:root {
  --green: #76BC21;
  --green-light: #9bd44f;
  --green-dark: #5fa31b;
  --bg-1: #050a04;
  --bg-2: #0e1c08;
  --bg-3: #142a0d;
  --text: #e8efe1;
  --text-muted: #aaba98;
  --text-faint: #758770;
  --border: rgba(118, 188, 33, 0.18);
  --border-hover: rgba(118, 188, 33, 0.5);
  --card-bg: rgba(20, 35, 15, 0.45);
  --card-bg-hover: rgba(30, 50, 20, 0.6);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;
  background: radial-gradient(circle at 18% 8%, var(--bg-3) 0%, var(--bg-2) 45%, var(--bg-1) 100%) fixed;
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
.bg-decor {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(800px circle at 90% 90%, rgba(118,188,33,.06), transparent 40%),
    radial-gradient(600px circle at 10% 100%, rgba(118,188,33,.04), transparent 40%);
}
a { color: var(--green-light); text-decoration: none; }
a:hover { color: var(--green); }

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: .85rem 2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(5, 10, 4, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.topbar-brand { display: flex; align-items: center; gap: .75rem; }
.topbar-brand img { height: 34px; filter: drop-shadow(0 1px 8px rgba(118,188,33,.2)); }
.topbar-brand .brand-text { font-weight: 600; letter-spacing: .02em; color: var(--text); }
.topbar-brand .brand-text small { color: var(--green-light); font-weight: 400; margin-left: .35rem; font-size: .85rem; }
.topbar-actions { display: flex; align-items: center; gap: .75rem; }
.user { font-size: .9rem; color: var(--text-muted); display: flex; align-items: center; gap: .4rem; }
.user::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 8px rgba(118,188,33,.6);
}

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 2.5rem 2rem 4rem; position: relative; z-index: 1; }
.container-narrow { max-width: 760px; }
.page-title { font-size: 2.1rem; font-weight: 600; margin: 0 0 .35rem; letter-spacing: -.01em; }
.page-sub { color: var(--text-muted); margin: 0 0 2.5rem; font-size: 1.05rem; }
h2 { font-size: 1.3rem; font-weight: 600; margin: 2rem 0 1rem; color: var(--green-light); }
h2:first-of-type { margin-top: 0; }

/* Cards grid */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
.card {
  display: flex; flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  transition: all .18s ease;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(400px circle at 50% -20%, rgba(118,188,33,.08), transparent 50%);
  opacity: 0; transition: opacity .2s ease;
}
.card:hover {
  border-color: var(--border-hover);
  background: var(--card-bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0,0,0,.3), 0 0 0 1px rgba(118,188,33,.15);
}
.card:hover::before { opacity: 1; }
.card-icon {
  width: 38px; height: 38px;
  color: var(--green); margin-bottom: .9rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: rgba(118,188,33,.1);
  border: 1px solid rgba(118,188,33,.2);
  position: relative; z-index: 1;
}
.card-icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card-title { font-weight: 600; font-size: 1.05rem; margin-bottom: .25rem; position: relative; z-index: 1; }
.card-desc { color: var(--text-muted); font-size: .85rem; line-height: 1.5; position: relative; z-index: 1; }
.card-arrow {
  position: absolute; top: 1.5rem; right: 1.5rem;
  color: var(--text-faint); transition: all .15s ease;
}
.card:hover .card-arrow { color: var(--green); transform: translate(2px, -2px); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .6rem 1.2rem; border-radius: 9px; font: inherit; font-size: .9rem; font-weight: 500;
  border: 1px solid transparent; cursor: pointer; transition: all .15s ease;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
  color: #0c1d04; font-weight: 600;
  box-shadow: 0 2px 12px rgba(118,188,33,.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 18px rgba(118,188,33,.45); color: #0c1d04; }
.btn-primary:disabled { opacity: .6; cursor: progress; transform: none; }
.btn-ghost {
  border-color: var(--border); color: var(--text); background: transparent;
}
.btn-ghost:hover { background: rgba(118,188,33,.12); border-color: var(--border-hover); color: var(--text); }
.btn-sm { padding: .35rem .8rem; font-size: .85rem; }

