/* =========================================================
   Expense Tracker App — style.css (Dark Theme)
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Dark backgrounds */
  --bg-page: #0A0E1A;
  --bg-card: #111827;
  --bg-card-hover: #1A2235;

  /* Text */
  --text-dark: #F0F4FF;
  --text-muted: #6B7DA8;

  /* Bold blue accent */
  --accent-blue: #3B82F6;
  --accent-blue-bright: #60A5FA;
  --accent-light: #1E3A5F;
  --accent-glow: rgba(59, 130, 246, 0.25);

  /* Income / Expense */
  --color-income: #10B981;
  --bg-income: #052E20;
  --color-expense: #F43F5E;
  --bg-expense: #2D0A14;

  /* Border */
  --border-light: #1E2D4A;
  --border-blue: #2563EB;

  --font-family: 'Outfit', sans-serif;
  --card-radius: 20px;
  --card-padding: 24px;
}

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

body {
  background-color: var(--bg-page);
  color: var(--text-dark);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  padding: 1.5rem;
  display: flex;
  justify-content: center;
  background-image: radial-gradient(circle, #1E2D4A 1px, transparent 1px);
  background-size: 28px 28px;
}

/* =========================================================
   UTILITAS AKSESIBILITAS
   ========================================================= */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =========================================================
   TRACKER APP — WRAPPER UTAMA
   ========================================================= */
.tracker-app {
  max-width: 1200px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.tracker-app main {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Kartu dasar */
.tracker-summary__balance,
.tracker-summary__stat,
.tracker-form-section__card,
.tracker-search,
.tracker-transaction-list {
  background: var(--bg-card);
  border-radius: var(--card-radius);
  border: 1px solid var(--border-light);
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* =========================================================
   TRACKER HEADER
   ========================================================= */
.tracker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
}

.tracker-header__title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-dark);
}

.tracker-header__user {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.tracker-header__user-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.tracker-header__greeting {
  font-size: 0.95rem;
  color: var(--text-dark);
}

.tracker-header__date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.tracker-header__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1E3A5F, #2563EB);
  border: 2px solid var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* =========================================================
   TRACKER SUMMARY — RINGKASAN SALDO
   ========================================================= */
.tracker-summary {
  display: grid;
  grid-template-columns: 2fr 1.25fr 1.25fr;
  gap: 1.5rem;
}

.tracker-summary__label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.tracker-summary__balance {
  background: linear-gradient(145deg, #0F1D36 0%, #1A2F5C 60%, #1E3A6E 100%);
  border: 1px solid var(--border-blue);
  box-shadow: 0 0 32px var(--accent-glow), inset 0 1px 0 rgba(96,165,250,0.1);
}

.tracker-summary__balance-amount {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  margin-top: auto;
  color: var(--accent-blue-bright);
  text-shadow: 0 0 24px rgba(96,165,250,0.4);
}

.tracker-summary__stat {
  border: 1px solid var(--border-light);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.tracker-summary__stat:hover {
  border-color: var(--border-blue);
  box-shadow: 0 0 16px var(--accent-glow);
}

.tracker-summary__stat-amount {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-top: auto;
}

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

/* =========================================================
   TRACKER FORM — INPUT TRANSAKSI BARU
   ========================================================= */
.tracker-form-section__card {
  border: 1px solid var(--border-light);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.tracker-form-section__heading {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-blue-bright);
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.tracker-form {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr auto;
  gap: 1rem;
  align-items: end;
}

.tracker-form__field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.tracker-form__label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.tracker-form__input {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background: #0D1526;
  color: var(--text-dark);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.tracker-form__input::placeholder {
  color: var(--text-muted);
}

.tracker-form__input:focus {
  border-color: var(--accent-blue);
  background: #0F1A2E;
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.tracker-form__input[type="date"],
.tracker-form__input[type="date"]::-webkit-calendar-picker-indicator {
  color-scheme: dark;
}

select.tracker-form__input option {
  background: #111827;
  color: var(--text-dark);
}

.tracker-form__submit {
  background: linear-gradient(135deg, #2563EB, #3B82F6);
  color: #fff;
  border: none;
  padding: 0.85rem 1.5rem;
  height: 44px;
  border-radius: 12px;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
  white-space: nowrap;
}

.tracker-form__submit:hover {
  box-shadow: 0 4px 24px rgba(59, 130, 246, 0.6);
  opacity: 0.92;
}

.tracker-form__submit:active { transform: scale(0.97); }

/* =========================================================
   TRACKER SEARCH — FORM PENCARIAN
   ========================================================= */
.tracker-history {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tracker-search {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-light);
}

