/* ── RESET & BASE ── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #0a0a0a;
  color: #ffffff;
  line-height: 1.6;
}

/* ── NAVBAR ── */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2.5rem;
  border-bottom: 1px solid #1f1f1f;
  position: sticky;
  top: 0;
  background-color: #0a0a0a;
  z-index: 100;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.logo span {
  color: #1D9E75;
}

.nav-btn {
  background: #1D9E75;
  color: #ffffff;
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s;
}

.nav-btn:hover {
  background: #0F6E56;
}

/* ── HERO ── */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  max-width: 750px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  color: #ffffff;
}

.hero p {
  font-size: 1.1rem;
  color: #888888;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-btn {
  display: inline-block;
  background: #1D9E75;
  color: #ffffff;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s;
}

.hero-btn:hover {
  background: #0F6E56;
}

/* ── CALCULATOR SECTION ── */
.calculator {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ── CALCULATOR BOX ── */
.calc-box {
  background: #111111;
  border: 1px solid #1f1f1f;
  border-radius: 16px;
  padding: 2rem;
}

.calc-box h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: #ffffff;
}

/* ── FIELDS ── */
.field {
  margin-bottom: 1.2rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  color: #888888;
  margin-bottom: 0.4rem;
}

.field select,
.field input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  color: #ffffff;
  font-size: 0.95rem;
  outline: none;
  transition: border 0.2s;
}

.field select:focus,
.field input:focus {
  border-color: #1D9E75;
}

.input-wrap {
  display: flex;
  align-items: center;
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  overflow: hidden;
  transition: border 0.2s;
}

.input-wrap:focus-within {
  border-color: #1D9E75;
}

.input-wrap span {
  padding: 0 0.85rem;
  color: #888888;
  font-size: 0.95rem;
  border-right: 1px solid #2a2a2a;
}

.input-wrap input {
  border: none;
  border-radius: 0;
  background: transparent;
  padding: 0.75rem 1rem;
}

/* ── BUTTON ── */
.calc-box button {
  width: 100%;
  padding: 0.85rem;
  background: #1D9E75;
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background 0.2s;
}

.calc-box button:hover {
  background: #0F6E56;
}

/* ── RESULT BOX ── */
.result-box {
  background: #111111;
  border: 1px solid #1f1f1f;
  border-radius: 16px;
  padding: 2rem;
  display: none;
}

.result-box.visible {
  display: block;
}

.result-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.result-label {
  font-size: 0.85rem;
  color: #888888;
  margin-bottom: 0.3rem;
}

.result-amount {
  font-size: 2.2rem;
  font-weight: 700;
  color: #1D9E75;
}

.result-pkr {
  font-size: 0.9rem;
  color: #888888;
  margin-top: 0.2rem;
}

.time-badge {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  color: #888888;
}

/* ── BREAKDOWN ── */
.breakdown {
  border-top: 1px solid #1f1f1f;
  padding-top: 1.2rem;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-size: 0.95rem;
  color: #cccccc;
}

.breakdown-row.deduction span:last-child {
  color: #E24B4A;
}

.breakdown-row.total {
  border-top: 1px solid #1f1f1f;
  margin-top: 0.5rem;
  padding-top: 0.8rem;
  font-weight: 600;
  font-size: 1rem;
  color: #ffffff;
}

.breakdown-row.total span:last-child {
  color: #1D9E75;
  font-size: 1.1rem;
}

/* ── TIP BOX ── */
.tip-box {
  margin-top: 1.2rem;
  background: #0d1f1a;
  border: 1px solid #1D9E75;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  font-size: 0.9rem;
  color: #1D9E75;
  display: none;
}

.tip-box.visible {
  display: block;
}

/* ── FOOTER ── */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid #1f1f1f;
  color: #444444;
  font-size: 0.85rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  nav {
    padding: 1rem 1.2rem;
  }

  .logo {
    font-size: 1.3rem;
  }

  .nav-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.9rem;
  }

  .hero {
    padding: 3rem 1.2rem 2.5rem;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-btn {
    width: 100%;
    text-align: center;
    padding: 0.85rem 1rem;
  }

  .calculator {
    padding: 1.5rem 1rem 3rem;
  }

  .calc-box {
    padding: 1.2rem;
  }

  .calc-box h2 {
    font-size: 1.1rem;
  }

  .calc-box button {
    font-size: 0.95rem;
  }

  .result-box {
    padding: 1.2rem;
  }

  .result-amount {
    font-size: 1.7rem;
  }

  .result-top {
    flex-direction: column;
    gap: 1rem;
  }

  .time-badge {
    width: fit-content;
  }

  .breakdown-row {
    font-size: 0.85rem;
  }
}