/* Login */
.page-login { display: flex; }
.page-login .centered {
  flex: 1; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 2rem; position: relative; z-index: 1;
}
.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2.5rem 2.5rem 2.25rem;
  max-width: 400px; width: 100%;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 40px rgba(0,0,0,.4);
  display: flex; flex-direction: column; gap: 1rem;
}
.login-logo { height: 60px; margin: 0 auto .5rem; display: block; filter: drop-shadow(0 4px 24px rgba(118,188,33,.25)); }
.login-card h1 { margin: 0; font-size: 1.5rem; text-align: center; font-weight: 600; }
.login-card .muted { text-align: center; font-size: .9rem; color: var(--text-muted); margin: 0 0 .5rem; }
.login-card label { display: flex; flex-direction: column; gap: .4rem; font-size: .8rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: .05em; }
.login-card button { margin-top: .5rem; justify-content: center; padding: .8rem 1.2rem; }

/* Forms */
input[type=text], input[type=password], input[type=url], input[type=number], input[type=file] {
  background: rgba(0,0,0,.3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: .65rem .85rem;
  border-radius: 9px; font: inherit; font-size: .95rem;
  width: 100%;
}
input:focus, select:focus {
  outline: none; border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(118,188,33,.18);
}
input[type=file] { cursor: pointer; padding: .55rem .65rem; }

select {
  background: rgba(0,0,0,.3); border: 1px solid var(--border); color: var(--text);
  padding: .55rem .85rem; border-radius: 9px; font: inherit; font-size: .9rem;
}

/* Alerts */
.alert { padding: .75rem 1rem; border-radius: 9px; font-size: .85rem; }
.alert-error { background: rgba(220,38,38,.15); border: 1px solid rgba(220,38,38,.3); color: #fca5a5; }
.alert-ok    { background: rgba(118,188,33,.15); border: 1px solid rgba(118,188,33,.3); color: var(--green-light); }
.alert-info  { background: rgba(59,130,246,.12); border: 1px solid rgba(59,130,246,.25); color: #93c5fd; }

/* Tabs */
.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem; flex-wrap: wrap; }
.tab {
  background: transparent; color: var(--text-muted);
  border: 1px solid transparent; border-bottom: none;
  border-radius: 9px 9px 0 0; padding: .65rem 1.1rem; cursor: pointer;
  font: inherit; font-size: .9rem; transition: all .15s ease;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--card-bg); color: var(--green-light); border-color: var(--border); position: relative; top: 1px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Tool form */
.tool-form {
  display: flex; flex-direction: column; gap: 1rem; max-width: 480px;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 1.5rem;
}
.tool-form label { display: flex; flex-direction: column; gap: .4rem; font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.tool-form button { align-self: flex-start; }

.hint { font-size: .85rem; color: var(--text-muted); margin: .5rem 0 1rem; }

/* Responsive checker */
.control-bar { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.control-bar input[type=url] { flex: 1; min-width: 280px; }
.device-buttons { display: flex; gap: .35rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.device-buttons button {
  background: var(--card-bg); border: 1px solid var(--border); color: var(--text);
  padding: .45rem .9rem; border-radius: 8px; cursor: pointer; font: inherit; font-size: .85rem;
}
.device-buttons button:hover, .device-buttons button.active {
  border-color: var(--border-hover); background: rgba(118,188,33,.12); color: var(--green-light);
}
.preview-grid { display: flex; gap: 1.5rem; overflow-x: auto; padding-bottom: 1rem; align-items: flex-start; }
.preview-wrap { flex-shrink: 0; }
.preview-label { margin-bottom: .5rem; font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.preview-frame {
  border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; background: white;
  box-shadow: 0 4px 20px rgba(0,0,0,.3);
}
.preview-frame iframe { display: block; border: 0; background: white; }

/* Footer */
.footer {
  text-align: center; padding: 2rem; font-size: .8rem; color: var(--text-faint);
  position: relative; z-index: 1;
}
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--green-light); }

/* Loading state */
.loading::after {
  content: ""; display: inline-block; width: 14px; height: 14px;
  border: 2px solid currentColor; border-bottom-color: transparent; border-radius: 50%;
  margin-left: .5rem; animation: spin .8s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

::selection { background: var(--green); color: #0c1d04; }
*:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

/* Responsive */
@media (max-width: 640px) {
  .topbar { padding: .75rem 1rem; }
  .container { padding: 1.5rem 1rem 3rem; }
  .page-title { font-size: 1.6rem; }
  .topbar-brand .brand-text { display: none; }
}

/* Role badge */
.role-badge {
  display: none;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
  color: #0c1d04;
  font-size: .65rem;
  font-weight: 700;
  padding: .15rem .55rem;
  border-radius: 999px;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.role-badge.visible { display: inline-block; }