/* =============================================
   VARDHAMAN BROKERAGE CALCULATOR – STYLES
   ============================================= */

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

:root {
  --blue:       #1565C0;
  --blue-lt:    #E3F0FF;
  --blue-dk:    #0D47A1;
  --navy:       #0D2346;
  --navy-lt:    #122757;
  --maroon:     #7B1A1A;
  --charcoal:   #1E2D40;
  --dark-grey:  #2C3E50;
  --mid-grey:   #5A6A7A;
  --light-grey: #D0D8E4;
  --off-white:  #F4F7FB;
  --white:      #FFFFFF;
  --green:      #1DB954;
  --green-bg:   #E6F9EE;
  --red:        #E53935;
  --red-bg:     #FDECEA;
  --border:     #D0DBE8;
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --shadow-sm:  0 2px 8px rgba(10,31,60,0.08);
  --shadow-md:  0 4px 20px rgba(10,31,60,0.14);
  --font:       'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--off-white);
  color: var(--navy);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── HEADER ──────────────────────────────── */
.site-header {
  background: var(--navy);
  border-bottom: 4px solid var(--blue);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

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

.brand-logo-wrap {
  width: 54px;
  height: 54px;
  background: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 4px;
  box-shadow: 0 0 0 2px var(--maroon);
  overflow: hidden;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

.brand-text { display: flex; flex-direction: column; }

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: 0.3px;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--light-grey);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.header-tagline {
  font-size: 0.78rem;
  color: var(--light-grey);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: 1px solid rgba(255,255,255,0.18);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* ── MAIN ────────────────────────────────── */
.main-container {
  max-width: 1100px;
  width: 100%;
  margin: 28px auto;
  padding: 0 16px;
  flex: 1;
}

/* ── TABS ────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
  background: var(--white);
  padding: 6px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}

.tab-btn {
  flex: 1 1 120px;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--mid-grey);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}

.tab-btn:hover { background: var(--blue-lt); color: var(--blue-dk); }

.tab-btn.active {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(21,101,192,0.30);
}

/* ── PANELS ──────────────────────────────── */
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.25s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.panel-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 20px;
  align-items: start;
}

/* ── INPUT CARD ──────────────────────────── */
.input-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--blue);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title::before {
  content: '';
  display: inline-block;
  width: 4px; height: 18px;
  background: var(--blue);
  border-radius: 2px;
}

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--mid-grey);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.charge-type-group label {
  margin-bottom: 10px;
}

.radio-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--black);
  text-transform: none;
  cursor: pointer;
  margin: 0;
}

.radio-label input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  margin: 0;
  padding: 0;
  accent-color: var(--blue);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--black);
  background: var(--off-white);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  font-family: var(--font);
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(21,101,192,0.15);
  background: var(--white);
}

.form-group input.error { border-color: var(--red); box-shadow: 0 0 0 3px rgba(229,57,53,0.15); }

.input-hint-wrap { position: relative; }
.input-hint-wrap input { padding-right: 90px; }
.input-hint {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.72rem;
  color: var(--mid-grey);
  pointer-events: none;
  white-space: nowrap;
}

.form-group input::placeholder { color: #BABABA; }

.btn-row { display: flex; gap: 10px; margin-top: 20px; }

.btn-calc {
  flex: 1;
  padding: 12px;
  background: var(--blue);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
  letter-spacing: 0.3px;
}

.btn-calc:hover { background: var(--blue-dk); box-shadow: 0 4px 12px rgba(21,101,192,0.35); }
.btn-calc:active { transform: scale(0.98); }

.btn-reset {
  padding: 12px 18px;
  background: var(--off-white);
  color: var(--mid-grey);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-reset:hover { background: var(--light-grey); color: var(--black); }

/* ── RESULT CARD ─────────────────────────── */
.result-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  min-height: 300px;
}

.result-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 260px;
  color: var(--light-grey);
  font-size: 0.95rem;
  text-align: center;
  padding: 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
}

/* ── SUMMARY BOXES ───────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.summary-box {
  background: var(--off-white);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  text-align: center;
  border: 1px solid var(--border);
}

.summary-box.highlight {
  background: var(--blue-lt);
  border-color: var(--blue);
}

.summary-box.pnl-positive {
  background: var(--green-bg);
  border-color: var(--green);
}

.summary-box.pnl-negative {
  background: var(--red-bg);
  border-color: var(--red);
}

.summary-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--mid-grey);
  margin-bottom: 6px;
}

.summary-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--black);
}

.summary-box.pnl-positive .summary-value { color: var(--green); }
.summary-box.pnl-negative .summary-value { color: var(--red); }

/* ── CHARGES TABLE ───────────────────────── */
.charges-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--mid-grey);
  margin-bottom: 10px;
}

.charges-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.charges-table tr { border-bottom: 1px solid var(--border); }
.charges-table tr:last-child { border-bottom: none; }

.charges-table td {
  padding: 8px 6px;
  color: var(--dark-grey);
  vertical-align: middle;
}

.charges-table td:first-child { font-weight: 500; }
.charges-table td:last-child { text-align: right; font-weight: 600; color: var(--black); font-variant-numeric: tabular-nums; }

.charges-table .row-total td {
  background: var(--off-white);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--navy);
  border-top: 2px solid var(--blue);
  border-bottom: none;
}

.charges-table .row-total td:last-child { color: var(--red); }

.result-section-divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

/* ── BREAKEVEN BADGE ─────────────────────── */
.breakeven-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--blue-lt);
  border: 1px solid var(--blue);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-top: 14px;
}

.breakeven-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.breakeven-value {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--blue-dk);
}

/* ── ERROR MSG ───────────────────────────── */
.error-msg {
  background: var(--red-bg);
  border: 1px solid var(--red);
  border-radius: var(--radius-sm);
  color: var(--red);
  padding: 12px 16px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* ── DISCLAIMER ──────────────────────────── */
.disclaimer {
  background: var(--navy);
  color: var(--light-grey);
  padding: 18px 20px;
  margin-top: auto;
}

.disclaimer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.8rem;
  line-height: 1.6;
}

.disclaimer-icon {
  font-size: 1rem;
  color: #5BA4F5;
  flex-shrink: 0;
  margin-top: 1px;
}

.disclaimer p strong { color: #5BA4F5; }

/* ── RESPONSIVE ──────────────────────────── */
@media (max-width: 760px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .brand-name { font-size: 1rem; }
  .header-tagline { display: none; }

  .tab-btn { font-size: 0.8rem; padding: 8px 10px; }

  .main-container { margin: 16px auto; }
}

@media (max-width: 420px) {
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .brand-logo-wrap { width: 40px; height: 40px; }

}