@import url('https://fonts.googleapis.com/css2?family=Russo+One&family=Exo+2:ital,wght@0,400;0,600;0,700;1,400&family=Share+Tech+Mono&display=swap');

:root, [data-theme="dark"] {
  --bg: #030305;
  --bg-panel: #08080e;
  --bg-card: #0d0d17;
  --bg-input: #0a0a13;
  --border: #1d1f33;
  --text: #d9e1ee;
  --text-dim: #6e7890;
  --cyan: #00f0ff;
  --pink: #ff2e88;
  --green: #aaff00;
  --cyan-soft: rgba(0, 240, 255, 0.09);
  --pink-soft: rgba(255, 46, 136, 0.10);
  --green-soft: rgba(170, 255, 0, 0.08);
  --glow-cyan: 0 0 10px rgba(0, 240, 255, 0.45), 0 0 28px rgba(0, 240, 255, 0.15);
  --glow-pink: 0 0 10px rgba(255, 46, 136, 0.45), 0 0 28px rgba(255, 46, 136, 0.15);
  --glow-green: 0 0 10px rgba(170, 255, 0, 0.4), 0 0 24px rgba(170, 255, 0, 0.12);
  --scanline-opacity: 1;
  --aberration: -1.5px 0 0 rgba(0, 240, 255, 0.55), 1.5px 0 0 rgba(255, 46, 136, 0.55);
}

[data-theme="light"] {
  --bg: #eef0f6;
  --bg-panel: #ffffff;
  --bg-card: #f7f8fc;
  --bg-input: #ffffff;
  --border: #d3d8e6;
  --text: #171a26;
  --text-dim: #5d6680;
  --cyan: #0090a8;
  --pink: #d40f6e;
  --green: #4f9800;
  --cyan-soft: rgba(0, 144, 168, 0.10);
  --pink-soft: rgba(212, 15, 110, 0.08);
  --green-soft: rgba(79, 152, 0, 0.10);
  --glow-cyan: 0 0 0 rgba(0,0,0,0);
  --glow-pink: 0 0 0 rgba(0,0,0,0);
  --glow-green: 0 0 0 rgba(0,0,0,0);
  --scanline-opacity: 0.25;
  --aberration: none;
}

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

::selection { background: var(--pink); color: #fff; }

body {
  font-family: "Exo 2", -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
}
[data-theme="dark"] body, [data-theme="dark"] {
  background-image:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(0, 240, 255, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 90% 110%, rgba(255, 46, 136, 0.05), transparent);
}

.hidden { display: none !important; }

h1, h2, h3, h4 { font-family: "Russo One", "Exo 2", sans-serif; font-weight: 400; }
.mono { font-family: "Share Tech Mono", monospace; }

/* ---------- CRT scanlines ---------- */
.crt {
  position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  opacity: var(--scanline-opacity);
  background: repeating-linear-gradient(0deg,
    rgba(0, 0, 0, 0.13) 0px, rgba(0, 0, 0, 0.13) 1px,
    transparent 1px, transparent 3px);
  mix-blend-mode: multiply;
}
[data-theme="light"] .crt { background: repeating-linear-gradient(0deg, rgba(20,26,38,0.05) 0 1px, transparent 1px 3px); }

/* ---------- угловые срезы ---------- */
.cut, .btn, .module-card, .quiz-q, .login-box, .cert-form, .formula, .callout, .admin-table-wrap, .quiz-result {
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

/* ---------- glitch ---------- */
.glitch { position: relative; display: inline-block; }
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute; inset: 0; overflow: hidden;
  pointer-events: none;
}
.glitch::before { color: var(--cyan); animation: glitch-a 4s infinite steps(1); }
.glitch::after { color: var(--pink); animation: glitch-b 4s infinite steps(1); }
@keyframes glitch-a {
  0%, 91%, 100% { clip-path: inset(0 0 100% 0); transform: none; }
  92% { clip-path: inset(10% 0 55% 0); transform: translate(-3px, -1px); }
  94% { clip-path: inset(60% 0 12% 0); transform: translate(3px, 1px); }
  96% { clip-path: inset(30% 0 40% 0); transform: translate(-2px, 0); }
}
@keyframes glitch-b {
  0%, 90%, 100% { clip-path: inset(0 0 100% 0); transform: none; }
  93% { clip-path: inset(45% 0 25% 0); transform: translate(3px, 1px); }
  95% { clip-path: inset(15% 0 65% 0); transform: translate(-3px, -1px); }
  97% { clip-path: inset(70% 0 5% 0); transform: translate(2px, 0); }
}

