:root{
  --g1:#1a4f16;--g2:#2d7a26;--g3:#e8f5e6;--g4:#f4fbf3;
  --ink:#1c2318;--ink2:#4a5568;--muted:#8a9a88;--line:#e2e8e0;
  --gold:#c49a1a;--gold-bg:#fffbeb;--red:#e53e3e;
  --blue:#1d4ed8;--blue-bg:#eff6ff;
  --white:#ffffff;--bg:#f5f6f2;--radius:14px;
  --shadow:0 2px 20px rgba(26,79,22,0.08),0 1px 4px rgba(0,0,0,0.04);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--ink);min-height:100vh;display:flex;flex-direction:column}
.site-header{background:var(--white);border-bottom:1px solid var(--line);padding:0 20px;display:flex;align-items:center;gap:14px;height:56px;flex-shrink:0;position:sticky;top:0;z-index:50}
.header-logo{display:flex;align-items:center;gap:10px}
.logo-img{width:36px;height:36px;object-fit:contain}
.header-name{font-family:'Lora',serif;font-size:.9rem;font-weight:700;color:var(--g1);line-height:1.1}
.header-name small{display:block;font-family:'DM Sans',sans-serif;font-size:.62rem;font-weight:400;color:var(--muted);font-style:normal}
.header-divider{width:1px;height:24px;background:var(--line);margin:0 4px}
.header-title{font-size:.82rem;font-weight:600;color:var(--ink2)}
/* Progress */
.progress-wrap{max-width:720px;margin:16px auto 0;padding:0 20px;flex-shrink:0}
.progress-steps{display:flex;align-items:center}
.prog-step{display:flex;flex-direction:column;align-items:center;gap:5px;flex:1;position:relative}
.prog-step::after{content:'';position:absolute;top:14px;left:calc(50% + 16px);right:calc(-50% + 16px);height:2px;background:var(--line);transition:background .4s}
.prog-step:last-child::after{display:none}
.prog-step.done::after{background:var(--g2)}
.prog-dot{width:28px;height:28px;border-radius:50%;border:2px solid var(--line);background:white;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;color:var(--muted);transition:all .3s;position:relative;z-index:1}
.prog-step.active .prog-dot{border-color:var(--g1);background:var(--g1);color:white;box-shadow:0 0 0 4px rgba(26,79,22,.12)}
.prog-step.done .prog-dot{border-color:var(--g2);background:var(--g2);color:white}
.prog-label{font-size:.68rem;color:var(--muted);font-weight:500;text-align:center;white-space:nowrap}
.prog-step.active .prog-label{color:var(--g1);font-weight:600}
.prog-step.done .prog-label{color:var(--g2)}
/* Form container */
.form-container{max-width:720px;margin:14px auto 20px;padding:0 20px;width:100%;flex:1}
.step-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:none;animation:slideIn .35s ease}
.step-card.active{display:block}
@keyframes slideIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.card-hero{background:linear-gradient(135deg,var(--g1) 0%,var(--g2) 100%);padding:18px 28px 16px;position:relative;overflow:hidden}
.card-hero::before{content:'';position:absolute;right:-30px;top:-30px;width:140px;height:140px;border-radius:50%;background:rgba(255,255,255,.06)}
.card-hero-step{font-size:.68rem;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:1.5px;font-weight:600;margin-bottom:4px}
.card-hero h2{font-family:'Lora',serif;font-size:1.3rem;color:white;font-weight:700;line-height:1.2}
.card-hero p{color:rgba(255,255,255,.7);font-size:.8rem;margin-top:4px;line-height:1.4}
.card-body{padding:20px 28px}
/* Pilih kurikulum */
.kuri-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:6px}
.kuri-card{border:2px solid var(--line);border-radius:12px;padding:18px 16px;cursor:pointer;transition:all .2s;text-align:center;background:white}
.kuri-card:hover{border-color:var(--g2);background:var(--g4)}
.kuri-card.selected{border-color:var(--g1);background:var(--g3);box-shadow:0 0 0 3px rgba(26,79,22,.1)}
.kuri-card .kuri-icon{font-size:1.7rem;margin-bottom:6px}
.kuri-card .kuri-title{font-family:'Lora',serif;font-size:.95rem;font-weight:700;color:var(--g1);margin-bottom:3px}
