*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a56db;
  --primary-dark: #1341b0;
  --success: #057a55;
  --danger: #c81e1e;
  --warning: #9f580a;
  --bg: #f4f6fb;
  --card: #fff;
  --border: #dde2ef;
  --text: #1e2a3b;
  --muted: #6b7280;
  --radius: 8px;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  min-height: 100vh;
}

/* NAVBAR */
.navbar {
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 54px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.nav-brand { font-size: 1.2rem; font-weight: 700; letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a { color: #fff; text-decoration: none; font-size: .92rem; opacity: .9; }
.nav-links a:hover { opacity: 1; text-decoration: underline; }
.nav-user { font-size: .88rem; opacity: .8; }
.btn-logout {
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 5px;
  padding: 4px 12px;
  font-size: .85rem;
}

/* CONTAINER */
.container { max-width: 960px; margin: 0 auto; padding: 28px 16px; }
.container-wide { max-width: 1200px; margin: 0 auto; padding: 28px 16px; }

/* CARDS */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary);
  border-bottom: 2px solid var(--border);
  padding-bottom: 8px;
}

/* PAGE TITLE */
.page-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 20px; color: var(--text); }

/* FORMS */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: 5px; color: var(--text); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .93rem;
  background: #fff;
  color: var(--text);
  transition: border-color .2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background .2s, opacity .2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 4px 12px; font-size: .82rem; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ALERTS */
.alert {
  padding: 10px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: .9rem;
  font-weight: 500;
}
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #6ee7b7; }
.alert-danger  { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fcd34d; }
.alert-info    { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }

/* TABLES */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
thead th {
  background: #f1f5fb;
  padding: 10px 12px;
  text-align: left;
  font-weight: 700;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
tbody td { padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f8faff; }

/* BADGES */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
}
.badge-green  { background: #d1fae5; color: #065f46; }
.badge-red    { background: #fee2e2; color: #991b1b; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-blue   { background: #dbeafe; color: #1e40af; }

/* PROGRESS BAR */
.progress-wrap { background: #e5e7eb; border-radius: 20px; height: 14px; overflow: hidden; margin: 4px 0; }
.progress-bar  { height: 100%; border-radius: 20px; background: var(--primary); transition: width .4s; }
.progress-bar.danger { background: var(--danger); }
.progress-bar.warning { background: #f59e0b; }

/* USAGE GRID */
.usage-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.usage-item { background: #f8faff; border: 1px solid var(--border); border-radius: 8px; padding: 14px; }
.usage-item .item-name { font-weight: 700; font-size: .9rem; margin-bottom: 6px; }
.usage-item .item-count { font-size: .82rem; color: var(--muted); margin-bottom: 4px; }

/* LOGIN PAGE */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a56db 0%, #1341b0 100%);
}
.login-box {
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 8px 32px rgba(0,0,0,.18);
}
.login-logo { text-align: center; font-size: 2rem; margin-bottom: 6px; }
.login-title { text-align: center; font-size: 1.2rem; font-weight: 700; margin-bottom: 24px; color: var(--primary); }

/* TABS */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  padding: 9px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: .92rem;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color .2s;
}
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* UPLOAD AREA */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 28px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: #fafbff;
}
.upload-area:hover, .upload-area.dragover {
  border-color: var(--primary);
  background: #eef3ff;
}
.upload-area .upload-icon { font-size: 2.2rem; margin-bottom: 8px; }
.upload-area p { color: var(--muted); font-size: .9rem; }

/* STATS CARDS */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.stat-card .stat-num { font-size: 1.8rem; font-weight: 800; color: var(--primary); }
.stat-card .stat-label { font-size: .82rem; color: var(--muted); margin-top: 2px; }

/* RESPONSIVE */
@media (max-width: 640px) {
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .container, .container-wide { padding: 16px 10px; }
  .card { padding: 16px; }
}