:root {
  color-scheme: dark;
  --font-ui: "Space Grotesk", "Rajdhani", "Aptos", "SF Pro Text", "Segoe UI Variable", system-ui, sans-serif;
  --font-display: "Orbitron", "Oxanium", "Space Grotesk", "Aptos Display", "SF Pro Display", system-ui, sans-serif;
  --font-compact: "Rajdhani", "Space Grotesk", "Aptos", "SF Pro Text", system-ui, sans-serif;
  --font-tech: "Oxanium", "Orbitron", "Rajdhani", "Aptos Display", "Segoe UI Variable Display", system-ui, sans-serif;
  --font-code: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --bg: #06172f;
  --surface: #0b2442;
  --surface-2: #123d66;
  --line: #315a83;
  --line-bright: #7dd3ff;
  --text: #eef3fb;
  --muted: #a8b3c4;
  --blue: #46c2ff;
  --cyan-soft: rgba(70, 194, 255, 0.16);
  --gold: #ffc857;
  --green: #73e3a4;
  --white: #f8fbff;
  --accent: #ff4fd8;
  --violet: #9f7bff;
  --panel-glow: 0 22px 80px rgba(0, 11, 36, 0.36);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(70, 194, 255, 0.07) 0 1px, transparent 1px 26px),
    radial-gradient(circle at 18% 12%, rgba(70, 194, 255, 0.15), transparent 28%),
    radial-gradient(circle at 82% 10%, rgba(255, 79, 216, 0.12), transparent 26%),
    radial-gradient(circle at 70% 82%, rgba(159, 123, 255, 0.12), transparent 34%),
    linear-gradient(180deg, #092755 0%, var(--bg) 46%, #041229 100%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-ui);
  font-feature-settings: "ss01" 1, "cv01" 1;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  margin: 12px auto 0;
  width: min(1460px, calc(100% - 24px));
  padding: 12px 14px;
  background:
    linear-gradient(90deg, rgba(6, 23, 47, 0.88), rgba(10, 39, 78, 0.82)),
    rgba(8, 31, 65, 0.82);
  border: 1px solid rgba(125, 211, 255, 0.38);
  border-radius: 12px;
  box-shadow: 0 20px 70px rgba(0, 11, 35, 0.34), inset 0 1px 0 rgba(248, 251, 255, 0.08);
  backdrop-filter: blur(18px);
}

.app-nav button,
.primary-action,
.secondary-action {
  font-family: var(--font-tech);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.02em;
  line-height: 1;
  min-height: 38px;
  border: 1px solid rgba(125, 211, 255, 0.32);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(31, 83, 132, 0.96), rgba(15, 50, 91, 0.96));
  color: var(--text);
  cursor: pointer;
  padding: 0 13px;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.app-nav button:hover,
.primary-action:hover,
.secondary-action:hover,
.command:hover,
.tab:hover {
  border-color: #7dd3ff;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(70, 194, 255, 0.18), 0 0 18px rgba(255, 79, 216, 0.08);
}

.app-nav button:active,
.primary-action:active,
.secondary-action:active,
.command:active,
.tab:active,
.copy-message:active,
.plan-button:active {
  animation: press-pop 180ms ease both;
}

.brand-link {
  border-color: transparent !important;
  background: transparent !important;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 850;
  letter-spacing: 0.03em;
  padding-left: 42px !important;
  position: relative;
}

.brand-link::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 50%;
  width: 27px;
  height: 27px;
  border: 1px solid rgba(111, 182, 255, 0.9);
  border-radius: 50%;
  transform: translateY(-50%);
  background:
    radial-gradient(circle, #f8fbff 0 2px, transparent 3px),
    conic-gradient(from 90deg, var(--blue), var(--gold), var(--green), var(--blue));
  box-shadow: 0 0 24px rgba(70, 194, 255, 0.4);
}

.brand-link::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 34px;
  height: 10px;
  border: 1px solid rgba(255, 200, 87, 0.72);
  border-radius: 50%;
  transform: translateY(-50%) rotate(-26deg);
}

.nav-links,
.account-strip,
.home-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.account-strip {
  justify-content: end;
  color: var(--muted);
}

.url-pill {
  max-width: 190px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  background: #0c2445;
  color: var(--green);
  font-family: var(--font-code);
  font-size: 13px;
}

