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

:root {
  --primary: #6c63ff;
  --secondary: #8f94fb;
  --bg: #0f172a;
  --card: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.15);
  --text: #ffffff;
  --light: rgba(255,255,255,0.7);
  --income: #22c55e;
  --expense: #ef4444;
  --shadow: 0 10px 35px rgba(0,0,0,0.35);
}

body {
  font-family: 'Poppins', sans-serif;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a, #111827, #1e1b4b);
  overflow-x: hidden;
  color: var(--text);
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 20px;
}

body::before,
body::after {
  content: "";
  position: absolute;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  filter: blur(80px);
  opacity: 0.35;
  animation: float 8s ease-in-out infinite alternate;
  z-index: 0;
}

body::before {
  top: -80px;
  left: -80px;
}

body::after {
  bottom: -80px;
  right: -80px;
  animation-delay: 3s;
}

@keyframes float {
  from {
    transform: translateY(0px) translateX(0px) scale(1);
  }

  to {
    transform: translateY(30px) translateX(20px) scale(1.1);
  }
}

.container {
  width: 100%;
  max-width: 1150px;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 30px;
  position: relative;
  z-index: 1;
}

.card {
  background: var(--card);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 30px;
  animation: fadeUp 1s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(90deg, #fff, #b8c1ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--light);
  margin-bottom: 30px;
  font-size: 0.95rem;
}

.balance-box {
  background: linear-gradient(
    135deg,
    rgba(108,99,255,0.35),
    rgba(143,148,251,0.25)
  );

  border-radius: 24px;
  padding: 30px;
  text-align: center;
  margin-bottom: 28px;
  border: 1px solid rgba(255,255,255,0.1);
  position: relative;
  overflow: hidden;
}

.balance-box::before {
  content: "";
  position: absolute;
  inset: 0;

  background: linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.15),
    transparent
  );

  transform: translateX(-100%);
  animation: shine 4s infinite;
}

@keyframes shine {
  100% {
    transform: translateX(100%);
  }
}

.balance-label {
  color: rgba(255,255,255,0.7);
  margin-bottom: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-size: 0.9rem;
}

.balance {
  font-size: 3rem;
  font-weight: 700;
}

.summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 30px;
}

.summary-card {
  padding: 22px;
  border-radius: 20px;
  position: relative;
  overflow: hidden;
  transition: 0.4s;
}

.summary-card:hover {
  transform: translateY(-6px) scale(1.02);
}

.income-card {
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.25);
}

.expense-card {
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.25);
}

.summary-title {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 10px;
}

.summary-amount {
  font-size: 1.8rem;
  font-weight: 700;
}

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

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

form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.8);
}

input,
select {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 15px 16px;
  color: white;
  font-size: 1rem;
  outline: none;
  transition: 0.3s ease;
}

input:focus,
select:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 18px rgba(143,148,251,0.4);
  transform: scale(1.01);
}

select option {
  background: #111827;
}

.btn {
  padding: 15px;
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;

  background: linear-gradient(
    135deg,
    var(--primary),
    var(--secondary)
  );

  color: white;
  transition: 0.35s ease;
  margin-top: 8px;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(108,99,255,0.4);
}

.btn:active {
  transform: scale(0.98);
}

.right-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.history-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.clear-btn {
  border: none;
  background: rgba(239,68,68,0.15);
  color: #ff7b7b;
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.3s;
  font-weight: 500;
}

.clear-btn:hover {
  background: rgba(239,68,68,0.25);
  transform: scale(1.05);
}

.transaction-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: 650px;
  overflow-y: auto;
  padding-right: 5px;
}

.transaction-list::-webkit-scrollbar {
  width: 6px;
}

.transaction-list::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2);
  border-radius: 10px;
}

.transaction {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 18px 20px;

  display: flex;
  justify-content: space-between;
  align-items: center;

  transition: 0.35s ease;
  animation: slideIn 0.5s ease;
  position: relative;
  overflow: hidden;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(50px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.transaction:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.09);
}

.transaction::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
}

.transaction.income::before {
  background: var(--income);
}

.transaction.expense::before {
  background: var(--expense);
}

.transaction-left h4 {
  font-size: 1rem;
  margin-bottom: 5px;
}

.transaction-left p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

.transaction-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.transaction-amount {
  font-weight: 700;
  font-size: 1.1rem;
}

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

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

.delete-btn {
  border: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  background: rgba(255,255,255,0.08);
  color: white;
  font-size: 1rem;
  transition: 0.3s;
}

.delete-btn:hover {
  background: rgba(239,68,68,0.3);
  transform: rotate(90deg);
}

.empty {
  text-align: center;
  padding: 80px 20px;
  color: rgba(255,255,255,0.6);
  border: 2px dashed rgba(255,255,255,0.12);
  border-radius: 20px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.01);
  }

  100% {
    transform: scale(1);
  }
}

@media (max-width: 980px) {
  .container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {

  .card {
    padding: 22px;
  }

  .title {
    font-size: 1.7rem;
  }

  .balance {
    font-size: 2.3rem;
  }

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

  .transaction {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }

  .transaction-right {
    width: 100%;
    justify-content: space-between;
  }
}