:root {
  --bg: #080808;
  --bg2: #0f0f0f;
  --bg3: #161616;
  --border: rgba(255,255,255,0.08);
  --border2: rgba(255,255,255,0.14);
  --lime: #C8FF57;
  --lime2: #a8e03a;
  --text: #f0f0f0;
  --muted: #888;
  --muted2: #555;
  --font-head: 'Syne', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-body: 'DM Sans', sans-serif;
  --radius: 6px;
  --radius-lg: 12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 480px;
  background-image:
    linear-gradient(rgba(200,255,87,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,255,87,0.035) 1px, transparent 1px);
  background-size: 60px 60px;
}

.auth-brand {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem 3rem;
}
.nav-logo {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
  width: max-content;
}
.nav-logo span {
  background: var(--lime);
  color: #080808;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.auth-copy {
  max-width: 720px;
  padding: 5rem 0;
}
.auth-kicker {
  font-family: var(--font-mono);
  color: var(--lime);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.auth-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(4rem, 7vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 1.5rem;
}
.auth-copy h1 em {
  color: var(--lime);
  font-style: normal;
}
.auth-copy p {
  max-width: 520px;
  color: var(--muted);
  font-size: 1.05rem;
}
.auth-foot {
  color: var(--muted2);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.auth-panel {
  display: flex;
  align-items: center;
  min-height: 100vh;
  padding: 2rem;
  background: rgba(15,15,15,0.82);
  border-left: 1px solid var(--border);
  backdrop-filter: blur(14px);
}
.auth-card {
  width: 100%;
}
.auth-card h2 {
  font-family: var(--font-head);
  font-size: 2.15rem;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.7rem;
}
.auth-card > p {
  color: var(--muted);
  margin-bottom: 1.6rem;
}
.auth-form {
  display: grid;
  gap: 0.95rem;
}
.field-label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.field-label input,
.field-label select {
  width: 100%;
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  background: #0b0b0b;
  color: var(--text);
  padding: 0.9rem;
  font: 400 1rem var(--font-body);
  outline: none;
}
.field-label select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--lime) 50%), linear-gradient(135deg, var(--lime) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.field-label input:focus,
.field-label select:focus {
  border-color: rgba(200,255,87,0.68);
  box-shadow: 0 0 0 3px rgba(200,255,87,0.1);
}
.auth-button {
  border: 0;
  border-radius: var(--radius);
  background: var(--lime);
  color: #080808;
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: 0.02em;
  padding: 0.95rem 1.1rem;
  text-transform: uppercase;
  transition: transform 0.15s, background 0.2s;
}
.auth-button:hover { background: var(--lime2); transform: translateY(-1px); }
.auth-button:disabled { cursor: not-allowed; opacity: 0.55; transform: none; }
.auth-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.auth-row a { color: var(--lime); }
.auth-message {
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  padding: 0.8rem 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.auth-message[data-type="error"] {
  border-color: rgba(255,95,87,0.42);
  background: rgba(255,95,87,0.08);
  color: #ffb4ae;
}
.auth-message[data-type="success"] {
  border-color: rgba(200,255,87,0.35);
  background: rgba(200,255,87,0.08);
  color: var(--lime);
}
.dashboard-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--border);
}
.dashboard-shell {
  grid-template-columns: minmax(0, 0.95fr) minmax(560px, 1.05fr);
}
.dashboard-actions {
  display: grid;
  gap: 0.9rem;
  margin: 1.5rem 0;
}
.action-tile {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  padding: 1.1rem 1.2rem;
  text-align: left;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}
.action-tile:hover {
  border-color: rgba(200,255,87,0.34);
  background: rgba(200,255,87,0.035);
  transform: translateY(-1px);
}
.action-tile span {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.action-tile strong {
  font-family: var(--font-head);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.action-tile small {
  color: var(--muted);
  font-size: 0.86rem;
}
.action-tile-button {
  font: inherit;
}
.metric {
  background: var(--bg);
  padding: 1.25rem;
}
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.3rem;
}
.small-button {
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.55rem 0.85rem;
  white-space: nowrap;
}
.small-button:hover {
  border-color: rgba(200,255,87,0.34);
}
.invoice-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--border);
  margin-bottom: 1.3rem;
}
.invoice-summary div {
  background: var(--bg);
  padding: 1rem;
}
.invoice-summary strong {
  display: block;
  color: var(--lime);
  font-family: var(--font-head);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}
.invoice-summary span {
  color: var(--muted);
  font-size: 0.8rem;
}
.invoice-table {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.invoice-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.7fr 0.7fr;
  gap: 1rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  padding: 0.9rem 1rem;
  font-size: 0.9rem;
}
.invoice-row:last-child { border-bottom: 0; }
.invoice-row:not(.invoice-head):hover {
  background: rgba(255,255,255,0.035);
  color: var(--text);
}
.invoice-head {
  color: var(--muted2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.paid-badge {
  width: max-content;
  border: 1px solid rgba(200,255,87,0.34);
  border-radius: 999px;
  color: var(--lime);
  padding: 0.1rem 0.55rem;
}
.integration-note {
  color: var(--muted2);
  font-size: 0.82rem;
  margin-top: 1rem;
}
.invoice-line-items {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--border);
  margin-top: 1rem;
}
.invoice-line-items div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  background: var(--bg);
  color: var(--muted);
  padding: 0.85rem 1rem;
}
.invoice-line-items strong {
  color: var(--text);
  font-family: var(--font-mono);
  white-space: nowrap;
}
.integration-note code {
  color: var(--lime);
  font-family: var(--font-mono);
}
.payments-panel {
  max-width: 980px;
}

