@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap");

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

:root {
  --bg: #07070f;
  --surface: #0f0f1a;
  --surface2: #16162a;
  --border: rgba(255, 255, 255, 0.07);
  --accent1: #7c6bff;
  --accent2: #00d4ff;
  --accent3: #ff6b9d;
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --success: #00e5a0;
  --warning: #ffb347;
  --radius: 14px;
  --radius-lg: 22px;
  --glow: 0 0 40px rgba(124, 107, 255, 0.18);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Lock body scroll whenever any modal is open */
.modal-open { overflow: hidden !important; }

a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(124, 107, 255, 0.2);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(124, 107, 255, 0.45);
}

/* ── Noise overlay ── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ── Gradient orbs ── */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}
.orb-1 {
  width: 600px;
  height: 600px;
  background: rgba(124, 107, 255, 0.12);
  top: -200px;
  left: -100px;
}
.orb-2 {
  width: 500px;
  height: 500px;
  background: rgba(0, 212, 255, 0.08);
  bottom: -150px;
  right: -100px;
}
.orb-3 {
  width: 400px;
  height: 400px;
  background: rgba(255, 107, 157, 0.07);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 7, 15, 0.7);
  backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  padding: 0 clamp(1rem, 5vw, 3rem);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.nav-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.4rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
}
.nav-btn:hover,
.nav-btn.active {
  background: rgba(124, 107, 255, 0.15);
  border-color: var(--accent1);
  color: var(--text);
}
.nav-btn.primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  border-color: transparent;
  color: #fff;
}
.nav-btn.primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* ── Hero ── */
.hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: clamp(4rem, 10vw, 8rem) clamp(1rem, 5vw, 3rem) clamp(2rem, 5vw, 4rem);
}
.hero-pi {
  font-size: clamp(5rem, 18vw, 14rem);
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(
    135deg,
    var(--accent1) 0%,
    var(--accent2) 50%,
    var(--accent3) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: floatPi 6s ease-in-out infinite;
  display: block;
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 60px rgba(124, 107, 255, 0.4));
}
@keyframes floatPi {
  0%,
  100% {
    transform: translateY(0) rotate(-2deg);
  }
  50% {
    transform: translateY(-12px) rotate(2deg);
  }
}
.hero h1 {
  font-size: clamp(1.5rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 0.75rem;
}
.hero h1 span {
  color: var(--text-muted);
  font-weight: 400;
}
.hero-desc {
  color: var(--text-muted);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  max-width: 560px;
  margin: 0 auto 2rem;
}
.hero-stats {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.hero-stat {
  text-align: center;
}
.hero-stat .num {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stat .lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Section ── */
.section {
  position: relative;
  z-index: 1;
  padding: 0 clamp(1rem, 5vw, 3rem) clamp(3rem, 6vw, 5rem);
  max-width: 1400px;
  margin: 0 auto;
}
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.section-title {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.section-title .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  display: inline-block;
}
.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.filter-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.3rem 0.9rem;
  border-radius: 99px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}
.filter-chip:hover,
.filter-chip.active {
  background: rgba(124, 107, 255, 0.18);
  border-color: var(--accent1);
  color: var(--text);
}

/* ── Cards Grid ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  cursor: pointer;
  transition:
    transform 0.25s,
    border-color 0.25s,
    box-shadow 0.25s;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124, 107, 255, 0.06), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 107, 255, 0.4);
  box-shadow: var(--glow);
}
.card:hover::before {
  opacity: 1;
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 107, 255, 0.3);
}
.card-icon.custom {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  box-shadow: 0 4px 16px rgba(124,107,255,0.3);
}
.card-badge {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.2rem 0.55rem;
  white-space: nowrap;
}
.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.25rem;
}
.card-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.card-tag {
  font-size: 0.7rem;
  font-weight: 500;
  background: rgba(124, 107, 255, 0.1);
  border: 1px solid rgba(124, 107, 255, 0.2);
  color: var(--accent1);
  border-radius: 6px;
  padding: 0.15rem 0.45rem;
}
.card-arrow {
  color: var(--accent1);
  font-size: 1rem;
  transition: transform 0.2s;
}
.card:hover .card-arrow {
  transform: translateX(4px);
}
.card.custom-card .card-tag {
  background: rgba(124,107,255,0.1); border-color: rgba(124,107,255,0.2);
  color: var(--accent1);
}

/* ── Empty state ── */
.empty-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}
.empty-state .emoji {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

