/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0b0f1a;
  --surface:#131a2e;
  --surface2:#1a2340;
  --border:rgba(255,255,255,.08);
  --text:#e4e8f1;
  --text-dim:#8892a8;
  --blue:#4a9eff;
  --purple:#8b5cf6;
  --green:#34d399;
  --red:#f87171;
  --grad:linear-gradient(135deg,#4a9eff,#8b5cf6);
  --radius:14px;
  --shadow:0 8px 32px rgba(0,0,0,.45);
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased}

/* ===== HEADER ===== */
#app-header{text-align:center;padding:28px 16px 8px}
.header-inner{display:flex;align-items:center;justify-content:center;gap:10px}
.logo-icon{font-size:1.8rem}
#app-header h1{font-size:1.6rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.tagline{font-size:.78rem;color:var(--text-dim);margin-top:2px;letter-spacing:.3px}

/* ===== PROGRESS BAR ===== */
#progress-bar{padding:18px 24px 0;max-width:420px;margin:0 auto;width:100%}
.step-dots{display:flex;align-items:center;gap:0}
.dot{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;background:var(--surface2);color:var(--text-dim);border:2px solid var(--border);flex-shrink:0;transition:all .35s ease}
.dot.active{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 0 14px rgba(74,158,255,.45)}
.dot.done{background:var(--green);color:#fff;border-color:var(--green)}
.bar{flex:1;height:4px;background:var(--surface2);border-radius:4px;overflow:hidden}
.bar-fill{display:block;height:100%;width:0;background:var(--grad);border-radius:4px;transition:width .45s ease}
.step-labels{display:flex;justify-content:space-between;font-size:.65rem;color:var(--text-dim);margin-top:6px;padding:0 4px}

/* ===== WIZARD ===== */
#wizard{flex:1;max-width:520px;width:100%;margin:0 auto;padding:20px 16px 32px;position:relative}
.step{display:none;animation:fadeUp .4s ease both}
.step.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
.step h2{font-size:1.25rem;font-weight:700;margin-bottom:4px}
.step-desc{color:var(--text-dim);font-size:.82rem;margin-bottom:20px}

/* ===== PRODUCT CARDS ===== */
.product-cards{display:flex;flex-direction:column;gap:14px}
.product-card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);padding:22px 18px;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:4px;transition:all .25s ease;-webkit-tap-highlight-color:transparent}
.product-card:hover,.product-card:focus-visible{border-color:var(--blue);box-shadow:0 0 20px rgba(74,158,255,.18);transform:translateY(-2px)}
.product-card.selected{border-color:var(--blue);background:rgba(74,158,255,.08);box-shadow:0 0 24px rgba(74,158,255,.22)}
.card-icon{font-size:2rem}
.card-title{font-size:1.05rem;font-weight:700;margin-top:4px;color:#fff}
.card-sub{font-size:.75rem;color:rgba(255,255,255,0.65)}

/* ===== FORM ===== */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.input-group{display:flex;flex-direction:column;gap:4px}
.input-group label{font-size:.82rem;font-weight:600}
.input-hint{font-size:.7rem;color:var(--text-dim)}
input[type="number"]{background:var(--surface);border:1.5px solid var(--border);border-radius:10px;padding:12px 14px;color:var(--text);font-size:1rem;font-family:inherit;outline:none;width:100%;transition:border-color .2s}
input[type="number"]:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(74,158,255,.15)}
input[type="number"]::placeholder{color:var(--text-dim);opacity:.6}
/* hide spinners */
input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
input[type="number"]{-moz-appearance:textfield}

/* grade inputs */
.grade-inputs{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-height:50vh;overflow-y:auto;padding-right:4px;margin-bottom:16px}
.grade-inputs::-webkit-scrollbar{width:4px}
.grade-inputs::-webkit-scrollbar-thumb{background:var(--surface2);border-radius:4px}
.grade-input-item{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 12px;display:flex;flex-direction:column;gap:4px}
.grade-input-item label{font-size:.78rem;font-weight:600;color:var(--text-dim)}
.grade-input-item input{padding:8px 10px;font-size:.9rem}

