:root{
    /* Switch About renk paleti */
    --ink:#111111; --ink-2:#444444; --paper:#f6f6f4; --card:#ffffff;
    --line:#ebebeb; --line-strong:#b0b0b0; --muted:#b0b0b0;
    --accent:#3a5fa0; --accent-deep:#1a2b4a; --accent-soft:#e8edf5;
    --wood:#DBA257; --wood-edge:#C0843A; --approach:#EFE7D6; --pin:#1a2b4a; --margin:#E9E4D9;
    --ok:#2E7D52; --ok-soft:#E5F1EA; --warn:#9A6B0E; --warn-soft:#FAEFD5; --danger:#B23A2C; --danger-soft:#F6E4E1;
    --navy:#1a2b4a; --navy-mid:#243660; --navy-light:#2d4580; --navy-pale:#e8edf5;
    --accent-blue:#3a5fa0; --accent-line:#c6d4e8;
    --r:10px; --r-lg:16px;
  }
  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0; background:var(--paper); color:var(--ink);
    font-family:"Oswald",system-ui,sans-serif; font-weight:300; line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  .wrap{max-width:1120px; margin:0 auto; padding:0 20px}

  header.top{margin-top:50px; padding:26px 0 14px; border-bottom:1px solid var(--line); background:var(--navy)}
  .top-row{display:flex; align-items:baseline; justify-content:space-between; gap:16px; flex-wrap:wrap}
  .brand{font-family:"Oswald",sans-serif; font-weight:700; letter-spacing:.2em; text-transform:uppercase; font-size:15px; color:#fff}
  .brand b{color:var(--accent-line)}
  .top-note{font-size:12px; color:rgba(255,255,255,0.45); letter-spacing:.04em; text-transform:uppercase}
  h1.hero{font-family:"Oswald",sans-serif; font-weight:700; text-transform:uppercase; letter-spacing:-.02em;
    font-size:clamp(30px,5vw,52px); line-height:.98; margin:22px 0 8px; color:#fff}
  .hero-sub{max-width:620px; color:rgba(255,255,255,0.65); font-size:16px; margin:0 0 26px; font-family:"Source Serif 4",serif; font-style:italic; font-weight:300}

  /* Layout */
  .layout{display:grid; grid-template-columns:248px 1fr; gap:34px; align-items:start; padding:8px 0 60px}

  /* Stepper rail */
  .rail{position:sticky; top:18px}
  .rail ol{list-style:none; margin:0; padding:0}
  .rail li{display:flex; gap:13px; align-items:flex-start; padding:11px 0; cursor:default; color:var(--muted)}
  .rail li .dot{flex:0 0 auto; width:30px; height:30px; border-radius:50%; border:1.5px solid var(--line-strong);
    display:grid; place-items:center; font-family:"Oswald",sans-serif; font-weight:600; font-size:14px; background:var(--card); transition:all .2s}
  .rail li .lab{font-family:"Oswald",sans-serif; font-weight:500; text-transform:uppercase; letter-spacing:.04em; font-size:14px; padding-top:4px}
  .rail li .lab small{display:block; font-family:"Inter",sans-serif; font-weight:400; text-transform:none; letter-spacing:0; font-size:12px; color:var(--muted)}
  .rail li.done{color:var(--ink); cursor:pointer}
  .rail li.done .dot{border-color:var(--navy); background:var(--navy); color:#fff}
  .rail li.active{color:var(--ink)}
  .rail li.active .dot{border-color:var(--accent-blue); background:var(--accent-blue); color:#fff; box-shadow:0 0 0 4px var(--navy-pale)}

  /* Mobile progress */
  .mprogress{display:none}

  /* Panel */
  .panel{background:var(--card); border:1px solid var(--line); border-radius:var(--r-lg); padding:30px 32px; min-height:440px;
    display:flex; flex-direction:column}
  .step-kicker{font-family:"Oswald",sans-serif; font-weight:400; text-transform:uppercase; letter-spacing:.2em; font-size:10px; color:var(--accent-blue)}
  .panel h2{font-family:"Oswald",sans-serif; font-weight:700; text-transform:uppercase; letter-spacing:-.01em; font-size:27px; margin:4px 0 4px}
  .panel .lead{color:var(--ink-2); margin:0 0 22px; font-size:15px; font-family:"Source Serif 4",serif; font-style:italic; font-weight:300}
  .panel-body{flex:1}

