:root {
  --bg:       #faf7f2;
  --bg2:      #ffffff;
  --bg3:      #f3ede3;
  --accent:   #b5691e;
  --accent2:  #d4874a;
  --deep:     #5c2d0e;
  --teal:     #2e7d7a;
  --text:     #2c1a0e;
  --text2:    #7a5c42;
  --border:   #e4d5c0;
  --complete: #2e7d7a;
  --progress: #b5691e;
  --radius:   10px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: 'Segoe UI', system-ui, sans-serif; line-height: 1.6; min-height: 100vh; }

/* NAV */
nav { background: var(--deep); border-bottom: 2px solid #8b3a0a; padding: 0 2rem; display: flex; align-items: center; gap: 2rem; height: 62px; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 12px rgba(92,45,14,.25); }
nav .brand { font-size: 1.15rem; font-weight: 700; color: #f5d49a; text-decoration: none; letter-spacing: .06em; }
nav .brand span { color: #d4a56a; font-weight: 400; }
.nav-search { flex: 1; max-width: 400px; display: flex; position: relative; }
.nav-search input { width: 100%; padding: .4rem .9rem; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); border-radius: 20px; color: #fdf6ec; font-size: .9rem; outline: none; }
.nav-search input::placeholder { color: rgba(255,255,255,.45); }
.nav-search input:focus { border-color: #f5d49a; background: rgba(255,255,255,.18); }
.nav-links a { color: #d4a56a; text-decoration: none; font-size: .9rem; }
.nav-links a:hover { color: #f5d49a; }
.search-form { position: relative; }
.search-suggest {
  position: absolute;
  top: calc(100% + .45rem);
  left: 0;
  right: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 28px rgba(92,45,14,.14);
  overflow: hidden;
  z-index: 150;
}
.nav-search .search-suggest {
  background: #fffaf3;
}
.search-suggest[hidden] { display: none; }
.search-suggest-item,
.search-suggest-more {
  display: block;
  width: 100%;
  padding: .75rem .95rem;
  text-decoration: none;
  color: var(--text);
  border-top: 1px solid var(--border);
}
.search-suggest-item:first-child,
.search-suggest-more:first-child {
  border-top: none;
}
.search-suggest-item:hover,
.search-suggest-more:hover {
  background: var(--bg3);
}
.search-suggest-title {
  display: block;
  font-size: .92rem;
  font-weight: 600;
  color: var(--deep);
}
.search-suggest-slug {
  display: block;
  font-size: .78rem;
  color: var(--text2);
}
.search-suggest-more {
  font-size: .82rem;
  color: var(--accent);
  font-weight: 600;
}

/* MAIN */
main { max-width: 1280px; margin: 0 auto; padding: 2rem; }

/* PAGE HEADER */
.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 1.8rem; color: var(--deep); font-weight: 700; }
.page-header p { color: var(--text2); margin-top: .3rem; }

/* FILTER BAR */
.filter-bar { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 2rem; align-items: center; }
.filter-bar .pill { padding: .35rem .9rem; border-radius: 20px; border: 1px solid var(--border); background: var(--bg2); color: var(--text2); text-decoration: none; font-size: .85rem; cursor: pointer; transition: all .15s; }
.filter-bar .pill:hover, .filter-bar .pill.active { border-color: var(--accent); color: var(--accent); background: #fff4eb; }
.filter-bar .sep { color: var(--border); }
select.sort-select { padding: .35rem .8rem; background: var(--bg2); border: 1px solid var(--border); color: var(--text2); border-radius: 20px; font-size: .85rem; cursor: pointer; }
select.sort-select:focus { border-color: var(--accent); outline: none; }

/* COURSE GRID */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.5rem; }
.course-card { background: var(--bg2); border-radius: var(--radius); overflow: hidden; text-decoration: none; color: var(--text); border: 1px solid var(--border); transition: transform .2s, box-shadow .2s; display: flex; flex-direction: column; }
.course-card:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(92,45,14,.14); border-color: var(--accent2); }
.course-card .thumb { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: var(--bg3); display: block; }
.course-card .card-body { padding: 1rem; flex: 1; display: flex; flex-direction: column; gap: .5rem; }
.course-card h3 { font-size: .95rem; font-weight: 600; line-height: 1.4; color: var(--deep); }
.course-card .meta { color: var(--text2); font-size: .8rem; }
.progress-bar-wrap { background: var(--bg3); border-radius: 4px; height: 4px; overflow: hidden; }
.progress-bar { height: 100%; border-radius: 4px; background: linear-gradient(90deg,var(--accent),var(--accent2)); transition: width .3s; }
.status-badge { font-size: .75rem; padding: .2rem .6rem; border-radius: 10px; font-weight: 600; display: inline-block; }
.status-complete   { background: rgba(46,125,122,.12); color: var(--teal); }
.status-in_progress{ background: rgba(181,105,30,.12); color: var(--accent); }
.status-not_started{ background: var(--bg3); color: var(--text2); }