/* ── Pi value display ── */
.pi-value-banner {
  position: relative;
  z-index: 1;
  margin: 0 clamp(1rem, 5vw, 3rem) 3rem;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  overflow: hidden;
}
.pi-value-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(124, 107, 255, 0.08), transparent);
}
.pi-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  white-space: nowrap;
}
.pi-digits {
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  color: var(--accent2);
  word-break: break-all;
  position: relative;
}

/* ── Add Method Form (modal) ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 720px;
  max-height: 92vh;
  overflow-y: auto;
  padding: 2rem;
  transform: translateY(24px);
  transition: transform 0.3s;
  position: relative;
}
.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}
.modal-close {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 9px;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.modal-close:hover {
  background: rgba(255, 100, 100, 0.12);
  border-color: rgba(255, 100, 100, 0.3);
  color: #ff6b6b;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}
label span {
  color: var(--accent3);
}
input,
textarea,
select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.65rem 0.9rem;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
  width: 100%;
  outline: none;
}
input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent1);
  box-shadow: 0 0 0 3px rgba(124, 107, 255, 0.15);
}
textarea {
  resize: vertical;
  min-height: 90px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
}
textarea.formula-input {
  min-height: 60px;
}

.form-hint {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}
.form-hint code {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  color: var(--accent2);
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}
.btn {
  padding: 0.65rem 1.4rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  transition: all 0.2s;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--text);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 107, 255, 0.3);
}
.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}
.btn-danger {
  background: rgba(255, 80, 80, 0.12);
  border: 1px solid rgba(255, 80, 80, 0.25);
  color: #ff6b6b;
}
.btn-danger:hover {
  background: rgba(255, 80, 80, 0.2);
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 300;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  min-width: 240px;
}
.toast.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.toast-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}
.toast-msg {
  font-size: 0.88rem;
  font-weight: 500;
}

/* ── Footer ── */
.site-footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  margin-top: 5rem;
  background: linear-gradient(180deg, transparent, rgba(10,8,26,0.8));
}
.footer-inner {
  max-width: 1400px; margin: 0 auto;
  padding: 3.5rem clamp(1rem,5vw,3rem) 2.5rem;
  display: flex; gap: 3rem; flex-wrap: wrap;
}
.footer-brand { flex: 1; min-width: 220px; }
.footer-logo {
  font-size: 1.4rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  display: inline-block; margin-bottom: 0.75rem;
}
.footer-tagline {
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.6;
  max-width: 280px; margin-bottom: 1.25rem;
}
.footer-badges { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.footer-badge {
  font-size: 0.72rem; font-weight: 500;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: 7px; padding: 0.25rem 0.65rem;
}
.footer-links {
  display: flex; gap: 3rem; flex-wrap: wrap;
}
.footer-col {
  display: flex; flex-direction: column; gap: 0.55rem; min-width: 140px;
}
.footer-col-title {
  font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-muted); margin-bottom: 0.3rem;
}
.footer-col a {
  font-size: 0.85rem; color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent2); }
.footer-info-item {
  font-size: 0.85rem; color: rgba(255,255,255,0.35);
}
.footer-admin-link {
  font-size: 0.78rem !important;
  color: rgba(255,255,255,0.2) !important;
  margin-top: 0.5rem;
  transition: color 0.2s !important;
}
.footer-admin-link:hover { color: var(--accent1) !important; }

.footer-bottom {
  max-width: 1400px; margin: 0 auto;
  padding: 1.25rem clamp(1rem,5vw,3rem);
  border-top: 1px solid rgba(255,255,255,0.05);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 0.75rem;
  font-size: 0.78rem; color: var(--text-muted);
}
.footer-pi-seq {
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.15em; color: rgba(124,107,255,0.4);
  font-size: 0.75rem;
}
@media (max-width: 600px) {
  .footer-inner { flex-direction: column; gap: 2rem; }
  .footer-bottom { justify-content: center; text-align: center; }
}

/* ── Detail page ── */
.detail-hero {
  position: relative;
  z-index: 1;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 5vw, 3rem) 2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.45rem 1rem;
  border-radius: 9px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
  margin-bottom: 2rem;
}
.back-btn:hover {
  border-color: var(--accent1);
  color: var(--text);
  transform: translateX(-3px);
}
.detail-origin {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent1);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.detail-title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 0.75rem;
}
.detail-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 650px;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.detail-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.detail-tag {
  font-size: 0.78rem;
  font-weight: 500;
  background: rgba(124, 107, 255, 0.1);
  border: 1px solid rgba(124, 107, 255, 0.2);
  color: var(--accent1);
  border-radius: 7px;
  padding: 0.2rem 0.6rem;
}

