/* =========================================================
   InvoiceProApp — Shared Design System
   One file, used by every page. Change here → changes everywhere.
   ========================================================= */

:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-light:#eff6ff;
  --dark:#0f172a;
  --light:#f8fafc;
  --card:#ffffff;
  --border:#e5e7eb;
  --muted:#6b7280;
  --success:#16a34a;
  --success-light:#dcfce7;
  --danger:#dc2626;
  --danger-light:#fee2e2;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 4px 16px rgba(15,23,42,.06);
  --shadow-lg:0 12px 32px rgba(15,23,42,.10);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,Arial,Helvetica,sans-serif;
  background:var(--light);
  color:#111827;
  line-height:1.5;
}
a{text-decoration:none;color:inherit}
img{max-width:100%}

/* ================= LAYOUT ================= */
.full{max-width:1200px;margin:auto;padding:0 20px}
.container{max-width:900px;margin:auto;background:var(--card);padding:40px;border-radius:var(--radius)}
.section{padding:60px 20px}
.center{text-align:center}

/* ================= NAVBAR ================= */
.navbar{
  position:sticky;top:0;z-index:9999;
  background:#ffffff;border-bottom:1px solid var(--border);
  box-shadow:0 2px 10px rgba(0,0,0,.04);
}
.nav-inner{
  max-width:1200px;margin:auto;padding:14px 20px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:10px}
.brand img.logo{height:38px;width:auto;max-width:180px;object-fit:contain}
.brand span{font-weight:700;color:var(--primary);font-size:18px}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 12px;font-size:14.5px;border-radius:8px;color:#374151}
.nav-links a:hover{background:var(--primary-light);color:var(--primary)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-cta{background:var(--primary)!important;color:#fff!important;padding:9px 16px!important}
.nav-cta:hover{background:var(--primary-dark)!important}

/* Tools dropdown */
.has-dropdown{position:relative}
.dropdown{
  display:none;position:absolute;top:110%;left:0;
  background:#fff;border:1px solid var(--border);border-radius:12px;
  box-shadow:var(--shadow-lg);min-width:260px;padding:8px;z-index:50;
}
.has-dropdown:hover .dropdown,.has-dropdown.open .dropdown{display:block}
.dropdown a{display:flex;flex-direction:column;padding:10px 12px;border-radius:8px;font-size:14px}
.dropdown a:hover{background:var(--primary-light)}
.dropdown a small{color:var(--muted);font-weight:400;font-size:12px}

.hamburger{display:none;font-size:26px;cursor:pointer;background:none;border:none}

@media(max-width:900px){
  .hamburger{display:block}
  .nav-links{
    position:absolute;top:64px;left:0;right:0;
    background:#fff;flex-direction:column;align-items:stretch;
    display:none;border-bottom:1px solid var(--border);padding:8px;
    max-height:80vh;overflow-y:auto;
  }
  .nav-links.open{display:flex}
  .nav-links a{margin:0;padding:12px 16px}
  .dropdown{position:static;box-shadow:none;border:none;display:block!important;padding-left:12px}
  .has-dropdown .dropdown{display:none!important}
  .has-dropdown.open .dropdown{display:block!important}
}

/* ================= HERO ================= */
.hero{padding:70px 20px 50px;text-align:center}
.hero h1{font-size:38px;margin:0 0 14px;color:var(--dark)}
.hero p{color:var(--muted);font-size:16px;margin:0 0 26px}
.cta{
  display:inline-block;background:var(--primary);color:#fff;
  padding:14px 28px;border-radius:10px;font-weight:600;font-size:15px;
}
.cta:hover{background:var(--primary-dark)}
.cta.outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}

/* ================= CARDS / TOOL GRID ================= */
.card{
  background:var(--card);padding:28px;border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid-3,.grid-4{grid-template-columns:1fr}}

.tool-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 22px;transition:.15s;display:flex;flex-direction:column;gap:10px;
}
.tool-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary);transform:translateY(-2px)}
.tool-card .icon{
  width:46px;height:46px;border-radius:12px;background:var(--primary-light);
  display:flex;align-items:center;justify-content:center;font-size:22px;
}
.tool-card h3{margin:0;font-size:17px}
.tool-card p{margin:0;color:var(--muted);font-size:14px;flex-grow:1}
.tool-card .go{color:var(--primary);font-weight:600;font-size:14px}
.tool-card.soon{opacity:.55;pointer-events:none}
.badge{
  display:inline-block;font-size:11px;font-weight:700;padding:3px 8px;
  border-radius:999px;background:var(--success-light);color:var(--success);
  width:fit-content;
}
.badge.new{background:var(--primary-light);color:var(--primary)}
.badge.soon{background:#f1f5f9;color:var(--muted)}

