/* =========================================================
   DataSeek — design tokens
   Palette: ink navy + phosphor mint signal + amber accent
   Type: Space Grotesk (display) / IBM Plex Mono (data/eyebrow) / Inter (body)
========================================================= */
:root{
  --ink:        #0B1220;
  --ink-mid:    #121B2E;
  --card:       #16213A;
  --card-line:  #26324A;
  --paper:      #F4F2EC;
  --signal:     #2FBF9A;
  --signal-dim: #1F8C71;
  --amber:      #F2A65A;
  --text:       #E7E9EE;
  --text-muted: #8A93A6;
  --danger:     #E5626B;
  --radius:     10px;
  --maxw:       1160px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Space Grotesk', 'Inter', sans-serif;
  font-weight:600;
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
p{ margin:0 0 1em; color:var(--text-muted); }
a{ color:var(--signal); text-decoration:none; }
a:hover{ text-decoration:underline; }
img{ max-width:100%; display:block; }
.mono{ font-family:'IBM Plex Mono', ui-monospace, monospace; }

.container{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:12.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--signal);
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 3px rgba(47,191,154,.18);
}

/* ---------- buttons & form controls ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:'Space Grotesk', sans-serif;
  font-weight:600; font-size:15px;
  padding:12px 22px;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{ text-decoration:none; }
.btn-primary{ background:var(--signal); color:#06120E; }
.btn-primary:hover{ background:#3fd3ac; transform:translateY(-1px); }
.btn-ghost{ background:transparent; color:var(--text); border-color:var(--card-line); }
.btn-ghost:hover{ border-color:var(--signal); color:var(--signal); }
.btn-amber{ background:var(--amber); color:#2b1a06; }
.btn-amber:hover{ background:#f5b877; transform:translateY(-1px); }
.btn-danger{ background:transparent; color:var(--danger); border-color:var(--danger); }
.btn-danger:hover{ background:rgba(229,98,107,.1); }
.btn-block{ width:100%; }
.btn-sm{ padding:7px 14px; font-size:13px; }

label{ font-size:13.5px; font-weight:600; color:var(--text); display:block; margin-bottom:6px; }
input[type=text],input[type=email],input[type=password],input[type=tel],input[type=number],select,textarea{
  width:100%;
  background:var(--ink-mid);
  border:1px solid var(--card-line);
  color:var(--text);
  padding:11px 13px;
  border-radius:8px;
  font-size:14.5px;
  font-family:'Inter', sans-serif;
  margin-bottom:16px;
}
input:focus,select:focus,textarea:focus{
  outline:2px solid var(--signal);
  outline-offset:1px;
  border-color:var(--signal);
}
textarea{ min-height:110px; resize:vertical; }
.field-hint{ font-size:12px; color:var(--text-muted); margin-top:-12px; margin-bottom:16px; }

input[type=file]{
  width:100%; background:var(--ink-mid); border:1px dashed var(--card-line);
  color:var(--text-muted); padding:14px 13px; border-radius:8px; font-size:13.5px;
  margin-bottom:16px; font-family:'Inter', sans-serif;
}
input[type=file]::file-selector-button{
  background:var(--signal); color:#06120E; border:none; border-radius:6px;
  padding:8px 14px; font-family:'Space Grotesk',sans-serif; font-weight:600;
  font-size:13px; margin-right:12px; cursor:pointer;
}
input[type=checkbox]{ width:15px; height:15px; accent-color:var(--signal); }
select{ appearance:none; -webkit-appearance:none; }
select[multiple]{ min-height:120px; }

/* ---------- alerts ---------- */
.alert{
  padding:12px 16px; border-radius:8px; font-size:14px; margin-bottom:20px;
  border:1px solid transparent;
}
.alert-success{ background:rgba(47,191,154,.1); color:var(--signal); border-color:rgba(47,191,154,.35); }
.alert-error{ background:rgba(229,98,107,.1); color:var(--danger); border-color:rgba(229,98,107,.35); }

