/* ==========================================================================
   PIEDRA ARTE ACADEMIA — Hoja de estilos compartida
   Paleta: grafito / cobre / rojo seguridad. Tipografía: Oswald / Inter / Space Mono.
   Estilo: industrial, tipo plano técnico (blueprint).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

:root{
  --graphite:#1a1d1f;
  --graphite-2:#232729;
  --graphite-3:#2b3033;
  --paper:#f5f0e8;
  --copper:#c17f3e;
  --steel:#4a5568;
  --mist:#8a9199;
  --safety:#d4472e;
  --success:#5a9c6e;
  --warning:#d4a13d;
  --line: rgba(245,240,232,0.12);
  --line-strong: rgba(245,240,232,0.22);
}

*{box-sizing:border-box; margin:0; padding:0;}
button, input:not([type="checkbox"]):not([type="radio"]), select, textarea{ font-family:inherit; color:inherit; -webkit-appearance:none; -moz-appearance:none; appearance:none; border-radius:0; }
button{ background:none; border:none; }
input[type="checkbox"], input[type="radio"]{ accent-color:var(--copper); }
html{scroll-behavior:smooth; background:var(--graphite);}
body{
  background-color:#1a1d1f;
  background:var(--graphite);
  color:var(--paper);
  font-family:'Inter', sans-serif;
  line-height:1.6;
  overflow-x:hidden;
  min-height:100vh;
  position:relative;
}
h1,h2,h3,h4,.display{
  font-family:'Oswald', sans-serif;
  text-transform:uppercase;
  letter-spacing:0.02em;
  line-height:1.1;
}
h4{ font-size:15px; letter-spacing:0.04em; color:var(--copper); }
.mono{ font-family:'Space Mono', monospace; }
a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}
.wrap{max-width:1120px; margin:0 auto; padding:0 24px;}
.wrap-narrow{max-width:760px; margin:0 auto; padding:0 24px;}
ul{list-style:none;}

.grid-bg{
  position:absolute; inset:0; z-index:0; pointer-events:none; height:100%;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:48px 48px;
  opacity:0.5;
}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:'Oswald'; text-transform:uppercase; letter-spacing:0.05em; font-size:13px; font-weight:600;
  padding:13px 22px; border:1px solid transparent; cursor:pointer; transition:all .2s ease;
  background:none; text-align:center;
}
.btn-lg{ padding:16px 28px; font-size:14px; }
.btn-sm{ padding:8px 14px; font-size:11.5px; }
.btn-primary{ background:var(--safety); color:var(--paper); border-color:var(--safety); }
.btn-primary:hover{ background:transparent; color:var(--safety); }
.btn-copper{ background:var(--copper); color:var(--graphite); border-color:var(--copper); }
.btn-copper:hover{ background:transparent; color:var(--copper); }
.btn-ghost{ background:transparent; color:var(--paper); border-color:var(--line-strong); }
.btn-ghost:hover{ border-color:var(--copper); color:var(--copper); }
.btn-block{ width:100%; }
.btn:disabled{ opacity:0.4; cursor:not-allowed; }
button{ font-family:inherit; }

/* ---------- NAVBAR ---------- */
header.site-header{
  position:sticky; top:0; z-index:50;
  background:rgb(24,27,29);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 24px; max-width:1120px; margin:0 auto;
}
.brand{ display:flex; align-items:center; gap:10px; font-family:'Oswald'; font-weight:600; letter-spacing:0.04em; font-size:15px; }
.brand .dot{ width:8px; height:8px; background:var(--copper); border-radius:1px; transform:rotate(45deg); flex-shrink:0; }
.nav-links{ display:flex; align-items:center; gap:28px; }
.nav-links a{ font-family:'Space Mono'; font-size:12.5px; color:var(--mist); letter-spacing:0.02em; }
.nav-links a:hover{ color:var(--copper); }
.nav-actions{ display:flex; align-items:center; gap:12px; }
.nav-burger{
  display:none; flex-direction:column; gap:4px; background:none; border:none; cursor:pointer; padding:8px;
}
.nav-burger span{ width:22px; height:2px; background:var(--paper); display:block; }
.mobile-menu{
  display:none; flex-direction:column; background:var(--graphite-2); border-bottom:1px solid var(--line);
  padding:8px 24px 20px;
}
.mobile-menu.open{ display:flex; }
.mobile-menu[hidden]{ display:none; }
.mobile-menu a{
  padding:14px 0; border-bottom:1px solid var(--line); font-family:'Space Mono'; font-size:13px; color:var(--paper);
}
.mobile-menu .btn{ margin-top:14px; }

