/* ═══════════════════════════
   My Balance — Premium 
   ═══════════════════════════ */

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

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

/* ── Variables ── */
:root {
  --bg: #09090b;
  --bg-card: #131316;
  --bg-input: rgba(255,255,255,0.04);
  --text: #fafafa;
  --text-secondary: #a1a1aa;
  --text-tertiary: #52525b;
  --accent: #6366f1;
  --accent-dim: rgba(99,102,241,0.12);
  --success: #22c55e;
  --success-dim: rgba(34,197,94,0.10);
  --danger: #ef4444;
  --danger-dim: rgba(239,68,68,0.10);
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.10);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-card: 0 0 0 1px rgba(255,255,255,0.04),
                 0 1px 2px rgba(0,0,0,0.16),
                 0 4px 12px rgba(0,0,0,0.10);

  --shadow-card-hover: 0 0 0 1px rgba(255,255,255,0.06),
                        0 1px 2px rgba(0,0,0,0.16),
                        0 8px 24px rgba(0,0,0,0.14);

  --shadow-balance: 0 0 0 1px rgba(255,255,255,0.05),
                     0 1px 1px rgba(0,0,0,0.40),
                     0 2px 4px rgba(0,0,0,0.20),
                     0 8px 16px rgba(0,0,0,0.14),
                     0 24px 48px rgba(0,0,0,0.08);
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Base ── */
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Background ── */
.bg-gradient {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99,102,241,0.04), transparent),
              radial-gradient(ellipse 50% 80% at 80% 100%, rgba(34,197,94,0.02), transparent);
}
.bg-noise {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 160px 160px;
}

/* ── Container ── */
.container {
  max-width: 960px; margin: 0 auto; padding: 56px 24px 80px;
  animation: fadeUp 0.6s var(--ease);
}

/* ── Typography ── */
h1, h2, h3 { font-weight: 600; line-height: 1.3; color: var(--text); }
.card-heading {
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  letter-spacing: 0.02em; margin-bottom: 24px;
}

/* ── Balance Card ── */
.balance-card {
  position: relative;
  background: radial-gradient(ellipse at 50% 0%, rgba(30,30,37,1) 0%, rgba(19,19,24,1) 100%);
  border-radius: var(--radius-xl);
  padding: 44px 48px 36px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-balance);
  display: flex; flex-direction: column; align-items: center;
  overflow: hidden;
  transition: box-shadow 0.5s var(--ease), transform 0.5s var(--ease);
}
.balance-card:hover {
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 1px 1px rgba(0,0,0,0.40),
    0 2px 4px rgba(0,0,0,0.20),
    0 8px 16px rgba(0,0,0,0.16),
    0 32px 64px rgba(0,0,0,0.10);
}

.balance-card::before {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius-xl); pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, transparent 50%);
}

.balance-card::after {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius-xl); pointer-events: none; opacity: 0;
  transition: opacity 0.2s ease;
}
.balance-card.flash-green::after { opacity: 0.08; background: var(--success); }
.balance-card.flash-red::after   { opacity: 0.08; background: var(--danger); }

.balance-currency {
  font-size: 13px; font-weight: 500; color: var(--text-tertiary);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.balance-amount {
  font-size: 80px; font-weight: 600; letter-spacing: -0.04em; line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  transition: color 0.3s var(--ease);
}
.balance-amount.positive { color: var(--success); }
.balance-amount.negative { color: var(--danger); }

.balance-stats {
  display: flex; align-items: center; gap: 28px; margin-top: 28px;
}

.balance-stat {
  display: flex; align-items: center; gap: 7px;
}
.balance-stat svg { flex-shrink: 0; }
.balance-stat span { font-size: 13px; font-weight: 500; font-variant-numeric: tabular-nums; }
.balance-stat:first-of-type span { color: var(--success); }
.balance-stat:last-of-type  span { color: var(--danger); }

.balance-stat-label {
  font-size: 11px !important; font-weight: 400 !important; color: var(--text-tertiary) !important;
  margin-left: 2px;
}

.balance-stat-divider {
  width: 1px; height: 22px;
  background: rgba(255,255,255,0.06);
}

/* ── Dashboard Grid ── */
.dashboard {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 28px; align-items: start;
  animation: fadeUp 0.6s var(--ease) 0.15s both;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-card-hover); }
.transactions-card { min-height: 400px; }

/* ── Segmented Control ── */
.segmented-control {
  display: flex; background: rgba(255,255,255,0.04);
  border-radius: var(--radius-sm); padding: 3px; margin-bottom: 20px;
}
.segment {
  flex: 1; padding: 8px 0; border: none; border-radius: 6px;
  font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 500;
  color: var(--text-tertiary); background: transparent; cursor: pointer;
  transition: all 0.2s var(--ease); text-align: center;
  letter-spacing: 0.01em;
}
.segment.active { color: var(--text); background: var(--bg-card); box-shadow: 0 1px 3px rgba(0,0,0,0.3); }
.segment:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Form ── */
.input-group { position: relative; margin-bottom: 16px; }

