/* DIYC Learning */
:root{
  --navy:#0f2a43; --navy-2:#16385a; --blue:#1f6fb2; --blue-light:#e8f1f9;
  --ink:#1c2733; --muted:#5b6b7b; --line:#dfe6ee; --bg:#f5f8fb; --card:#ffffff;
  --ok:#1e7e4c; --ok-bg:#e7f5ec; --bad:#b23a3a; --bad-bg:#faecec; --gold:#c8a24a;
  --radius:10px; --shadow:0 1px 3px rgba(15,42,67,.08),0 4px 14px rgba(15,42,67,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);min-height:100vh;display:flex;flex-direction:column}
img{max-width:100%;height:auto}
a{color:var(--blue);text-decoration:none}
.container{width:100%;max-width:1080px;margin:0 auto;padding:0 20px}
main{flex:1;padding:32px 0 56px}
main.full{padding:0}

/* Topbar */
.topbar{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 1px 4px rgba(0,0,0,.2)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-size:1.25rem;font-weight:800;color:#fff;letter-spacing:.5px}
.brand span{color:#7db6e8;font-weight:400}
.topbar nav{display:flex;align-items:center;gap:18px}
.topbar nav a{color:#dce8f4;font-size:.95rem}
.topbar nav a:hover{color:#fff}
.nav-user{color:#9fb8d0;font-size:.9rem}

/* Buttons */
.btn{display:inline-block;border:none;cursor:pointer;font:600 1rem inherit;border-radius:8px;padding:11px 22px;transition:.15s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#185c95;color:#fff}
.btn-outline{background:transparent;border:1px solid #7ea8cc;color:#dce8f4}
.btn-outline:hover{border-color:#fff;color:#fff}
.btn-sm{padding:7px 16px;font-size:.9rem}
.btn-big{padding:14px 34px;font-size:1.05rem}
.btn-ghost{background:#eef3f8;color:var(--navy)}
.btn-ghost:hover{background:#e2ebf3}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* Hero (homepage) */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#1c4a74 100%);color:#fff;padding:84px 0}
.hero h1{font-size:2.6rem;line-height:1.2;max-width:640px}
.hero p{margin:18px 0 30px;font-size:1.15rem;color:#c6d8ea;max-width:560px}
.section{padding:56px 0}
.section h2{font-size:1.7rem;margin-bottom:24px;color:var(--navy)}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.card-body{padding:20px}
.card h3{color:var(--navy);margin-bottom:8px}
.card p{color:var(--muted);font-size:.95rem}
.card .cover{height:150px;background:linear-gradient(120deg,#16385a,#1f6fb2);display:flex;align-items:center;justify-content:center;color:#bcd6ec;font-weight:700;font-size:1.1rem;padding:0 20px;text-align:center}

/* Forms */
.form-card{max-width:420px;margin:40px auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}
.form-card h1{font-size:1.5rem;margin-bottom:18px;color:var(--navy)}
label{display:block;font-weight:600;font-size:.9rem;margin:14px 0 5px;color:var(--navy)}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],textarea,select{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff}
textarea{min-height:120px;resize:vertical}
input:focus,textarea:focus,select:focus{outline:2px solid rgba(31,111,178,.35);border-color:var(--blue)}
.form-actions{margin-top:22px}

.flash{padding:12px 16px;border-radius:8px;margin-bottom:18px;font-size:.95rem}
.flash-ok{background:var(--ok-bg);color:var(--ok)}
.flash-err{background:var(--bad-bg);color:var(--bad)}

/* Dashboard */
.progressbar{height:8px;background:#e4ebf2;border-radius:99px;overflow:hidden;margin:10px 0 4px}
.progressbar i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#3f95d8);border-radius:99px}
.progress-label{font-size:.85rem;color:var(--muted)}
.badge{display:inline-block;font-size:.75rem;font-weight:700;padding:3px 10px;border-radius:99px;white-space:nowrap}

