/* ===== מערכות תקשוב – סביבת תרגול | עיצוב כללי RTL ===== */
:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --card: #1e293b;
  --card-hover: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #38bdf8;
  --primary-dark: #0ea5e9;
  --accent: #a78bfa;
  --ok: #22c55e;
  --ok-soft: rgba(34, 197, 94, 0.15);
  --bad: #ef4444;
  --bad-soft: rgba(239, 68, 68, 0.15);
  --warn: #f59e0b;
  --border: #334155;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #1e3a5f33, transparent), var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Assistant", "Rubik", system-ui, sans-serif;
  line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px 18px 80px; }

/* ---- Header ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: 1100px; margin: 0 auto; padding: 14px 18px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; }
.brand .logo { font-size: 1.6rem; }
.site-header nav { margin-inline-start: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.site-header nav a {
  padding: 7px 14px; border-radius: 999px; color: var(--text);
  border: 1px solid var(--border); font-size: .95rem;
}
.site-header nav a:hover { background: var(--card-hover); text-decoration: none; }

/* ---- Hero ---- */
.hero { text-align: center; padding: 30px 0 10px; }
.hero h1 { font-size: 2.1rem; margin: 0 0 8px; }
.hero p { color: var(--muted); max-width: 680px; margin: 0 auto; }

/* ---- Section titles ---- */
.section-title { font-size: 1.4rem; margin: 36px 0 16px; display: flex; align-items: center; gap: 10px; }
.section-title .bar { width: 6px; height: 26px; background: linear-gradient(var(--primary), var(--accent)); border-radius: 4px; }

/* ---- Cards grid ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.topic-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow); transition: transform .15s, border-color .15s;
  display: flex; flex-direction: column; gap: 10px; position: relative;
}
.topic-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.topic-card.locked { opacity: .55; }
.topic-card .icon { font-size: 2rem; }
.topic-card h3 { margin: 0; font-size: 1.2rem; }
.topic-card p { margin: 0; color: var(--muted); font-size: .95rem; flex: 1; }
.topic-card .actions { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.badge-soon {
  position: absolute; inset-inline-end: 14px; top: 14px; font-size: .72rem;
  background: var(--warn); color: #1a1300; padding: 2px 9px; border-radius: 999px; font-weight: 700;
}
.progress-pill { font-size: .8rem; color: var(--muted); }
.progress-pill b { color: var(--ok); }
.bar-track { height: 7px; background: #0b1220; border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); width: 0; transition: width .4s; }

/* ---- Buttons ---- */
.btn {
  cursor: pointer; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text);
  padding: 9px 16px; border-radius: 10px; font-size: .95rem; font-weight: 600; font-family: inherit;
  transition: background .15s, border-color .15s, transform .05s;
}
.btn:hover { background: var(--card-hover); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); color: #04222f; border: none; }
.btn.primary:hover { filter: brightness(1.07); }
.btn.ghost { background: transparent; }
.btn.accent { background: linear-gradient(120deg, #7c3aed, var(--accent)); color: #fff; border: none; }

/* ---- Mikud 2026 banner ---- */
.mikud-banner{
  display:flex;align-items:center;gap:18px;margin:6px 0 10px;padding:18px 22px;
  border-radius:var(--radius);text-decoration:none;color:var(--text);
  background:linear-gradient(120deg,#5b21b6,#7c3aed 45%,#0ea5e9);
  border:1px solid #8b5cf6;box-shadow:var(--shadow);transition:transform .15s,filter .15s;
}
.mikud-banner:hover{transform:translateY(-2px);filter:brightness(1.06);text-decoration:none}
.mikud-banner .mb-icon{font-size:2.6rem;line-height:1}
.mikud-banner .mb-text{display:flex;flex-direction:column;gap:3px;font-size:.95rem;color:#ede9fe}
.mikud-banner .mb-text strong{font-size:1.2rem;color:#fff}
.mikud-banner .mb-cta{margin-inline-start:auto;white-space:nowrap;font-weight:800;background:#fff;color:#5b21b6;padding:10px 18px;border-radius:999px}
@media(max-width:560px){.mikud-banner{flex-wrap:wrap}.mikud-banner .mb-cta{margin-inline-start:0}}

/* ---- YouTube block ---- */
.yt-block { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.yt-block .yt-frame { position: relative; padding-top: 56.25%; border-radius: 12px; overflow: hidden; margin-top: 12px; }
.yt-block .yt-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---- Quiz ---- */
.quiz-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.quiz-head h1 { margin: 0; font-size: 1.6rem; }
.quiz-meta { color: var(--muted); margin-bottom: 18px; }
.progress-line { display: flex; align-items: center; gap: 12px; margin: 10px 0 22px; }
.progress-line .bar-track { flex: 1; }