/* ================= FORMS ================= */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:700px){.form-grid{grid-template-columns:1fr}}
.form-group{margin-bottom:4px}
.form-group label{display:block;margin-bottom:6px;font-size:13.5px;font-weight:600;color:#374151}
.form-group input,.form-group select,.form-group textarea{
  width:100%;height:44px;padding:10px 12px;border-radius:var(--radius-sm);
  border:1px solid var(--border);font-size:14.5px;background:#fff;font-family:inherit;
}
.form-group textarea{height:auto}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);
}
.section-title{
  margin:36px 0 16px;font-size:17px;font-weight:700;
  border-left:4px solid var(--primary);padding-left:12px;
}
.hint{font-size:12.5px;color:var(--muted);margin-top:4px}

button{font-family:inherit;cursor:pointer}
.generate-btn{
  background:var(--primary);color:#fff;border:none;padding:15px 24px;
  border-radius:var(--radius-sm);font-size:16px;font-weight:600;width:100%;margin-top:20px;
}
.generate-btn:hover{background:var(--primary-dark)}
.add-btn{
  margin-top:14px;padding:10px 18px;border-radius:var(--radius-sm);
  background:#fff;border:1.5px dashed var(--primary);color:var(--primary);font-weight:600;
}
.add-btn:hover{background:var(--primary-light)}

/* ================= ITEMS TABLE ================= */
table{width:100%;border-collapse:collapse}
#items{margin-top:16px}
#items th{background:#f1f5f9;font-weight:600;font-size:13.5px;text-align:center;padding:10px}
#items td{background:#fff;padding:6px;border-bottom:1px solid var(--border)}
#items input,#items select{height:40px;font-size:13.5px}

/* Prevent the items/earnings/deductions tables from crushing on small phones —
   they scroll horizontally instead of squeezing every column unreadably small */
@media(max-width:700px){
  #items,#earnings,#deductions,#hsnTable{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:10px}
  #items{min-width:640px}
  #earnings,#deductions{min-width:420px}
  #hsnTable{min-width:520px}
}
.item-total{font-weight:600;text-align:right;padding-right:10px!important;white-space:nowrap}

/* ================= PREVIEW / TAX BOX ================= */
.preview-box{
  margin-top:20px;padding:20px;border-radius:var(--radius);
  background:#fff;border:1px dashed #c7d2fe;
}
.tax-row{display:flex;justify-content:space-between;padding:7px 0;font-size:15px}
.tax-row.total{border-top:1px solid var(--border);margin-top:6px;padding-top:12px;font-size:17px}

/* ================= FAQ ================= */
.faq-item{border-bottom:1px solid var(--border);padding:16px 4px;cursor:pointer}
.faq-q{display:flex;justify-content:space-between;font-weight:600;font-size:15.5px}
.faq-a{display:none;margin-top:10px;color:var(--muted);font-size:14.5px;line-height:1.7}

/* ================= ALERTS ================= */
.success{background:var(--success-light);color:#166534;padding:12px 16px;border-radius:10px;margin-bottom:16px}
.error{background:var(--danger-light);color:#991b1b;padding:12px 16px;border-radius:10px;margin-bottom:16px}

/* ================= AD BOX ================= */
.ad-box{
  margin:28px 0;padding:16px;border:1px dashed #c7d2fe;background:#f8fafc;
  text-align:center;color:var(--muted);font-size:13px;border-radius:10px;
}

/* ================= FOOTER ================= */
.footer{background:var(--dark);color:#cbd5f5;padding:44px 20px 30px;font-size:14px}
.footer-grid{max-width:1200px;margin:auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer h4{color:#fff;font-size:14px;margin:0 0 12px}
.footer a{color:#94a3b8;display:block;margin-bottom:8px;font-size:13.5px}
.footer a:hover{color:#fff}
.footer-bottom{
  max-width:1200px;margin:30px auto 0;padding-top:20px;border-top:1px solid #1e293b;
  text-align:center;color:#64748b;font-size:13px;
}

/* ================= MISC / BADGES ================= */
.pill{display:inline-block;background:var(--primary-light);color:var(--primary);padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600}

/* ================= PREVIEW MODAL ================= */
#previewModal{
  display:none;position:fixed;inset:0;background:rgba(15,23,42,.55);
  z-index:99999;padding:20px;overflow-y:auto;
}
#previewModal .box{
  background:#fff;max-width:800px;margin:30px auto;border-radius:var(--radius);
  padding:30px;
}

/* ================= UTIL ================= */
.mt-0{margin-top:0}
.text-muted{color:var(--muted)}
.flex-between{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}