/* ---------- site header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(11,18,32,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--card-line);
}
.nav{ display:flex; align-items:center; justify-content:space-between; padding:16px 0; }
.brand{ display:flex; align-items:center; gap:10px; font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:20px; color:var(--text); }
.brand:hover{ text-decoration:none; }
.brand .dot{ color:var(--signal); }
.nav-links{ display:flex; align-items:center; gap:28px; list-style:none; margin:0; padding:0; }
.nav-links a{ color:var(--text-muted); font-size:14.5px; font-weight:500; }
.nav-links a:hover{ color:var(--text); text-decoration:none; }
.nav-actions{ display:flex; align-items:center; gap:12px; }
.nav-toggle{ display:none; background:none; border:1px solid var(--card-line); color:var(--text); border-radius:8px; padding:8px 10px; cursor:pointer; }

/* ---------- hero / query table signature ---------- */
.hero{ padding:76px 0 60px; }
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:52px; align-items:center; }
.hero h1{ font-size:clamp(32px,4.2vw,50px); }
.hero h1 .hl{ color:var(--signal); }
.hero .lead{ font-size:17px; max-width:520px; }
.hero-cta{ display:flex; gap:14px; margin-top:26px; flex-wrap:wrap; }
.stat-row{ display:flex; gap:32px; margin-top:38px; flex-wrap:wrap; }
.stat b{ display:block; font-family:'Space Grotesk',sans-serif; font-size:24px; color:var(--text); }
.stat span{ font-size:12.5px; color:var(--text-muted); }

.query-panel{
  background:var(--card);
  border:1px solid var(--card-line);
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 24px 60px -30px rgba(0,0,0,.6);
}
.query-panel .qp-bar{
  display:flex; align-items:center; gap:8px;
  padding:12px 16px; border-bottom:1px solid var(--card-line);
}
.qp-bar span{ width:10px; height:10px; border-radius:50%; background:#3a4762; }
.qp-bar span:nth-child(1){ background:#e5626b; }
.qp-bar span:nth-child(2){ background:#f2a65a; }
.qp-bar span:nth-child(3){ background:#2fbf9a; }
.qp-bar .qp-title{ margin-left:8px; font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--text-muted); }
.query-panel pre{
  margin:0; padding:16px 18px 6px;
  font-family:'IBM Plex Mono',monospace; font-size:12.8px; color:var(--signal);
  white-space:pre-wrap; overflow-x:auto;
}
.query-panel pre .kw{ color:var(--amber); }
.query-panel pre .str{ color:#9fd0ff; }
.qp-table{ width:100%; border-collapse:collapse; font-family:'IBM Plex Mono',monospace; font-size:12.3px; }
.qp-table th{
  text-align:left; padding:9px 16px; color:var(--text-muted);
  border-top:1px solid var(--card-line); border-bottom:1px solid var(--card-line);
  font-weight:500; text-transform:uppercase; letter-spacing:.03em; font-size:10.5px;
}
.qp-table td{ padding:9px 16px; border-bottom:1px solid rgba(38,50,74,.6); color:var(--text); }
.qp-table tr:last-child td{ border-bottom:none; }
.qp-table td.tag{ color:var(--signal); }
.qp-foot{ padding:10px 16px; font-family:'IBM Plex Mono',monospace; font-size:11.5px; color:var(--text-muted); }

/* ---------- sections ---------- */
section{ padding:64px 0; }
.section-head{ max-width:640px; margin-bottom:40px; }
.section-head h2{ font-size:clamp(24px,3vw,34px); }

