:root {
  --bg: #0A0F16;
  --bg-panel: #111927;
  --line: #223046;
  --text: #E7ECF3;
  --text-dim: #8FA1B8;
  --accent: #49D7C9;
  --accent-dim: #2A6B64;
  --warn: #F2A65A;
  --fail: #E8615A;
  --pass: #49D7C9;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(73, 215, 201, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(73, 215, 201, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
  z-index: 0;
}

.topbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 28px clamp(20px, 6vw, 72px) 0;
}

.brand { display: flex; align-items: baseline; gap: 10px; }

.brand-mark {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 22px;
}

.brand-name {
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.01em;
}

.topbar-note {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
}

main {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(48px, 8vw, 96px) 24px 64px;
}

.hero h1 {
  font-size: clamp(32px, 5.2vw, 52px);
  line-height: 1.08;
  font-weight: 600;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 56ch;
  margin: 0 0 40px;
}

.scan-form {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}

#url-input {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  padding: 15px 18px;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s ease;
}

#url-input::placeholder { color: #566578; }

#url-input:focus {
  border-color: var(--accent);
}

#scan-btn {
  background: var(--accent);
  color: #06201D;
  border: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  padding: 15px 26px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.15s ease;
  white-space: nowrap;
}

#scan-btn:hover { background: #5EE6D8; }
#scan-btn:active { transform: scale(0.98); }

#scan-btn:disabled {
  background: var(--accent-dim);
  color: #0d2a27;
  cursor: not-allowed;
}

.disclaimer {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.55;
  border-left: 2px solid var(--line);
  padding-left: 14px;
  max-width: 56ch;
}

.disclaimer strong { color: var(--warn); }

.status {
  margin-top: 40px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dim);
}

.status.is-error { color: var(--fail); }

.results {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  padding-top: 40px;
}

.results-head {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 32px;
}

.score-badge {
  width: 76px;
  height: 76px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  color: var(--accent);
}

.score-badge.grade-c, .score-badge.grade-d { border-color: var(--warn); color: var(--warn); }
.score-badge.grade-f { border-color: var(--fail); color: var(--fail); }

#results-title {
  font-size: 22px;
  margin: 0 0 6px;
  font-weight: 600;
  word-break: break-all;
}

#results-meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  margin: 0;
}

.checks-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.check-item {
  border: 1px solid var(--line);
  background: var(--bg-panel);
  border-radius: 10px;
  padding: 16px 18px;
}

.check-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.check-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-family: var(--font-mono);
}

.check-icon.pass { background: rgba(73, 215, 201, 0.15); color: var(--pass); }
.check-icon.fail { background: rgba(232, 97, 90, 0.15); color: var(--fail); }

.check-label {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 500;
}

.check-why {
  font-size: 13.5px;
  color: var(--text-dim);
  margin: 8px 0 0 34px;
  line-height: 1.5;
}

.check-fix {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--warn);
  background: rgba(242, 166, 90, 0.08);
  border-radius: 6px;
  padding: 8px 10px;
  margin: 10px 0 0 34px;
  word-break: break-word;
}

.check-value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  margin: 8px 0 0 34px;
  word-break: break-all;
}

footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px;
  font-size: 12.5px;
  color: #4B5A6E;
}

@media (max-width: 560px) {
  .scan-form { flex-direction: column; }
  .results-head { align-items: flex-start; }
}