/* ════════════════════════════════════════════════
   W-4 Calculator USA — Styles v1.0
   All classes prefixed .w4c- to avoid conflicts
════════════════════════════════════════════════ */

:root {
  --w4-navy:    #0a2e5c;
  --w4-blue:    #1a56db;
  --w4-green:   #059669;
  --w4-gold:    #d97706;
  --w4-red:     #dc2626;
  --w4-bg:      #f0f5fb;
  --w4-bg2:     #e8eef7;
  --w4-border:  #d1dce8;
  --w4-text:    #1a2332;
  --w4-text2:   #4a5a6e;
  --w4-text3:   #8a9bb0;
  --w4-radius:  10px;
  --w4-shadow:  0 6px 32px rgba(10,46,92,0.13);
}

/* ── Outer wrapper ── */
.w4c-wrap-outer {
  font-family: -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: #fff;
  border-radius: var(--w4-radius);
  box-shadow: var(--w4-shadow);
  border: 1.5px solid var(--w4-border);
  overflow: hidden;
  margin: 1.5rem 0;
}

/* ── Header ── */
.w4c-header {
  background: linear-gradient(135deg, var(--w4-navy), var(--w4-blue));
  padding: 1.4rem 1.8rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.w4c-header-icon {
  width: 46px; height: 46px;
  background: rgba(255,255,255,.12);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
}
.w4c-header-title { font-size: 1.15rem; font-weight: 700; color: #fff; margin: 0 0 .2rem; }
.w4c-header-sub   { font-size: .72rem; color: rgba(255,255,255,.55); margin: 0 0 .5rem; }
.w4c-badges { display: flex; gap: .35rem; flex-wrap: wrap; margin-top: .4rem; }
.w4c-badge  { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25); color: rgba(255,255,255,.85); font-size: .58rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; padding: .15rem .45rem; border-radius: 3px; }

/* ── Progress Bar ── */
.w4c-progress {
  display: flex;
  align-items: center;
  padding: 1rem 1.8rem;
  background: var(--w4-bg);
  border-bottom: 1.5px solid var(--w4-border);
  overflow-x: auto;
  gap: 0;
}
.w4c-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
  cursor: default;
  flex-shrink: 0;
}
.w4c-step-num {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--w4-bg2);
  border: 2px solid var(--w4-border);
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem; font-weight: 700; color: var(--w4-text3);
  transition: all .2s;
}
.w4c-step.active   .w4c-step-num { background: var(--w4-navy); border-color: var(--w4-navy); color: #fff; }
.w4c-step.complete .w4c-step-num { background: var(--w4-green); border-color: var(--w4-green); color: #fff; }
.w4c-step-lbl { font-size: .58rem; color: var(--w4-text3); margin-top: .25rem; text-align: center; max-width: 56px; line-height: 1.3; }
.w4c-step.active   .w4c-step-lbl { color: var(--w4-navy); font-weight: 700; }
.w4c-step.complete .w4c-step-lbl { color: var(--w4-green); }
.w4c-step-line { flex: 1; height: 2px; background: var(--w4-border); min-width: 12px; margin-bottom: 16px; }

/* ── Body Layout ── */
.w4c-body {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 0;
}
.w4c-form-col {
  padding: 1.6rem 1.8rem;
  border-right: 1.5px solid var(--w4-border);
}
.w4c-results-col {
  padding: 1.4rem;
  background: var(--w4-bg);
  position: sticky;
  top: 60px;
  align-self: start;
}

/* ── Cards ── */
.w4c-card {
  background: #fff;
  border: 1.5px solid var(--w4-border);
  border-radius: var(--w4-radius);
  overflow: hidden;
  margin-bottom: 1.1rem;
}
.w4c-card-head {
  background: var(--w4-bg);
  padding: .65rem 1.1rem;
  font-size: .78rem;
  font-weight: 700;
  color: var(--w4-navy);
  border-bottom: 1.5px solid var(--w4-border);
  display: flex;
  align-items: center;
  gap: .4rem;
}
.w4c-card-num {
  width: 20px; height: 20px;
  background: var(--w4-navy);
  color: #fff;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: .65rem; font-weight: 800; flex-shrink: 0;
}
.w4c-card-sub { font-weight: 400; color: var(--w4-text3); font-size: .7rem; }
.w4c-card-body { padding: 1.1rem; }