@media(max-width:860px){
  .nav-links, .nav-actions .btn-ghost{ display:none; }
  .nav-burger{ display:flex; }
}

/* ---------- SECTIONS ---------- */
.section{ position:relative; z-index:1; padding:80px 0; border-bottom:1px solid var(--line); background:var(--graphite); }
.section-tight{ padding:56px 0; }
.section-alt{ background:var(--graphite-2); }
.section-tag{ font-family:'Space Mono'; font-size:12px; color:var(--copper); letter-spacing:0.08em; margin-bottom:12px; display:block; }
.section h2{ font-size:clamp(26px,3.2vw,40px); margin-bottom:16px; max-width:680px; }
.section-sub{ color:var(--mist); max-width:580px; font-size:15.5px; margin-bottom:40px; }

/* ---------- HERO ---------- */
.hero{ position:relative; z-index:1; padding:80px 0 56px; border-bottom:1px solid var(--line); background:var(--graphite); }
.hero-grid{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:48px; align-items:center; }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family:'Space Mono'; font-size:12px; color:var(--copper);
  border:1px solid rgba(193,127,62,0.4); padding:6px 12px; letter-spacing:0.05em; margin-bottom:22px;
}
.eyebrow::before{ content:'●'; font-size:8px; }
h1.hero-title{ font-size:clamp(34px, 4.6vw, 58px); font-weight:700; margin-bottom:18px; }
h1.hero-title .accent{ color:var(--copper); }
.hero-sub{ font-size:16.5px; color:var(--mist); max-width:480px; margin-bottom:28px; }
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:26px; }
.hero-meta{ display:flex; gap:26px; flex-wrap:wrap; font-family:'Space Mono'; font-size:12px; color:var(--mist); }
.hero-meta strong{ color:var(--paper); display:block; font-size:20px; font-family:'Oswald'; }

.diagram-card{ background:var(--graphite-2); border:1px solid var(--line); padding:18px; }
.diagram-label{ font-family:'Space Mono'; font-size:11px; color:var(--mist); display:flex; justify-content:space-between; margin-bottom:12px; letter-spacing:0.03em; }
.diagram-label span:first-child{ color:var(--copper); }
svg.tech{ width:100%; height:auto; display:block; }
.dim-line{ stroke:var(--mist); stroke-width:1; }
.dim-text{ font-family:'Space Mono'; font-size:11px; fill:var(--mist); }
.edge-label{ font-family:'Space Mono'; font-size:10px; fill:var(--copper); }

/* ---------- VENTAJAS ---------- */
.ventajas-grid{ display:grid; grid-template-columns:1fr 1fr; gap:0; border:1px solid var(--line); }
.ventaja-item{ display:flex; gap:16px; padding:20px 24px; border-bottom:1px solid var(--line); border-right:1px solid var(--line); }
.ventaja-item:nth-child(2n){ border-right:none; }
.ventaja-item.highlight{ background:rgba(193,127,62,0.08); }
.ventaja-check{
  flex-shrink:0; width:22px; height:22px; border:1px solid var(--copper);
  display:flex; align-items:center; justify-content:center; font-family:'Space Mono'; font-size:12px; color:var(--copper); margin-top:2px;
}
.ventaja-item p{ font-size:14.5px; color:var(--paper); }
.ventaja-item p strong{ font-family:'Oswald'; font-weight:500; text-transform:uppercase; font-size:13px; letter-spacing:0.02em; display:block; margin-bottom:4px; }
@media(max-width:720px){ .ventajas-grid{ grid-template-columns:1fr; } .ventaja-item{ border-right:none !important; } }

/* ---------- FOTO DEL INSTRUCTOR ---------- */
.instructor-photo{
  position:relative;
  aspect-ratio:4/5;
  background:var(--graphite-2);
  border:1px solid var(--line);
  padding:12px;
  overflow:hidden;
}
.instructor-photo img{
  width:100%; height:100%; object-fit:cover; object-position:center 25%;
  display:block;
  filter:grayscale(18%) contrast(1.04);
}
.instructor-photo::after{
  /* Marco interior tipo plano técnico */
  content:'';
  position:absolute; inset:12px;
  border:1px solid rgba(193,127,62,0.35);
  pointer-events:none;
}
.instructor-photo-tag{
  position:absolute; bottom:20px; left:20px; z-index:2;
  font-family:'Space Mono'; font-size:10px; letter-spacing:0.05em;
  color:var(--paper);
  background:rgba(26,29,31,0.85);
  border-left:2px solid var(--copper);
  padding:5px 10px;
}