/* ---------- иконки ---------- */
.icn { display: inline-flex; width: 20px; height: 20px; flex-shrink: 0; }
.icn svg { width: 100%; height: 100%; }
.icn-lg { width: 30px; height: 30px; }

/* ---------- layout ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 330px; flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  padding: 22px 14px;
  overflow-y: auto; height: 100vh;
  position: sticky; top: 0;
}

.brand { display: flex; gap: 12px; align-items: center; padding: 0 8px 14px; }
.brand .logo { width: 40px; height: 40px; color: var(--cyan); filter: drop-shadow(0 0 6px rgba(0,240,255,0.5)); }
.brand .logo svg { width: 100%; height: 100%; }
.brand h1 { font-size: 16px; letter-spacing: 0.06em; text-transform: uppercase; }
.brand p { font-family: "Share Tech Mono", monospace; font-size: 10.5px; color: var(--text-dim); letter-spacing: 0.08em; }

.hud-user {
  display: flex; align-items: center; gap: 8px;
  font-family: "Share Tech Mono", monospace;
  font-size: 11.5px; letter-spacing: 0.1em;
  color: var(--green);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  padding: 7px 10px; margin: 0 8px 16px;
  background: var(--bg-card);
}
.hud-user .pulse {
  width: 7px; height: 7px; background: var(--green); border-radius: 50%;
  box-shadow: var(--glow-green);
  animation: pulse 1.6s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

.progress-wrap { padding: 4px 8px 18px; }
.progress-label {
  display: flex; justify-content: space-between;
  font-family: "Share Tech Mono", monospace;
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 7px;
}
.progress-label .pct { color: var(--cyan); }
.progress-bar { height: 9px; background: var(--bg-card); border: 1px solid var(--border); padding: 1px; }
.progress-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  box-shadow: var(--glow-cyan);
  transition: width 0.4s ease;
}

.module-block { margin-bottom: 4px; }
.module-header {
  display: flex; align-items: center; gap: 10px;
  width: 100%; text-align: left;
  background: none; border: none; border-left: 3px solid transparent;
  color: var(--text);
  font-family: "Exo 2", sans-serif; font-size: 13.5px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.03em;
  padding: 9px 8px; cursor: pointer;
}
.module-header .m-icon { color: var(--cyan); }
.module-header:hover { background: var(--bg-card); border-left-color: var(--cyan); }
.module-header .chev { margin-left: auto; color: var(--text-dim); font-size: 10px; transition: transform 0.2s; }
.module-block.open .chev { transform: rotate(90deg); color: var(--cyan); }
.module-header.done .m-title::after { content: " ✓"; color: var(--green); text-shadow: var(--glow-green); }
.module-header.active { background: var(--cyan-soft); border-left-color: var(--cyan); color: var(--cyan); }

.module-items { display: none; padding: 2px 0 8px 16px; }
.module-block.open .module-items { display: block; }

.nav-item {
  display: flex; align-items: center; gap: 9px;
  width: 100%; text-align: left;
  background: none; border: none; border-left: 2px solid var(--border);
  color: var(--text-dim); font-family: "Exo 2", sans-serif; font-size: 13.5px;
  padding: 7px 10px; cursor: pointer;
}
.nav-item:hover { background: var(--bg-card); color: var(--text); border-left-color: var(--pink); }
.nav-item.active { background: var(--cyan-soft); color: var(--cyan); border-left-color: var(--cyan); }
.nav-item .dot { width: 6px; height: 6px; background: var(--border); flex-shrink: 0; transform: rotate(45deg); }
.nav-item.completed .dot { background: var(--green); box-shadow: var(--glow-green); }
.nav-item.quiz-link { font-weight: 600; }