.kuri-card .kuri-desc{font-size:.73rem;color:var(--muted);line-height:1.4}
/* Fields */
.field-row{display:grid;gap:16px}
.field-row.cols2{grid-template-columns:1fr 1fr}
.fg{display:flex;flex-direction:column;gap:6px}
.fg label{font-size:.78rem;font-weight:600;color:var(--ink2);letter-spacing:.2px}
.fg label .req{color:var(--red);margin-left:2px}
.fg input,.fg select,.fg textarea{border:1.5px solid var(--line);border-radius:10px;padding:11px 14px;font-family:'DM Sans',sans-serif;font-size:.92rem;color:var(--ink);background:var(--white);transition:all .2s;-webkit-appearance:none;appearance:none}
.fg select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a9a88' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.fg input:focus,.fg select:focus,.fg textarea:focus{outline:none;border-color:var(--g2);box-shadow:0 0 0 3px rgba(45,122,38,.1)}
.fg input.err,.fg select.err,.fg textarea.err{border-color:var(--red)}
.fg textarea{min-height:72px;resize:vertical}
.fg .sub{font-size:.72rem;color:var(--muted)}
/* Buku list */
.buku-section{margin-bottom:20px}
.buku-kelas-title{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.kelas-badge{width:32px;height:32px;background:var(--g1);color:white;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;flex-shrink:0}
.kelas-badge.k2{background:#2563eb}.kelas-badge.k3{background:#7c3aed}.kelas-badge.k4{background:#d97706}.kelas-badge.k5{background:#059669}.kelas-badge.k6{background:#dc2626}
.buku-kelas-title h3{font-size:.85rem;font-weight:700;color:var(--ink)}
.buku-kelas-title span{font-size:.72rem;color:var(--muted)}
.disc-kelas-badge{font-size:.7rem;font-weight:700;background:var(--gold-bg);color:var(--gold);border:1px solid #f0d060;border-radius:12px;padding:2px 8px;margin-left:auto;white-space:nowrap}
.buku-rows{display:flex;flex-direction:column;gap:5px}
.buku-row{display:grid;grid-template-columns:1fr 52px 76px;gap:10px;align-items:center;padding:9px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--white);transition:all .2s}
.buku-row.has-qty{border-color:var(--g2);background:var(--g4)}
.buku-info{display:flex;flex-direction:column;gap:2px;overflow:hidden}
.buku-judul{font-size:.83rem;font-weight:600;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.buku-meta{display:flex;gap:8px;align-items:center}
.buku-harga{font-size:.73rem;color:var(--muted)}
.buku-sem{font-size:.66rem;background:var(--g3);color:var(--g1);padding:1px 7px;border-radius:20px;font-weight:600}
.mapel-tag{font-size:.64rem;background:#eff6ff;color:#1d4ed8;padding:1px 7px;border-radius:20px;font-weight:600}
.qty-wrap{display:flex;flex-direction:column;align-items:center;gap:3px}
.qty-label{font-size:.63rem;color:var(--muted);font-weight:600}
.qty-in{width:52px;height:34px;text-align:center;border:1.5px solid var(--line);border-radius:8px;font-family:'DM Sans',sans-serif;font-size:.88rem;font-weight:700;color:var(--ink);background:white;-moz-appearance:textfield}
.qty-in::-webkit-inner-spin-button,.qty-in::-webkit-outer-spin-button{-webkit-appearance:none}
.qty-in:focus{outline:none;border-color:var(--g2);box-shadow:0 0 0 3px rgba(45,122,38,.1)}
.qty-in.active{border-color:var(--g2);background:var(--g3);color:var(--g1)}
.sub-wrap{text-align:right}
.sub-val{font-size:.76rem;font-weight:700;color:var(--muted)}
.sub-val.has-val{color:var(--g1)}
/* Summary bar */
.summary-bar{position:sticky;bottom:0;background:white;border-top:1px solid var(--line);padding:12px 32px;display:flex;align-items:center;gap:14px;box-shadow:0 -4px 20px rgba(0,0,0,.06);z-index:10;flex-wrap:wrap}
.sum-item{display:flex;flex-direction:column;gap:1px}