/* ---------- PROBLEM CARDS ---------- */
.problem-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.problem-card{ background:var(--graphite); padding:30px 26px; }
.problem-card .num{ font-family:'Space Mono'; color:var(--steel); font-size:13px; margin-bottom:14px; display:block; }
.problem-card h3{ font-size:18px; margin-bottom:10px; text-transform:none; letter-spacing:0; }
.problem-card p{ color:var(--mist); font-size:14px; }
@media(max-width:760px){ .problem-grid{ grid-template-columns:1fr; } }

/* ---------- BLUEPRINT SHEET / TEMARIO ---------- */
.sheet{ border:1px solid var(--line); background:var(--graphite-2); }
.sheet-head{ display:flex; justify-content:space-between; align-items:center; padding:16px 24px; border-bottom:1px solid var(--line); font-family:'Space Mono'; font-size:12px; color:var(--mist); flex-wrap:wrap; gap:6px; }
.module{ display:grid; grid-template-columns:80px 1fr 180px; border-bottom:1px solid var(--line); transition:background .2s ease; }
.module:last-child{ border-bottom:none; }
.module:hover{ background:rgba(193,127,62,0.05); }
.module-num{ font-family:'Oswald'; font-size:30px; font-weight:600; color:var(--steel); display:flex; align-items:center; justify-content:center; border-right:1px solid var(--line); padding:18px 0; }
.module:hover .module-num{ color:var(--copper); }
.module-body{ padding:20px 22px; }
.module-body h3{ font-size:16px; text-transform:none; letter-spacing:0; margin-bottom:6px; }
.module-body p{ color:var(--mist); font-size:13px; }
.module-meta{ padding:20px 22px; border-left:1px solid var(--line); font-family:'Space Mono'; font-size:11px; color:var(--mist); display:flex; flex-direction:column; justify-content:center; gap:6px; }
.module-meta .tag{ color:var(--copper); }
.topic-list{ list-style:none; margin-top:10px; display:grid; grid-template-columns:1fr 1fr; gap:4px 20px; }
.topic-list li{ font-size:12.5px; color:var(--paper); padding-left:16px; position:relative; }
.topic-list li::before{ content:'—'; position:absolute; left:0; color:var(--steel); }
.topic-link{ color:var(--paper); transition:color .15s ease; }
.topic-link:hover{ color:var(--copper); text-decoration:underline; text-underline-offset:2px; }
@media(max-width:720px){
  .module{ grid-template-columns:50px 1fr; }
  .module-meta{ grid-column:2; border-left:none; border-top:1px solid var(--line); }
  .module-num{ font-size:20px; }
  .topic-list{ grid-template-columns:1fr; }
}

/* ---------- DATA TABLES (alumnos, lecciones, recursos, inscripciones) ---------- */
.table-scroll{ overflow-x:auto; border:1px solid var(--line); }
table.data-table{ width:100%; border-collapse:collapse; min-width:640px; }
table.data-table thead th{
  font-family:'Space Mono'; font-size:11px; text-transform:uppercase; letter-spacing:0.05em; color:var(--copper);
  text-align:left; padding:12px 16px; border-bottom:1px solid var(--line-strong); background:var(--graphite-2);
}
table.data-table tbody td{
  padding:14px 16px; border-bottom:1px solid var(--line); font-size:13.5px; color:var(--paper);
}
table.data-table tbody tr:hover{ background:rgba(193,127,62,0.05); }
table.data-table tbody tr:last-child td{ border-bottom:none; }

.pill{ display:inline-block; font-family:'Space Mono'; font-size:11px; padding:4px 10px; border:1px solid; letter-spacing:0.02em; }
.pill-success{ color:var(--success); border-color:var(--success); background:rgba(90,156,110,0.1); }
.pill-warning{ color:var(--warning); border-color:var(--warning); background:rgba(212,161,61,0.1); }
.pill-locked{ color:var(--mist); border-color:var(--line-strong); background:rgba(138,145,153,0.08); }
.pill-danger{ color:var(--safety); border-color:var(--safety); background:rgba(212,71,46,0.1); }