  /* Fields */
  .grid2{display:grid; grid-template-columns:1fr 1fr; gap:16px}
  .field{display:flex; flex-direction:column; gap:6px; margin-bottom:16px}
  .field.full{grid-column:1 / -1}
  label.lbl{font-family:"Oswald",sans-serif; font-weight:400; text-transform:uppercase; letter-spacing:.1em; font-size:11px; color:var(--dark-gray,#444)}
  label.lbl .req{color:var(--accent-blue)}
  .hint{font-size:12px; color:var(--muted)}
  input[type=text], input[type=email], input[type=tel], input[type=number], input[type=url], select{
    font-family:"Oswald",sans-serif; font-size:14px; font-weight:300; color:var(--ink); background:#fff;
    border:1px solid var(--line-strong); border-radius:var(--r); padding:11px 13px; width:100%; transition:border-color .15s, box-shadow .15s}
  input:focus, select:focus{outline:none; border-color:var(--accent-blue); box-shadow:0 0 0 3px var(--navy-pale)}
  input.invalid{border-color:var(--danger); box-shadow:0 0 0 3px var(--danger-soft)}
  .err{font-size:12px; color:var(--danger); min-height:0}

  /* Chip group (radio-like) */
  .chips{display:flex; flex-wrap:wrap; gap:9px}
  .chip{font-family:"Oswald",sans-serif; font-size:12px; font-weight:400; letter-spacing:.08em; text-transform:uppercase; border:1px solid var(--line-strong); background:#fff; color:var(--ink-2);
    border-radius:999px; padding:8px 16px; cursor:pointer; transition:all .15s}
  .chip:hover{border-color:var(--navy)}
  .chip[aria-pressed="true"]{background:var(--navy); border-color:var(--navy); color:#fff}
  .chip:focus-visible{outline:2px solid var(--accent-blue); outline-offset:2px}

  /* Cards (concept / location) */
  .cards{display:grid; grid-template-columns:1fr 1fr; gap:12px}
  .selcard{text-align:left; font-family:"Oswald",sans-serif; border:1px solid var(--line-strong); background:#fff; border-radius:var(--r);
    padding:15px 16px; cursor:pointer; transition:all .15s; display:flex; flex-direction:column; gap:4px}
  .selcard:hover{border-color:var(--navy)}
  .selcard .t{font-family:"Oswald",sans-serif; font-weight:600; text-transform:uppercase; letter-spacing:.06em; font-size:13px}
  .selcard .d{font-size:12px; color:var(--muted); line-height:1.4; font-family:"Source Serif 4",serif; font-weight:300; font-style:italic; text-transform:none; letter-spacing:0}
  .selcard[aria-pressed="true"]{border-color:var(--accent-blue); background:var(--navy-pale); box-shadow:inset 0 0 0 1px var(--accent-blue)}
  .selcard[aria-pressed="true"] .t{color:var(--navy)}
  .selcard:focus-visible{outline:2px solid var(--accent-blue); outline-offset:2px}

  /* Step 2 — calc + viz */
  .calc-grid{display:grid; grid-template-columns:1fr 1.15fr; gap:26px; align-items:start}
  .readout{background:var(--navy); color:#fff; border-radius:var(--r-lg); padding:20px 22px; margin-top:4px}
  .readout .big{font-family:"Oswald",sans-serif; font-weight:700; font-size:54px; line-height:1; letter-spacing:-.02em}
  .readout .big.dim{color:rgba(255,255,255,0.35)}
  .readout .biglab{font-family:"Oswald",sans-serif; text-transform:uppercase; letter-spacing:.12em; font-size:10px; color:var(--accent-line); margin-top:2px}
  .readout .pairnote{font-size:12px; color:rgba(255,255,255,0.5); margin-top:8px; font-family:"Source Serif 4",serif; font-style:italic; font-weight:300}
  .slider-row{margin-top:18px}
  .slider-row .srhead{display:flex; justify-content:space-between; align-items:baseline}
  .slider-row .srhead .v{font-family:"Oswald",sans-serif; font-weight:600; color:#fff; font-size:18px}
  input[type=range]{width:100%; accent-color:var(--accent-blue); margin-top:8px}
  .flags{margin-top:14px; display:flex; flex-direction:column; gap:8px}
  .flag{display:flex; gap:9px; align-items:flex-start; font-size:13px; border-radius:var(--r); padding:9px 12px; line-height:1.4}
  .flag .ic{font-family:"Oswald",sans-serif; font-weight:700; flex:0 0 auto}
  .flag.ok{background:var(--ok-soft); color:#1d5236}
  .flag.warn{background:var(--warn-soft); color:#73510a}
  .flag.bad{background:var(--danger-soft); color:#8c2b20}