/* course cards */
.course-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.course-card{
  background:var(--card); border:1px solid var(--card-line); border-radius:12px;
  overflow:hidden; display:flex; flex-direction:column; gap:10px;
  transition:border-color .15s ease, transform .15s ease;
}
.course-card:hover{ border-color:var(--signal); transform:translateY(-3px); }
.course-card .banner{
  width:100%; height:150px; object-fit:cover; display:block;
  border-bottom:1px solid var(--card-line);
}
.course-card .banner-fallback{
  width:100%; height:150px; display:flex; align-items:center; justify-content:center;
  background:
    linear-gradient(135deg, rgba(47,191,154,.14), rgba(242,166,90,.10)),
    repeating-linear-gradient(90deg, transparent, transparent 27px, rgba(255,255,255,.035) 27px, rgba(255,255,255,.035) 28px);
  border-bottom:1px solid var(--card-line);
  font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--text-muted);
}
.course-card .card-body{ padding:20px 24px 24px; display:flex; flex-direction:column; gap:10px; flex:1; }
.course-card .idx{ font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--text-muted); }
.course-card h3{ font-size:19px; margin-bottom:2px; }
.course-card p{ font-size:14px; margin-bottom:6px; }
.course-meta{ display:flex; gap:10px; flex-wrap:wrap; margin:6px 0 14px; }
.chip{
  font-family:'IBM Plex Mono',monospace; font-size:11px; padding:4px 9px;
  border:1px solid var(--card-line); border-radius:999px; color:var(--text-muted);
}
.course-card .cfoot{ margin-top:auto; display:flex; align-items:center; justify-content:space-between; }
.course-card .fee{ font-family:'Space Grotesk',sans-serif; color:var(--amber); font-weight:600; }

/* why us / steps */
.why-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.why-item{ padding:22px; border:1px solid var(--card-line); border-radius:12px; background:var(--ink-mid); }
.why-item .n{ font-family:'IBM Plex Mono',monospace; color:var(--signal); font-size:13px; margin-bottom:10px; display:block; }
.why-item h4{ font-size:16.5px; }
.why-item p{ font-size:13.6px; margin:0; }

.cta-band{
  background:linear-gradient(120deg, var(--card) 0%, var(--ink-mid) 100%);
  border:1px solid var(--card-line);
  border-radius:16px; padding:44px; text-align:center;
}
.cta-band h2{ margin-bottom:10px; }
.cta-band p{ max-width:520px; margin:0 auto 22px; }
.contact-phone{
  margin-top:22px; display:flex; align-items:center; justify-content:center; gap:10px;
  font-family:'IBM Plex Mono',monospace; font-size:14.5px; color:var(--text-muted);
}
.contact-phone a{ color:var(--text); font-weight:600; }
.contact-phone a:hover{ color:var(--signal); }
.contact-phone .sep{ color:var(--card-line); }

/* ---------- auth pages ---------- */
.auth-wrap{
  min-height:calc(100vh - 140px);
  display:flex; align-items:center; justify-content:center;
  padding:60px 20px;
}
.auth-card{
  width:100%; max-width:420px;
  background:var(--card); border:1px solid var(--card-line);
  border-radius:14px; padding:36px 32px;
}
.auth-card h1{ font-size:24px; margin-bottom:6px; }
.auth-card .sub{ font-size:14px; margin-bottom:26px; }
.auth-foot{ font-size:13.5px; text-align:center; margin-top:14px; color:var(--text-muted); }

/* ---------- footer ---------- */
.site-footer{ border-top:1px solid var(--card-line); padding:40px 0 26px; margin-top:40px; }
.foot-grid{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px; margin-bottom:26px; }
.foot-brand p{ max-width:280px; font-size:13.5px; }
.foot-cols{ display:flex; gap:56px; flex-wrap:wrap; }
.foot-col h5{ font-family:'IBM Plex Mono',monospace; font-size:11.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--text-muted); margin-bottom:12px; }
.foot-col a{ display:block; color:var(--text-muted); font-size:13.8px; margin-bottom:9px; }
.foot-col a:hover{ color:var(--signal); }
.foot-bottom{ border-top:1px solid var(--card-line); padding-top:18px; font-size:12.5px; color:var(--text-muted); display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px; }

/* ---------- admin ---------- */
.admin-shell{ display:grid; grid-template-columns:240px 1fr; min-height:100vh; }
.admin-side{ background:var(--ink-mid); border-right:1px solid var(--card-line); padding:22px 18px; }
.admin-side .brand{ margin-bottom:28px; font-size:18px; }
.admin-side nav a{
  display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:8px;
  color:var(--text-muted); font-size:14px; font-weight:500; margin-bottom:4px;
}
.admin-side nav a:hover, .admin-side nav a.active{ background:var(--card); color:var(--text); text-decoration:none; }
.admin-side nav a.active{ color:var(--signal); }
.admin-main{ padding:30px 36px; }
.admin-top{ display:flex; justify-content:space-between; align-items:center; margin-bottom:26px; flex-wrap:wrap; gap:12px; }
.admin-top h1{ font-size:24px; margin:0; }
.stat-cards{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:30px; }
.stat-card{ background:var(--card); border:1px solid var(--card-line); border-radius:12px; padding:18px 20px; }
.stat-card .lbl{ font-family:'IBM Plex Mono',monospace; font-size:11.5px; color:var(--text-muted); text-transform:uppercase; }
.stat-card .val{ font-family:'Space Grotesk',sans-serif; font-size:26px; margin-top:6px; }