.sum-item .lbl{font-size:.66rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.sum-item .val{font-size:.9rem;font-weight:700;color:var(--ink)}
.sum-item .val.disc{color:var(--gold)}
.sum-item .val.total{color:var(--g1);font-size:.98rem}
.sum-divider{width:1px;height:28px;background:var(--line);flex-shrink:0}
/* Nota preview */
.nota-preview{background:var(--g4);border:1.5px dashed var(--g2);border-radius:10px;padding:18px 20px;margin-bottom:18px}
.nota-preview .nota-title{font-family:'Lora',serif;font-size:.95rem;font-weight:700;color:var(--g1);margin-bottom:12px}
.nota-preview table{width:100%;border-collapse:collapse;font-size:.8rem}
.nota-preview thead tr{border-bottom:2px solid var(--g2)}
.nota-preview thead th{padding:5px 7px;text-align:left;color:var(--g1);font-weight:700;font-size:.7rem;text-transform:uppercase;letter-spacing:.5px}
.nota-preview thead th.r{text-align:right}
.nota-preview tbody tr{border-bottom:1px solid var(--line)}
.nota-preview tbody td{padding:6px 7px;color:var(--ink2);font-size:.79rem}
.nota-preview tbody td.r{text-align:right;font-weight:600;color:var(--g1)}
.nota-preview tfoot tr{border-top:2px solid var(--g2)}
.nota-preview tfoot td{padding:7px;font-weight:700;font-size:.82rem}
.nota-preview tfoot td.r{text-align:right;color:var(--g1)}
.surat-note{background:#f0f7ff;border-left:3px solid #3b82f6;border-radius:0 8px 8px 0;padding:11px 13px;font-size:.79rem;color:#1e40af;margin-bottom:16px;line-height:1.6}
.pengiriman-note{background:#fef9ee;border-left:3px solid var(--gold);border-radius:0 8px 8px 0;padding:11px 13px;font-size:.79rem;color:#78460a;margin-bottom:16px;line-height:1.7}
/* Buttons */
.nav-buttons{display:flex;justify-content:space-between;align-items:center;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);gap:12px}
.btn{padding:11px 26px;border-radius:10px;font-family:'DM Sans',sans-serif;font-size:.88rem;font-weight:600;cursor:pointer;border:none;display:flex;align-items:center;gap:8px;transition:all .2s}
.btn-back{background:transparent;color:var(--ink2);border:1.5px solid var(--line)}
.btn-back:hover{border-color:var(--ink2);background:var(--bg)}
.btn-next{background:var(--g1);color:white;box-shadow:0 4px 14px rgba(26,79,22,.3);margin-left:auto}
.btn-next:hover{background:var(--g2);transform:translateY(-1px)}
.btn-submit{background:linear-gradient(135deg,var(--g1),var(--g2));color:white;padding:13px 30px;font-size:.93rem;box-shadow:0 4px 16px rgba(26,79,22,.35);margin-left:auto}
.btn-submit:hover{transform:translateY(-1px)}
.btn-pdf{background:white;color:var(--g1);border:1.5px solid var(--g2)}
.btn-pdf:hover{background:var(--g3)}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:white;border-radius:50%;animation:spin .7s linear infinite;display:none}
.btn.loading .spinner{display:block}
.btn.loading .btn-txt{display:none}
@keyframes spin{to{transform:rotate(360deg)}}
/* Success */
.success-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:52px 32px;text-align:center;display:none;animation:slideIn .4s ease}
.success-card.active{display:block}
.success-icon{width:80px;height:80px;background:var(--g3);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.2rem;margin:0 auto 20px}
.success-card h2{font-family:'Lora',serif;font-size:1.6rem;color:var(--g1);margin-bottom:8px}
.success-card p{color:var(--ink2);font-size:.9rem;line-height:1.7}
.inv-box{display:inline-block;background:var(--g3);color:var(--g1);border:1.5px solid var(--g2);border-radius:8px;padding:8px 22px;font-family:monospace;font-size:1.1rem;font-weight:700;margin:14px 0;letter-spacing:1px}
.success-actions{display:flex;gap:10px;justify-content:center;margin-top:22px;flex-wrap:wrap}
/* Mobile sticky btn: hanya tampil di mobile */
.mobile-sticky-btn{display:none}

