/* CalcHub – main stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:wght@300;400;500;600&display=swap');

:root {
  --brand:      #0ea5e9;
  --brand-dark: #0284c7;
  --brand-lite: #e0f2fe;
  --accent:     #f97316;
  --dark:       #0c1117;
  --dark2:      #151d26;
  --dark3:      #1e2a36;
  --text:       #e2e8f0;
  --muted:      #94a3b8;
  --border:     rgba(255,255,255,.08);
  --radius:     14px;
  --shadow:     0 8px 32px rgba(0,0,0,.35);
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }

html { scroll-behavior:smooth; }

body {
  font-family:'DM Sans',sans-serif;
  background:var(--dark);
  color:var(--text);
  min-height:100vh;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

/* ─── NAVBAR ─────────────────────────────────── */
.navbar {
  position:sticky; top:0; z-index:100;
  background:rgba(12,17,23,.85);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
  padding:0 1.5rem;
  height:64px;
  display:flex; align-items:center; justify-content:space-between;
}
.navbar .logo {
  font-family:'Syne',sans-serif;
  font-weight:800; font-size:1.5rem;
  color:#fff; text-decoration:none;
  display:flex; align-items:center; gap:.45rem;
}
.navbar .logo span { color:var(--brand); }
.nav-links { display:flex; align-items:center; gap:.25rem; }
.nav-links a {
  color:var(--muted); text-decoration:none; font-size:.9rem; font-weight:500;
  padding:.4rem .85rem; border-radius:8px; transition:.18s;
}
.nav-links a:hover { color:#fff; background:var(--dark3); }

/* Search bar */
.search-wrap {
  position:relative; flex:1; max-width:420px; margin:0 2rem;
}
.search-wrap input {
  width:100%; padding:.55rem 1rem .55rem 2.6rem;
  background:var(--dark3); border:1px solid var(--border);
  border-radius:50px; color:#fff; font-size:.9rem;
  outline:none; transition:.2s;
}
.search-wrap input::placeholder { color:var(--muted); }
.search-wrap input:focus { border-color:var(--brand); box-shadow:0 0 0 3px rgba(14,165,233,.15); }
.search-wrap .ico {
  position:absolute; left:.8rem; top:50%; transform:translateY(-50%);
  color:var(--muted); pointer-events:none;
}
.search-results-dropdown {
  position:absolute; top:calc(100% + 6px); left:0; right:0;
  background:var(--dark2); border:1px solid var(--border);
  border-radius:var(--radius); overflow:hidden;
  box-shadow:var(--shadow); display:none; z-index:200;
  max-height:380px; overflow-y:auto;
}
.search-results-dropdown.open { display:block; }
.search-results-dropdown a {
  display:flex; align-items:center; gap:.75rem;
  padding:.7rem 1rem; text-decoration:none; color:var(--text);
  font-size:.88rem; transition:.15s;
}
.search-results-dropdown a:hover { background:var(--dark3); color:#fff; }
.search-results-dropdown .sr-cat { font-size:.74rem; color:var(--muted); }

/* ─── HERO ───────────────────────────────────── */
.hero {
  text-align:center; padding:5rem 1.5rem 4rem;
  background:radial-gradient(ellipse 80% 60% at 50% -10%, rgba(14,165,233,.18) 0%, transparent 70%);
}
.hero h1 {
  font-family:'Syne',sans-serif; font-weight:800;
  font-size:clamp(2.4rem,5vw,4rem);
  line-height:1.1; letter-spacing:-.03em;
  color:#fff; margin-bottom:1rem;
}
.hero h1 .hl { color:var(--brand); }
.hero p { color:var(--muted); font-size:1.1rem; max-width:560px; margin:0 auto 2rem; }
.hero-search {
  max-width:580px; margin:0 auto;
  position:relative;
}
.hero-search input {
  width:100%; padding:.9rem 1.2rem .9rem 3.2rem;
  background:var(--dark2); border:1.5px solid var(--border);
  border-radius:50px; color:#fff; font-size:1rem;
  outline:none; transition:.2s;
}
.hero-search input:focus { border-color:var(--brand); box-shadow:0 0 0 4px rgba(14,165,233,.15); }
.hero-search .ico { position:absolute; left:1.1rem; top:50%; transform:translateY(-50%); color:var(--muted); }
.hero-search .search-results-dropdown { border-radius:18px; top:calc(100%+8px); }

/* Stats row */
.stats-row {
  display:flex; justify-content:center; gap:2.5rem;
  margin-top:2.5rem; flex-wrap:wrap;
}
.stat { text-align:center; }
.stat strong { display:block; font-family:'Syne',sans-serif; font-size:1.8rem; font-weight:800; color:#fff; }
.stat span { font-size:.82rem; color:var(--muted); }

