/* ============================================================
   CIRCUIT THEME — tech terminal dark aesthetic
   ============================================================ */

/* 1. Color tokens */
[data-theme="circuit"], :root[data-theme="circuit"] {
  --bg:           #050a0c;
  --surface:      #0a1416;
  --surface-2:    #0f1c1f;
  --surface-3:    #142528;
  --border:       #1a2d31;
  --border-soft:  #122024;
  --border-glow:  rgba(20, 184, 166, 0.25);
  --text:         #d1f5f0;
  --muted:        #5f7d80;
  --subtle:       #3d5558;
  --text-dim:     #2a3d40;
  --primary:      #14b8a6;
  --primary-light:#2dd4bf;
  --primary-glow: rgba(20, 184, 166, 0.5);
  --accent:       #06d6a0;
  --accent-2:     #67e8f9;
  --magenta:      #c026d3;
  --magenta-glow: rgba(192, 38, 211, 0.4);
  --green:        #10b981;
  --green-soft:   rgba(16, 185, 129, 0.12);
  --red:          #ef4444;
  --red-soft:     rgba(239, 68, 68, 0.12);
  --yellow:       #fbbf24;
  --yellow-soft:  rgba(251, 191, 36, 0.10);
  --shadow-sm:    0 1px 2px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(20, 184, 166, 0.05);
  --shadow-md:    0 4px 12px rgba(0, 0, 0, 0.55), 0 0 24px rgba(20, 184, 166, 0.06);
  --shadow-lg:    0 14px 40px rgba(0, 0, 0, 0.7), 0 0 48px rgba(20, 184, 166, 0.10);
  --shadow-glow:  0 0 20px rgba(20, 184, 166, 0.35);
  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;
  --sidebar-bg:           #020607;
  --sidebar-bg-2:         #050d0f;
  --sidebar-text:         #4a6669;
  --sidebar-text-active:  #67e8f9;
  --sidebar-active-bg:    rgba(20, 184, 166, 0.10);
  --sidebar-hover-bg:     rgba(20, 184, 166, 0.04);
  --sidebar-accent:       #14b8a6;
  --sidebar-glow:         #67e8f9;
  --sidebar-glow-shadow:  rgba(103,232,249,0.5);
  --sidebar-border:       rgba(20, 184, 166, 0.10);
}

/* 2. Circuit board background */
body[data-theme="circuit"] {
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 20% 30%, rgba(20, 184, 166, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(192, 38, 211, 0.03) 0%, transparent 40%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'><g fill='none' stroke='%23104a4d' stroke-width='0.5' opacity='0.4'><path d='M0 40 L60 40 L60 0 M40 200 L40 140 L100 140 L100 200 M200 60 L140 60 L140 100 L200 100 M0 160 L60 160 L60 120 L120 120'/><circle cx='60' cy='40' r='2' fill='%2314b8a6' opacity='0.5'/><circle cx='40' cy='140' r='2' fill='%2314b8a6' opacity='0.4'/><circle cx='140' cy='60' r='2' fill='%2314b8a6' opacity='0.4'/><circle cx='60' cy='120' r='2' fill='%2314b8a6' opacity='0.3'/></g></svg>");
  background-size: auto, auto, 200px 200px;
  background-attachment: fixed;
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display', system-ui, sans-serif;
  letter-spacing: -0.005em;
}

body[data-theme="circuit"] aside {
  background-color: var(--sidebar-bg);
  background-image:
    linear-gradient(180deg, transparent 0%, rgba(20, 184, 166, 0.02) 50%, transparent 100%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 200'><g fill='none' stroke='%2314b8a6' stroke-width='0.4' opacity='0.18'><path d='M0 20 L40 20 L40 60 M40 100 L80 100 L80 140 M20 160 L20 200'/><circle cx='40' cy='20' r='1.5' fill='%2314b8a6'/><circle cx='40' cy='60' r='1' fill='%2367e8f9'/><circle cx='80' cy='100' r='1.5' fill='%2314b8a6'/></g></svg>");
  background-size: auto, 80px 200px;
  border-right: 1px solid var(--sidebar-border);
}

