:root{
  /* Color palette (clean, minimal) */
  --bg: #f7fafc;         /* very light gray */
  --surface: #ffffff;    /* card surfaces */
  --muted: #6b7280;      /* subdued text */
  --text: #0f172a;       /* primary text */
  --primary: #2563eb;    /* primary accent (blue) */
  --accent: #06b6d4;     /* subtle accent (teal) */
  --success: #16a34a;
  --danger: #ef4444;
  --radius: 10px;
  --gap: 12px;
  --shadow: 0 8px 30px rgba(16,24,40,0.06);
  --max-width: 1100px;
  --container-pad: 20px;
  --nav-height: 48px;    /* slim navbar target */
  --nav-font-size: 0.95rem;
}

/* Typography & base */
html,body{ height:100%; }
body{
  margin:0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* NAVBAR: override Bootstrap to be slim and minimal */
.navbar {
  min-height: var(--nav-height);
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
  background: transparent;
  border-bottom: 1px solid rgba(15,23,42,0.04);
  box-shadow: none;
}
.navbar .container {
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}
.navbar-brand {
  font-weight:600;
  font-size: 1rem;
  padding-right: 0.5rem;
  color:var(--text);
}
.navbar-toggler { padding: 0.35rem 0.5rem; border: 0; }
.navbar-toggler-icon { background-size: 18px 18px; }

/* nav links */
.navbar-nav .nav-link .nav-usertile{
  padding: 0.5rem 0.6rem;
  font-size: var(--nav-font-size);
  color: rgba(15,23,42,0.9);
  border-radius: 6px;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  background: rgba(37,99,235,0.04);
  color: var(--primary);
  text-decoration: none;
}

/* helper to push items to the right */
.nav-end { margin-left: auto; }

/* Compact the navbar brand + links on small screens */
@media (max-width: 575.98px) {
  .navbar-brand { font-size: 0.98rem; }
  .navbar-nav .nav-link { padding: 0.4rem 0.6rem; }
}

/* Layout container adjustments */
.container, .waste-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--container-pad);
  box-sizing: border-box;
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  box-sizing: border-box;
}

/* Buttons: align with palette and minimal */
.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:8px 12px;
  border-radius:8px;
  font-size:0.95rem;
  cursor:pointer;
  border:0;
  text-decoration:none;
}
.btn-full { width:100%; }
.btn-primary {
  background:var(--primary);
  color:#fff;
  box-shadow: 0 6px 18px rgba(37,99,235,0.08);
}
.btn-ghost {
  background:transparent;
  border:1px solid rgba(15,23,42,0.06);
  color:var(--text);
}
.btn-outline {
  background:transparent;
  border:1px solid rgba(15,23,42,0.06);
  color:var(--text);
}

/* Small / danger buttons */
.btn-sm { padding:6px 8px; font-size:0.85rem; border-radius:6px; }
.btn-danger { background:transparent; border:1px solid rgba(239,68,68,0.12); color:var(--danger); }

/* Clean focus outline */
:focus { outline: 3px solid rgba(37,99,235,0.08); outline-offset: 2px; }

/* Forms */
.form-field, .form-row { display:flex; flex-direction:column; gap:6px; margin-bottom:8px; }
label, .form-label { font-size:0.9rem; color:#334155; }
.form-input, input[type="text"], input[type="email"], .upload-input {
  padding:10px 12px;
  border-radius:8px;
  border:1px solid #e6eef8;
  background:#fff;
  font-size:0.95rem;
  box-sizing:border-box;
}
.validation, .validation-msg, .validation-error, .validation-summary { color:var(--danger); font-size:0.9rem; margin-top:6px; }

/* Search */
.search-form { display:flex; gap:8px; align-items:center; }
.search-input { padding:8px 10px; border-radius:8px; border:1px solid rgba(15,23,42,0.06); }