  .viz-card{border:1px solid var(--line); border-radius:var(--r-lg); padding:14px; background:var(--off-white,#f6f6f4)}
  .viz-head{font-family:"Oswald",sans-serif; text-transform:uppercase; letter-spacing:.12em; font-size:10px; color:var(--muted); margin:2px 4px 10px; display:flex; align-items:center; gap:10px}
  .viz-head::before{content:''; width:20px; height:1px; background:var(--muted)}
  .viz-empty{display:grid; place-items:center; height:300px; color:var(--muted); font-size:14px; text-align:center; padding:0 30px}
  .legend{display:flex; flex-wrap:wrap; gap:14px; margin:12px 4px 2px; font-size:12px; color:var(--ink-2)}
  .legend span{display:inline-flex; align-items:center; gap:6px}
  .legend i{width:13px; height:13px; border-radius:3px; display:inline-block}

  /* Step 4 upload */
  .dz{border:1px dashed var(--line-strong); border-radius:var(--r); padding:22px; text-align:center; background:var(--navy-pale); cursor:pointer; transition:border-color .15s, background .15s}
  .dz:hover{border-color:var(--accent-blue); background:var(--navy-pale)}
  .dz .dzt{font-family:"Oswald",sans-serif; text-transform:uppercase; letter-spacing:.1em; font-size:13px; font-weight:400}
  .dz .dzs{font-size:12px; color:var(--muted); margin-top:4px; font-family:"Source Serif 4",serif; font-style:italic; font-weight:300}
  .filelist{margin-top:12px; display:flex; flex-direction:column; gap:7px}
  .fileitem{display:flex; justify-content:space-between; align-items:center; gap:10px; font-size:13px; background:#fff; border:1px solid var(--line); border-radius:8px; padding:8px 12px}
  .fileitem button{border:none; background:none; color:var(--danger); cursor:pointer; font-size:13px; font-family:"Inter"}

  /* Summary */
  .sumlist{display:flex; flex-direction:column; gap:0; border:1px solid var(--line); border-radius:var(--r); overflow:hidden}
  .sumrow{display:flex; gap:14px; padding:13px 16px; border-bottom:1px solid var(--line); align-items:flex-start}
  .sumrow:last-child{border-bottom:none}
  .sumrow .k{flex:0 0 150px; font-family:"Oswald",sans-serif; text-transform:uppercase; letter-spacing:.04em; font-size:12px; color:var(--muted); padding-top:1px}
  .sumrow .val{flex:1; font-size:14px; color:var(--ink)}
  .sumrow .edit{flex:0 0 auto; font-size:11px; color:var(--accent-blue); background:none; border:none; cursor:pointer; font-family:"Oswald"; text-transform:uppercase; letter-spacing:.08em}
  .consent{margin-top:20px; display:flex; flex-direction:column; gap:12px}
  .check{display:flex; gap:11px; align-items:flex-start; font-size:13.5px; color:var(--ink-2); line-height:1.5}
  .check input{margin-top:3px; width:17px; height:17px; accent-color:var(--accent-blue); flex:0 0 auto}