/* ---------- PROGRESS BAR ---------- */
.progress-track{ width:100%; height:6px; background:var(--graphite-3); border:1px solid var(--line); overflow:hidden; }
.progress-fill{ height:100%; background:var(--copper); transition:width .3s ease; }

/* ---------- CARDS / STATS ---------- */
.card{ background:var(--graphite-2); border:1px solid var(--line); padding:24px; }
.stat-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.stat-card{ background:var(--graphite); padding:22px 20px; }
.stat-card .stat-label{ font-family:'Space Mono'; font-size:11px; color:var(--mist); text-transform:uppercase; letter-spacing:0.04em; margin-bottom:8px; }
.stat-card .stat-value{ font-family:'Oswald'; font-size:28px; color:var(--paper); }
.stat-card .stat-value.accent{ color:var(--copper); }
@media(max-width:760px){ .stat-grid{ grid-template-columns:1fr 1fr; } }

.action-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.action-item{ background:var(--graphite); padding:20px; display:flex; flex-direction:column; gap:8px; cursor:pointer; border:none; text-align:left; color:var(--paper); font-family:inherit; }
.action-item:hover{ background:rgba(193,127,62,0.06); }
.action-item .label{ font-family:'Oswald'; font-size:13px; letter-spacing:0.03em; text-transform:uppercase; }
.action-item .desc{ font-size:12px; color:var(--mist); }
@media(max-width:760px){ .action-grid{ grid-template-columns:1fr 1fr; } }
@media(max-width:520px){ .action-grid{ grid-template-columns:1fr; } }

/* ---------- RESOURCE CARDS ---------- */
.resource-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-bottom:32px; }
.resource-card{ background:var(--graphite-2); border:1px solid var(--line); padding:20px; display:flex; flex-direction:column; gap:10px; }
.resource-card .cat{ font-family:'Space Mono'; font-size:11px; color:var(--copper); }
.resource-card h3{ font-size:15px; text-transform:none; letter-spacing:0; }
@media(max-width:760px){ .resource-grid{ grid-template-columns:1fr 1fr; } }
@media(max-width:520px){ .resource-grid{ grid-template-columns:1fr; } }

/* ---------- FORMS ---------- */
.auth-shell{ min-height:100vh; display:flex; align-items:center; justify-content:center; padding:40px 20px; position:relative; z-index:1; }
.auth-card{ width:100%; max-width:440px; background:var(--graphite-2); border:1px solid var(--line); padding:36px 32px; }
.auth-card .brand{ margin-bottom:8px; }
.auth-card h1{ font-size:24px; margin:18px 0 6px; }
.auth-card .auth-sub{ color:var(--mist); font-size:13.5px; margin-bottom:28px; }
.form-group{ margin-bottom:18px; }
.form-group label{ display:block; font-family:'Space Mono'; font-size:11.5px; color:var(--mist); text-transform:uppercase; letter-spacing:0.04em; margin-bottom:8px; }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group select,
.form-group textarea{
  width:100%; background:var(--graphite); border:1px solid var(--line-strong); color:var(--paper);
  padding:12px 14px; font-family:'Inter'; font-size:14px;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus{ outline:none; border-color:var(--copper); }
.form-check{ display:flex; align-items:flex-start; gap:10px; font-size:12.5px; color:var(--mist); margin-bottom:20px; }
.form-check input{ margin-top:3px; accent-color:var(--copper); }
.field-error{ color:var(--safety); font-size:12px; margin-top:6px; display:none; }
.field-error.show{ display:block; }
.form-msg{ padding:12px 14px; font-size:13px; margin-bottom:18px; display:none; border:1px solid; }
.form-msg.show{ display:block; }
.form-msg.error{ color:var(--safety); border-color:var(--safety); background:rgba(212,71,46,0.08); }
.form-msg.success{ color:var(--success); border-color:var(--success); background:rgba(90,156,110,0.08); }
.auth-links{ margin-top:20px; text-align:center; font-size:13px; color:var(--mist); }
.auth-links a{ color:var(--copper); }