/* ─── SECTIONS ───────────────────────────────── */
.section { padding:3rem 1.5rem; max-width:1280px; margin:0 auto; }
.section-title {
  font-family:'Syne',sans-serif; font-weight:700;
  font-size:1.5rem; color:#fff; margin-bottom:1.5rem;
  display:flex; align-items:center; gap:.6rem;
}
.section-title::after {
  content:''; flex:1; height:1px; background:var(--border);
}

/* ─── CATEGORY PILLS ─────────────────────────── */
.cat-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(160px,1fr));
  gap:1rem;
}
.cat-card {
  background:var(--dark2); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.2rem 1rem;
  text-decoration:none; color:var(--text);
  text-align:center; transition:.2s; cursor:pointer;
}
.cat-card:hover { border-color:var(--brand); background:var(--dark3); transform:translateY(-2px); }
.cat-card .icon { font-size:2rem; margin-bottom:.5rem; display:block; }
.cat-card .cname { font-weight:600; font-size:.9rem; color:#fff; }
.cat-card .cdesc { font-size:.76rem; color:var(--muted); margin-top:.2rem; }

/* ─── CALC GRID ──────────────────────────────── */
.calc-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:1rem;
}
.calc-card {
  background:var(--dark2); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.2rem 1.1rem;
  text-decoration:none; color:var(--text); transition:.2s;
  display:flex; flex-direction:column; gap:.4rem;
  position:relative; overflow:hidden;
}
.calc-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  opacity:0; transition:.2s;
}
.calc-card:hover { border-color:rgba(14,165,233,.35); transform:translateY(-3px); box-shadow:0 12px 40px rgba(0,0,0,.4); }
.calc-card:hover::before { opacity:1; }
.calc-card .cc-cat { font-size:.72rem; color:var(--brand); font-weight:600; text-transform:uppercase; letter-spacing:.05em; }
.calc-card .cc-name { font-weight:600; font-size:.95rem; color:#fff; }
.calc-card .cc-desc { font-size:.8rem; color:var(--muted); line-height:1.5; }
.calc-card .cc-views { font-size:.74rem; color:var(--muted); margin-top:auto; }

/* ─── CALCULATOR PAGE ────────────────────────── */
.calc-page { max-width:900px; margin:0 auto; padding:2rem 1.5rem 4rem; }
.calc-breadcrumb { font-size:.82rem; color:var(--muted); margin-bottom:1.2rem; }
.calc-breadcrumb a { color:var(--brand); text-decoration:none; }
.calc-breadcrumb a:hover { text-decoration:underline; }
.calc-header { margin-bottom:1.8rem; }
.calc-header h1 { font-family:'Syne',sans-serif; font-size:clamp(1.6rem,3vw,2.4rem); font-weight:800; color:#fff; }
.calc-header p { color:var(--muted); margin-top:.5rem; font-size:.95rem; }
.calc-embed {
  background:var(--dark2); border:1px solid var(--border);
  border-radius:20px; padding:2rem;
  box-shadow:var(--shadow);
}

/* ─── ADMIN ──────────────────────────────────── */
.admin-wrap { display:flex; min-height:100vh; }
.admin-sidebar {
  width:240px; background:var(--dark2); border-right:1px solid var(--border);
  padding:1.5rem 1rem; flex-shrink:0; position:sticky; top:0; height:100vh; overflow-y:auto;
}
.admin-sidebar .logo { font-family:'Syne',sans-serif; font-weight:800; font-size:1.2rem; color:#fff; margin-bottom:2rem; display:block; }
.admin-sidebar .logo span { color:var(--brand); }
.admin-sidebar nav a {
  display:flex; align-items:center; gap:.6rem;
  padding:.6rem .9rem; border-radius:10px; color:var(--muted);
  text-decoration:none; font-size:.88rem; margin-bottom:.15rem; transition:.15s;
}
.admin-sidebar nav a:hover, .admin-sidebar nav a.active { background:var(--dark3); color:#fff; }
.admin-main { flex:1; padding:2rem; overflow-y:auto; }
.admin-topbar {
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:2rem;
}
.admin-topbar h2 { font-family:'Syne',sans-serif; font-weight:700; font-size:1.4rem; }
.btn {
  display:inline-flex; align-items:center; gap:.45rem;
  padding:.55rem 1.1rem; border-radius:10px; font-size:.88rem; font-weight:600;
  cursor:pointer; text-decoration:none; transition:.18s; border:none;
}
.btn-primary { background:var(--brand); color:#fff; }
.btn-primary:hover { background:var(--brand-dark); }
.btn-danger { background:#ef4444; color:#fff; }
.btn-danger:hover { background:#dc2626; }
.btn-ghost { background:var(--dark3); color:var(--text); border:1px solid var(--border); }
.btn-ghost:hover { border-color:var(--brand); color:#fff; }
.btn-sm { padding:.35rem .75rem; font-size:.8rem; }