/* ── Fields ── */
.w4c-field { margin-bottom: .85rem; }
.w4c-field:last-child { margin-bottom: 0; }
.w4c-field label { display: block; font-size: .73rem; font-weight: 700; color: var(--w4-text); margin-bottom: .3rem; }
.w4c-req { color: var(--w4-red); }
.w4c-hint { display: block; font-size: .62rem; color: var(--w4-text3); margin-top: .18rem; }
.w4c-g2 { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }

.w4c-inp-wrap { position: relative; }
.w4c-prefix-dollar::before { content: '$'; position: absolute; left: .75rem; top: 50%; transform: translateY(-50%); color: var(--w4-navy); font-weight: 700; font-size: .9rem; z-index: 1; pointer-events: none; }
.w4c-inp-wrap input[type=number] { width: 100%; padding: .6rem .75rem .6rem 1.6rem; border: 1.5px solid var(--w4-border); border-radius: 8px; font-size: .9rem; color: var(--w4-text); background: var(--w4-bg); transition: border .15s, box-shadow .15s; box-sizing: border-box; }
.w4c-inp-wrap input:focus { outline: none; border-color: var(--w4-navy); background: #fff; box-shadow: 0 0 0 3px rgba(10,46,92,.1); }
.w4c-plain-inp { width: 100%; padding: .6rem .75rem; border: 1.5px solid var(--w4-border); border-radius: 8px; font-size: .9rem; color: var(--w4-text); background: var(--w4-bg); box-sizing: border-box; }
.w4c-plain-inp:focus { outline: none; border-color: var(--w4-navy); background: #fff; box-shadow: 0 0 0 3px rgba(10,46,92,.1); }
.w4c-sel-wrap { position: relative; }
.w4c-sel-wrap select { width: 100%; padding: .6rem .75rem; border: 1.5px solid var(--w4-border); border-radius: 8px; font-size: .88rem; color: var(--w4-text); background: var(--w4-bg); appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7'%3E%3Cpath fill='%230a2e5c' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .8rem center; }
.w4c-sel-wrap select:focus { outline: none; border-color: var(--w4-navy); background-color: #fff; }

/* ── OBBBA Box ── */
.w4c-obbba-box {
  background: linear-gradient(135deg, rgba(5,150,105,.05), rgba(10,46,92,.04));
  border: 1.5px solid rgba(5,150,105,.3);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin-bottom: .8rem;
}
.w4c-obbba-title { font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--w4-green); margin-bottom: .3rem; }
.w4c-obbba-desc  { font-size: .73rem; color: var(--w4-text2); line-height: 1.55; margin-bottom: .75rem; }
.w4c-info-box    { background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 6px; padding: .65rem .85rem; font-size: .73rem; color: #1e40af; line-height: 1.55; margin-bottom: .8rem; }

/* ── Calc Button ── */
.w4c-btn-calc {
  width: 100%; padding: .95rem;
  background: linear-gradient(135deg, var(--w4-navy), var(--w4-blue));
  color: #fff; border: none; border-radius: 10px;
  font-size: 1.05rem; font-weight: 700; cursor: pointer;
  transition: transform .12s, box-shadow .15s;
  box-shadow: 0 4px 18px rgba(10,46,92,.28);
  display: flex; align-items: center; justify-content: center; gap: .5rem;
  margin-top: .6rem;
}
.w4c-btn-calc:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(10,46,92,.38); }

/* ── Results ── */
.w4c-empty-state { text-align: center; padding: 2rem 1rem; }
.w4c-empty-icon  { font-size: 2.5rem; opacity: .2; margin-bottom: .8rem; }
.w4c-empty-state p { font-size: .78rem; color: var(--w4-text3); line-height: 1.65; }

.w4c-res-hero {
  background: linear-gradient(160deg, var(--w4-navy), #0d4a9e);
  border-radius: var(--w4-radius);
  padding: 1.3rem;
  margin-bottom: .8rem;
  position: relative; overflow: hidden;
}
.w4c-res-hero::before { content:''; position:absolute; inset:0; background:repeating-linear-gradient(45deg,transparent,transparent 14px,rgba(255,255,255,.02) 14px,rgba(255,255,255,.02) 15px); }
.w4c-res-hero-label  { font-size: .6rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: rgba(5,206,145,.8); margin-bottom: .3rem; position: relative; z-index: 1; }
.w4c-res-hero-amount { font-size: 2.4rem; font-weight: 800; color: #fff; line-height: 1; position: relative; z-index: 1; }
.w4c-res-hero-sub    { font-size: .67rem; color: rgba(255,255,255,.42); margin-top: .28rem; position: relative; z-index: 1; }