.page {
  padding: 34px 24px 24px;
}

.home-page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 34px;
  align-items: center;
  min-height: calc(100vh - 106px);
  width: min(1460px, 100%);
  margin: 0 auto;
}

.home-copy {
  max-width: 760px;
}

.eyebrow {
  font-family: var(--font-compact);
  color: var(--accent);
  font-weight: 750;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 13px;
}

.home-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 7vw, 82px);
  max-width: 900px;
  line-height: 0.98;
  margin-bottom: 20px;
  letter-spacing: 0;
  text-wrap: balance;
}

.home-copy > p:not(.eyebrow) {
  max-width: 650px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 24px;
}

.primary-action {
  background: linear-gradient(135deg, #1d9ddd, #2f6f9f 62%, #284d78);
  border-color: #6fb6ff;
  font-weight: 750;
  box-shadow: 0 12px 34px rgba(70, 194, 255, 0.22);
}

.feature-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.feature-strip span {
  font-family: var(--font-compact);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 11px;
  background: rgba(16, 37, 66, 0.78);
  color: var(--muted);
  box-shadow: inset 0 1px 0 rgba(248, 251, 255, 0.06);
}

.home-visual {
  position: relative;
  min-height: 360px;
  border: 1px solid rgba(99, 135, 170, 0.68);
  border-radius: 8px;
  background:
    linear-gradient(rgba(70, 194, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(70, 194, 255, 0.08) 1px, transparent 1px),
    radial-gradient(circle at 50% 48%, rgba(70, 194, 255, 0.22), transparent 34%),
    #0c2445;
  background-size: 34px 34px, 34px 34px, auto, auto;
  overflow: hidden;
  box-shadow: var(--panel-glow), inset 0 1px 0 rgba(248, 251, 255, 0.08);
}

.visual-title {
  position: absolute;
  top: 18px;
  left: 18px;
  color: var(--muted);
  font-family: var(--font-compact);
  font-size: 14px;
  font-weight: 700;
}

.orbit {
  position: absolute;
  inset: 70px 44px;
  border: 2px solid rgba(70, 194, 255, 0.42);
  border-radius: 50%;
  box-shadow: 0 0 26px rgba(70, 194, 255, 0.15);
}

.orbit.two {
  inset: 112px 72px;
  border-color: rgba(255, 200, 87, 0.42);
  transform: rotate(-18deg);
}

.dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 24px rgba(248, 251, 255, 0.9);
}

.dot.a { left: 22%; top: 42%; }
.dot.b { right: 22%; top: 34%; }
.dot.c { left: 54%; bottom: 20%; }

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  min-height: 100vh;
  width: min(1460px, 100%);
  margin: 0 auto;
  padding: 34px 24px 24px;
}

.app-shell.hidden {
  display: none;
}

.stage,
.control-panel {
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
  padding: 2px 2px 0;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

h2 {
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 1.2;
  font-weight: 760;
  letter-spacing: 0.015em;
}

.topbar p,
.readout p,
.ai-explainer p {
  color: var(--muted);
  line-height: 1.45;
}

.status {
  font-family: var(--font-compact);
  min-width: 138px;
  padding: 8px 12px;
  border: 1px solid rgba(125, 211, 255, 0.38);
  border-radius: 999px;
  background: rgba(6, 21, 45, 0.72);
  color: var(--muted);
  text-align: center;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.status.ok {
  color: var(--green);
}

.status.bad {
  color: #ff778a;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  padding: 6px;
  border: 1px solid rgba(125, 211, 255, 0.35);
  border-radius: 12px;
  background:
    linear-gradient(90deg, rgba(255, 79, 216, 0.08), transparent 35%, rgba(70, 194, 255, 0.08)),
    rgba(7, 27, 58, 0.58);
}

.tab,
.command {
  font-family: var(--font-tech);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.025em;
  line-height: 1;
  border: 1px solid rgba(125, 211, 255, 0.3);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(24, 74, 125, 0.92), rgba(12, 42, 80, 0.94));
  color: var(--text);
  cursor: pointer;
}

