:root {
	--bg: #070d18;
	--panel: #0f1726;
	--panel-2: #131e30;
	--garis: #1e2b40;
	--teks: #e7edf5;
	--teks-2: #9fb0c6;
	--teal: #2bb3a9;
	--teal-lembut: #123c3a;
	--amber: #f2a900;
	--ralat: #ff7b72;
	--radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
	margin: 0;
	background: radial-gradient(1200px 600px at 15% -10%, #0d2b33 0%, transparent 55%), var(--bg);
	color: var(--teks);
	font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
	font-size: 16px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.topbar { border-bottom: 1px solid var(--garis); background: rgba(7, 13, 24, 0.85); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 20; }
.topbar-dalam { max-width: 1180px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.jenama { display: inline-flex; align-items: center; gap: 10px; color: var(--teks); font-weight: 700; letter-spacing: -0.01em; }
.jenama:hover { text-decoration: none; }
.jenama-tanda { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: var(--teal-lembut); color: var(--teal); font-size: 13px; }
.titik { color: var(--amber); }
.topnav { display: flex; gap: 18px; font-size: 14.5px; }
.topnav a { color: var(--teks-2); }
.topnav a:hover { color: var(--teks); }

.shell { max-width: 1180px; margin: 0 auto; padding: 28px 20px 60px; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 36px; align-items: start; }

.sisi { position: sticky; top: 76px; }
.sisi-tajuk { margin: 0 0 10px; font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--teks-2); }
.sisi-senarai { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.sisi-senarai a { display: flex; gap: 10px; padding: 7px 10px; border-radius: 9px; color: var(--teks-2); font-size: 14px; border: 1px solid transparent; }
.sisi-senarai a:hover { background: var(--panel); color: var(--teks); text-decoration: none; }
.sisi-senarai a.aktif { background: var(--teal-lembut); border-color: #1d4f4c; color: var(--teks); }
.sisi-no { color: var(--amber); font-variant-numeric: tabular-nums; font-size: 12px; padding-top: 2px; }

.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 28px; align-items: center; margin-bottom: 40px; }
.hero-label { margin: 0 0 10px; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--teal); font-weight: 700; }
.hero h1 { margin: 0 0 14px; font-size: clamp(30px, 4.4vw, 44px); line-height: 1.08; letter-spacing: -0.025em; }
.hero-lead { margin: 0 0 12px; color: var(--teks-2); font-size: 17px; max-width: 46ch; }
.hero-nota { margin: 0; color: #7f92ab; font-size: 13.5px; }
.hero-imej { margin: 0; border-radius: 20px; overflow: hidden; border: 1px solid var(--garis); box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.9); }
.hero-imej img { display: block; width: 100%; height: auto; }

.bab-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); gap: 16px; }
.bab-kad { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--garis); border-radius: var(--radius); overflow: hidden; color: var(--teks); transition: transform 0.15s ease, border-color 0.15s ease; }
.bab-kad:hover { text-decoration: none; transform: translateY(-2px); border-color: #2a4a63; }
.bab-imej { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; opacity: 0.92; }
.bab-teks { display: grid; gap: 3px; padding: 13px 15px 16px; }
.bab-no { font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber); }
.bab-tajuk { font-weight: 650; letter-spacing: -0.01em; }
.bab-ringkas { font-size: 13.5px; color: var(--teks-2); line-height: 1.5; }
.bab-tanda { justify-self: start; margin-top: 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: #9fb0c6; border: 1px solid var(--garis); border-radius: 999px; padding: 1px 8px; }

