@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

:root {
  --font-display: 'Space Mono', monospace;
  --font-body: 'IBM Plex Sans', sans-serif;
  --bg: #0a0a0a;
  --bg-card: #141414;
  --bg-hover: #1a1a1a;
  --text: #e8e8e8;
  --text-muted: #888;
  --border: #222;
  --radius: 6px;
  --accent: #818CF8;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

header { border-bottom: 1px solid var(--border); padding: 16px 0; position: sticky; top: 0; background: var(--bg); z-index: 100; }
header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; color: var(--accent); }
nav { display: flex; gap: 24px; }
nav a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; }
nav a:hover { color: var(--text); text-decoration: none; }

.hero { padding: 50px 0 30px; text-align: center; }
.hero h1 { font-family: var(--font-display); font-size: 2.2rem; margin-bottom: 12px; }
.hero h1 span { color: var(--accent); }
.hero p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* Textarea */
.input-area { margin: 20px 0; }
.input-area textarea {
  width: 100%; min-height: 200px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); padding: 16px; font-family: var(--font-body);
  font-size: 0.95rem; line-height: 1.7; resize: vertical;
}
.input-area textarea:focus { outline: none; border-color: var(--accent); }
.input-area textarea::placeholder { color: var(--text-muted); }

/* Stats Grid */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px; margin: 24px 0;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; text-align: center;
}
.stat-card .value { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.stat-card .label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 4px; }

/* Sections */
.analysis-section {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin: 20px 0;
}
.analysis-section h3 {
  font-family: var(--font-display); font-size: 0.85rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 16px;
}

/* Readability */
.readability-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.readability-item { display: flex; flex-direction: column; gap: 6px; }
.readability-item .score { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; }
.readability-item .desc { font-size: 0.85rem; color: var(--text-muted); }
.score-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin-top: 4px; }
.score-bar-fill { height: 100%; border-radius: 3px; transition: width 0.4s; }

/* Word Frequency */
.freq-list { list-style: none; }
.freq-item { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.freq-word { font-family: var(--font-display); font-size: 0.85rem; min-width: 100px; text-align: right; }
.freq-bar { height: 20px; background: rgba(129,140,248,0.2); border-radius: 3px; transition: width 0.3s; display: flex; align-items: center; padding-left: 8px; }
.freq-count { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-display); }

/* Sentence distribution */
.dist-row { display: flex; gap: 16px; margin-bottom: 12px; flex-wrap: wrap; }
.dist-item { display: flex; align-items: center; gap: 8px; }
.dist-dot { width: 10px; height: 10px; border-radius: 50%; }
.dist-label { font-size: 0.85rem; color: var(--text-muted); }
.dist-pct { font-family: var(--font-display); font-weight: 700; font-size: 0.9rem; }

/* Tone */
.tone-meter { display: flex; align-items: center; gap: 16px; margin: 10px 0; }
.tone-bar-track { flex: 1; height: 8px; background: var(--border); border-radius: 4px; position: relative; }
.tone-bar-indicator { width: 16px; height: 16px; background: var(--accent); border-radius: 50%; position: absolute; top: -4px; transition: left 0.4s; }
.tone-label { font-size: 0.85rem; color: var(--text-muted); min-width: 60px; }

/* Suggestions */
.suggestions-list { list-style: none; }
.suggestions-list li {
  padding: 10px 14px; margin-bottom: 8px; background: var(--bg);
  border-left: 3px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.9rem; color: var(--text-muted);
}
.suggestions-list .type { font-weight: 600; color: var(--accent); font-size: 0.8rem; text-transform: uppercase; margin-bottom: 2px; }

footer { border-top: 1px solid var(--border); padding: 40px 0; margin-top: 60px; color: var(--text-muted); font-size: 0.85rem; }
footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

.blog-list { list-style: none; }
.blog-list li { border-bottom: 1px solid var(--border); padding: 20px 0; }
.blog-list h3 { margin-bottom: 6px; }
.blog-list h3 a { color: var(--text); }
.blog-list h3 a:hover { color: var(--accent); }
.blog-list .meta { color: var(--text-muted); font-size: 0.85rem; }

.blog-post { max-width: 760px; margin: 0 auto; padding: 40px 20px; }
.blog-post h1 { font-family: var(--font-display); font-size: 1.8rem; margin-bottom: 8px; }
.blog-post .meta { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 32px; }
.blog-post h2 { font-size: 1.3rem; margin: 32px 0 12px; color: var(--accent); }
.blog-post h3 { font-size: 1.1rem; margin: 24px 0 8px; }
.blog-post p { color: var(--text-muted); margin-bottom: 16px; line-height: 1.7; }
.blog-post ul, .blog-post ol { color: var(--text-muted); margin: 0 0 16px 24px; }
.blog-post li { margin-bottom: 6px; }
.blog-post pre { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; overflow-x: auto; font-family: var(--font-display); font-size: 0.85rem; margin-bottom: 16px; color: var(--text-muted); }
.blog-post code { font-family: var(--font-display); background: var(--bg-card); padding: 2px 6px; border-radius: 3px; font-size: 0.9em; }

.about-content { max-width: 760px; margin: 0 auto; padding: 40px 20px; }
.about-content h1 { font-family: var(--font-display); font-size: 1.8rem; margin-bottom: 20px; }
.about-content h1 span { color: var(--accent); }
.about-content p { color: var(--text-muted); margin-bottom: 16px; line-height: 1.7; }
.about-content h2 { font-size: 1.2rem; margin: 28px 0 12px; color: var(--accent); }
.about-content ul { color: var(--text-muted); margin: 0 0 16px 24px; }
.about-content li { margin-bottom: 6px; }

/* Mode Tabs */
.mode-tabs {
  display: flex;
  gap: 0;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  width: fit-content;
}
.mode-tab {
  padding: 0.6rem 1.5rem;
  background: var(--bg-card);
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.mode-tab:not(:last-child) { border-right: 1px solid var(--border); }
.mode-tab.active {
  background: rgba(129,140,248,0.15);
  color: var(--accent);
}

/* SEO Analysis */
.seo-keyword-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.seo-keyword-row label {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  font-weight: 600;
}
.seo-keyword-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.seo-keyword-input:focus { outline: none; border-color: var(--accent); }

/* Side-by-Side Compare */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.compare-col { display: flex; flex-direction: column; }
.compare-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 12px 0;
}
.compare-table th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.compare-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid rgba(34,34,34,0.5);
}
.compare-verdict {
  text-align: center;
  font-size: 1rem;
  margin-top: 16px;
  color: var(--text-muted);
}

/* FAQ Section */
.faq-section {
  margin: 40px 0 0;
}
.faq-section h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 20px;
  text-align: center;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
.faq-item:first-of-type { border-top: 1px solid var(--border); }
.faq-q {
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-q::after { content: '+'; color: var(--accent); font-size: 1.2rem; }
.faq-item.open .faq-q::after { content: '\2212'; }
.faq-a {
  display: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  padding-top: 8px;
  line-height: 1.6;
}
.faq-item.open .faq-a { display: block; }

@media (max-width: 768px) {
  .hero h1 { font-size: 1.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .readability-grid { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  nav { gap: 16px; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
}