.tracker-search__form {
  display: flex;
  gap: 1rem;
}

.tracker-search__form .tracker-form__input {
  flex: 1;
  background: #0D1526;
}

.tracker-search__submit {
  background: transparent;
  border: 1px solid var(--border-blue);
  color: var(--accent-blue-bright);
  padding: 0 1.5rem;
  border-radius: 12px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
}

.tracker-search__submit:hover {
  background: var(--accent-light);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* =========================================================
   TRACKER HISTORY — DAFTAR TRANSAKSI
   ========================================================= */
.tracker-history__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.tracker-transaction-list__header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.tracker-transaction-list__title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-blue-bright);
  letter-spacing: 0.08em;
}

.tracker-transaction-list__container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* =========================================================
   TRACKER TRANSACTION ITEM — KARTU TRANSAKSI
   ========================================================= */
.tracker-transaction-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-light);
  transition: background-color 0.15s;
}

.tracker-transaction-item:last-child { border-bottom: none; }

.tracker-transaction-item__icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.tracker-transaction-item__icon--income {
  background: var(--bg-income);
  color: var(--color-income);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tracker-transaction-item__icon--expense {
  background: var(--bg-expense);
  color: var(--color-expense);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.tracker-transaction-item__detail {
  flex: 1;
  min-width: 0;
}

.tracker-transaction-item__title {
  font-weight: 600;
  font-size: 1.05rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-dark);
}

.tracker-transaction-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.tracker-transaction-item__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
  flex-shrink: 0;
}

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

.tracker-transaction-item__amount--income { color: var(--color-income); }
.tracker-transaction-item__amount--expense { color: var(--color-expense); }

.tracker-transaction-item__actions {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tracker-transaction-item__btn {
  background: transparent;
  border: 1px solid var(--border-blue);
  color: var(--accent-blue-bright);
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  transition: background-color 0.15s, box-shadow 0.15s;
}

.tracker-transaction-item__btn:hover {
  background: var(--accent-light);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* =========================================================
   TRACKER FOOTER
   ========================================================= */
.tracker-footer {
  text-align: center;
  padding: 1.5rem 0 0.5rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 1rem;
  border-top: 1px solid var(--border-light);
}

/* =========================================================
   RESPONSIVE — TABLET (≤ 1024px)
   ========================================================= */
@media (max-width: 1024px) {
  .tracker-summary { grid-template-columns: 1fr 1fr; }
  .tracker-summary__balance { grid-column: span 2; }
  .tracker-form { grid-template-columns: 1fr 1fr; }
  .tracker-form__field:nth-child(1) { grid-column: span 2; }
  .tracker-form__submit { grid-column: span 2; }
  .tracker-history__grid { grid-template-columns: 1fr; }
}

/* =========================================================
   RESPONSIVE — MOBILE (≤ 768px)
   ========================================================= */
@media (max-width: 768px) {
  body { padding: 0.75rem; }
  .tracker-app, .tracker-app main { gap: 1rem; }
  .tracker-summary { grid-template-columns: 1fr; gap: 1rem; }
  .tracker-summary__balance,
  .tracker-summary__stat { grid-column: span 1; padding: 1.25rem; }
  .tracker-summary__balance-amount { font-size: 2.25rem; word-break: break-all; }
  .tracker-summary__stat-amount { font-size: 1.75rem; }
  .tracker-form-section__card { padding: 1.25rem; }
  .tracker-form { display: flex; flex-direction: column; align-items: stretch; gap: 1.25rem; }
  .tracker-form__submit { width: 100%; margin-top: 0.5rem; }
  .tracker-history__grid { grid-template-columns: 1fr; gap: 1rem; }
}

/* =========================================================
   RESPONSIVE — MOBILE KECIL (≤ 640px)
   ========================================================= */
@media (max-width: 640px) {
  .tracker-search__form { flex-direction: column; }
  .tracker-search__submit { width: 100%; padding: 0.85rem; }
  .tracker-transaction-item { flex-wrap: wrap; align-items: flex-start; }
  .tracker-transaction-item__right {
    width: 100%; flex-direction: column; align-items: stretch;
    margin-top: 0.5rem; gap: 0.75rem;
  }
  .tracker-transaction-item__amount { padding-left: 4rem; }
  .tracker-transaction-item__actions { width: 100%; }
  .tracker-transaction-item__btn {
    flex: 1; padding: 0.75rem 0; font-size: 0.85rem; font-weight: 500;
  }
}