/* Toggle switch (admin) */
.switch{position:relative;display:inline-block;width:46px;height:26px;vertical-align:middle;cursor:pointer}
.switch input{opacity:0;width:0;height:0}
.switch .slider{position:absolute;inset:0;background:#cfd9e3;border-radius:99px;transition:.2s}
.switch .slider::before{content:"";position:absolute;height:20px;width:20px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.switch input:checked + .slider{background:var(--ok)}
.switch input:checked + .slider::before{transform:translateX(20px)}
.switch:hover .slider{filter:brightness(.95)}
.link-danger{background:none;border:none;padding:0;font:inherit;font-size:.9rem;color:var(--bad);cursor:pointer}
.link-danger:hover{text-decoration:underline}
.badge-done{background:var(--ok-bg);color:var(--ok)}
.badge-progress{background:var(--blue-light);color:var(--blue)}

/* Course intro */
.course-hero{background:linear-gradient(135deg,var(--navy),#1c4a74);color:#fff;padding:56px 0;margin:-32px 0 36px}
.course-hero h1{font-size:2.1rem;max-width:760px}
.course-hero p{color:#c6d8ea;margin-top:10px;max-width:640px}
.intro-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 32px;margin-bottom:22px}
.intro-block h2{color:var(--navy);font-size:1.25rem;margin-bottom:12px;padding-bottom:10px;border-bottom:2px solid var(--blue-light)}
.intro-block ul,.intro-block ol{padding-left:22px;margin:10px 0}
.intro-block li{margin:6px 0}

/* Learn layout */
.learn-wrap{display:grid;grid-template-columns:320px 1fr;min-height:calc(100vh - 60px)}
.sidebar{background:#fff;border-right:1px solid var(--line);padding:22px 0;overflow-y:auto;max-height:calc(100vh - 60px);position:sticky;top:60px}
.sidebar h2{font-size:.95rem;padding:0 20px 12px;color:var(--navy)}
.sidebar .course-progress{padding:0 20px 14px;border-bottom:1px solid var(--line);margin-bottom:8px}
.mod-title{font-weight:700;font-size:.85rem;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);padding:14px 20px 6px}

/* Collapsible module groups in the course outline */
.mod-group summary{display:flex;align-items:center;gap:10px;padding:12px 20px 8px;cursor:pointer;list-style:none;user-select:none}
.mod-group summary::-webkit-details-marker{display:none}
.mod-group summary:hover{background:var(--blue-light)}
.mod-name{flex:1;font-weight:700;font-size:.85rem;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.mod-group[open] .mod-name{color:var(--navy)}
.mod-state{flex:0 0 auto;min-width:30px;text-align:center;font-size:.72rem;font-weight:700;border-radius:99px;padding:3px 7px;background:#e8eef4;color:var(--muted)}
.mod-state.done{background:var(--ok-bg);color:var(--ok)}
.mod-state.progress{background:var(--blue-light);color:var(--blue)}
.mod-chev{color:var(--muted);font-size:.8rem;transition:transform .15s}
.mod-group[open] .mod-chev{transform:rotate(180deg)}

/* Mobile outline toggle (hidden on desktop) */
.outline-toggle{display:none}
.comp-link{display:flex;align-items:center;gap:10px;padding:9px 20px;font-size:.92rem;color:var(--ink);border-left:3px solid transparent}
.comp-link:hover{background:var(--blue-light)}
.comp-link.active{background:var(--blue-light);border-left-color:var(--blue);font-weight:600;color:var(--navy)}
.comp-link.locked{color:#a7b4c1;pointer-events:none}
.comp-ic{width:22px;height:22px;flex:0 0 22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.7rem;background:#e8eef4;color:var(--muted)}
.comp-link.done .comp-ic{background:var(--ok);color:#fff}
.comp-link.active .comp-ic{background:var(--blue);color:#fff}
.content-pane{padding:36px 48px;max-width:940px;width:100%;margin:0 auto}
.content-pane h1{color:var(--navy);font-size:1.6rem;margin-bottom:4px}
.crumb{color:var(--muted);font-size:.9rem;margin-bottom:22px}
.type-tag{display:inline-block;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;padding:3px 10px;border-radius:99px;background:var(--blue-light);color:var(--blue);margin-bottom:10px}
.video-frame{position:relative;padding-top:56.25%;background:#000;border-radius:var(--radius);overflow:hidden;margin:18px 0}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.body-html{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 32px;margin:18px 0;box-shadow:var(--shadow)}
.body-html h3,.body-html h4{color:var(--navy);margin:18px 0 8px}
.body-html p{margin:10px 0}
.body-html ul,.body-html ol{padding-left:24px;margin:10px 0}
.body-html li{margin:7px 0}
.body-html img{border-radius:8px;margin:14px 0;border:1px solid var(--line)}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:28px}