.w4c-status-banner {
  border: 1.5px solid;
  border-radius: 8px;
  padding: .7rem .9rem;
  margin-bottom: .8rem;
  font-size: .78rem;
  font-weight: 600;
  display: flex;
  gap: .6rem;
  align-items: flex-start;
  line-height: 1.5;
}

.w4c-res-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .45rem; margin-bottom: .8rem; }
.w4c-res-cell { background: #fff; border: 1px solid var(--w4-border); border-radius: 7px; padding: .65rem; text-align: center; }
.w4c-res-cell-val { font-size: 1.05rem; font-weight: 700; display: block; }
.w4c-res-cell-val.green { color: var(--w4-green); }
.w4c-res-cell-val.red   { color: var(--w4-red); }
.w4c-res-cell-lbl { font-size: .56rem; color: var(--w4-text3); text-transform: uppercase; letter-spacing: .07em; margin-top: .12rem; display: block; }

/* ── W-4 Instructions ── */
.w4c-w4-instructions { background: #f0fdf4; border: 1.5px solid #a7f3d0; border-radius: 8px; padding: .9rem; margin-bottom: .8rem; }
.w4c-w4-ins-title    { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--w4-green); margin-bottom: .55rem; }
.w4c-ins-table       { width: 100%; border-collapse: collapse; font-size: .74rem; }
.w4c-ins-table th    { background: rgba(10,46,92,.08); color: var(--w4-navy); padding: .35rem .55rem; text-align: left; font-size: .6rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.w4c-ins-table td    { padding: .4rem .55rem; border-bottom: 1px solid #d1fae5; vertical-align: top; }
.w4c-ins-table tr:last-child td { border-bottom: none; }
.w4c-obbba-note { margin-top: .55rem; font-size: .72rem; color: #065f46; background: #d1fae5; border-radius: 5px; padding: .5rem .7rem; line-height: 1.55; }

/* ── Rate Bar ── */
.w4c-rate-wrap  { margin-bottom: .75rem; }
.w4c-rate-lbl   { display: flex; justify-content: space-between; font-size: .72rem; color: var(--w4-text2); margin-bottom: .28rem; }
.w4c-rate-lbl strong { color: var(--w4-navy); font-weight: 700; }
.w4c-rate-track { height: 7px; background: var(--w4-bg2); border-radius: 99px; overflow: hidden; }
.w4c-rate-fill  { height: 100%; background: linear-gradient(90deg, var(--w4-green), var(--w4-blue)); border-radius: 99px; transition: width .7s cubic-bezier(.4,0,.2,1); }

/* ── View Tabs ── */
.w4c-view-tabs { display: flex; border: 1.5px solid var(--w4-border); border-radius: 7px; overflow: hidden; margin-bottom: .7rem; }
.w4c-vtab { flex: 1; padding: .38rem; background: var(--w4-bg); border: none; font-size: .65rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--w4-text3); cursor: pointer; transition: all .13s; }
.w4c-vtab:last-child { border-left: 1px solid var(--w4-border); }
.w4c-vtab.active { background: var(--w4-navy); color: #fff; }

/* ── Breakdown Table ── */
.w4c-bk-table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.w4c-bk-table th { background: var(--w4-navy); color: #fff; font-size: .6rem; letter-spacing: .1em; text-transform: uppercase; padding: .42rem .75rem; text-align: left; }
.w4c-bk-table th:last-child { text-align: right; }
.w4c-bk-table td { padding: .5rem .75rem; border-bottom: 1px solid var(--w4-bg2); }
.w4c-bk-table td:last-child { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.w4c-bk-table tr:hover td { background: #f8fafc; }
.w4c-sec-row td { background: var(--w4-bg) !important; font-size: .58rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--w4-navy); padding: .28rem .75rem; }
.w4c-total-row td { background: #f0fdf4 !important; font-weight: 700; }
.w4c-sub-text { font-size: .6rem; color: var(--w4-text3); margin-top: .05rem; }
.w4c-neg  { color: var(--w4-red); }
.w4c-pos  { color: var(--w4-green); }

/* ── Print / Reset ── */
.w4c-print-row { display: flex; gap: .5rem; padding-top: .55rem; border-top: 1px solid var(--w4-border); margin-top: .4rem; }
.w4c-btn-sm { flex: 1; padding: .4rem; border: 1.5px solid var(--w4-border); border-radius: 7px; background: #fff; font-size: .65rem; font-weight: 600; color: var(--w4-text2); cursor: pointer; transition: all .13s; }
.w4c-btn-sm:hover { border-color: var(--w4-navy); color: var(--w4-navy); background: var(--w4-bg); }