.tab {
  min-height: 40px;
  padding: 0 14px;
  flex: 1 1 auto;
}

.tab.active,
.command.active {
  border-color: #7dd3ff;
  background: linear-gradient(135deg, #1c9fd5, #284d9b 58%, #7e3fd1);
  box-shadow: inset 0 1px 0 rgba(248, 251, 255, 0.14), 0 10px 32px rgba(70, 194, 255, 0.18);
}

.canvas-wrap {
  border: 1px solid rgba(125, 211, 255, 0.52);
  border-radius: 12px;
  background:
    linear-gradient(rgba(70, 194, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(70, 194, 255, 0.05) 1px, transparent 1px),
    #061832;
  background-size: 32px 32px;
  overflow: hidden;
  box-shadow: var(--panel-glow), inset 0 1px 0 rgba(248, 251, 255, 0.08), 0 0 32px rgba(70, 194, 255, 0.08);
}

canvas {
  display: block;
  width: 100%;
  height: min(68vh, 620px);
}

.control-panel {
  align-self: start;
  display: grid;
  gap: 18px;
  border: 1px solid rgba(125, 211, 255, 0.42);
  border-radius: 12px;
  background:
    radial-gradient(circle at 15% 0%, rgba(255, 79, 216, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(10, 44, 85, 0.94), rgba(6, 26, 55, 0.96)),
    var(--surface);
  padding: 22px;
  box-shadow: var(--panel-glow), inset 0 1px 0 rgba(248, 251, 255, 0.08);
}

.readout,
.controls,
.metrics,
.ai-explainer,
.chatbot {
  display: grid;
  gap: 12px;
}

.readout,
.ai-explainer,
.chatbot,
.controls {
  border: 1px solid rgba(125, 211, 255, 0.28);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(9, 34, 69, 0.72), rgba(4, 18, 41, 0.42));
  padding: 14px;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.command {
  min-height: 38px;
  padding: 0 13px;
  box-shadow: inset 0 1px 0 rgba(248, 251, 255, 0.08);
  text-transform: uppercase;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 28px;
  color: var(--muted);
}

.toggle input {
  accent-color: var(--accent);
  inline-size: 17px;
  block-size: 17px;
}

.slider-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  color: var(--muted);
}

.slider-row label,
.toggle span {
  font-size: 14px;
}

.slider-row input {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
}

output {
  font-family: var(--font-code);
  color: var(--text);
}

.metrics {
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.metrics div {
  display: grid;
  gap: 4px;
  min-height: 62px;
  padding: 10px;
  border: 1px solid rgba(125, 211, 255, 0.34);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(18, 69, 111, 0.8), rgba(5, 24, 54, 0.9));
  box-shadow: inset 0 1px 0 rgba(248, 251, 255, 0.06);
}

.metrics span {
  font-family: var(--font-compact);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.metrics strong {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 760;
  color: #e9fbff;
}

.ai-explainer {
  border-top: 1px solid rgba(99, 135, 170, 0.38);
}

.ai-explainer h2 {
  font-size: 20px;
}

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

.ai-explainer button {
  justify-self: start;
  min-height: 36px;
  padding: 0 14px;
}

.chatbot {
  border-top: 1px solid rgba(99, 135, 170, 0.38);
}

.chatbot-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.chatbot h2 {
  font-size: 20px;
}

#chatSource {
  font-family: var(--font-compact);
  border: 1px solid rgba(115, 227, 164, 0.34);
  border-radius: 999px;
  background: rgba(115, 227, 164, 0.08);
  color: #a9f5c9;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.06em;
  padding: 5px 9px;
  white-space: nowrap;
  text-transform: uppercase;
}

.chat-messages {
  display: grid;
  align-content: start;
  justify-items: stretch;
  gap: 10px;
  min-height: 300px;
  max-height: 560px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px;
  border: 1px solid rgba(125, 211, 255, 0.34);
  border-radius: 10px;
  background:
    radial-gradient(circle at 18% 0%, rgba(70, 194, 255, 0.14), transparent 22%),
    radial-gradient(circle at 100% 18%, rgba(255, 79, 216, 0.08), transparent 24%),
    #061a35;
}

.chat-message {
  position: relative;
  max-width: 96%;
  padding: 12px 13px;
  border-radius: 7px;
  line-height: 1.48;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