/* ---------- DASHBOARD LAYOUT ---------- */
.dash-shell{ display:grid; grid-template-columns:220px 1fr; min-height:calc(100vh - 65px); position:relative; z-index:1; }
.dash-side{ background:var(--graphite-2); border-right:1px solid var(--line); padding:24px 0; }
.dash-side a{ display:flex; align-items:center; gap:10px; padding:12px 24px; font-family:'Space Mono'; font-size:12.5px; color:var(--mist); border-left:2px solid transparent; }
.dash-side a:hover, .dash-side a.active{ color:var(--paper); border-left-color:var(--copper); background:rgba(193,127,62,0.06); }
.dash-main{ padding:36px 32px; }
.dash-main h1{ font-size:26px; margin-bottom:6px; }
.dash-welcome{ color:var(--mist); font-size:14px; margin-bottom:32px; }
@media(max-width:860px){
  .dash-shell{ grid-template-columns:1fr; }
  .dash-side{ display:flex; overflow-x:auto; border-right:none; border-bottom:1px solid var(--line); padding:12px 16px; }
  .dash-side a{ border-left:none; border-bottom:2px solid transparent; white-space:nowrap; padding:10px 14px; }
  .dash-side a:hover, .dash-side a.active{ border-left-color:transparent; border-bottom-color:var(--copper); }
  .dash-main{ padding:28px 20px; }
}

/* ---------- LESSON PAGE ---------- */
.lesson-shell{ display:grid; grid-template-columns:260px 1fr; position:relative; z-index:1; }
.lesson-side{ background:var(--graphite-2); border-right:1px solid var(--line); padding:20px 0; max-height:calc(100vh - 65px); overflow-y:auto; position:sticky; top:65px; align-self:start; }
.lesson-side .block-title{ font-family:'Space Mono'; font-size:11px; color:var(--copper); padding:14px 20px 6px; letter-spacing:0.04em; }
.lesson-side a{ display:block; padding:10px 20px; font-size:12.5px; color:var(--mist); border-left:2px solid transparent; }
.lesson-side a.active{ color:var(--paper); border-left-color:var(--copper); background:rgba(193,127,62,0.06); }
.lesson-main{ padding:36px 40px; max-width:820px; }
.lesson-crumb{ font-family:'Space Mono'; font-size:11.5px; color:var(--mist); margin-bottom:10px; }
.lesson-main h1{ font-size:28px; margin-bottom:18px; }
.video-frame{ background:var(--graphite-2); border:1px solid var(--line); aspect-ratio:16/9; display:flex; align-items:center; justify-content:center; margin-bottom:28px; color:var(--mist); font-family:'Space Mono'; font-size:13px; }
.lesson-block{ margin-bottom:28px; }
.lesson-block h2{ font-size:16px; text-transform:none; letter-spacing:0; color:var(--copper); margin-bottom:12px; border-bottom:1px solid var(--line); padding-bottom:8px; }
.lesson-block p{ color:var(--paper); font-size:14.5px; margin-bottom:10px; }
.lesson-block ul{ list-style:none; }
.lesson-block ul li{ font-size:14px; color:var(--paper); padding:6px 0 6px 18px; position:relative; border-bottom:1px solid var(--line); }
.lesson-block ul li::before{ content:'—'; position:absolute; left:0; color:var(--steel); }
.callout{ padding:14px 16px; border-left:3px solid; margin-bottom:12px; font-size:13.5px; background:var(--graphite-2); }
.callout.tip{ border-color:var(--success); }
.callout.warn{ border-color:var(--safety); }
.lesson-nav{ display:flex; justify-content:space-between; gap:12px; margin-top:36px; flex-wrap:wrap; }
@media(max-width:860px){ .lesson-shell{ grid-template-columns:1fr; } .lesson-side{ position:static; max-height:none; } .lesson-main{ padding:28px 20px; } }

/* ---------- FAQ ---------- */
.faq-item{ border-bottom:1px solid var(--line); padding:20px 0; }
.faq-q{
  display:flex; justify-content:space-between; align-items:center; width:100%; cursor:pointer;
  font-family:'Oswald'; font-size:15.5px; letter-spacing:0.01em;
  background:none; border:none; color:inherit; padding:0; text-align:left;
}
.faq-q::after{ content:'+'; color:var(--copper); font-size:20px; font-family:'Inter'; transition:transform .2s ease; }
.faq-item.open .faq-q::after{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .3s ease; color:var(--mist); font-size:14px; }
.faq-item.open .faq-a{ max-height:220px; padding-top:14px; }