  /* Confirm */
  .confirm{text-align:center; padding:14px 0}
  .confirm .seal{width:64px; height:64px; border-radius:50%; background:var(--navy-pale); color:var(--navy); display:grid; place-items:center; margin:6px auto 16px; font-family:"Oswald"; font-weight:700; font-size:30px}
  .confirm h2{margin-bottom:6px}
  .reqno{font-family:"Oswald",sans-serif; font-weight:700; font-size:22px; letter-spacing:.1em; background:var(--navy); color:#fff; display:inline-block; padding:9px 18px; border-radius:999px; margin:14px 0 18px}
  .recap{max-width:480px; margin:0 auto; text-align:left}

  /* Footer nav */
  .nav{display:flex; justify-content:space-between; align-items:center; gap:14px; margin-top:26px; padding-top:22px; border-top:1px solid var(--line)}
  .btn{font-family:"Oswald",sans-serif; font-weight:500; text-transform:uppercase; letter-spacing:.1em; font-size:13px; border-radius:999px; padding:13px 30px; cursor:pointer; border:1px solid var(--navy); transition:all .15s}
  .btn.primary{background:var(--navy); color:#fff}
  .btn.primary:hover{background:var(--navy-light); border-color:var(--navy-light)}
  .btn.primary:disabled{background:#b0b0b0; border-color:#b0b0b0; color:#fff; cursor:not-allowed}
  .btn.ghost{background:transparent; color:var(--navy)}
  .btn.ghost:hover{background:var(--navy); color:#fff}
  .btn:focus-visible{outline:2px solid var(--accent-blue); outline-offset:3px}
  .nav .spacer{flex:1}

  footer.foot{background-color: transparent; padding:22px 0 40px; border-top:1px solid var(--line); color:var(--muted); font-size:12px; display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap}

  @media (max-width:820px){
    .layout{grid-template-columns:1fr; gap:18px}
    .rail{display:none}
    .mprogress{display:block; position:sticky; top:0; z-index:5; background:var(--paper); padding:12px 0}
    .mbar{height:6px; background:var(--line); border-radius:3px; overflow:hidden}
    .mbar i{display:block; height:100%; background:var(--accent-blue); transition:width .3s}
    .mptext{display:flex; justify-content:space-between; font-family:"Oswald"; text-transform:uppercase; letter-spacing:.05em; font-size:12px; color:var(--muted); margin-top:7px}
    .calc-grid{grid-template-columns:1fr}
    .grid2,.cards{grid-template-columns:1fr}
    .panel{padding:22px 18px}
    .sumrow{flex-wrap:wrap}
    .sumrow .k{flex-basis:100%}
  }
  @media (prefers-reduced-motion:reduce){*{transition:none !important; animation:none !important}}

  /* ═ NAV ═ */
  .sw-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 200;
    background: var(--navy); border-bottom: none;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 40px; height: 64px;
  }
  .sw-nav-logo img { height: 44px; display: block; filter: brightness(0) invert(1); }
  /* Breadcrumb bar */
  .sw-breadcrumb {
    background: #fff; border-bottom: 1px solid #e8e8e8;
    padding: 0 40px; height: 36px;
    display: flex; align-items: center; gap: 8px;
    font-family: "Oswald", sans-serif; font-size: 10px; font-weight: 400;
    letter-spacing: 2px; text-transform: uppercase; color: #999;
  }
  .sw-breadcrumb a { color: #999; text-decoration: none; transition: color .2s; }
  .sw-breadcrumb a:hover { color: var(--navy); }
  .sw-breadcrumb-sep { color: #ccc; }
  .sw-breadcrumb-current { color: var(--accent-blue); }

  .sw-nav-right { display: flex; align-items: center; gap: 20px; }
  .sw-nav-hamburger { background: none; border: none; cursor: pointer; display: flex; flex-direction: column; gap: 5px; padding: 6px; }
  .sw-nav-hamburger span { display: block; width: 22px; height: 2px; background: rgba(255,255,255,0.75); border-radius: 2px; }
  .sw-nav-cta-btn { background: #1758ff; color: #fff; border: none; border-radius: 999px; padding: 10px 22px; font-family: "Oswald", sans-serif; font-size: 14px; font-weight: 500; letter-spacing: 1.5px; text-transform: uppercase; cursor: pointer; transition: background .2s; white-space: nowrap; }
  .sw-nav-cta-btn:hover { background: #0040dd; }
  @media (max-width: 820px) { .sw-nav { padding: 0 20px; } }