/* File grid and cards */
.file-grid {
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap:16px;
  margin-top:16px;
}
.file-card {
  display:flex;
  flex-direction:column;
  border-radius:10px;
  overflow:hidden; /* ensure top's background spans full width */
  background:var(--surface);
  box-shadow:0 6px 18px rgba(15,23,42,0.04);
  border:1px solid rgba(15,23,42,0.03);
}

/* Top area uses the same filetype classes for background */
.file-card-top {
  padding:14px;
  color:#fff;
  display:flex;
  align-items:center;
}
.file-card-top .file-card-top-inner {
  display:flex;
  align-items:center;
  gap:12px;
  width:100%;
}
.file-thumb-large {
  width:56px;
  height:56px;
  border-radius:8px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:0.9rem;
  box-shadow: 0 6px 18px rgba(15,23,42,0.08);
  flex:0 0 56px;
  background: rgba(255,255,255,0.12);
}
.file-card-top .file-title {
  font-size:1rem;
  font-weight:600;
  color:inherit;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* Bottom area: neutral surface with actions */
.file-card-bottom {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px;
  background:var(--surface);
  color:var(--text);
}
.file-meta-left { display:flex; gap:10px; align-items:center; }
.file-meta-text { display:flex; flex-direction:column; }
.file-meta-owner { font-size:0.95rem; color:var(--text); }
.file-meta-date { font-size:0.85rem; color:var(--muted); }

/* Filetype specific backgrounds for the top area */
.file-card-top.file-thumb.pdf { background: linear-gradient(180deg,#e63946,#d62828); }
.file-card-top.file-thumb.doc { background: linear-gradient(180deg,#2b6ef9,#1e57d0); }
.file-card-top.file-thumb.xls { background: linear-gradient(180deg,#1aa053,#128c45); }
.file-card-top.file-thumb.ppt { background: linear-gradient(180deg,#ff7b2d,#ff5a1f); }
.file-card-top.file-thumb.image { background: linear-gradient(135deg,#6ee7b7,#60a5fa); color:#083344; }
.file-card-top.file-thumb.txt { background: linear-gradient(180deg,#94a3b8,#64748b); }
.file-card-top.file-thumb.url { background: linear-gradient(180deg,#f59e0b,#d97706); }
.file-card-top.file-thumb.zip { background: linear-gradient(180deg,#9ca3ff,#6366f1); }
.file-card-top.file-thumb.generic { background: linear-gradient(180deg,#cbd5e1,#94a3b8); color:#04263a; }

/* Ensure large icon text color adapts when top area has different color scheme */
.file-card-top.file-thumb.image .file-thumb-large,
.file-card-top.file-thumb.generic .file-thumb-large { color: inherit; }
.file-card-top .file-thumb-large { color:#fff; background: rgba(255,255,255,0.12); }

/* User grid / user card */
.user-grid {
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap:16px;
  margin-top:12px;
}
.user-card {
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:0; /* top/bottom sections manage their padding */
  overflow:hidden;
}
.user-card-top {
  display:flex;
  gap:12px;
  align-items:center;
  padding:12px;
  background: linear-gradient(180deg, rgba(15,23,42,0.02), rgba(255,255,255,0.06));
}
.user-avatar {
  width:48px;
  height:48px;
  border-radius:10px;
  background: linear-gradient(135deg,#eef2ff,#e6f0ff);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  color: #0b1220;
  font-size:1.05rem;
  flex:0 0 48px;
}
.user-info { display:flex; flex-direction:column; }
.user-name { font-weight:600; }
.user-email { color:var(--muted); font-size:0.95rem; }

/* user card bottom */
.user-card-bottom {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:8px;
  padding:10px 12px;
  background:var(--surface);
}

/* small meta and actions */
.user-meta { display:flex; gap:10px; align-items:center; color:var(--muted); font-size:0.9rem; }
.user-actions { display:flex; gap:8px; align-items:center; }

/* small responsive tweaks */
@media (max-width:520px){
  .file-card { grid-column: span 1; }
  .pricing-grid { flex-direction:column; }
}