.bab-kepala { margin-bottom: 18px; }
.bab-label { margin: 0 0 6px; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--amber); font-weight: 700; }
.bab-kepala h1 { margin: 0 0 8px; font-size: clamp(26px, 3.6vw, 36px); letter-spacing: -0.02em; }
.bab-ringkas-besar { margin: 0; color: var(--teks-2); font-size: 17px; }
.bab-imej-besar { margin: 0 0 22px; border-radius: 18px; overflow: hidden; border: 1px solid var(--garis); }
.bab-imej-besar img { display: block; width: 100%; height: auto; }
.teks { margin: 0 0 14px; color: #cdd8e6; }
.teks code, .nota-kaki code { background: #16233a; padding: 1px 5px; border-radius: 5px; font-size: 13.5px; }

.editor { margin: 30px 0 20px; border: 1px solid var(--garis); border-radius: var(--radius); background: var(--panel-2); overflow: hidden; }
.editor-baris { display: flex; justify-content: space-between; align-items: center; padding: 9px 12px; border-bottom: 1px solid var(--garis); font-size: 12.5px; color: var(--teks-2); }
.editor-alat { display: flex; gap: 8px; }
.btn-kecil { background: transparent; border: 1px solid var(--garis); color: var(--teks-2); border-radius: 7px; padding: 3px 9px; font-size: 12px; cursor: pointer; }
.btn-kecil:hover { color: var(--teks); border-color: #33506b; }
.kod { width: 100%; border: 0; resize: vertical; background: #0a1220; color: #d9e6f2; padding: 14px 16px; font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 13px; line-height: 1.6; tab-size: 4; }
.kod:focus { outline: 2px solid #1f4b5c; outline-offset: -2px; }
.editor-aksi { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-top: 1px solid var(--garis); }
.btn-utama { background: var(--teal); color: #04120f; border: 0; border-radius: 9px; padding: 8px 18px; font-weight: 700; font-size: 14px; cursor: pointer; }
.btn-utama:hover { background: #35c9be; }
.btn-utama[disabled] { opacity: 0.55; cursor: progress; }
.editor-status { font-size: 13px; color: var(--teks-2); }
.hasil { border-top: 1px solid var(--garis); background: #060c16; }
.hasil-baris { display: flex; justify-content: space-between; padding: 8px 12px; font-size: 12.5px; color: var(--teks-2); border-bottom: 1px solid #14202f; }
.hasil-teks { margin: 0; padding: 14px 16px; color: #c8f0dc; font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 13px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; color: #d7e6f5; max-height: 420px; overflow: auto; }
.hasil-teks.ralat { color: var(--ralat); }

.nota-bab { margin: 0; padding: 12px 14px; background: var(--teal-lembut); border-top: 1px solid var(--garis); color: #bfe6e2; font-size: 14px; }
.nota-kaki { margin: 14px 0 0; padding: 12px 14px; border-left: 3px solid var(--amber); background: #1a1708; color: #e6d9b8; font-size: 14px; border-radius: 0 10px 10px 0; }
.nota-kaki.kecil { font-size: 13px; background: transparent; border-left-color: var(--garis); color: var(--teks-2); padding: 6px 0 0; }

.kaki { border-top: 1px solid var(--garis); padding: 22px 20px 40px; text-align: center; color: var(--teks-2); font-size: 13.5px; }
.kaki-kecil { margin: 6px auto 0; max-width: 62ch; color: #8496ad; font-size: 13.5px; }

@media (max-width: 900px) {
	.shell { grid-template-columns: 1fr; gap: 20px; padding-top: 18px; }
	.sisi { position: static; order: 2; }
	.sisi-senarai { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
	.hero { grid-template-columns: 1fr; gap: 18px; }
	.hero-imej { order: -1; border-radius: 16px; }
	.topnav { display: none; }
}

.hero-aksi { display: flex; gap: 12px; align-items: center; margin: 18px 0 0; flex-wrap: wrap; }
.btn-hero { display: inline-flex; align-items: center; gap: 8px; background: var(--teal); color: #04120f; font-weight: 700; border-radius: 10px; padding: 10px 18px; font-size: 15px; }
.btn-hero:hover { background: #35c9be; text-decoration: none; }
.hero-petunjuk { color: var(--teks-2); font-size: 13.5px; }