/* 3. Typography */
body[data-theme="circuit"] code,
body[data-theme="circuit"] .mono,
body[data-theme="circuit"] .stat .v,
body[data-theme="circuit"] .kbd,
body[data-theme="circuit"] input[type="number"],
body[data-theme="circuit"] th,
body[data-theme="circuit"] .stat-grid .v {
  font-family: 'JetBrains Mono', 'IBM Plex Mono', 'SF Mono', 'Menlo', 'Roboto Mono', ui-monospace, monospace;
  font-feature-settings: "tnum" 1, "zero" 1;
  letter-spacing: 0.02em;
}
body[data-theme="circuit"] h1,
body[data-theme="circuit"] h2,
body[data-theme="circuit"] h3,
body[data-theme="circuit"] h4 { letter-spacing: -0.015em; font-weight: 700; }
body[data-theme="circuit"] h2 {
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}
body[data-theme="circuit"] label {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 600;
}

/* 4. Cards */
body[data-theme="circuit"] .card {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s, transform .15s;
}
body[data-theme="circuit"] .card::before {
  content: '';
  position: absolute;
  top: 0; left: 16px; right: 16px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
  transition: opacity .3s;
}
body[data-theme="circuit"] .card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-md), 0 0 0 1px rgba(20, 184, 166, 0.10); }
body[data-theme="circuit"] .card:hover::before { opacity: 1; }
body[data-theme="circuit"] .card.highlight,
body[data-theme="circuit"] .card.terminal { border-color: var(--accent); box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(20, 184, 166, 0.15); }
body[data-theme="circuit"] .card.terminal::after {
  content: '';
  position: absolute;
  inset: 8px;
  pointer-events: none;
  background:
    linear-gradient(to right, var(--accent) 12px, transparent 12px) top left / 12px 1px no-repeat,
    linear-gradient(to bottom, var(--accent) 12px, transparent 12px) top left / 1px 12px no-repeat,
    linear-gradient(to left, var(--accent) 12px, transparent 12px) top right / 12px 1px no-repeat,
    linear-gradient(to bottom, var(--accent) 12px, transparent 12px) top right / 1px 12px no-repeat,
    linear-gradient(to right, var(--accent) 12px, transparent 12px) bottom left / 12px 1px no-repeat,
    linear-gradient(to top, var(--accent) 12px, transparent 12px) bottom left / 1px 12px no-repeat,
    linear-gradient(to left, var(--accent) 12px, transparent 12px) bottom right / 12px 1px no-repeat,
    linear-gradient(to top, var(--accent) 12px, transparent 12px) bottom right / 1px 12px no-repeat;
}

/* 5. Buttons */
body[data-theme="circuit"] button {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #021216;
  border: 1px solid var(--accent);
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  position: relative;
  transition: all .15s;
  box-shadow: 0 0 0 0 transparent;
  overflow: hidden;
}
body[data-theme="circuit"] button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--primary-glow), inset 0 0 0 1px rgba(255,255,255,0.1);
  background: linear-gradient(135deg, var(--primary-light), #5eead4);
}
body[data-theme="circuit"] button:active { transform: translateY(0); box-shadow: 0 0 12px var(--primary-glow); }
body[data-theme="circuit"] button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform .5s;
  pointer-events: none;
}
body[data-theme="circuit"] button:hover::after { transform: translateX(100%); }
body[data-theme="circuit"] button.sec {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
  text-transform: none;
  letter-spacing: normal;
}
body[data-theme="circuit"] button.sec:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px rgba(20, 184, 166, 0.20);
  background: rgba(20, 184, 166, 0.05);
}
body[data-theme="circuit"] button.ghost {
  background: transparent;
  color: var(--muted);
  border: 0;
  box-shadow: none;
  text-transform: none;
  letter-spacing: normal;
}
body[data-theme="circuit"] button.danger {
  background: linear-gradient(135deg, #b91c1c, var(--red));
  border-color: var(--red);
  color: #fff;
}
body[data-theme="circuit"] .icon-btn {
  background: rgba(20, 184, 166, 0.06);
  border: 1px solid var(--border);
  color: var(--sidebar-text);
  text-transform: none;
  letter-spacing: normal;
  padding: 0;
  font-size: inherit;
}
body[data-theme="circuit"] .icon-btn:hover {
  background: rgba(20, 184, 166, 0.12);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  box-shadow: none;
}
body[data-theme="circuit"] .seg-control button,
body[data-theme="circuit"] .tab {
  background: transparent;
  border: 0;
  box-shadow: none;
  text-transform: none;
  letter-spacing: normal;
  padding: 7px 10px;
  font-size: 12px;
}
body[data-theme="circuit"] .seg-control button:hover,
body[data-theme="circuit"] .tab:hover { transform: none; box-shadow: none; }
body[data-theme="circuit"] .mobile-header .lang-switch button {
  background: transparent;
  border: 0;
  box-shadow: none;
  text-transform: none;
  letter-spacing: .5px;
  padding: 5px 10px;
  font-size: 11px;
}
body[data-theme="circuit"] .mobile-header .lang-switch button:hover { transform: none; box-shadow: none; }

