:root {
  --green: #1f7a4d;
  --green-dark: #145c39;
  --orange: #e8791a;
  --orange-dark: #c9660f;
  --bg: #f6f7f5;
  --card: #ffffff;
  --border: #e3e6e1;
  --text: #1c231f;
  --muted: #6b7570;
  --danger: #c0392b;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  background: linear-gradient(90deg, var(--green-dark), var(--green));
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar .brand { font-size: 18px; font-weight: 700; letter-spacing: 0.2px; }
.topbar .brand span { color: #ffd9a8; }
.topbar a.logout {
  color: #fff; text-decoration: none; background: rgba(255,255,255,0.15);
  padding: 8px 14px; border-radius: 6px; font-size: 14px;
}
.topbar a.logout:hover { background: rgba(255,255,255,0.28); }

.wrap { max-width: 960px; margin: 0 auto; padding: 28px 20px 60px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 0 0 14px; }
p.sub { color: var(--muted); margin: 0 0 20px; font-size: 14px; }

.breadcrumb { font-size: 14px; margin-bottom: 16px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.breadcrumb a { color: var(--green-dark); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--muted); }

form.inline { display: flex; gap: 10px; flex-wrap: wrap; }

input[type=text], input[type=password], input[type=file] {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  width: 100%;
}
input[type=text]:focus, input[type=password]:focus { outline: 2px solid var(--green); outline-offset: 1px; }

button, .btn {
  background: var(--green); color: #fff; border: none; border-radius: 6px;
  padding: 10px 16px; font-size: 14px; cursor: pointer; text-decoration: none; display: inline-block;
}
button:hover, .btn:hover { background: var(--green-dark); }
.btn.orange { background: var(--orange); }
.btn.orange:hover { background: var(--orange-dark); }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #96291d; }
.btn.ghost { background: transparent; color: var(--green-dark); border: 1px solid var(--border); }
.btn.ghost:hover { background: #eef3ee; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }

/* Home page section cards */
.section-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.section-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  background: #fbfcfa;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow .15s, transform .15s;
}
.section-card:hover { box-shadow: 0 6px 18px rgba(0,0,0,0.08); transform: translateY(-2px); }
.section-card .section-icon { font-size: 34px; margin-bottom: 10px; }
.section-card .section-title { font-size: 18px; font-weight: 700; }
.section-card .section-meta { color: var(--muted); font-size: 13px; margin-top: 6px; }
.section-card.pdf { border-top: 4px solid var(--green); }
.section-card.video { border-top: 4px solid var(--orange); }

.folder-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: #fbfcfa;
  transition: box-shadow .15s, transform .15s;
}
.folder-card:hover { box-shadow: 0 4px 14px rgba(0,0,0,0.06); transform: translateY(-1px); }
.folder-card a.folder-link { font-weight: 600; color: var(--text); text-decoration: none; font-size: 15.5px; }
.folder-card a.folder-link:hover { color: var(--green-dark); }
.folder-card .meta { color: var(--muted); font-size: 12.5px; margin-top: 6px; }
.folder-card .actions { margin-top: 12px; display: flex; gap: 8px; }

.file-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.file-row:last-child { border-bottom: none; }
.file-info { min-width: 0; }
.file-info .fname { font-weight: 600; font-size: 14.5px; word-break: break-all; }
.file-info .fmeta { color: var(--muted); font-size: 12.5px; margin-top: 3px; }
.file-actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }

.link-box {
  display: flex; align-items: center; gap: 8px; background: #f0f4f1;
  border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px; margin-top: 6px;
}
.link-box input { border: none; background: transparent; font-size: 12.5px; color: var(--green-dark); flex: 1; }
.link-box button { padding: 5px 10px; font-size: 12px; }

.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.flash.success { background: #e7f5ec; color: var(--green-dark); border: 1px solid #bfe3cd; }
.flash.error { background: #fbeae8; color: var(--danger); border: 1px solid #f3c6c0; }

.empty { text-align: center; color: var(--muted); padding: 30px 10px; font-size: 14px; }

.login-wrap { max-width: 380px; margin: 80px auto; padding: 0 20px; }
.small-note { font-size: 12.5px; color: var(--muted); margin-top: 8px; }

/* Upload progress */
.upload-status { margin-top: 14px; }
.progress-track { background: #eef1ee; border-radius: 6px; height: 10px; overflow: hidden; }
.progress-bar { background: var(--green); height: 100%; width: 0%; transition: width .2s; }
.progress-text { font-size: 12.5px; color: var(--muted); margin-top: 6px; }