.cuba-shell { grid-template-columns: minmax(0, 1fr); max-width: 880px; }

/* ---------- Silibus: modul, pelajaran, kemajuan ---------- */
.modul-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin-top: 8px; }
.modul-kad { display: grid; gap: 4px; padding: 16px 18px; background: var(--panel); border: 1px solid var(--garis); border-radius: 14px; color: var(--teks); }
a.modul-kad:hover { border-color: #2a4a63; text-decoration: none; transform: translateY(-1px); }
.modul-kad.belum { opacity: .62; }
.modul-no { font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--amber); }
.modul-tajuk { font-weight: 650; letter-spacing: -.01em; }
.modul-meta { font-size: 13px; color: var(--teks-2); }
.pelajaran-senarai { margin: 18px 0 0; padding-left: 0; list-style: none; display: grid; gap: 6px; }
.pelajaran-senarai li { padding: 8px 10px; border: 1px solid var(--garis); border-radius: 9px; background: var(--panel); }
.pelajaran-senarai li.belum { opacity: .6; }
.pelajaran-senarai a { color: var(--teks); display: inline-flex; gap: 10px; }
.kecil-tajuk { margin: 26px 0 8px; font-size: 17px; letter-spacing: -.01em; }
.langkah { margin: 0 0 8px; padding-left: 22px; color: #cdd8e6; }
.langkah li { margin-bottom: 6px; }
.output-dijangka { margin: 0; padding: 12px 14px; background: #060c16; border: 1px solid var(--garis); border-radius: 10px;
  font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 13px; color: #c8f0dc; white-space: pre-wrap; }
.kod-script { margin: 18px 0 0; }
.kod-script summary { cursor: pointer; color: var(--teks-2); font-size: 14px; margin-bottom: 8px; }
.tanda-siap { display: inline-flex; gap: 8px; align-items: center; margin: 22px 0 0; font-size: 14px; color: var(--teks-2); }
.tanda-siap input { width: 16px; height: 16px; accent-color: #2bb3a9; }

/* Halaman silibus: satu lajur, lebih lebar daripada halaman pelajaran */
.home-shell { max-width: 1080px; }
.hero-solo { grid-template-columns: minmax(0, 1fr); }

/* Pelajaran: pengenalan, jadual perbandingan, semakan */
.pengenalan { margin: 0 0 16px; padding: 12px 14px; border-left: 3px solid #2bb3a9; background: #0d1c26; color: #cfe3ee; border-radius: 0 10px 10px 0; font-size: 15px; }
.jadual-bungkus { overflow-x: auto; margin: 6px 0 4px; }
.jadual-banding { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.jadual-banding th, .jadual-banding td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--garis); vertical-align: top; }
.jadual-banding th { color: var(--teks-2); font-weight: 600; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }
.jadual-banding code { background: #16233a; padding: 1px 5px; border-radius: 5px; }
.kod-asing { border-style: dashed; color: #d9c9a3; }
.semak-kefahaman { margin: 18px 0 0; padding: 10px 12px; border: 1px dashed var(--garis); border-radius: 10px; color: var(--teks-2); font-size: 14px; }
.versi-kecil { margin: 14px 0 0; font-size: 12px; color: #6d7f96; }

/* Navigasi sebelum/seterusnya */
.jiran { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 28px 0 6px; }
.jiran-pautan { display: grid; gap: 2px; padding: 12px 14px; border: 1px solid var(--garis); border-radius: 12px; background: var(--panel); color: var(--teks); }
.jiran-pautan:hover { border-color: #2a4a63; text-decoration: none; }
.jiran-kanan { text-align: right; }
.jiran-label { font-size: 12px; color: var(--teks-2); }
.jiran-tajuk { font-weight: 600; font-size: 14.5px; }
@media (max-width: 640px) { .jiran { grid-template-columns: 1fr; } }