/* ─── Reset & Variables ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d0f12;
  --bg2:       #13161b;
  --bg3:       #1a1e25;
  --bg4:       #222730;
  --border:    #2a2f3b;
  --border2:   #353d4d;
  --text:      #e2e8f0;
  --text2:     #8892a4;
  --text3:     #50596a;
  --accent:    #4ade80;
  --accent2:   #22c55e;
  --accent-glow: rgba(74,222,128,0.12);
  --warn:      #fbbf24;
  --warn-bg:   rgba(251,191,36,0.08);
  --fail:      #f87171;
  --fail-bg:   rgba(248,113,113,0.08);
  --pass:      #4ade80;
  --pass-bg:   rgba(74,222,128,0.08);
  --info:      #60a5fa;
  --info-bg:   rgba(96,165,250,0.08);
  --radius:    10px;
  --mono:      'Space Mono', monospace;
  --sans:      'DM Sans', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 14px;
  line-height: 1.6;
}

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }

/* ---- Background Effects ---- */

.bg-grid {
	position: fixed;
	inset: 0;
	pointer-events: none;
	z-index: 0;
	background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
		linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
	background-size: 48px 48px;
	mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
}

.bg-glow {
	position: fixed;
	border-radius: 50%;
	pointer-events: none;
	z-index: 0;
	filter: blur(120px);
	opacity: 0.14;
}
.bg-glow--1 {
	width: 600px;
	height: 600px;
	background: var(--accent);
	top: -200px;
	right: -150px;
}
.bg-glow--2 {
	width: 500px;
	height: 500px;
	background: var(--accent2);
	bottom: 20%;
	left: -200px;
}

/* ─── Header ────────────────────────────────────────────────── */
.header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(10, 10, 10, 0.85);
	backdrop-filter: blur(16px);
	-webkit-backdrop-filter: blur(16px);
	border-bottom: 1px solid var(--border);
}

.header-inner {
	max-width: 1280px;
	margin: 0 auto;
	padding: 0 28px;
	height: 58px;
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.logo {
	display: flex;
	align-items: center;
	gap: 10px;
	font-family: var(--font-display);
	font-weight: 700;
	font-size: 17px;
	letter-spacing: -0.02em;
	color: var(--text);
}

.header-nav {
	display: flex;
	align-items: center;
	gap: 14px;
}
.header-nav a {
	text-decoration: none;
	margin-left: 15px;
}

.nav-tag {
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}
.nav__logo-bracket {
	color: var(--accent);
}

.btn-header {
	background: var(--accent);
	color: #0a0a0a;
	border: none;
	border-radius: var(--radius-sm);
	padding: 7px 16px;
	font-family: var(--font-display);
	font-weight: 600;
	font-size: 13px;
	cursor: pointer;
	transition:
		background 0.15s,
		transform 0.1s;
}
.btn-header:hover {
	background: var(--accent-dark);
	transform: translateY(-1px);
}
.btn-header:active {
	transform: scale(0.97);
}

/* ─── Main Layout ───────────────────────────────────────────── */
.app-main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 24px;
  align-items: start;
}

/* ─── Panels ────────────────────────────────────────────────── */
.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  z-index: 1;
}

.panel-left { display: flex; flex-direction: column; }
.panel-right { position: sticky; top: 80px; max-height: calc(100vh - 100px); overflow-y: auto; }

/* ─── URL Input Section ─────────────────────────────────────── */
.url-input-section { padding: 28px 28px 24px; border-bottom: 1px solid var(--border); }

.section-title {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.section-desc { color: var(--text2); font-size: 13px; margin-bottom: 20px; }

.input-row { display: flex; gap: 10px; margin-bottom: 14px; }

.input-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0 14px;
  gap: 10px;
  transition: border-color 0.2s;
}
.input-wrapper:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.input-icon { color: var(--text3); flex-shrink: 0; }

#urlInput {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  padding: 12px 0;
}
#urlInput::placeholder { color: var(--text3); }

.btn-primary {
  display: flex; align-items: center; gap: 8px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: var(--radius);
  padding: 12px 20px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(74,222,128,0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  display: flex; align-items: center; gap: 6px;
  background: var(--bg3);
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  font-family: var(--sans);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-secondary:hover { border-color: var(--border2); color: var(--text); background: var(--bg4); }