.data-table{ width:100%; border-collapse:collapse; background:var(--card); border:1px solid var(--card-line); border-radius:12px; overflow:hidden; }
.data-table th{ text-align:left; padding:12px 16px; background:var(--ink-mid); font-size:11.5px; text-transform:uppercase; letter-spacing:.04em; color:var(--text-muted); font-family:'IBM Plex Mono',monospace; }
.data-table td{ padding:13px 16px; border-top:1px solid var(--card-line); font-size:14px; }
.status-pill{ font-family:'IBM Plex Mono',monospace; font-size:11px; padding:3px 10px; border-radius:999px; }
.status-active{ background:rgba(47,191,154,.12); color:var(--signal); }
.status-inactive{ background:rgba(229,98,107,.12); color:var(--danger); }
.row-actions{ display:flex; gap:8px; }
.admin-form{ background:var(--card); border:1px solid var(--card-line); border-radius:12px; padding:26px; max-width:640px; }
.form-row-2{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.thumb{ width:52px; height:38px; object-fit:cover; border-radius:6px; border:1px solid var(--card-line); display:block; }
.thumb-fallback{
  width:52px; height:38px; border-radius:6px; border:1px dashed var(--card-line);
  display:flex; align-items:center; justify-content:center; color:var(--text-muted); font-size:10px;
  font-family:'IBM Plex Mono',monospace;
}

/* ---------- enrollment type toggle ---------- */
.type-toggle{ display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:20px; }
.type-toggle input{ position:absolute; opacity:0; pointer-events:none; }
.type-toggle label{
  display:flex; flex-direction:column; gap:2px; cursor:pointer;
  background:var(--ink-mid); border:1px solid var(--card-line); border-radius:10px;
  padding:14px 16px; margin:0; font-weight:600; font-size:14.5px; color:var(--text);
  transition:border-color .15s ease, background .15s ease;
}
.type-toggle label span.sub{ font-weight:400; font-size:12.5px; color:var(--text-muted); }
.type-toggle input:checked + label{ border-color:var(--signal); background:rgba(47,191,154,.08); }
.type-toggle input:focus-visible + label{ outline:2px solid var(--signal); outline-offset:2px; }

.enroll-course-banner{
  display:flex; align-items:center; gap:14px; background:var(--ink-mid);
  border:1px solid var(--card-line); border-radius:10px; padding:14px 16px; margin-bottom:24px;
}
.enroll-course-banner img{ width:64px; height:48px; object-fit:cover; border-radius:6px; flex-shrink:0; }
.enroll-course-banner .fb{ width:64px; height:48px; border-radius:6px; background:rgba(47,191,154,.12); flex-shrink:0; }
.enroll-course-banner h4{ font-size:15.5px; margin:0 0 2px; }
.enroll-course-banner span{ font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--text-muted); }

/* ---------- responsive ---------- */
@media (max-width: 920px){
  .hero-grid{ grid-template-columns:1fr; }
  .course-grid{ grid-template-columns:repeat(2,1fr); }
  .why-grid{ grid-template-columns:repeat(2,1fr); }
  .admin-shell{ grid-template-columns:1fr; }
  .admin-side{ display:none; }
}
@media (max-width: 640px){
  .nav-links{ display:none; }
  .nav-toggle{ display:inline-flex; }
  .course-grid{ grid-template-columns:1fr; }
  .why-grid{ grid-template-columns:1fr; }
  .stat-cards{ grid-template-columns:repeat(2,1fr); }
  .form-row-2{ grid-template-columns:1fr; }
  .cta-band{ padding:30px 22px; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; }
}