/* COURSE PAGE */
.course-hero { display: flex; gap: 2rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.course-hero img { width: 300px; border-radius: var(--radius); object-fit: cover; flex-shrink: 0; box-shadow: 0 4px 16px rgba(92,45,14,.15); }
.course-hero-info { flex: 1; min-width: 220px; display: flex; flex-direction: column; gap: .8rem; }
.course-hero-info h1 { font-size: 1.6rem; color: var(--deep); }
.big-progress { display: flex; align-items: center; gap: 1rem; }
.big-progress .pct { font-size: 1.4rem; font-weight: 700; color: var(--accent); min-width: 3.5rem; }
.big-progress .bar-wrap { flex: 1; background: var(--bg3); border-radius: 6px; height: 8px; overflow: hidden; }
.big-progress .bar-fill { height: 100%; border-radius: 6px; background: linear-gradient(90deg,var(--accent),var(--accent2)); }
.last-activity { color: var(--text2); font-size: .85rem; }

/* COURSE META ROW */
.course-meta-row { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-top: .3rem; }
.course-meta-row .meta-item { font-size: .85rem; color: var(--text2); }
.course-meta-row .meta-item strong { color: var(--deep); }

/* COURSE DESCRIPTION BLOCK */
.course-description-block { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem 1.5rem; margin-bottom: 2rem; }
.course-description { line-height: 1.75; color: var(--text); font-size: .92rem; }
.course-description p { margin-bottom: .6rem; }
.course-description a { color: var(--accent); }
.course-description img { max-width: 100%; border-radius: 6px; margin: .5rem 0; }

/* COURSE DETAILS COLLAPSIBLE */
.course-details-toggle { border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg2); margin-bottom: 1rem; }
.course-details-toggle summary { cursor: pointer; color: var(--deep); font-size: 1.1rem; font-weight: 700; list-style: none; display: flex; align-items: center; gap: .5rem; padding: 1rem 1.2rem; border-bottom: 1px solid transparent; user-select: none; }
.course-details-toggle[open] summary { border-bottom-color: var(--border); }
.course-details-toggle summary::-webkit-details-marker { display: none; }
.course-details-toggle summary svg { transition: transform .25s; flex-shrink: 0; }
.course-details-toggle[open] summary svg { transform: rotate(180deg); }
.lesson-count-badge { margin-left: auto; font-size: .8rem; font-weight: 500; color: var(--text2); background: var(--bg3); padding: .15rem .7rem; border-radius: 12px; }
.course-details-toggle .section-group { padding: 0 1.2rem; }
.course-details-toggle .section-group:last-child { padding-bottom: .5rem; }

/* LESSON LIST */
.section-group { margin-bottom: 1.5rem; }
.section-label { font-size: .75rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--text2); padding: .5rem 0; border-bottom: 1px solid var(--border); margin-bottom: .5rem; }
.lesson-row { display: flex; align-items: center; gap: .75rem; padding: .6rem .75rem; border-radius: 8px; text-decoration: none; color: var(--text); transition: background .15s; }
.lesson-row:hover { background: var(--bg3); }
.lesson-row.complete .check { color: var(--teal); }
.check { width: 18px; height: 18px; flex-shrink: 0; color: var(--border); }
.lesson-row .l-title { flex: 1; font-size: .9rem; }
.lesson-row .l-meta { font-size: .78rem; color: var(--text2); }

/* LESSON PAGE */
.lesson-layout { display: grid; grid-template-columns: 1fr 280px; gap: 2rem; align-items: start; }
@media(max-width:900px){ .lesson-layout { grid-template-columns: 1fr; } }
.lesson-main { min-width: 0; }
.lesson-sidebar { position: sticky; top: 72px; background: var(--bg2); border-radius: var(--radius); padding: 1rem; border: 1px solid var(--border); max-height: calc(100vh - 90px); overflow-y: auto; box-shadow: 0 2px 10px rgba(92,45,14,.07); }
.lesson-sidebar h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text2); margin-bottom: .75rem; }

