@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Mono:wght@400;500&family=DM+Sans:wght@300;400;500;600&display=swap');

:root {
  --bg:      #f8f6f1;
  --surface: #ffffff;
  --border:  #e0dbd0;
  --text:    #1a1814;
  --muted:   #7a7060;
  --accent:  #1d3f6e;
  --accent2: #c8430a;
  --success: #1a6640;
  --danger:  #9b1c1c;
  --radius:  6px;
  --shadow:  0 2px 12px rgba(0,0,0,.08);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'DM Sans', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; font-size: 15px; line-height: 1.6; }
.navbar { background: var(--accent); display: flex; align-items: center; justify-content: space-between; padding: 0 2rem; height: 58px; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 8px rgba(0,0,0,.2); }
.brand { font-family: 'DM Serif Display', serif; font-size: 1.5rem; color: #fff; text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: .25rem; }
.nav-links a { color: rgba(255,255,255,.82); text-decoration: none; padding: .35rem .75rem; border-radius: var(--radius); font-size: .875rem; font-weight: 500; transition: background .15s; }
.nav-links a:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-nav-primary { background: var(--accent2) !important; color: #fff !important; }
.btn-nav-logout { color: rgba(255,255,255,.6) !important; }
.container { max-width: 1000px; margin: 2rem auto; padding: 0 1.5rem; flex: 1; padding-bottom: 3rem; }
h1, h2, h3 { font-family: 'DM Serif Display', serif; font-weight: normal; }
h1 { font-size: 2rem; margin-bottom: .5rem; }
h2 { font-size: 1.4rem; margin-bottom: 1rem; }
.page-header { border-bottom: 2px solid var(--accent); padding-bottom: .75rem; margin-bottom: 1.75rem; }
.page-header p { color: var(--muted); font-size: .9rem; margin-top: .25rem; }
.alert { padding: .75rem 1rem; border-radius: var(--radius); font-size: .875rem; margin-bottom: 1.25rem; border-left: 4px solid; }
.alert-error { background: #fef2f2; color: var(--danger); border-color: var(--danger); }
.alert-ok { background: #f0fdf4; color: var(--success); border-color: var(--success); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.5rem; margin-bottom: 1.25rem; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.course-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; transition: box-shadow .2s, border-color .2s; display: flex; flex-direction: column; gap: .5rem; }
.course-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,.12); border-color: var(--accent); }
.course-code { font-family: 'DM Mono', monospace; font-size: .78rem; color: var(--accent2); font-weight: 500; letter-spacing: .5px; text-transform: uppercase; }
.course-title { font-family: 'DM Serif Display', serif; font-size: 1.05rem; }
.course-meta { font-size: .82rem; color: var(--muted); display: flex; gap: 1rem; flex-wrap: wrap; }
.badge { display: inline-block; font-size: .7rem; font-weight: 600; padding: .2rem .6rem; border-radius: 20px; text-transform: uppercase; letter-spacing: .4px; }
.badge-full { background: #fee2e2; color: var(--danger); }
.badge-open { background: #dcfce7; color: var(--success); }
.badge-student { background: #dbeafe; color: #1e40af; }
.badge-admin { background: #fef9c3; color: #854d0e; }
.capacity-bar { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; margin-top: .25rem; }
.capacity-bar-fill { height: 100%; background: var(--accent); border-radius: 2px; }
.capacity-bar-fill.full { background: var(--accent2); }
.form-group { margin-bottom: 1rem; }
label { display: block; font-size: .83rem; font-weight: 600; margin-bottom: .35rem; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea { width: 100%; padding: .6rem .85rem; border: 1px solid var(--border); border-radius: var(--radius); font-family: 'DM Sans', sans-serif; font-size: .9rem; background: var(--surface); color: var(--text); transition: border-color .15s; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(29,63,110,.1); }
textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; padding: .55rem 1.2rem; border-radius: var(--radius); font-family: 'DM Sans', sans-serif; font-size: .875rem; font-weight: 600; cursor: pointer; border: none; text-decoration: none; transition: opacity .15s, transform .1s; }
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-sm { padding: .35rem .85rem; font-size: .8rem; }
.btn:hover { opacity: .88; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
thead th { text-align: left; padding: .6rem 1rem; background: var(--bg); border-bottom: 2px solid var(--border); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
tbody tr { border-bottom: 1px solid var(--border); transition: background .1s; }
tbody tr:hover { background: #faf9f6; }
tbody td { padding: .7rem 1rem; vertical-align: middle; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; text-align: center; }
.stat-num { font-family: 'DM Serif Display', serif; font-size: 2.2rem; color: var(--accent); line-height: 1; }
.stat-lbl { font-size: .78rem; color: var(--muted); margin-top: .3rem; text-transform: uppercase; letter-spacing: .5px; }
.auth-wrap { min-height: calc(100vh - 58px); display: flex; align-items: center; justify-content: center; padding: 2rem 1rem; }
.auth-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 2.5rem 2rem; width: 100%; max-width: 400px; box-shadow: var(--shadow); }
.auth-card h1 { font-size: 1.7rem; margin-bottom: .25rem; }
.auth-card .sub { color: var(--muted); font-size: .875rem; margin-bottom: 1.75rem; }
.auth-footer { text-align: center; margin-top: 1.25rem; font-size: .85rem; color: var(--muted); }
.auth-footer a { color: var(--accent); text-decoration: none; font-weight: 600; }
.footer { text-align: center; padding: 1.25rem; font-size: .8rem; color: var(--muted); border-top: 1px solid var(--border); margin-top: auto; }
.flex-between { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.25rem; }
.empty { text-align: center; padding: 3rem 1rem; color: var(--muted); font-style: italic; }
.mono { font-family: 'DM Mono', monospace; }