.detail-body {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 3rem) 4rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.panel-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.panel-title .icon {
  font-size: 1rem;
}
.panel-body {
  padding: 1.5rem;
}

/* Formula */
.formula-display {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-x: auto;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
}
.formula-display .katex {
  color: var(--text);
}

/* Code */
.code-wrap {
  position: relative;
}
.copy-code-btn {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.3rem 0.75rem;
  border-radius: 7px;
  font-size: 0.77rem;
  font-weight: 500;
  transition: all 0.2s;
  flex-shrink: 0;
}
.copy-code-btn:hover {
  border-color: var(--accent1);
  color: var(--text);
}
pre {
  margin: 0;
}
pre code.hljs {
  background: rgba(0, 0, 0, 0.3) !important;
  border-radius: 0 !important;
  font-family: "JetBrains Mono", monospace !important;
  font-size: 0.83rem !important;
  padding: 1.5rem !important;
  line-height: 1.65 !important;
}

/* Output terminal */
.terminal {
  background: #0a0f0a;
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.83rem;
  line-height: 1.65;
}
.terminal .prompt {
  color: #5af542;
}
.terminal .output {
  color: #c8f7c5;
  white-space: pre-wrap;
}
.terminal .value-row {
  color: var(--accent2);
}
.terminal .error-row {
  color: var(--accent3);
}
.terminal .pi-real {
  color: var(--success);
}

/* Comparison table */
.cmp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.cmp-table th {
  text-align: left;
  padding: 0.6rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: 0.77rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}
.cmp-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
}
.cmp-table tr:last-child td {
  border-bottom: none;
}
.cmp-table .mono {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
}
.cmp-table .badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-great {
  background: rgba(0, 229, 160, 0.12);
  color: var(--success);
  border: 1px solid rgba(0, 229, 160, 0.2);
}
.badge-good {
  background: rgba(0, 212, 255, 0.12);
  color: var(--accent2);
  border: 1px solid rgba(0, 212, 255, 0.2);
}
.badge-ok {
  background: rgba(255, 179, 71, 0.12);
  color: var(--warning);
  border: 1px solid rgba(255, 179, 71, 0.2);
}
.badge-slow {
  background: rgba(255, 107, 157, 0.12);
  color: var(--accent3);
  border: 1px solid rgba(255, 107, 157, 0.2);
}

/* Iter control */
.iter-control {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.iter-control label {
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.iter-control input[type="range"] {
  flex: 1;
  min-width: 140px;
  height: 4px;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 99px;
  border: none;
  padding: 0;
}
.iter-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(124, 107, 255, 0.4);
}
.iter-control input[type="range"]:focus {
  box-shadow: none;
}
.iter-val {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent2);
  min-width: 80px;
  text-align: right;
  white-space: nowrap;
}
.run-btn {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  border: none;
  color: #fff;
  padding: 0.5rem 1.25rem;
  border-radius: 9px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(124, 107, 255, 0.35);
  transition: all 0.2s;
}
.run-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* Chart */
#convergence-chart {
  max-height: 320px;
}

/* Error badge (live) */
.live-error {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  background: rgba(0, 229, 160, 0.1);
  border: 1px solid rgba(0, 229, 160, 0.2);
  color: var(--success);
  border-radius: 7px;
  padding: 0.2rem 0.6rem;
  white-space: nowrap;
}

/* Manage custom modal */
.custom-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1rem;
}
.custom-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 1rem;
}
.custom-item-name {
  font-weight: 600;
  font-size: 0.9rem;
}
.custom-item-year {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.custom-item-actions {
  display: flex;
  gap: 0.5rem;
}
.icon-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all 0.2s;
}
.icon-btn.del:hover {
  background: rgba(255, 80, 80, 0.15);
  border-color: rgba(255, 80, 80, 0.3);
  color: #ff6b6b;
}
.icon-btn.edit:hover {
  background: rgba(124, 107, 255, 0.15);
  border-color: var(--accent1);
  color: var(--accent1);
}

/* Export/import row */
.io-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
}

/* Responsive */
@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  .iter-control {
    flex-direction: column;
    align-items: stretch;
  }
  .nav-links .nav-btn:not(.primary) {
    display: none;
  }
}