/* ---------- PRICING ---------- */
.pricing-wrap{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); max-width:820px; }
.price-card{ background:var(--graphite); padding:36px 30px; position:relative; }
.price-card.featured{ background:var(--graphite-2); }
.price-card.featured::before{ content:'RECOMENDADO'; position:absolute; top:0; right:0; background:var(--copper); color:var(--graphite); font-family:'Space Mono'; font-size:10px; padding:5px 10px; letter-spacing:0.05em; }
.price-card h3{ font-size:17px; text-transform:none; letter-spacing:0; margin-bottom:6px; }
.price-card .price{ font-family:'Oswald'; font-size:38px; margin:14px 0; }
.price-card .price span{ font-size:13px; color:var(--mist); font-family:'Inter'; }
.price-card ul{ margin:18px 0 26px; }
.price-card li{ font-size:13px; color:var(--mist); padding:6px 0; padding-left:18px; position:relative; }
.price-card li::before{ content:'—'; position:absolute; left:0; color:var(--copper); }
@media(max-width:760px){ .pricing-wrap{ grid-template-columns:1fr; } }

/* ---------- CERTIFICATE ---------- */
.cert-shell{ max-width:900px; margin:60px auto; padding:0 20px; position:relative; z-index:1; }
.cert-card{ border:2px solid var(--copper); padding:56px 48px; background:var(--graphite-2); position:relative; }
.cert-card::before{ content:''; position:absolute; inset:10px; border:1px solid var(--line-strong); pointer-events:none; }
.cert-header{ text-align:center; margin-bottom:36px; }
.cert-header .brand{ justify-content:center; margin-bottom:18px; }
.cert-header .cert-label{ font-family:'Space Mono'; font-size:12px; color:var(--copper); letter-spacing:0.15em; }
.cert-body{ text-align:center; margin-bottom:36px; }
.cert-body .cert-name{ font-family:'Oswald'; font-size:34px; margin:14px 0; color:var(--copper); }
.cert-body p{ color:var(--paper); font-size:15px; line-height:1.7; }
.cert-meta{ display:flex; justify-content:space-between; border-top:1px solid var(--line); padding-top:24px; font-family:'Space Mono'; font-size:11.5px; color:var(--mist); flex-wrap:wrap; gap:12px; }
.cert-actions{ display:flex; gap:14px; justify-content:center; margin-top:32px; }
@media print{
  header, .cert-actions, .grid-bg{ display:none !important; }
  body{ background:#fff; color:#000; }
  .cert-card{ border-color:#c17f3e; background:#fff; }
  .cert-body p, .cert-meta{ color:#333; }
}

/* ---------- ADMIN ---------- */
.admin-tabs{ display:flex; gap:2px; margin-bottom:28px; flex-wrap:wrap; border:1px solid var(--line); }
.admin-tab{ background:var(--graphite-2); border:none; color:var(--mist); font-family:'Space Mono'; font-size:12px; padding:12px 18px; cursor:pointer; text-transform:uppercase; letter-spacing:0.04em; }
.admin-tab.active{ background:var(--copper); color:var(--graphite); }
.admin-panel{ display:none; }
.admin-panel.active{ display:block; }
.admin-toolbar{ display:flex; justify-content:space-between; align-items:center; margin-bottom:18px; gap:12px; flex-wrap:wrap; }
.admin-toolbar input[type="search"]{ background:var(--graphite-2); border:1px solid var(--line-strong); color:var(--paper); padding:10px 14px; font-size:13px; min-width:220px; }

/* ---------- FOOTER ---------- */
footer.site-footer{
  border-top:1px solid var(--line); padding:32px 0; text-align:center;
  font-family:'Space Mono'; font-size:12px; color:var(--mist); position:relative; z-index:1; background:var(--graphite);
}

/* ---------- FINAL CTA ---------- */
.final-cta{ text-align:center; padding:88px 0; position:relative; z-index:1; background:var(--graphite); }
.final-cta h2{ font-size:clamp(28px,3.8vw,44px); margin-bottom:18px; }
.final-cta p{ color:var(--mist); max-width:460px; margin:0 auto 32px; }

@media(max-width:860px){
  .hero-grid, .instructor{ grid-template-columns:1fr !important; }
  .problem-grid{ grid-template-columns:1fr; }
  .stat-grid{ grid-template-columns:1fr 1fr; }
}