/* VIDEO */
.video-wrap { position: relative; padding-top: 56.25%; background: #1a0a00; border-radius: var(--radius); overflow: hidden; margin-bottom: 1.5rem; box-shadow: 0 4px 16px rgba(0,0,0,.15); }
.video-wrap iframe, .video-wrap video { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }

/* AUDIO */
.audio-section { margin-bottom: 1.5rem; }
.audio-section h3 { font-size: .9rem; color: var(--text2); margin-bottom: .75rem; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
audio { width: 100%; border-radius: 6px; accent-color: var(--accent); }
audio + audio { margin-top: .5rem; }

/* LESSON CONTENT */
.lesson-content { line-height: 1.85; color: var(--text); }
.lesson-content h1,.lesson-content h2,.lesson-content h3 { color: var(--deep); margin: 1.2rem 0 .5rem; }
.lesson-content p { margin-bottom: .8rem; }
.lesson-content a { color: var(--accent); }

/* FILES */
.file-list { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1.5rem; }
.file-link { display: flex; align-items: center; gap: .6rem; padding: .5rem .8rem; background: var(--bg3); border-radius: 8px; text-decoration: none; color: var(--text); font-size: .88rem; border: 1px solid var(--border); transition: border-color .15s; }
.file-link:hover { border-color: var(--accent); background: #fff4eb; }
.file-icon { font-size: 1.1rem; }

/* NAV FOOTER */
.lesson-nav { display: flex; justify-content: space-between; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.lesson-nav a { display: flex; align-items: center; gap: .5rem; padding: .6rem 1.2rem; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; text-decoration: none; color: var(--text); font-size: .9rem; transition: border-color .15s; }
.lesson-nav a:hover { border-color: var(--accent); background: #fff4eb; }
.lesson-nav .spacer { flex: 1; }

/* SEARCH */
.search-results { display: flex; flex-direction: column; gap: .75rem; margin-top: 1.5rem; }
.result-item { padding: .9rem 1.1rem; background: var(--bg2); border-radius: 8px; border: 1px solid var(--border); text-decoration: none; color: var(--text); display: flex; flex-direction: column; gap: .25rem; transition: border-color .15s, box-shadow .15s; }
.result-item:hover { border-color: var(--accent2); box-shadow: 0 4px 14px rgba(92,45,14,.1); }
.result-item .r-type { font-size: .75rem; text-transform: uppercase; color: var(--text2); letter-spacing: .08em; }
.result-item .r-title { font-size: .95rem; font-weight: 600; color: var(--deep); }
.result-item .r-sub { font-size: .82rem; color: var(--text2); }

/* BREADCRUMB */
.breadcrumb { font-size: .82rem; color: var(--text2); margin-bottom: 1.2rem; display: flex; gap: .4rem; align-items: center; flex-wrap: wrap; }
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* LOGIN PAGE */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(145deg, #faf0e0 0%, #f3e6ce 50%, #e8d5b5 100%); }
.login-box { background: white; border-radius: 16px; padding: 2.5rem 2rem; width: 100%; max-width: 380px; box-shadow: 0 8px 40px rgba(92,45,14,.18); border: 1px solid var(--border); }
.login-box .logo { text-align: center; margin-bottom: 1.8rem; }
.login-box .logo h1 { font-size: 1.5rem; color: var(--deep); font-weight: 700; }
.login-box .logo p { font-size: .85rem; color: var(--text2); margin-top: .2rem; }
.login-box label { display: block; font-size: .85rem; font-weight: 600; color: var(--text2); margin-bottom: .35rem; }
.login-box input[type=text], .login-box input[type=password] { width: 100%; padding: .6rem .9rem; border: 1px solid var(--border); border-radius: 8px; font-size: .95rem; color: var(--text); background: var(--bg); outline: none; margin-bottom: 1rem; }
.login-box input:focus { border-color: var(--accent); }
.login-box .btn-login { width: 100%; padding: .7rem; background: linear-gradient(135deg,var(--accent),var(--accent2)); color: white; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; letter-spacing: .03em; transition: opacity .15s; }
.login-box .btn-login:hover { opacity: .9; }
.login-box .error { background: #fff0f0; border: 1px solid #f5c0c0; color: #c0392b; border-radius: 6px; padding: .5rem .8rem; font-size: .85rem; margin-bottom: 1rem; }