:root {
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-soft: #f8faff;
  --text: #0f172a;
  --muted: #52607a;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #dbe4f0;
  --shadow: 0 16px 45px -28px rgba(15, 23, 42, 0.35);
  --radius: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at top right, #e0edff 0%, var(--bg) 28%, var(--bg) 100%);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

.site-header {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(219, 228, 240, 0.8);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: .9rem; }
.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  object-fit: contain;
  border: 1px solid var(--border);
  background: #fff;
  padding: .35rem;
}
.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.brand h1 { margin: 0; font-size: 1.2rem; }
.brand p { margin: .2rem 0 0; color: var(--muted); font-size: .92rem; }

.nav-links { display: flex; gap: .5rem; flex-wrap: wrap; }
.nav-links a {
  padding: .52rem .85rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
}
.nav-links a:hover { background: #e9f0ff; border-color: #cbddff; text-decoration: none; }

.content-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
  margin-top: 1rem;
}

.lead { color: var(--muted); margin-top: .35rem; }
.alert {
  border-radius: 12px;
  padding: .75rem .9rem;
  margin-top: .9rem;
  font-size: .95rem;
  border: 1px solid transparent;
}
.alert-error {
  background: #fff1f2;
  border-color: #fecdd3;
  color: #9f1239;
}

.list-grid {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.list-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  background: var(--surface-soft);
}

.list-item strong { display: block; margin-bottom: .4rem; }
.meta-line { color: var(--muted); font-size: .93rem; margin-top: .2rem; }

.form-grid {
  display: grid;
  gap: .8rem;
  margin-top: 1rem;
  max-width: 420px;
}

.input {
  border: 1px solid #c9d5e7;
  border-radius: 12px;
  padding: .72rem .9rem;
  font-size: 1rem;
  width: 100%;
}

.btn {
  border: none;
  border-radius: 12px;
  padding: .68rem .95rem;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--primary-dark); }
.btn-secondary { background: #e5edff; color: #1e3a8a; }
.btn-secondary:hover { background: #d8e4ff; }

.actions { display: flex; gap: .45rem; flex-wrap: wrap; margin-top: .6rem; }
.site-footer {
  margin-top: 1.1rem;
  background: rgba(255,255,255,0.92);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1rem;
  text-align: center;
  color: var(--muted);
}
.user-chip {
  display: inline-flex;
  gap: .3rem;
  align-items: center;
  background: #eef4ff;
  color: #12316f;
  padding: .38rem .62rem;
  border-radius: 999px;
  font-size: .88rem;
  margin: .45rem 0;
}

.empty-state {
  border: 1px dashed #b9cadf;
  border-radius: 14px;
  background: #f9fbff;
  padding: 1rem;
  color: var(--muted);
}