.input-group input {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif; font-size: 14px; font-weight: 400;
  background: var(--bg-input); color: var(--text);
  outline: none; transition: all 0.2s var(--ease);
}
.input-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  background: rgba(255,255,255,0.05);
}
.input-group input::placeholder { color: var(--text-tertiary); }

.btn {
  width: 100%; padding: 12px 20px; border: none; border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif; font-size: 14px; font-weight: 500;
  cursor: pointer; color: #fff; position: relative; overflow: hidden;
  transition: all 0.2s var(--ease), background 0.3s var(--ease);
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn.type-income  { background: #22c55e; }
.btn.type-expense { background: #ef4444; }
.btn:hover { filter: brightness(1.1); }
.btn:active { filter: brightness(0.95); transform: scale(0.98); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn-text, .btn-loading, .btn-success {
  display: inline-flex; align-items: center; gap: 6px;
  transition: all 0.25s var(--ease);
}
.btn-loading, .btn-success {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
}
.btn.loading { pointer-events: none; opacity: 0.8; }
.btn.loading .btn-text { opacity: 0; }
.btn.loading .btn-loading { opacity: 1; }
.btn.success { pointer-events: none; }
.btn.success .btn-text { opacity: 0; }
.btn.success .btn-success { opacity: 1; }

.spinner { animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Card Header ── */
.card-header {
  display: flex; align-items: center; gap: 10px; margin-bottom: 16px;
  padding-bottom: 14px; border-bottom: 1px solid var(--border);
}
.card-header .card-heading { margin-bottom: 0; }

/* Badge */
.badge {
  background: rgba(99,102,241,0.12); color: var(--accent);
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 20px;
  margin-left: auto;
}

/* Icon button */
.btn-icon {
  background: none; border: none; cursor: pointer; padding: 6px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-tertiary); transition: all 0.2s var(--ease);
}
.btn-icon:hover { color: var(--text-secondary); background: rgba(255,255,255,0.05); }
.btn-icon:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Transactions ── */
#transactionList { min-height: 200px; }

.tx-group-header {
  font-size: 11px; font-weight: 600; color: var(--text-tertiary);
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 16px 0 8px;
  position: sticky; top: 0; background: var(--bg-card); z-index: 1;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.tx-group-header:first-child { padding-top: 0; }

.transaction {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; margin: 0 -12px; border-radius: 6px;
  transition: background 0.15s ease;
}
.transaction:hover { background: rgba(255,255,255,0.03); }
.transaction.removing { animation: slideOut 0.25s var(--ease) forwards; }

.transaction-info { display: flex; align-items: center; gap: 12px; min-width: 0; }

.tx-icon {
  width: 34px; height: 34px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.tx-icon.income  { background: var(--success-dim); color: var(--success); }
.tx-icon.expense { background: var(--danger-dim);  color: var(--danger);  }

.tx-details { min-width: 0; }
.tx-source {
  font-size: 14px; font-weight: 500; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 160px;
}
.tx-date { font-size: 12px; color: var(--text-tertiary); margin-top: 1px; }

.transaction-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.tx-amount {
  font-size: 15px; font-weight: 500; font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.tx-amount.income  { color: var(--success); }
.tx-amount.expense { color: var(--danger);  }

.tx-delete {
  width: 28px; height: 28px; border: none; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; cursor: pointer; color: var(--text-tertiary);
  opacity: 0; transition: all 0.15s ease;
}
.transaction:hover .tx-delete { opacity: 1; }
.tx-delete:hover { background: var(--danger-dim); color: var(--danger); }
.tx-delete:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; opacity: 1; }

/* ── Empty State ── */
.empty-state { text-align: center; padding: 48px 20px; }
.empty-state svg { opacity: 0.3; margin-bottom: 16px; }
.empty-state p { color: var(--text-secondary); font-size: 14px; }
.empty-sub { color: var(--text-tertiary) !important; font-size: 13px !important; margin-top: 4px; }

/* ── Toast ── */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; pointer-events: none; }
.toast {
  background: #1a1a1f; border: 1px solid var(--border-hover); border-radius: var(--radius-sm);
  padding: 12px 16px; box-shadow: var(--shadow-card-hover);
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 500; color: var(--text);
  pointer-events: auto; animation: toastIn 0.3s var(--ease) forwards;
}
.toast.removing { animation: toastOut 0.25s ease forwards; }
.toast-icon { flex-shrink: 0; }
.toast-icon.success { color: var(--success); }
.toast-icon.error   { color: var(--danger); }
@keyframes toastIn  { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(24px); } }