/* 6. Inputs */
body[data-theme="circuit"] input[type=text],
body[data-theme="circuit"] input[type=number],
body[data-theme="circuit"] input[type=date],
body[data-theme="circuit"] input[type=password],
body[data-theme="circuit"] input[type=file],
body[data-theme="circuit"] textarea,
body[data-theme="circuit"] select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
body[data-theme="circuit"] input:focus,
body[data-theme="circuit"] textarea:focus,
body[data-theme="circuit"] select:focus {
  outline: 0;
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15), inset 0 0 0 1px rgba(20, 184, 166, 0.1);
}
body[data-theme="circuit"] input::placeholder { color: var(--text-dim); }

/* 7. Stats */
body[data-theme="circuit"] .stat {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 12px;
  position: relative;
  overflow: hidden;
}
body[data-theme="circuit"] .stat::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.5;
}
body[data-theme="circuit"] .stat .v {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
  text-shadow: 0 0 16px rgba(20, 184, 166, 0.25);
  line-height: 1;
}
body[data-theme="circuit"] .stat .l {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1.8px;
  font-weight: 600;
  margin-top: 8px;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
}
body[data-theme="circuit"] .stat:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4), 0 0 24px rgba(20, 184, 166, 0.12);
}
body[data-theme="circuit"] .stat.positive .v { color: var(--green); text-shadow: 0 0 16px rgba(16, 185, 129, 0.3); }
body[data-theme="circuit"] .stat.negative .v { color: var(--red); text-shadow: 0 0 16px rgba(239, 68, 68, 0.3); }

/* 8. Sidebar */
body[data-theme="circuit"] .brand-text h1 { color: var(--text); font-weight: 700; }
body[data-theme="circuit"] .brand-text .sub {
  color: var(--sidebar-accent);
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  letter-spacing: 2px;
}
body[data-theme="circuit"] nav .group {
  color: var(--sidebar-accent);
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  letter-spacing: 2px;
  opacity: 0.5;
  font-size: 9px;
}
body[data-theme="circuit"] nav a {
  color: var(--sidebar-text);
  border-left: 2px solid transparent;
  transition: all .12s;
}
body[data-theme="circuit"] nav a:hover { color: var(--text); background: var(--sidebar-hover-bg); }
body[data-theme="circuit"] nav a.active {
  color: var(--sidebar-text-active);
  background: var(--sidebar-active-bg);
  border-left-color: var(--accent);
  font-weight: 600;
  text-shadow: 0 0 8px rgba(103, 232, 249, 0.4);
  position: relative;
}
body[data-theme="circuit"] nav a.active::after {
  content: '';
  position: absolute;
  right: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: circuit-pulse 2s ease-in-out infinite;
}
@keyframes circuit-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--accent); }
  50% { opacity: 0.4; box-shadow: 0 0 12px var(--accent); }
}

/* 9. Tables */
body[data-theme="circuit"] table { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
body[data-theme="circuit"] th {
  background: var(--surface-2);
  color: var(--accent);
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: 10px;
  font-weight: 700;
  border-bottom: 1px solid var(--accent);
  padding: 12px 14px;
}
body[data-theme="circuit"] td { font-size: 13px; border-top: 1px solid var(--border-soft); }
body[data-theme="circuit"] td.num,
body[data-theme="circuit"] td[data-type="number"] { font-family: 'JetBrains Mono', 'SF Mono', monospace; text-align: right; }
body[data-theme="circuit"] tr:hover td { background: rgba(20, 184, 166, 0.04); }