/* ── Reference Table ── */
.w4c-table-section { margin: 2rem 0; }
.w4c-table-h   { font-size: 1.25rem; font-weight: 700; color: var(--w4-navy); margin-bottom: .35rem; }
.w4c-table-sub { font-size: .82rem; color: var(--w4-text2); margin-bottom: 1rem; }
.w4c-ref-table { width: 100%; border-collapse: collapse; font-size: .8rem; box-shadow: var(--w4-shadow); border-radius: var(--w4-radius); overflow: hidden; }
.w4c-ref-table thead th { background: var(--w4-navy); color: #fff; padding: .55rem .85rem; text-align: left; font-size: .62rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; }
.w4c-ref-table tbody td { padding: .52rem .85rem; border-bottom: 1px solid var(--w4-bg2); white-space: nowrap; }
.w4c-ref-table tbody tr:hover td { background: #eff6ff; }
.w4c-ref-table tbody tr:last-child td { border-bottom: none; }
.w4c-ref-table .w4c-neg { color: var(--w4-red); }
.w4c-ref-table .w4c-pos { color: var(--w4-green); font-weight: 600; }

/* ── Guide Section ── */
.w4c-guide-section { margin: 2.5rem 0; }
.w4c-guide-h { font-size: 1.3rem; font-weight: 700; color: var(--w4-navy); margin-bottom: .4rem; }
.w4c-guide-intro { font-size: .88rem; color: var(--w4-text2); line-height: 1.7; margin-bottom: 1.5rem; }
.w4c-guide-steps { display: flex; flex-direction: column; gap: 1.1rem; margin-bottom: 2rem; }
.w4c-guide-step { display: flex; gap: 1rem; background: #fff; border: 1.5px solid var(--w4-border); border-radius: var(--w4-radius); padding: 1.1rem; }
.w4c-guide-step-num { min-width: 80px; font-size: .75rem; font-weight: 700; color: var(--w4-navy); text-align: center; padding-top: .2rem; }
.w4c-guide-icon { font-size: 1.5rem; display: block; margin-bottom: .3rem; }
.w4c-guide-step-body h4 { font-size: .92rem; font-weight: 700; color: var(--w4-navy); margin: 0 0 .4rem; }
.w4c-guide-step-body p  { font-size: .82rem; color: var(--w4-text2); line-height: 1.7; margin: 0 0 .5rem; }
.w4c-guide-tip { background: #fffbeb; border-left: 3px solid var(--w4-gold); padding: .5rem .75rem; font-size: .78rem; color: #78350f; line-height: 1.55; border-radius: 0 6px 6px 0; }

/* ── FAQ ── */
.w4c-guide-faq { background: var(--w4-bg); border-radius: var(--w4-radius); padding: 1.4rem; }
.w4c-guide-faq h4 { font-size: 1rem; font-weight: 700; color: var(--w4-navy); margin: 0 0 1rem; }
.w4c-faq-item { margin-bottom: .9rem; padding-bottom: .9rem; border-bottom: 1px solid var(--w4-border); }
.w4c-faq-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.w4c-faq-q { font-size: .85rem; font-weight: 700; color: var(--w4-navy); margin-bottom: .3rem; }
.w4c-faq-a { font-size: .82rem; color: var(--w4-text2); line-height: 1.65; }

/* ── Ad slot ── */
.w4c-ad-slot { margin: 1.5rem 0; text-align: center; }

/* ── Print ── */
@media print {
  .w4c-btn-calc, .w4c-print-row, .w4c-progress, .w4c-form-col { display: none !important; }
  .w4c-body { grid-template-columns: 1fr !important; }
  .w4c-results-col { position: static !important; background: #fff !important; }
}

/* ── Responsive ── */
@media (max-width: 860px) {
  .w4c-body { grid-template-columns: 1fr; }
  .w4c-form-col { border-right: none; border-bottom: 1.5px solid var(--w4-border); }
  .w4c-results-col { position: static; }
}
@media (max-width: 520px) {
  .w4c-g2 { grid-template-columns: 1fr; }
  .w4c-res-grid { grid-template-columns: 1fr 1fr; }
  .w4c-header { padding: 1rem; }
  .w4c-form-col { padding: 1.1rem; }
  .w4c-progress { padding: .8rem 1rem; }
}