.btn-sm { padding: 6px 12px; font-size: 12px; }

.quick-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.quick-label { font-size: 12px; color: var(--text3); }
.chip {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text2);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* ─── Score Banner ──────────────────────────────────────────── */
.score-banner {
  padding: 24px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  background: var(--bg3);
  animation: fadeIn 0.3s ease;
}

.score-ring-wrap { position: relative; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.score-ring { display: block; }
.score-number {
  position: absolute;
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.score-info { flex: 1; min-width: 120px; }
.score-grade { font-family: var(--mono); font-size: 28px; font-weight: 700; line-height: 1; }
.score-label { font-size: 11px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.8px; margin-top: 2px; }
.score-url { font-family: var(--mono); font-size: 11px; color: var(--text2); margin-top: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 180px; }

.score-summary { display: flex; flex-direction: column; gap: 6px; }
.summary-item { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text2); }
.summary-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-pass { background: var(--pass); }
.dot-warn { background: var(--warn); }
.dot-fail { background: var(--fail); }

.score-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ─── Loading / Error ───────────────────────────────────────── */
.loading-state, .error-state {
  padding: 48px 28px;
  text-align: center;
  color: var(--text2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.error-state svg { color: var(--fail); }
.error-note { font-size: 12px; color: var(--text3); max-width: 320px; }

/* ─── Tabs ──────────────────────────────────────────────────── */
.results-area { padding: 24px 28px; }

.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 20px;
}

.tab {
  flex: 1;
  background: transparent;
  border: none;
  border-radius: 7px;
  padding: 8px 12px;
  color: var(--text2);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--bg4); color: var(--text); box-shadow: 0 1px 4px rgba(0,0,0,0.3); }

/* ─── Header Cards ──────────────────────────────────────────── */
.header-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.15s;
  animation: slideUp 0.25s ease both;
}

.header-card:hover { border-color: var(--border2); }
.header-card.pass { border-left: 3px solid var(--pass); }
.header-card.warn { border-left: 3px solid var(--warn); }
.header-card.fail { border-left: 3px solid var(--fail); }
.header-card.info { border-left: 3px solid var(--info); }

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
}

.card-status-icon { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.card-status-icon.pass { background: var(--pass-bg); color: var(--pass); }
.card-status-icon.warn { background: var(--warn-bg); color: var(--warn); }
.card-status-icon.fail { background: var(--fail-bg); color: var(--fail); }
.card-status-icon.info { background: var(--info-bg); color: var(--info); }

.card-name {
  flex: 1;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.card-badge {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 3px 8px;
  border-radius: 99px;
}
.card-badge.pass { background: var(--pass-bg); color: var(--pass); }
.card-badge.warn { background: var(--warn-bg); color: var(--warn); }
.card-badge.fail { background: var(--fail-bg); color: var(--fail); }
.card-badge.info { background: var(--info-bg); color: var(--info); }

.card-chevron { color: var(--text3); transition: transform 0.2s; flex-shrink: 0; }
.card-header.open .card-chevron { transform: rotate(180deg); }

.card-body { display: none; padding: 0 16px 16px; border-top: 1px solid var(--border); }
.card-body.open { display: block; }

.card-value {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text2);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  margin: 12px 0 10px;
  word-break: break-all;
  white-space: pre-wrap;
  line-height: 1.7;
  position: relative;
}

.card-value-label {
  font-size: 10px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-top: 12px;
  margin-bottom: 4px;
}

.card-desc { font-size: 12px; color: var(--text2); line-height: 1.7; }
.card-recommendation { font-size: 12px; color: var(--warn); margin-top: 8px; line-height: 1.6; }
.card-recommendation.fail { color: var(--fail); }
.card-recommendation.pass { color: var(--pass); }

.directives-list { margin: 10px 0 0; display: flex; flex-direction: column; gap: 4px; }
.directive-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 11px; padding: 6px 10px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-family: var(--mono);
}
.directive-key { color: var(--accent); font-weight: 700; white-space: nowrap; }
.directive-val { color: var(--text2); word-break: break-all; }
.directive-note { color: var(--text3); font-style: italic; font-family: var(--sans); font-size: 11px; }