/* ── Keyframes ── */
@keyframes fadeUp    { from { opacity: 0; transform: translateY(32px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeOut   { to   { opacity: 0; } }
@keyframes slideOut  { to   { opacity: 0; transform: translateX(24px); } }
@keyframes scaleIn   { from { opacity: 0; transform: scale(0.96); } to { opacity: 1; transform: scale(1); } }
@keyframes bump      { 0% { transform: scale(1); } 30% { transform: scale(1.06); } 100% { transform: scale(1); } }
@keyframes formShake { 0%,100% { transform: translateX(0); } 20% { transform: translateX(-6px); } 40% { transform: translateX(6px); } 60% { transform: translateX(-4px); } 80% { transform: translateX(4px); } }
.balance-amount.bump { animation: bump 0.35s var(--ease); }

/* ── Skeleton ── */
.skeleton { display: flex; align-items: center; gap: 12px; padding: 10px 0; }
.skeleton-icon { width: 34px; height: 34px; border-radius: 8px; background: rgba(255,255,255,0.04); animation: skelPulse 1.5s ease-in-out infinite; }
.skeleton-line { height: 12px; border-radius: 6px; background: rgba(255,255,255,0.04); animation: skelPulse 1.5s ease-in-out infinite; }
.skeleton-line.w60 { width: 60%; }
.skeleton-line.w30 { width: 30%; }
@keyframes skelPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ── Responsive ── */
@media (max-width: 768px) {
  .container { padding: 32px 16px 60px; }
  .balance-card { padding: 40px 24px 32px; border-radius: var(--radius-lg); }
  .balance-amount { font-size: 56px; }
  .balance-stats { flex-direction: column; gap: 12px; }
  .dashboard { grid-template-columns: 1fr; }
  .transactions-card { min-height: auto; }
  .tx-source { max-width: 120px; }
}

@media (max-width: 480px) {
  .balance-amount { font-size: 44px; }
  .balance-card { padding: 32px 20px 24px; }
}

/* ── Login Overlay ── */
#loginOverlay {
  position: fixed; inset: 0; z-index: 10000;
  background: #09090b;
}
.bg-ambient {
  position: fixed; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(16,185,129,0.06), transparent);
  z-index: 0;
}
.glass-panel-strong {
  background: linear-gradient(180deg, #131316 0%, rgba(19,19,22,0.8) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.bg-gradient-card { position: relative; }
.bg-gradient-card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, transparent 50%);
}
.hover-border-gradient { transition: border-color .3s; }
.hover-border-gradient:hover { border-color: rgba(16,185,129,0.3); }
.text-gradient {
  background: linear-gradient(135deg, #fafafa 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-ink-tertiary { color: #71717a; }
.min-h-screen { min-height: 100vh; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.p-4 { padding: 16px; }
.w-full { width: 100%; }
.max-w-sm { max-width: 360px; }
.z-10 { z-index: 10; }
.text-center { text-align: center; }
.mb-6 { margin-bottom: 24px; }
.w-12 { width: 48px; }
.h-12 { height: 48px; }
.rounded-xl { border-radius: 12px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-3 { margin-bottom: 12px; }
.text-2xl { font-size: 24px; }
.font-bold { font-weight: 700; }
.tracking-tight { letter-spacing: -0.02em; }
.text-sm { font-size: 14px; }
.mt-1 { margin-top: 4px; }
.space-y-4 > * + * { margin-top: 16px; }
.rounded-lg { border-radius: 12px; }
.border { border: 1px solid rgba(255,255,255,0.05); }
.p-6 { padding: 24px; }

#loginOverlay input {
  background: #1a1a1f;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: 'Inter', sans-serif;
  color: #fafafa;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
}
#loginOverlay input:focus {
  border-color: #10b981;
  box-shadow: 0 0 0 2px rgba(16,185,129,0.15);
}
#loginOverlay input::placeholder { color: #52525b; }

#loginOverlay button {
  background: #10b981;
  color: #fafafa;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  font-weight: 500;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: background .2s, transform .1s;
  width: 100%;
}
#loginOverlay button:hover { background: #34d399; }
#loginOverlay button:active { transform: scale(0.97); }
#loginOverlay button:disabled { opacity: 0.5; cursor: default; }

.login-spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(250,250,250,0.3);
  border-top-color: #fafafa;
  border-radius: 50%;
  animation: loginSpin .6s linear infinite;
  margin: 0 auto;
}
@keyframes loginSpin { to { transform: rotate(360deg); } }

.login-error {
  display: none;
  align-items: center;
  gap: 8px;
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.08);
  color: #ef4444;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  text-align: left;
  margin-bottom: 4px;
}
.login-error.show { display: flex; }
.login-error svg { width: 16px; height: 16px; flex-shrink: 0; }