.app-dashboard {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  background: #090909;
}
.side-menu {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: #0d0d0d;
  padding: 1rem;
}
.side-logo {
  margin-bottom: 1.6rem;
}
.side-nav {
  display: grid;
  gap: 0.35rem;
}
.side-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  padding: 0.62rem 0.7rem;
  font-size: 0.92rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.side-nav a:hover,
.side-nav a.active {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255,255,255,0.025);
}
.side-nav span {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}
.side-account {
  display: grid;
  gap: 0.2rem;
  margin-top: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem;
  background: var(--bg);
}
.side-account small {
  color: var(--muted2);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.side-account strong {
  font-family: var(--font-head);
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}
.side-account span {
  color: var(--muted);
  font-size: 0.76rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.side-logout {
  width: 100%;
  margin-top: 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0.65rem 0.85rem;
  text-align: left;
}
.side-logout:hover {
  border-color: rgba(255,95,87,0.36);
  color: #ffb4ae;
}
.dashboard-main {
  min-width: 0;
  padding: 1.25rem;
}
.dashboard-topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.15rem;
  margin-bottom: 1.15rem;
}
.dashboard-topbar .auth-kicker {
  margin-bottom: 0.45rem;
}
.dashboard-topbar h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 3vw, 3.1rem);
  letter-spacing: -0.04em;
  line-height: 1;
}
.dashboard-topbar span {
  color: var(--muted);
}
.dashboard-topbar strong {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.topbar-cta {
  display: inline-flex;
  white-space: nowrap;
  padding: 0.72rem 0.9rem;
  font-size: 0.8rem;
}
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--border);
  margin-bottom: 1rem;
}
.kpi-card {
  display: grid;
  gap: 0.3rem;
  background: var(--bg);
  padding: 1rem;
}
.kpi-card span,
.kpi-card small {
  color: var(--muted);
  font-size: 0.82rem;
}
.kpi-card strong {
  color: var(--text);
  font-family: var(--font-head);
  font-size: 1.65rem;
  letter-spacing: -0.04em;
}
.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 0.85rem;
}
.dashboard-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #0f0f0f;
  padding: 1rem;
}
.activity-panel {
  grid-column: 1 / -1;
}
.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}
.panel-head h2 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}
.panel-head p {
  color: var(--muted);
  font-size: 0.9rem;
}
.panel-badge {
  border: 1px solid var(--border2);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.65rem;
  white-space: nowrap;
}
.usage-bars {
  display: grid;
  gap: 0.85rem;
}
.usage-row {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) 52px;
  align-items: center;
  gap: 0.8rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.usage-row div {
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--bg3);
}
.usage-row i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--lime);
}
.usage-row strong {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: right;
}
.payment-total {
  display: grid;
  gap: 0.25rem;
  margin: 1.2rem 0;
}
.payment-total strong {
  color: var(--lime);
  font-family: var(--font-head);
  font-size: 2.1rem;
  letter-spacing: -0.05em;
  line-height: 1;
}
.payment-total span {
  color: var(--muted);
}
.panel-link {
  display: block;
  border: 1px solid rgba(200,255,87,0.28);
  border-radius: var(--radius);
  color: var(--lime);
  font-family: var(--font-head);
  font-weight: 700;
  padding: 0.68rem 0.8rem;
  text-align: center;
}
.activity-list {
  display: grid;
  gap: 0.65rem;
  list-style: none;
}
.activity-list li {
  display: flex;
  gap: 0.9rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 0.65rem;
}
.activity-list li:first-child {
  border-top: 0;
  padding-top: 0;
}
.activity-list span {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.admin-dashboard {
  grid-template-columns: 236px minmax(0, 980px);
}
.admin-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #0f0f0f;
  padding: 1rem;
}
.admin-login-form {
  max-width: 420px;
}
.admin-form {
  display: grid;
  gap: 1rem;
}
.admin-section {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}
.admin-section:first-child {
  border-top: 0;
  padding-top: 0;
}
.admin-section h2 {
  grid-column: 1 / -1;
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}
.admin-save {
  width: max-content;
}
.metric strong {
  display: block;
  color: var(--lime);
  font-family: var(--font-head);
  font-size: 1.7rem;
  letter-spacing: -0.04em;
}
.metric span {
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .auth-shell { grid-template-columns: 1fr; }
  .dashboard-shell { grid-template-columns: 1fr; }
  .auth-brand {
    min-height: 44vh;
    padding: 1.5rem;
  }
  .auth-copy {
    padding: 4rem 0 1rem;
  }
  .auth-copy h1 {
    font-size: clamp(3rem, 13vw, 4.6rem);
  }
  .auth-panel {
    min-height: auto;
    border-left: 0;
    border-top: 1px solid var(--border);
    padding: 1.5rem;
  }
  .app-dashboard {
    grid-template-columns: 1fr;
  }
  .admin-dashboard {
    grid-template-columns: 1fr;
  }
  .side-menu {
    position: static;
    height: auto;
  }
  .side-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .dashboard-topbar,
  .panel-head {
    flex-direction: column;
  }
  .kpi-grid,
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .activity-panel {
    grid-column: auto;
  }
}

@media (max-width: 520px) {
  .auth-row { flex-direction: column; }
  .dashboard-metrics { grid-template-columns: 1fr; }
  .invoice-summary { grid-template-columns: 1fr; }
  .invoice-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .invoice-head { display: none; }
  .page-head { flex-direction: column; }
  .side-nav {
    grid-template-columns: 1fr;
  }
  .dashboard-main {
    padding: 1rem;
  }
  .usage-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .admin-section {
    grid-template-columns: 1fr;
  }
  .usage-row strong {
    text-align: left;
  }
}