/* ── MOBILE LAYOUT (≤600px) ─────────────────────────── */
@media(max-width:600px){

  /* Header: kompak tapi terbaca */
  .site-header{padding:0 16px;height:54px;gap:10px}
  .logo-img{width:34px;height:34px}
  .header-name{font-size:.88rem}
  .header-name small{font-size:.6rem}
  .header-divider{height:20px}
  .header-title{font-size:.78rem}

  /* Progress: ukuran nyaman */
  .progress-wrap{margin:14px auto 0;padding:0 16px}
  .prog-dot{width:30px;height:30px;font-size:.75rem}
  .prog-label{font-size:.65rem}
  .prog-step{gap:5px}

  /* Form container: pakai padding bawah untuk sticky btn */
  .form-container{margin:14px auto 0;padding:0 16px 80px}

  /* Card hero: ringkas, tidak makan banyak ruang */
  .card-hero{padding:16px 18px 14px}
  .card-hero-step{font-size:.65rem;margin-bottom:3px}
  .card-hero h2{font-size:1.2rem}
  .card-hero p{font-size:.78rem;margin-top:3px}

  /* Card body: lega untuk jari */
  .card-body{padding:18px 16px}

  /* Kuri-grid: 2 kolom besar & ramah jari */
  .kuri-grid{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:4px}
  .kuri-card{padding:20px 12px;border-radius:14px}
  .kuri-card .kuri-icon{font-size:2rem;margin-bottom:8px}
  .kuri-card .kuri-title{font-size:.9rem;margin-bottom:4px}
  .kuri-card .kuri-desc{font-size:.72rem;line-height:1.5}

  /* Nav-buttons: SEMBUNYIKAN di step-1 (pakai sticky btn) */
  #step-1 .nav-buttons{display:none}

  /* Sticky tombol Lanjut khusus step-1 mobile */
  .mobile-sticky-btn{
    display:flex;
    position:fixed;
    bottom:0;left:0;right:0;
    padding:12px 16px 20px;
    background:white;
    border-top:1px solid var(--line);
    box-shadow:0 -4px 20px rgba(0,0,0,.08);
    z-index:40;
    gap:10px;
    align-items:center;
  }
  .mobile-sticky-btn .hint{
    font-size:.75rem;
    color:var(--muted);
    flex:1;
  }
  .mobile-sticky-btn .btn{
    min-width:140px;
    justify-content:center;
    padding:13px 20px;
    font-size:.9rem;
  }

  /* Fields: 1 kolom */
  .field-row.cols2{grid-template-columns:1fr}

  /* Buku rows */
  .buku-row{grid-template-columns:1fr 44px 60px;padding:8px 10px}
  .buku-judul{font-size:.8rem}

  /* Summary bar */
  .summary-bar{padding:10px 16px;gap:10px}
  .sum-item .val{font-size:.85rem}

  /* Nav buttons (step 2,3,4) */
  .nav-buttons{margin-top:14px;padding-top:14px}
  .btn{padding:12px 18px;font-size:.85rem}
  .btn-submit{padding:13px 20px;font-size:.88rem}
}