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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f4f6f9;
  color: #1a1a2e;
  line-height: 1.6;
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .75rem 2rem;
  background: #1a1a2e;
  color: #fff;
}
.nav-brand { font-weight: 600; letter-spacing: .03em; }
.nav-user { display: flex; align-items: center; gap: 1.25rem; font-size: .9rem; }
nav a { color: #a8d8ea; text-decoration: none; }
nav a:hover { text-decoration: underline; }

/* Layout */
main { max-width: 960px; margin: 2rem auto; padding: 0 1.25rem; }
h1 { margin-bottom: .25rem; }
h2 { margin: 1.25rem 0 .6rem; font-size: 1.1rem; }
.subtitle { color: #555; margin-bottom: 1.75rem; font-size: .95rem; }

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.card {
  background: #fff;
  border: 1px solid #dde1e7;
  border-radius: 8px;
  padding: 1.25rem;
}
.card--warning { border-color: #e5a100; background: #fffbe6; }

/* Buttons */
.btn {
  display: inline-block;
  margin-top: .75rem;
  padding: .45rem 1.2rem;
  background: #1a1a2e;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  font-size: .9rem;
  transition: background .15s;
}
.btn:hover { background: #2d2d52; }
.btn--danger { background: #c0392b; }
.btn--danger:hover { background: #a93226; }
.btn:disabled { background: #aaa; cursor: not-allowed; }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: .5rem 0 1rem; font-size: .9rem; }
th, td { padding: .5rem .75rem; text-align: left; border-bottom: 1px solid #e8eaed; }
th { background: #f0f2f5; font-weight: 600; }
tr:last-child td { border-bottom: none; }
code { font-size: .82rem; background: #f0f2f5; padding: .1rem .3rem; border-radius: 3px; }

/* Project list */
.project-list { list-style: none; margin: .5rem 0 1rem; }
.project-list li { padding: .45rem 0; border-bottom: 1px solid #e8eaed; }
.project-list li:last-child { border-bottom: none; }
.client-name { color: #777; font-size: .88rem; }

/* Error page */
.error-box {
  text-align: center;
  padding: 3rem 2rem;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #dde1e7;
  max-width: 480px;
  margin: 4rem auto;
}
.error-box h1 { color: #c0392b; margin-bottom: 1rem; }
.error-box p { color: #555; margin-bottom: 1.75rem; }

section { margin-bottom: 2rem; }