/* Form */
.form-group { margin-bottom:1.3rem; }
.form-group label { display:block; font-size:.84rem; font-weight:600; color:var(--muted); margin-bottom:.4rem; }
.form-group input, .form-group select, .form-group textarea {
  width:100%; background:var(--dark3); border:1px solid var(--border);
  border-radius:10px; color:#fff; padding:.65rem .9rem; font-size:.92rem;
  font-family:inherit; outline:none; transition:.18s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color:var(--brand); box-shadow:0 0 0 3px rgba(14,165,233,.12);
}
.form-group textarea { resize:vertical; min-height:100px; }
.form-group textarea.code-field {
  font-family:'Fira Code','Cascadia Code',monospace; font-size:.83rem;
  min-height:360px; line-height:1.6; tab-size:2;
}
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:1.2rem; }
.form-hint { font-size:.75rem; color:var(--muted); margin-top:.3rem; }

/* Table */
.data-table { width:100%; border-collapse:collapse; font-size:.875rem; }
.data-table th { text-align:left; padding:.7rem 1rem; color:var(--muted); font-weight:600; border-bottom:1px solid var(--border); font-size:.78rem; text-transform:uppercase; letter-spacing:.05em; }
.data-table td { padding:.75rem 1rem; border-bottom:1px solid var(--border); color:var(--text); }
.data-table tr:hover td { background:var(--dark3); }
.badge { display:inline-flex; align-items:center; padding:.2rem .55rem; border-radius:50px; font-size:.72rem; font-weight:600; }
.badge-green { background:rgba(34,197,94,.15); color:#4ade80; }
.badge-red   { background:rgba(239,68,68,.15);  color:#f87171; }
.badge-blue  { background:rgba(14,165,233,.15);  color:#38bdf8; }

/* Card */
.admin-card { background:var(--dark2); border:1px solid var(--border); border-radius:var(--radius); padding:1.5rem; }
.admin-stats { display:grid; grid-template-columns:repeat(auto-fill,minmax(180px,1fr)); gap:1rem; margin-bottom:2rem; }
.stat-card { background:var(--dark2); border:1px solid var(--border); border-radius:var(--radius); padding:1.3rem; }
.stat-card .label { font-size:.78rem; color:var(--muted); font-weight:600; text-transform:uppercase; letter-spacing:.05em; }
.stat-card .value { font-family:'Syne',sans-serif; font-size:2rem; font-weight:800; color:#fff; margin-top:.3rem; }

/* Alerts */
.alert { padding:.8rem 1.1rem; border-radius:10px; font-size:.875rem; margin-bottom:1rem; }
.alert-success { background:rgba(34,197,94,.12); border:1px solid rgba(34,197,94,.3); color:#4ade80; }
.alert-error   { background:rgba(239,68,68,.12);  border:1px solid rgba(239,68,68,.3);  color:#f87171; }

/* ─── FOOTER ─────────────────────────────────── */
footer {
  border-top:1px solid var(--border);
  padding:2.5rem 1.5rem; text-align:center;
  color:var(--muted); font-size:.83rem;
}
footer a { color:var(--brand); text-decoration:none; }

/* ─── RESPONSIVE ─────────────────────────────── */
@media(max-width:768px) {
  .search-wrap { display:none; }
  .form-row { grid-template-columns:1fr; }
  .admin-sidebar { width:200px; }
  .cat-grid { grid-template-columns:repeat(2,1fr); }
}
@media(max-width:600px) {
  .admin-wrap { flex-direction:column; }
  .admin-sidebar { width:100%; height:auto; position:static; display:flex; flex-wrap:wrap; gap:.3rem; }
  .admin-sidebar nav { display:flex; flex-wrap:wrap; gap:.3rem; }
  .admin-main { padding:1rem; }
  .hero { padding:3rem 1rem 2.5rem; }
  .calc-grid { grid-template-columns:1fr 1fr; }
}
@media(max-width:400px) {
  .calc-grid { grid-template-columns:1fr; }
  .cat-grid { grid-template-columns:repeat(2,1fr); }
}