────────────────────── */
.flash-container {
  padding: 0.75rem 1.75rem;
}
.flash {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.83rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  animation: slideIn 0.25s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.flash-success { background: rgba(16,185,129,0.12); color: #34d399; border: 1px solid rgba(16,185,129,0.25); }
.flash-error   { background: var(--danger-dim); color: #fc8181; border: 1px solid rgba(239,68,68,0.25); }
.flash-info    { background: rgba(6,182,212,0.1); color: #67e8f9; border: 1px solid rgba(6,182,212,0.2); }
.flash-close {
  margin-left: auto;
  background: none;
  color: inherit;
  opacity: 0.6;
  font-size: 0.8rem;
  padding: 0.2rem;
}

/* ── Page Body ───────────────────────────────────────── */
.page-body {
  padding: 1.75rem;
  flex: 1;
}
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-heading { font-size: 1.4rem; font-weight: 700; }
.page-subheading { font-size: 0.82rem; color: var(--text-secondary); margin-top: 0.2rem; }

/* ── Cards ───────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}
.card-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

/* ── Stat Cards ──────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s;
}
.stat-card:hover { border-color: var(--border-bright); }
.stat-card-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius);
  display: grid; place-items: center;
  font-size: 1rem;
  margin-bottom: 0.85rem;
}
.stat-card-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
}
.stat-card-value {
  font-family: var(--font-data);
  font-size: 1.35rem;
  font-weight: 700;
  display: block;
  margin-top: 0.2rem;
  line-height: 1.2;
}
.stat-card-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  display: block;
}

/* ── Tables ──────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
}
table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg-hover); }
tbody td {
  padding: 0.75rem 1rem;
  font-size: 0.83rem;
  color: var(--text-primary);
  vertical-align: middle;
}

/* ── Badges ──────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.badge-gave     { background: var(--gave-dim); color: var(--gave); }
.badge-got      { background: var(--got-dim); color: var(--got); }
.badge-pending  { background: rgba(99,102,241,0.12); color: #a5b4fc; }
.badge-partial  { background: rgba(245,158,11,0.12); color: #fcd34d; }
.badge-settled  { background: rgba(16,185,129,0.1); color: #6ee7b7; }
.badge-overdue  { background: var(--danger-dim); color: #fc8181; }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: inherit;
  font-size: 0.83rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.18s;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--bg-raised);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
}
.btn-danger {
  background: var(--danger-dim);
  color: #fc8181;
  border: 1px solid rgba(239,68,68,0.2);
}
.btn-danger:hover { background: rgba(239,68,68,0.2); }
.btn-sm { font-size: 0.75rem; padding: 0.35rem 0.75rem; }
.btn-xs { font-size: 0.68rem; padding: 0.25rem 0.55rem; }
.btn-gave   { background: var(--gave-dim); color: var(--gave); border: 1px solid rgba(16,185,129,0.25); }
.btn-gave:hover { background: rgba(16,185,129,0.2); }
.btn-got    { background: var(--got-dim); color: var(--got); border: 1px solid rgba(245,158,11,0.25); }
.btn-got:hover  { background: rgba(245,158,11,0.2); }

/* ── Forms ───────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}
.form-row { display: grid; gap: 1rem; }
.form-row-2 { grid-template-columns: 1fr 1fr; }
.form-row-3 { grid-template-columns: 1fr 1fr 1fr; }

/* ── Modal ───────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: none;
  place-items: center;
  padding: 1rem;
}
.modal-overlay.open { display: grid; }
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.modal-title { font-size: 1.05rem; font-weight: 700; }
.modal-close {
  background: none;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s;
}
.modal-close:hover { color: var(--text-primary); }

/* ── Filter Bar ──────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  align-items: center;
}
.filter-bar select,
.filter-bar input {
  width: auto;
  min-width: 130px;
  padding: 0.5rem 0.8rem;
  font-size: 0.8rem;
}
.filter-bar .search-input { min-width: 200px; }

/* ── Amount Display ──────────────────────────────────── */
.amount-gave  { color: var(--gave); font-family: var(--font-data); font-weight: 600; }
.amount-got   { color: var(--got);  font-family: var(--font-data); font-weight: 600; }
.amount-text  { font-family: var(--font-data); }

/* ── Auth Pages ──────────────────────────────────────── */
.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59,130,246,0.08) 0%, transparent 70%),
              var(--bg-base);
}
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}
.auth-logo {
  text-align: center;
  margin-bottom: 1.75rem;
}
.auth-logo .brand-icon { font-size: 2rem; color: var(--accent); display: block; margin-bottom: 0.5rem; }
.auth-logo h1 { font-size: 1.25rem; font-weight: 700; }
.auth-logo p  { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }
.auth-footer {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.auth-footer a { color: var(--accent-light); }

/* ── Overlay for mobile sidebar ──────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
  backdrop-filter: blur(2px);
}

/* ── Empty State ─────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
}
.empty-state i { font-size: 2.5rem; margin-bottom: 0.75rem; opacity: 0.4; display: block; }
.empty-state h3 { font-size: 1rem; margin-bottom: 0.35rem; color: var(--text-secondary); }
.empty-state p  { font-size: 0.82rem; }

/* ── Chart Container ─────────────────────────────────── */
.chart-wrap { position: relative; }

/* ── Grid Layouts ────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-close { display: flex; }
  .sidebar-overlay.open { display: block; }
  .main-content { margin-left: 0; }
  .menu-toggle { display: flex; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row-2, .form-row-3 { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .page-body { padding: 1rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-bar select, .filter-bar input { width: 100%; }
}

/* ── Utility ─────────────────────────────────────────── */
.text-muted    { color: var(--text-muted); }
.text-secondary{ color: var(--text-secondary); }
.text-accent   { color: var(--accent-light); }
.text-gave     { color: var(--gave); }
.text-got      { color: var(--got); }
.text-danger   { color: var(--danger); }
.fw-600        { font-weight: 600; }
.fw-700        { font-weight: 700; }
.font-data     { font-family: var(--font-data); }
.mt-1          { margin-top: 0.5rem; }
.mt-2          { margin-top: 1rem; }
.mb-1          { margin-bottom: 0.5rem; }
.mb-2          { margin-bottom: 1rem; }
.d-flex        { display: flex; }
.align-center  { align-items: center; }
.gap-1         { gap: 0.5rem; }
.gap-2         { gap: 1rem; }
.flex-wrap     { flex-wrap: wrap; }
.flex-1        { flex: 1; }
.ml-auto       { margin-left: auto; }
.w-100         { width: 100%; }