/* ─── Raw Headers ───────────────────────────────────────────── */
.raw-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 11px;
}
.raw-table th {
  text-align: left;
  color: var(--text3);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.raw-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.raw-table tr:last-child td { border-bottom: none; }
.raw-table .raw-key { color: var(--accent); width: 220px; word-break: break-all; }
.raw-table .raw-val { color: var(--text2); word-break: break-all; }
.raw-table tr:hover td { background: var(--bg3); }

.raw-search-row { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; }
.raw-search {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.15s;
}
.raw-search:focus { border-color: var(--accent); }
.raw-count { font-size: 11px; color: var(--text3); white-space: nowrap; }

/* ─── Reference Panel ───────────────────────────────────────── */
.reference-section { padding: 24px 20px; }
.panel-title {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}

.filter-bar { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.filter-chip {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text3);
  cursor: pointer;
  transition: all 0.15s;
}
.filter-chip:hover { color: var(--text); border-color: var(--border2); }
.filter-chip.active { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

.ref-item {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--bg3);
}
.ref-item:hover { border-color: var(--border2); background: var(--bg4); }

.ref-item-header { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.ref-name { font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--text); flex: 1; }
.ref-priority {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 2px 7px;
  border-radius: 99px;
}
.ref-priority.critical { background: var(--fail-bg); color: var(--fail); }
.ref-priority.recommended { background: var(--warn-bg); color: var(--warn); }
.ref-priority.optional { background: var(--info-bg); color: var(--info); }
.ref-desc { font-size: 11px; color: var(--text3); line-height: 1.5; }

/* ─── Info/Performance grid ─────────────────────────────────── */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.info-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  animation: slideUp 0.25s ease both;
}
.info-card-label { font-size: 10px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.7px; margin-bottom: 6px; }
.info-card-value { font-family: var(--mono); font-size: 13px; color: var(--text); word-break: break-all; }
.info-card-value.good { color: var(--pass); }
.info-card-value.warn { color: var(--warn); }
.info-card-value.bad { color: var(--fail); }

/* ─── Empty states ──────────────────────────────────────────── */
.empty-tab { padding: 40px 0; text-align: center; color: var(--text3); font-size: 13px; }

/* ─── Toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg4);
  border: 1px solid var(--border2);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 13px;
  opacity: 0;
  transition: all 0.25s;
  pointer-events: none;
  z-index: 999;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ─── Footer ────────────────────────────────────────────────── */
.footer {
	background: var(--surface-2);
	border-top: 1px solid var(--border);
	padding: 20px 16px;
	text-align: center;
	z-index: 10;
}

.footer-inner {
	max-width: var(--content-width);
	margin: 0 auto;
}
.footer-inner span {
	font-size: 12px;
	color: var(--text-muted);
}
.footer-inner a {
	color: var(--accent);
	text-decoration: none;
}
.footer-inner a:hover {
	text-decoration: underline;
}
.footer__logo {
	font-family: var(--font-mono);
	font-size: 1rem;
	color: var(--text);
	margin-bottom: 0.75rem;
}
.footer__logo a {
	color: var(--text);
	text-decoration: none;
	cursor: pointer;
}
.footer__logo a:hover {
	text-decoration: underline;
}

.cursor-glow {
	position: fixed;
	left: 0;
	top: 0;
	width: 260px;
	height: 260px;
	pointer-events: none;
	border-radius: 50%;
	background: radial-gradient(circle, rgba(0, 200, 150, 0.22) 0%, transparent 60%);
	filter: blur(18px);
	opacity: 0;
	transform: translate(-50%, -50%);
	transition: opacity 0.24s ease;
	mix-blend-mode: screen;
	z-index: 9999;
}

/* ─── Animations ────────────────────────────────────────────── */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .app-main { grid-template-columns: 1fr; }
  .panel-right { position: static; max-height: none; }
  .info-grid { grid-template-columns: 1fr; }
  .tabs { overflow-x: auto; }
  .score-banner { flex-wrap: wrap; }
}

@media (max-width: 540px) {
  .app-main { padding: 16px; }
  .url-input-section { padding: 20px 16px; }
  .input-row { flex-direction: column; }
  .score-banner { padding: 16px; }
  .results-area { padding: 16px; }
}