/* Quiz */
.quiz-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 32px;margin:18px 0}
.quiz-progress{font-size:.85rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;margin-bottom:10px}
.quiz-q{font-size:1.1rem;font-weight:600;color:var(--navy);margin-bottom:18px}
.choice{display:block;width:100%;text-align:left;background:#f8fafc;border:2px solid var(--line);border-radius:10px;padding:14px 16px;margin:10px 0;font:inherit;cursor:pointer;transition:.15s}
.choice:hover{border-color:var(--blue);background:var(--blue-light)}
.choice.picked-wrong{border-color:var(--bad);background:var(--bad-bg)}
.choice.picked-right{border-color:var(--ok);background:var(--ok-bg)}
.choice[disabled]{cursor:default;opacity:.75}
.explain{border-radius:10px;padding:16px 18px;margin:14px 0;font-size:.97rem;display:none}
.explain.show{display:block}
.explain.wrong{background:var(--bad-bg);border-left:4px solid var(--bad)}
.explain.right{background:var(--ok-bg);border-left:4px solid var(--ok)}
.explain .lead{font-weight:700;margin-bottom:4px}
.quiz-done{background:var(--ok-bg);border-left:4px solid var(--ok);border-radius:10px;padding:18px 20px;margin:16px 0}
.quiz-box.answered{border-left:4px solid var(--ok)}
.quiz-box.answered .choice{opacity:.85}
.quiz-box.answered .choice.picked-right{opacity:1}

/* Completion / certificate */
.score-hero{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:44px;text-align:center;margin:24px 0}
.score-num{font-size:3.4rem;font-weight:800;color:var(--navy)}
.score-hero p{color:var(--muted)}

/* Admin */
.admin-grid{display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:start}
.admin-nav{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px 0}
.admin-nav a{display:block;padding:9px 18px;color:var(--ink);font-size:.95rem}
.admin-nav a:hover,.admin-nav a.active{background:var(--blue-light);color:var(--blue)}
table.data{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:.95rem}
table.data th{background:#f0f4f9;text-align:left;padding:10px 14px;color:var(--navy);font-size:.85rem;text-transform:uppercase;letter-spacing:.3px}
table.data td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:top}
table.data tr:hover td{background:#f8fafc}
.actions a{margin-right:10px;font-size:.9rem}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 30px;margin-bottom:22px}
.panel h2{color:var(--navy);font-size:1.2rem;margin-bottom:14px}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.mt{margin-top:18px}
.footer{background:var(--navy);color:#93a9bf;padding:20px 0;font-size:.85rem;margin-top:auto}

@media(max-width:1180px){
  .learn-wrap{grid-template-columns:1fr}
  .sidebar{position:static;max-height:none;border-right:none;border-bottom:1px solid var(--line)}
  .content-pane{padding:24px 20px}
  .admin-grid{grid-template-columns:1fr}
  .hero h1{font-size:2rem}

  /* On phones the whole outline collapses behind the progress bar; tap it to open */
  .outline-toggle{display:flex;align-items:center;gap:12px;width:100%;
    background:#fff;border:none;border-bottom:1px solid var(--line);padding:12px 20px;
    font:600 .9rem inherit;color:var(--navy);cursor:pointer;position:sticky;top:60px;z-index:40}
  .ot-bar{flex:1;height:8px;background:#e4ebf2;border-radius:99px;overflow:hidden}
  .ot-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#3f95d8);border-radius:99px}
  .outline-toggle .outline-meta{color:var(--blue);font-weight:700;white-space:nowrap}
  .outline-toggle.open .outline-meta{color:var(--muted)}
  .sidebar{display:none}
  .sidebar.open{display:block}
  .sidebar .course-progress{display:none} /* the top bar already shows progress on mobile */
}