.module-header.cert-link { border-top: 1px solid var(--border); margin-top: 10px; padding-top: 13px; }
.cert-state { margin-left: auto; color: var(--green); width: 16px; height: 16px; }
.cert-state.locked { color: var(--text-dim); }
.cert-state svg { width: 100%; height: 100%; }

/* ---------- topbar ---------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  position: sticky; top: 0; z-index: 50;
  font-family: "Share Tech Mono", monospace;
  font-size: 11.5px; letter-spacing: 0.1em;
}
.topbar .sys { color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar .sys b { color: var(--cyan); font-weight: 400; }
.topbar .spacer { flex: 1; }
.tg {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-dim); cursor: pointer;
  font-family: "Share Tech Mono", monospace; font-size: 11.5px; letter-spacing: 0.1em;
  padding: 6px 10px;
}
.tg:hover { color: var(--cyan); border-color: var(--cyan); box-shadow: var(--glow-cyan); }
.tg .icn { width: 15px; height: 15px; }
.tg .on { color: var(--cyan); }

/* ---------- content ---------- */
.content { max-width: 800px; margin: 0 auto; padding: 44px 40px 96px; width: 100%; }

.crumbs {
  font-family: "Share Tech Mono", monospace;
  font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.crumbs::before { content: "//"; color: var(--pink); }
.crumbs .icn { width: 15px; height: 15px; color: var(--cyan); }

.content h2 {
  font-size: 27px; margin-bottom: 22px; line-height: 1.3;
  text-transform: uppercase; letter-spacing: 0.02em;
  text-shadow: var(--aberration);
}
.content h3 { font-size: 18px; margin: 26px 0 10px; }
.content p { margin: 12px 0; }
.content ul { margin: 12px 0 12px 22px; }
.content li { margin: 7px 0; }
.content li::marker { color: var(--pink); }
.content strong { color: var(--text); font-weight: 700; }
[data-theme="dark"] .content strong { color: #fff; }
.content em { color: var(--green); font-style: normal; }
.content code {
  font-family: "Share Tech Mono", monospace;
  background: var(--bg-card); border: 1px solid var(--border);
  padding: 1px 6px; font-size: 0.88em; color: var(--cyan);
}

.formula {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  padding: 14px 18px;
  font-family: "Share Tech Mono", monospace;
  font-size: 14.5px;
  color: var(--text);
}

.callout {
  background: var(--cyan-soft);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-left: 3px solid var(--cyan);
  padding: 13px 17px; margin: 18px 0;
  font-size: 14px;
}
[data-theme="light"] .callout { border-color: rgba(0, 144, 168, 0.35); }
.callout::before {
  content: "▸ INSIGHT";
  display: block;
  font-family: "Share Tech Mono", monospace;
  font-size: 10.5px; letter-spacing: 0.18em;
  color: var(--cyan); margin-bottom: 4px;
}

/* ---------- кнопки ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text);
  font-family: "Exo 2", sans-serif;
  padding: 11px 20px; font-size: 12.5px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  cursor: pointer;
  transition: box-shadow 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); box-shadow: var(--glow-cyan); }
.btn.primary { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-soft); }
.btn.primary:hover { box-shadow: var(--glow-cyan); }
.btn.success { border-color: var(--green); color: var(--green); background: var(--green-soft); }
.btn.success:hover { box-shadow: var(--glow-green); color: var(--green); }
.btn.danger { border-color: var(--pink); color: var(--pink); background: var(--pink-soft); }
.btn.danger:hover { box-shadow: var(--glow-pink); color: var(--pink); }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: 0.4; cursor: default; }
.spacer { flex: 1; }

.lesson-footer {
  display: flex; align-items: center; gap: 12px;
  margin-top: 40px; padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