/* ===== BUTTONS ===== */
.btn-row{display:flex;gap:10px;margin-top:20px}
.btn{flex:1;padding:14px;border-radius:12px;font-size:.9rem;font-weight:600;font-family:inherit;cursor:pointer;border:none;transition:all .2s ease;-webkit-tap-highlight-color:transparent}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 4px 18px rgba(74,158,255,.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 22px rgba(74,158,255,.4)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:var(--surface);color:var(--text-dim);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--text-dim)}

/* ===== RESULTS ===== */
.summary-cards{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}
.summary-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;display:flex;flex-direction:column;gap:2px}
.summary-card .sc-label{font-size:.7rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px;font-weight:600}
.summary-card .sc-value{font-size:1.3rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.result-section{margin-bottom:26px}
.result-section h3{font-size:1rem;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.section-hint{font-size:.74rem;color:var(--text-dim);margin-bottom:12px;line-height:1.4}
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:.78rem}
thead{background:var(--surface2)}
th{padding:10px 10px;text-align:left;font-weight:600;color:var(--text-dim);white-space:nowrap}
td{padding:9px 10px;border-top:1px solid var(--border)}
tbody tr:hover{background:rgba(74,158,255,.04)}
td:last-child,th:last-child{text-align:right}
.tool-note{font-size:.76rem;color:var(--text-dim);margin-bottom:8px;font-style:italic}
.missing-price{color:var(--red);font-weight:600}

/* grand total */
.grand-total-card{background:var(--grad);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:16px;margin:24px 0;box-shadow:var(--shadow)}
.gt-main{display:flex;justify-content:space-between;align-items:center}
.gt-label{font-size:1rem;font-weight:700;color:rgba(255,255,255,.9)}
.gt-value{font-size:1.8rem;font-weight:800;color:#fff}
.gt-budget{display:flex;justify-content:space-between;align-items:center;padding-top:14px;border-top:1px solid rgba(255,255,255,.15);font-size:.82rem}
.budget-label{color:rgba(255,255,255,.8);font-weight:500}
.budget-value{color:#fff;font-weight:700}
.budget-warning .budget-value{color:rgba(255,255,255,1);text-shadow:0 0 8px rgba(255,255,255,0.3)}

/* ===== FOOTER ===== */
footer{text-align:center;padding:16px;font-size:.68rem;color:var(--text-dim)}

/* ===== PRINT ===== */
@media print{
  body{background:#fff;color:#111}
  #progress-bar,.btn-row,footer,#app-header .logo-icon{display:none}
  #app-header h1{-webkit-text-fill-color:#111;color:#111}
  .tagline{color:#555}
  .step{display:none!important}
  #step4{display:block!important}
  .summary-card,.result-section,.table-wrap,table{border-color:#ccc}
  .summary-card{background:#f9f9f9}
  .summary-card .sc-value{-webkit-text-fill-color:#111;color:#111}
  .grand-total-card{background:#111;color:#fff}
  thead{background:#eee}
  td,th{color:#222}

  /* Inventory-only print mode: Hide price columns in component tables, but KEEP division columns */
  body.print-inventory-only .gt-budget,
  body.print-inventory-only .grand-total-card,
  body.print-inventory-only #component-table th:nth-last-child(-n+2),
  body.print-inventory-only #component-table td:nth-last-child(-n+2),
  body.print-inventory-only #additional-component-table th:nth-last-child(-n+2),
  body.print-inventory-only #additional-component-table td:nth-last-child(-n+2),
  body.print-inventory-only #surplus-component-table th:nth-last-child(-n+2),
  body.print-inventory-only #surplus-component-table td:nth-last-child(-n+2),
  body.print-inventory-only #tools-table th:nth-last-child(-n+2),
  body.print-inventory-only #tools-table td:nth-last-child(-n+2),
  body.print-inventory-only tr[style*="font-weight:700"] {
    display: none !important;
  }
}

/* ===== RESPONSIVE ===== */
@media(min-width:600px){
  .product-cards{flex-direction:row}
  .product-card{flex:1}
}