.q-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); margin-bottom: 22px;
}
.q-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 6px; }
.q-num { font-weight: 800; color: var(--primary); }
.q-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tag { font-size: .72rem; padding: 2px 9px; border-radius: 999px; background: var(--bg-soft); border: 1px solid var(--border); color: var(--muted); }
.q-prompt { font-size: 1.12rem; margin: 8px 0 14px; }
.q-prompt code, .q-prompt pre, .a-text code, .a-text pre, .fb code, .fb pre {
  direction: ltr; text-align: left; font-family: "Consolas", "Courier New", monospace;
}
.q-prompt code, .a-text code { background: #0b1220; padding: 1px 6px; border-radius: 6px; color: #7dd3fc; }
pre { background: #0b1220; border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; overflow-x: auto; color: #cbd5e1; }

/* choices */
.choices { display: flex; flex-direction: column; gap: 10px; }
.choice {
  display: flex; gap: 12px; align-items: flex-start; text-align: start;
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--bg-soft); cursor: pointer; transition: border-color .12s, background .12s; font: inherit; color: inherit; width: 100%;
}
.choice:hover:not(.disabled) { border-color: var(--primary); }
.choice .key { font-weight: 800; color: var(--accent); min-width: 1.4em; }
.choice.disabled { cursor: default; }
.choice.correct { border-color: var(--ok); background: var(--ok-soft); }
.choice.incorrect { border-color: var(--bad); background: var(--bad-soft); }
.choice .mark { margin-inline-start: auto; font-weight: 800; }
.choice-fb { font-size: .9rem; color: var(--muted); margin: 4px 0 0; padding-inline-start: 2.6em; }

/* fill blanks */
.blank-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 8px 0; }
.blank-row .prefix { direction: ltr; font-family: "Consolas", monospace; background: #0b1220; padding: 6px 10px; border-radius: 8px; color: #cbd5e1; }
.blank-row input {
  direction: ltr; font-family: "Consolas", monospace; background: #0b1220; color: #7dd3fc;
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; min-width: 130px; font-size: .95rem;
}
.blank-row input.ok { border-color: var(--ok); }
.blank-row input.no { border-color: var(--bad); }
.blank-hint { font-size: .8rem; color: var(--muted); }

/* open answer */
.open-input { width: 100%; min-height: 90px; resize: vertical; background: #0b1220; color: var(--text); border: 1px solid var(--border); border-radius: 10px; padding: 12px; font: inherit; }
.model-answer { margin-top: 12px; padding: 14px; border: 1px dashed var(--accent); border-radius: 12px; background: rgba(167,139,250,.08); }
.model-answer h4 { margin: 0 0 6px; color: var(--accent); }
.self-grade { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; align-items: center; }

/* feedback */
.fb { margin-top: 14px; padding: 14px; border-radius: 12px; border: 1px solid var(--border); }
.fb.good { border-color: var(--ok); background: var(--ok-soft); }
.fb.bad { border-color: var(--bad); background: var(--bad-soft); }
.fb h4 { margin: 0 0 6px; }
.explain-panel { margin-top: 12px; padding: 16px; border-radius: 12px; background: var(--bg-soft); border: 1px solid var(--accent); }
.explain-panel h3, .explain-panel h4 { color: var(--accent); margin-top: 0; }
.q-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

/* topology */
.topo-wrap { background: #0b1220; border: 1px solid var(--border); border-radius: 12px; padding: 10px; margin: 12px 0; }
.topo-wrap svg { width: 100%; height: auto; display: block; }

/* summary */
.summary-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.score-big { font-size: 3rem; font-weight: 800; }
.score-big.pass { color: var(--ok); }
.score-big.fail { color: var(--bad); }
.summary-table { width: 100%; border-collapse: collapse; margin-top: 16px; }
.summary-table th, .summary-table td { padding: 9px 10px; border-bottom: 1px solid var(--border); text-align: start; }
.summary-table th { color: var(--muted); font-weight: 600; }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 50%; }
.dot.ok { background: var(--ok); } .dot.no { background: var(--bad); } .dot.partial { background: var(--warn); }

/* misc */
.notice { font-size: .85rem; color: var(--muted); border-inline-start: 3px solid var(--warn); padding: 6px 12px; margin: 10px 0; background: rgba(245,158,11,.08); border-radius: 6px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.hidden { display: none !important; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
footer.site-footer { text-align: center; color: var(--muted); padding: 30px 0; font-size: .85rem; border-top: 1px solid var(--border); margin-top: 40px; }

@media (max-width: 560px) {
  .hero h1 { font-size: 1.6rem; }
  .q-card, .summary-card { padding: 16px; }
}