/* ---------- квиз ---------- */
.quiz-q {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px 22px; margin: 16px 0;
  position: relative;
}
.quiz-q h4 { font-family: "Exo 2", sans-serif; font-weight: 700; font-size: 15px; margin-bottom: 12px; }
.quiz-q h4 .qnum { font-family: "Share Tech Mono", monospace; color: var(--pink); margin-right: 6px; }
.quiz-opt {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 12px; margin: 6px 0;
  border: 1px solid var(--border);
  cursor: pointer; font-size: 14px;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.quiz-opt:hover { border-color: var(--cyan); }
.quiz-opt input { margin-top: 5px; accent-color: var(--cyan); }
.quiz-opt.sel { border-color: var(--cyan); background: var(--cyan-soft); box-shadow: var(--glow-cyan); }
.quiz-opt.right { border-color: var(--green); background: var(--green-soft); box-shadow: var(--glow-green); }
.quiz-opt.wrong { border-color: var(--pink); background: var(--pink-soft); box-shadow: var(--glow-pink); }

.quiz-explain {
  margin-top: 12px; padding: 10px 14px;
  font-size: 13.5px;
  background: var(--bg-panel); border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  color: var(--text-dim);
}

.quiz-result { padding: 20px 24px; margin: 24px 0; font-size: 16px; font-weight: 700; }
.quiz-result.pass { background: var(--green-soft); border: 1px solid var(--green); box-shadow: var(--glow-green); color: var(--green); }
.quiz-result.fail { background: var(--pink-soft); border: 1px solid var(--pink); box-shadow: var(--glow-pink); color: var(--pink); }
.quiz-result small { display: block; font-weight: 400; font-size: 13.5px; margin-top: 6px; color: var(--text-dim); }

/* ---------- главная ---------- */
.home-hero { margin-bottom: 34px; }
.home-hero h2 { font-size: 32px; text-shadow: var(--aberration); }
.home-hero p { color: var(--text-dim); font-size: 15.5px; max-width: 600px; }

.module-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px; cursor: pointer;
  text-align: left; color: var(--text);
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  position: relative;
}
.module-card:hover { border-color: var(--cyan); transform: translateY(-2px); box-shadow: var(--glow-cyan); }
.module-card .mc-icon { color: var(--cyan); width: 28px; height: 28px; display: block; }
.module-card .mc-icon svg { width: 100%; height: 100%; }
.module-card .mc-num {
  position: absolute; top: 14px; right: 16px;
  font-family: "Share Tech Mono", monospace; font-size: 11px;
  color: var(--text-dim); letter-spacing: 0.1em;
}
.module-card h3 { font-size: 14.5px; margin: 12px 0 8px; text-transform: uppercase; letter-spacing: 0.02em; }
.module-card .mc-meta { font-family: "Share Tech Mono", monospace; font-size: 11px; letter-spacing: 0.06em; color: var(--text-dim); }
.module-card .mc-done { color: var(--green); }
.module-card.done { border-color: rgba(170, 255, 0, 0.4); }

.cert-banner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  background: var(--green-soft);
  border: 1px solid var(--green);
  box-shadow: var(--glow-green);
  padding: 16px 20px; margin-bottom: 24px;
  font-weight: 700; font-size: 15px;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}
.cert-banner .icn { color: var(--green); width: 24px; height: 24px; vertical-align: -6px; margin-right: 8px; }

/* ---------- сертификат ---------- */
.cert-form { display: flex; gap: 12px; margin: 20px 0 28px; flex-wrap: wrap; padding: 4px; }
.cert-name-input, .text-input {
  flex: 1; min-width: 220px;
  padding: 11px 14px;
  border: 1px solid var(--border);
  background: var(--bg-input); color: var(--text);
  font-family: "Exo 2", sans-serif; font-size: 15px;
}
.cert-name-input:focus, .text-input:focus { outline: none; border-color: var(--cyan); box-shadow: var(--glow-cyan); }

.cert-preview canvas {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--border);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5), var(--glow-cyan);
}
.cert-todo { display: flex; flex-direction: column; gap: 4px; margin-top: 14px; }

