:root {
  --ink: #0a0a08;
  --ink-soft: #17170f;
  --paper: #f4f1e6;
  --surface: #ffffff;
  --surface-2: #faf8ef;
  --muted: #6e6a57;
  --border: rgba(10, 10, 8, 0.12);
  --lime: #cdfb3f;
  --lime-ink: #10230a;
  --coral: #ff5a36;
  --violet: #6a3dff;
  --focus: #6a3dff;
  --shadow-hard: 6px 6px 0 var(--ink);
  --font-display: 'Unbounded', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, sans-serif;
  --radius: 18px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --ink: #f4f1e6;
  --ink-soft: #e9e5d3;
  --paper: #0a0a08;
  --surface: #121209;
  --surface-2: #17170f;
  --muted: #9b9682;
  --border: rgba(244, 241, 230, 0.14);
  --shadow-hard: 6px 6px 0 #000000;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

body {
  font-family: var(--font-body);
  min-height: 100svh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0 0 0.4em;
  text-transform: none;
}

p { margin: 0 0 1em; color: var(--muted); }
a { color: inherit; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px);
  position: relative;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* grain overlay */
.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  opacity: 0.05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Nav */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0; gap: 16px; flex-wrap: wrap; position: relative; z-index: 5;
}
.brand {
  font-family: var(--font-display); font-weight: 700; font-size: 1.3rem;
  display: inline-flex; align-items: center; gap: 10px; color: var(--ink);
}
.brand .dot { width: 12px; height: 12px; background: var(--lime); border-radius: 3px; display: inline-block; transform: rotate(8deg); }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 0.92rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-weight: 500; }
.nav-links a:hover { color: var(--ink); }

.theme-toggle {
  background: var(--surface); border: 1.5px solid var(--border); color: var(--ink);
  border-radius: 999px; padding: 8px 14px; font-size: 0.8rem; cursor: pointer;
}
.theme-toggle:hover { border-color: var(--ink); }
.theme-toggle:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Buttons */
.btn {
  font-family: var(--font-body); font-weight: 700; font-size: 0.92rem;
  padding: 13px 22px; border-radius: 12px; border: 2px solid var(--ink);
  cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  text-decoration: none; position: relative;
  transition: transform 0.15s cubic-bezier(.2,.8,.2,1), box-shadow 0.15s ease;
}
.btn:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.btn-primary { background: var(--lime); color: var(--lime-ink); box-shadow: var(--shadow-hard); }
.btn-primary:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--ink); text-decoration: none; }
.btn-primary:active { transform: translate(1px, 1px); box-shadow: 3px 3px 0 var(--ink); }
.btn-dark { background: var(--ink); color: var(--paper); border-color: var(--ink); box-shadow: var(--shadow-hard); }
.btn-dark:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--coral); text-decoration: none; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--ink); box-shadow: none; }
.btn-ghost:hover { border-color: var(--ink); text-decoration: none; }
.btn-danger { background: var(--coral); color: #fff; border-color: var(--ink); box-shadow: var(--shadow-hard); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 14px; font-size: 0.8rem; border-radius: 9px; }

/* Cards */
.card {
  background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius);
  padding: clamp(18px, 3vw, 30px);
}
.card-hard {
  background: var(--surface); border: 2px solid var(--ink); border-radius: var(--radius);
  box-shadow: var(--shadow-hard); padding: clamp(18px, 3vw, 30px);
}

/* Forms */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--font-body); font-size: 0.95rem; padding: 12px 14px;
  border-radius: 10px; border: 1.5px solid var(--border); background: var(--surface-2); color: var(--ink);
}
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible {
  outline: 2px solid var(--focus); outline-offset: 1px; border-color: var(--focus);
}
.field-error { color: var(--coral); font-size: 0.8rem; margin-top: 6px; font-weight: 600; }
.field-hint { color: var(--muted); font-size: 0.78rem; margin-top: 6px; }
.banner { border: 1.5px solid var(--ink); border-radius: 12px; padding: 13px 16px; font-size: 0.88rem; margin-bottom: 16px; font-weight: 500; }
.banner-error { background: color-mix(in srgb, var(--coral) 14%, var(--surface)); }
.banner-success { background: color-mix(in srgb, var(--lime) 30%, var(--surface)); }
.banner-note { background: var(--surface-2); color: var(--muted); }

/* Badges / pills */
.pill { display: inline-flex; align-items: center; gap: 5px; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; padding: 5px 11px; border-radius: 999px; }
.pill-draft { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.pill-sent { background: color-mix(in srgb, var(--violet) 16%, var(--surface)); color: var(--violet); }
.pill-paid { background: var(--lime); color: var(--lime-ink); }
.pill-late { background: var(--coral); color: #fff; }
.pill-accepted { background: var(--lime); color: var(--lime-ink); }
.pill-refused { background: color-mix(in srgb, var(--coral) 16%, var(--surface)); color: var(--coral); }

/* Dashboard stat tiles */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.stat-tile { background: var(--surface); border: 2px solid var(--ink); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-hard); }
.stat-tile .label { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 700; }
.stat-tile .value { font-family: var(--font-display); font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 700; margin-top: 6px; }
.stat-tile.accent { background: var(--lime); color: var(--lime-ink); }
.stat-tile.accent .label { color: var(--lime-ink); opacity: 0.7; }

/* Tables */
.doc-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.doc-table th { text-align: left; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 10px 12px; border-bottom: 2px solid var(--ink); }
.doc-table td { padding: 14px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.doc-table tr:hover td { background: var(--surface-2); }

/* Empty states */
.empty-state { text-align: center; padding: 56px 20px; color: var(--muted); border: 2px dashed var(--border); border-radius: var(--radius); }
.empty-state .icon { font-size: 2.4rem; margin-bottom: 12px; }
.spinner { width: 20px; height: 20px; border-radius: 50%; border: 3px solid var(--border); border-top-color: var(--lime-ink); animation: spin 0.8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--paper); padding: 11px 20px; border-radius: 999px;
  font-size: 0.82rem; font-weight: 600; opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

footer.site-footer { margin-top: 48px; padding: 28px 0 40px; color: var(--muted); font-size: 0.8rem; border-top: 1.5px solid var(--border); position: relative; z-index: 5; }
footer.site-footer .links { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; }
footer.site-footer a { color: var(--muted); }
footer.site-footer a:hover { color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  .btn, .theme-toggle, .toast { transition: none; }
}