/* ── TOKENS ─────────────────────────────────────── */
:root {
  --bg:         #0A0A0F;
  --bg2:        #111118;
  --bg3:        #1A1A24;
  --border:     #2A2A38;
  --accent:     #7B61FF;
  --accent2:    #A78BFA;
  --green:      #34D399;
  --text:       #E8E8F0;
  --muted:      #7070A0;
  --font-disp:  'Syne', sans-serif;
  --font-body:  'Inter', sans-serif;
  --font-mono:  'JetBrains Mono', monospace;
}

/* ── RESET ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── NAV ─────────────────────────────────────────── */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}
.nav-logo {
  font-family: var(--font-disp);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.nav-tag {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.accent { color: var(--accent); }

/* ── HERO ─────────────────────────────────────────── */
.hero {
  max-width: 860px;
  margin: 0 auto;
  padding: 100px 24px 80px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(123,97,255,0.1);
  border: 1px solid rgba(123,97,255,0.25);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}
.hero-title {
  font-family: var(--font-disp);
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 24px;
}
.accent-underline {
  position: relative;
  display: inline-block;
  color: var(--accent2);
}
.accent-underline::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  opacity: 0.6;
}
.hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 40px;
  font-weight: 300;
  line-height: 1.7;
}
.hero-cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 16px;
  padding: 14px 36px;
  border-radius: 8px;
  letter-spacing: 0.02em;
  transition: background 0.2s, transform 0.2s;
}
.hero-cta:hover { background: var(--accent2); transform: translateY(-2px); }

/* ── HOW IT WORKS ─────────────────────────────────── */
.how {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  padding: 40px 24px;
}
.how-grid {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.how-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.step-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  font-weight: 500;
  padding-top: 3px;
  min-width: 24px;
}
.step-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.step-text strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.step-text span {
  font-size: 13px;
  color: var(--muted);
}
.how-divider {
  color: var(--border);
  font-size: 20px;
  font-weight: 300;
}

/* ── GENERATOR ─────────────────────────────────────── */
.generator {
  max-width: 780px;
  margin: 0 auto;
  padding: 72px 24px 80px;
}
.gen-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.gen-header {
  padding: 32px 36px 24px;
  border-bottom: 1px solid var(--border);
}
.gen-header h2 {
  font-family: var(--font-disp);
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 4px;
}
.gen-header p {
  font-size: 14px;
  color: var(--muted);
}
.gen-body {
  padding: 28px 36px 36px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* TEXTAREA */
.input-wrap { position: relative; }
.idea-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  padding: 16px 18px;
  resize: none;
  transition: border-color 0.2s;
  outline: none;
}
.idea-input:focus { border-color: var(--accent); }
.idea-input::placeholder { color: var(--muted); }
.char-count {
  position: absolute;
  bottom: 10px;
  right: 14px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--muted);
}

/* TYPE SELECTOR */
.type-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.type-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 12px;
  transition: border-color 0.2s, background 0.2s;
  text-align: center;
}
.type-btn:hover { border-color: var(--accent2); }
.type-btn.active {
  border-color: var(--accent);
  background: rgba(123,97,255,0.08);
}
.type-icon { font-size: 20px; }
.type-label {
  font-family: var(--font-disp);
  font-size: 13px;
  font-weight: 700;
}
.type-desc {
  font-size: 11px;
  color: var(--muted);
}

/* GENERATE BUTTON */
.gen-btn {
  background: var(--accent);
  border: none;
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  font-family: var(--font-disp);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 16px;
  transition: background 0.2s, transform 0.15s;
  width: 100%;
}
.gen-btn:hover { background: var(--accent2); transform: translateY(-1px); }
.gen-btn:active { transform: translateY(0); }
.gen-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* OUTPUT */
.output-wrap {
  margin-top: 24px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
}
.output-label {
  font-family: var(--font-disp);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent2);
}
.copy-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 5px 12px;
  transition: color 0.2s, border-color 0.2s;
}
.copy-btn:hover { color: var(--green); border-color: var(--green); }
.output-body {
  padding: 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  color: #C8C8E0;
  white-space: pre-wrap;
  max-height: 520px;
  overflow-y: auto;
}
.output-body::-webkit-scrollbar { width: 6px; }
.output-body::-webkit-scrollbar-track { background: var(--bg2); }
.output-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ERROR */
.error-wrap {
  margin-top: 16px;
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: 10px;
  color: #FCA5A5;
  font-size: 14px;
  padding: 14px 18px;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
.footer-inner { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.footer-logo {
  font-family: var(--font-disp);
  font-size: 18px;
  font-weight: 800;
}
.footer-note { font-size: 13px; color: var(--muted); }
.footer-credit { font-size: 11px; color: #404060; font-family: var(--font-mono); }

/* UTILS */
.hidden { display: none !important; }

/* LOADING DOTS */
@keyframes dots {
  0%, 20%  { content: 'Thinking.'; }
  40%      { content: 'Thinking..'; }
  60%,100% { content: 'Thinking...'; }
}
#btnLoader::after { animation: dots 1.2s infinite; content: ''; }

/* RESPONSIVE */
@media (max-width: 600px) {
  .nav { padding: 16px 20px; }
  .hero { padding: 60px 20px 48px; }
  .gen-header { padding: 24px 20px 20px; }
  .gen-body { padding: 20px 20px 28px; }
  .type-selector { grid-template-columns: 1fr; }
  .how-divider { display: none; }
  .output-body { padding: 20px; font-size: 12px; }
}

/* ── LAYOUT (with sidebar) ──────────────────────────── */
.layout {
  display: flex;
  min-height: calc(100vh - 64px);
  max-width: 1200px;
  margin: 0 auto;
}

/* ── SIDEBAR ────────────────────────────────────────── */
.sidebar {
  width: 280px;
  min-width: 280px;
  border-right: 1px solid var(--border);
  background: var(--bg2);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow: hidden;
}
.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 20px 14px;
  border-bottom: 1px solid var(--border);
}
.sidebar-title {
  font-family: var(--font-disp);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}
.refresh-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 18px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.2s;
}
.refresh-btn:hover { color: var(--accent2); }
.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.history-list::-webkit-scrollbar { width: 4px; }
.history-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.history-empty {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  padding: 32px 16px;
  line-height: 1.6;
}
.history-item {
  position: relative;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 36px 12px 12px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.history-item:hover {
  border-color: var(--accent);
  background: rgba(123,97,255,0.06);
}
.history-idea {
  font-size: 12px;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 6px;
}
.history-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
  font-family: var(--font-mono);
}
.history-delete {
  position: absolute;
  top: 10px;
  right: 10px;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
  padding: 2px 5px;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}
.history-delete:hover { color: #FCA5A5; background: rgba(239,68,68,0.1); }

/* ── MAIN ───────────────────────────────────────────── */
.main {
  flex: 1;
  overflow-y: auto;
  padding: 0 0 60px;
}
.hero {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 32px 40px;
  text-align: center;
}
.hero-title {
  font-family: var(--font-disp);
  font-size: clamp(36px, 5vw, 62px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -2px;
  margin-bottom: 16px;
}
.generator {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 32px 60px;
}

/* ── RESPONSIVE (collapse sidebar on mobile) ─────────── */
@media (max-width: 768px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%;
    min-width: unset;
    position: static;
    height: auto;
    max-height: 220px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .hero { padding: 40px 20px 24px; }
  .generator { padding: 0 20px 48px; }
}