/* ---------- логин ---------- */
.login-screen {
  position: fixed; inset: 0; z-index: 500;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 70% 50% at 30% 0%, rgba(0, 240, 255, 0.08), transparent),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(255, 46, 136, 0.08), transparent);
  padding: 20px;
}
.login-box {
  width: 100%; max-width: 420px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 38px 36px;
  position: relative;
}
.login-box::before, .login-box::after {
  content: ""; position: absolute; width: 22px; height: 22px; pointer-events: none;
}
.login-box::before { top: 8px; left: 8px; border-top: 2px solid var(--cyan); border-left: 2px solid var(--cyan); }
.login-box::after { bottom: 8px; right: 8px; border-bottom: 2px solid var(--pink); border-right: 2px solid var(--pink); }
.login-box .logo { width: 52px; height: 52px; color: var(--cyan); margin: 0 auto 16px; filter: drop-shadow(0 0 8px rgba(0,240,255,0.6)); }
.login-box .logo svg { width: 100%; height: 100%; }
.login-box h1 {
  text-align: center; font-size: 19px; letter-spacing: 0.12em;
  margin-bottom: 4px; text-shadow: var(--aberration);
}
.login-box .sub {
  text-align: center; font-family: "Share Tech Mono", monospace;
  font-size: 10.5px; color: var(--text-dim); letter-spacing: 0.2em;
  margin-bottom: 26px; text-transform: uppercase;
}
.login-box label {
  display: block; font-family: "Share Tech Mono", monospace;
  font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-dim); margin: 14px 0 5px;
}
.login-box input {
  width: 100%; padding: 11px 13px;
  border: 1px solid var(--border);
  background: var(--bg-input); color: var(--text);
  font-family: "Exo 2", sans-serif; font-size: 15px;
}
.login-box input:focus { outline: none; border-color: var(--cyan); box-shadow: var(--glow-cyan); }
.login-box .btn { width: 100%; margin-top: 22px; padding: 13px; }
.login-error {
  margin-top: 14px; text-align: center;
  font-family: "Share Tech Mono", monospace; font-size: 12px;
  color: var(--pink); letter-spacing: 0.08em;
  min-height: 18px;
}

/* ---------- админка ---------- */
.admin-table-wrap { background: var(--bg-card); border: 1px solid var(--border); padding: 6px; overflow-x: auto; margin: 20px 0; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table th {
  font-family: "Share Tech Mono", monospace; font-weight: 400;
  font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim);
  padding: 10px 8px; border-bottom: 1px solid var(--border);
  text-align: left; white-space: nowrap;
}
.admin-table td { padding: 9px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table .uname { font-weight: 700; }
.admin-table .uname .role { font-family: "Share Tech Mono", monospace; font-size: 10px; color: var(--pink); margin-left: 6px; }
.cellmark { font-family: "Share Tech Mono", monospace; font-size: 12px; display: block; line-height: 1.35; text-align: center; }
.cellmark.ok { color: var(--green); }
.cellmark.no { color: var(--text-dim); }
.status { font-family: "Share Tech Mono", monospace; font-size: 10.5px; letter-spacing: 0.1em; padding: 3px 8px; border: 1px solid; }
.status.done { color: var(--green); border-color: var(--green); background: var(--green-soft); }
.status.wip { color: var(--cyan); border-color: var(--cyan); background: var(--cyan-soft); }
.status.zero { color: var(--text-dim); border-color: var(--border); }
.admin-legend { font-family: "Share Tech Mono", monospace; font-size: 11px; color: var(--text-dim); letter-spacing: 0.05em; }
.link-del { background: none; border: none; color: var(--pink); cursor: pointer; font-family: "Share Tech Mono", monospace; font-size: 11px; letter-spacing: 0.08em; }
.link-del:hover { text-shadow: var(--glow-pink); }
.admin-msg { font-family: "Share Tech Mono", monospace; font-size: 12px; margin-top: 10px; min-height: 16px; }
.admin-msg.ok { color: var(--green); }
.admin-msg.err { color: var(--pink); }

@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; }
  .module-grid { grid-template-columns: 1fr; }
  .content { padding: 32px 18px 80px; }
  .topbar { padding: 10px 14px; gap: 8px; }
  .topbar .sys { display: none; }
}