/* 10. Pills, badges, blockquote */
body[data-theme="circuit"] .pill {
  background: rgba(20, 184, 166, 0.08);
  color: var(--accent);
  border: 1px solid rgba(20, 184, 166, 0.20);
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}
body[data-theme="circuit"] .pill.primary {
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  color: #021216;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(20, 184, 166, 0.3);
}
body[data-theme="circuit"] .badge.win { background: var(--green-soft); color: var(--green); border: 1px solid rgba(16, 185, 129, 0.25); }
body[data-theme="circuit"] .badge.loss { background: var(--red-soft); color: var(--red); border: 1px solid rgba(239, 68, 68, 0.25); }
body[data-theme="circuit"] blockquote {
  border-left: 3px solid var(--magenta);
  background: linear-gradient(90deg, rgba(192, 38, 211, 0.05), transparent);
  color: var(--text);
  font-style: normal;
  font-weight: 500;
}

/* 11. Login overlay */
body[data-theme="circuit"] .login-overlay::after { background: rgba(2,6,7,.52); }
body[data-theme="circuit"] .login-box {
  background: rgba(5,13,16,.82);
  border-color: rgba(20,184,166,.35);
  box-shadow: 0 30px 80px rgba(0,0,0,0.8), 0 0 40px rgba(20,184,166,.10), inset 0 0 30px rgba(20,184,166,.03);
}
body[data-theme="circuit"] .login-brand h1 {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
body[data-theme="circuit"] .login-brand .sub {
  color: var(--accent);
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  letter-spacing: 3px;
}
body[data-theme="circuit"] .login-box form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(20,184,166,.20);
}
body[data-theme="circuit"] .login-box form button {
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  color: #021216;
}

/* 12. Progress bars */
body[data-theme="circuit"] .progress {
  background: var(--surface-2);
  border: 1px solid var(--border);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}
body[data-theme="circuit"] .progress > div {
  background: linear-gradient(90deg, var(--accent), var(--primary-light));
  box-shadow: 0 0 12px rgba(20, 184, 166, 0.5);
  position: relative;
}
body[data-theme="circuit"] .progress > div::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: progress-scan 2s linear infinite;
}
@keyframes progress-scan {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* 14. Background particles */
body[data-theme="circuit"] .bg-particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
body[data-theme="circuit"] .bg-particles span {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  opacity: 0;
  animation: particle-float 12s linear infinite;
}
body[data-theme="circuit"] .bg-particles span:nth-child(1) { left: 10%; animation-delay: 0s; }
body[data-theme="circuit"] .bg-particles span:nth-child(2) { left: 30%; animation-delay: 3s; }
body[data-theme="circuit"] .bg-particles span:nth-child(3) { left: 55%; animation-delay: 5s; }
body[data-theme="circuit"] .bg-particles span:nth-child(4) { left: 75%; animation-delay: 7s; }
body[data-theme="circuit"] .bg-particles span:nth-child(5) { left: 90%; animation-delay: 9s; }
@keyframes particle-float {
  0% { top: 100%; opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.4; }
  100% { top: -5%; opacity: 0; }
}

/* 17. Mobile */
@media (max-width: 480px) {
  body[data-theme="circuit"] aside { background-size: auto, 60px 150px; }
}

/* Circuit theme overrides for sidebar controls (prevent aggressive button styling) */
body[data-theme="circuit"] .lang-btn {
  background: transparent;
  border: 0;
  box-shadow: none;
  text-transform: none;
  letter-spacing: 1.5px;
  font-size: 13px;
  padding: 6px 0;
  color: var(--sidebar-text);
}
body[data-theme="circuit"] .lang-btn::after { display: none; }
body[data-theme="circuit"] .lang-btn:hover { transform: none; box-shadow: none; color: #fff; }
body[data-theme="circuit"] .ls-step {
  background: transparent;
  border: 0;
  box-shadow: none;
  text-transform: none;
  letter-spacing: normal;
  font-size: 13px;
  padding: 8px 6px 8px 0;
  color: var(--sidebar-text);
}
body[data-theme="circuit"] .ls-step::after { display: none; }
body[data-theme="circuit"] .ls-step:hover { transform: none; box-shadow: none; background: rgba(255,255,255,.04); }

/* Circuit theme overrides for opt-btn (don't get circuit button styling) */
body[data-theme="circuit"] .opt-btn {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  text-transform: none;
  letter-spacing: normal;
  font-size: 13px;
  font-family: inherit;
}
body[data-theme="circuit"] .opt-btn::after { display: none; }
body[data-theme="circuit"] .opt-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

@media (max-width: 480px) {
  .theme-grid { grid-template-columns: repeat(3, 1fr); }
}