:root {
  --bg: #0f172a;
  --bg-accent: #111827;
  --card: rgba(255, 255, 255, 0.08);
  --card-strong: rgba(255, 255, 255, 0.14);
  --text: #f8fafc;
  --muted: #cbd5f5;
  --border: rgba(255, 255, 255, 0.12);
  --income: #22c55e;
  --expense: #f43f5e;
  --primary: #38bdf8;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.35);
  --radius: 18px;
  --font:
    "Space Grotesk", "Sora", "Poppins", system-ui, -apple-system, sans-serif;
}

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

body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, #1e293b, transparent 55%),
    radial-gradient(circle at 80% 10%, #0ea5e9, transparent 35%),
    radial-gradient(circle at 80% 85%, #7c3aed, transparent 40%), var(--bg);
  padding: 32px;
}

.bg-gradient {
  position: fixed;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(14, 165, 233, 0.18),
    rgba(124, 58, 237, 0.14)
  );
  z-index: -2;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  gap: 24px;
}

.app__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.app__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.app__eyebrow {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.app__title {
  font-size: clamp(28px, 4vw, 40px);
  margin-top: 6px;
}

.app__subtitle {
  margin-top: 8px;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  backdrop-filter: blur(12px);
}

.summary {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.summary__card {
  display: grid;
  gap: 8px;
}

.summary__label {
  color: var(--muted);
  font-size: 14px;
}

.summary__value {
  font-size: 28px;
}

.summary__value--income {
  color: var(--income);
}

.summary__value--expense {
  color: var(--expense);
}

.grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
}

.section-title {
  font-size: 18px;
  margin-bottom: 16px;
}

.form__grid,
.filters__grid {
  display: grid;
  gap: 14px;
}

.form__field {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.form__field span {
  color: var(--muted);
}

.form__field input,
.form__field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--card-strong);
  color: var(--text);
  font-size: 14px;
  transition:
    border 0.2s ease,
    transform 0.2s ease;
}

.form__field input:focus,
.form__field select:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.7);
  transform: translateY(-1px);
}

.form__field--full {
  grid-column: 1 / -1;
}

.btn {
  cursor: pointer;
  padding: 12px 18px;
  border-radius: 14px;
  border: none;
  font-weight: 600;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.btn--primary {
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  color: #0f172a;
  box-shadow: 0 14px 30px rgba(56, 189, 248, 0.35);
}

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

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 30px rgba(15, 23, 42, 0.4);
}

.filters {
  display: grid;
  gap: 12px;
}

.transactions {
  display: grid;
  gap: 16px;
}

.transactions__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.transactions__meta {
  color: var(--muted);
  font-size: 14px;
}

.transactions__list {
  display: grid;
  gap: 12px;
}

.transactions__empty {
  text-align: center;
  color: var(--muted);
  padding: 30px 10px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: 14px;
}

.transaction {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition:
    transform 0.2s ease,
    background 0.2s ease;
}

.transaction:hover {
  transform: translateY(-2px);
  background: rgba(15, 23, 42, 0.55);
}

.transaction__title {
  font-weight: 600;
}

.transaction__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(56, 189, 248, 0.15);
  color: #bae6fd;
}

.amount {
  font-size: 16px;
  font-weight: 600;
  text-align: right;
}

.amount--income {
  color: var(--income);
}

.amount--expense {
  color: var(--expense);
}

.delete-btn {
  margin-top: 6px;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.delete-btn:hover {
  color: var(--expense);
}

.edit-btn {
  margin-top: 6px;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  margin-right: 8px;
}

.edit-btn:hover {
  color: var(--primary);
}

.form__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn--accent {
  background: linear-gradient(135deg, #d4af37, #f5d77a);
  color: #0f172a;
  box-shadow: 0 14px 30px rgba(212, 175, 55, 0.35);
}

.btn--danger {
  background: #ef4444;
  color: #0f172a;
}

.chart {
  display: grid;
  gap: 14px;
}

#financeChart {
  width: 100%;
  height: 260px;
  background: rgba(15, 23, 42, 0.35);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 6px;
}

.transactions__empty {
  display: grid;
  gap: 12px;
  text-align: center;
  color: var(--muted);
  padding: 30px 10px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  justify-items: center;
}

.empty__icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  color: var(--primary);
  font-size: 24px;
  font-weight: 700;
}

.month-group {
  display: grid;
  gap: 12px;
}

.month-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.modal.is-open {
  display: flex;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
}

.modal__content {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: min(90vw, 360px);
  box-shadow: var(--shadow);
  z-index: 1;
}

.modal__text {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: grid;
  gap: 10px;
  z-index: 60;
}

.toast {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
  color: var(--text);
  font-size: 14px;
  box-shadow: var(--shadow);
  animation: toast-in 0.2s ease;
}

.toast--error {
  border-color: rgba(239, 68, 68, 0.6);
}

.error {
  min-height: 16px;
  color: #f97316;
  font-size: 12px;
}

.is-invalid {
  border-color: rgba(249, 115, 22, 0.7);
}

.skeleton {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.95);
  display: grid;
  gap: 16px;
  padding: 40px;
  z-index: 80;
}

.skeleton.is-hidden {
  display: none;
}

.skeleton__block {
  height: 80px;
  border-radius: 14px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.18),
    rgba(255, 255, 255, 0.06)
  );
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

@keyframes toast-in {
  from {
    transform: translateY(8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

body.theme-light {
  --bg: #f8fafc;
  --bg-accent: #e2e8f0;
  --card: rgba(15, 23, 42, 0.04);
  --card-strong: rgba(15, 23, 42, 0.08);
  --text: #0f172a;
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.1);
  --primary: #1d4ed8;
  --shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
}

body.theme-light .bg-gradient {
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.06),
    rgba(29, 78, 216, 0.08)
  );
}

@media (max-width: 900px) {
  body {
    padding: 24px;
  }

  .app__header {
    flex-direction: column;
    align-items: flex-start;
  }

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

@media (max-width: 600px) {
  body {
    padding: 18px;
  }

  .transaction {
    grid-template-columns: 1fr;
  }

  .amount {
    text-align: left;
  }
}