.chat-message.has-code {
  width: 100%;
  max-width: 100%;
  min-height: 170px;
  max-height: 360px;
  padding: 16px 15px;
  overflow: auto;
  overscroll-behavior: contain;
  font-family: var(--font-code);
  font-size: 14px;
  line-height: 1.6;
  tab-size: 4;
  white-space: pre;
}

.chat-messages::-webkit-scrollbar,
.chat-message.has-code::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.chat-messages::-webkit-scrollbar-thumb,
.chat-message.has-code::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: #3a536a;
}

.chat-messages::-webkit-scrollbar-track,
.chat-message.has-code::-webkit-scrollbar-track {
  background: #0c2445;
}

.chat-message-text {
  white-space: inherit;
}

.chat-message.assistant.has-code .chat-message-text {
  padding-right: 58px;
}

.chat-message.has-code .chat-message-text {
  min-width: max-content;
}

.copy-message {
  position: absolute;
  top: 8px;
  right: 8px;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid #496981;
  border-radius: 6px;
  background: #132d51;
  color: #dce7f3;
  cursor: pointer;
  font: 720 12px/1 var(--font-tech);
  letter-spacing: 0.005em;
}

.copy-message:hover {
  background: #20456d;
}

.chat-message.user {
  justify-self: end;
  background: linear-gradient(135deg, #1688c7, #284d9b 62%, #743dd1);
  color: var(--text);
  box-shadow: 0 10px 30px rgba(70, 194, 255, 0.14);
}

.chat-message.assistant {
  justify-self: start;
  width: 100%;
  max-width: 100%;
  border: 1px solid rgba(125, 211, 255, 0.28);
  background: linear-gradient(180deg, #0f335c, #0b2442);
  color: #d9e3f0;
}

.chat-message.thinking {
  position: relative;
  overflow: visible;
  justify-self: start;
  width: fit-content;
  min-width: 156px;
  max-width: min(78%, 300px);
  border-color: #496981;
  background: #25344a;
  box-shadow: 0 0 0 rgba(70, 194, 255, 0);
  animation: thinking-pulse 1.2s ease-in-out infinite;
}

.chat-message.thinking .chat-message-text {
  position: relative;
  z-index: 1;
}

.chat-message.thinking .chat-message-text::after {
  display: inline-block;
  width: 28px;
  content: "";
  animation: thinking-dots 1.2s steps(4, end) infinite;
}

.chat-message.system {
  justify-self: center;
  color: var(--muted);
  font-size: 13px;
}

.visual-message {
  display: grid;
  justify-self: stretch;
  gap: 10px;
  max-width: min(100%, 820px);
  text-align: left;
}

.visual-message h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.25;
  color: var(--white);
  overflow-wrap: anywhere;
}

.visual-message p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.visual-caption {
  font-family: var(--font-tech);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.visual-explanation {
  max-width: 76ch;
  font-size: 15px;
}

.visual-frame {
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(99, 135, 170, 0.48);
  border-radius: 8px;
  background: #061832;
  box-shadow: inset 0 0 0 1px rgba(70, 194, 255, 0.08);
}

.visual-frame svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(64vh, 620px);
}

.visual-frame svg text {
  font-family: var(--font-tech), Aptos, Arial, sans-serif;
}

.chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto 78px;
  gap: 8px;
}

.chat-form textarea {
  font-family: var(--font-ui);
  min-width: 0;
  min-height: 38px;
  max-height: 130px;
  border: 1px solid rgba(125, 211, 255, 0.42);
  border-radius: 8px;
  background: rgba(3, 18, 42, 0.9);
  color: var(--text);
  padding: 9px 11px;
  line-height: 1.35;
  overflow-y: auto;
  overflow-wrap: anywhere;
  resize: none;
  white-space: pre-wrap;
}

.chat-form textarea:focus,
.dna-tools textarea:focus,
.modal-close:focus,
.command:focus,
.tab:focus {
  outline: 2px solid #6fb6ff;
  outline-offset: 2px;
}

.dna-tools {
  display: grid;
  gap: 10px;
}

.mutation-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
}

.mutation-grid .command {
  min-height: 34px;
  padding: 0 8px;
  font-size: 12px;
}

.dna-tools label {
  color: var(--muted);
  font-family: var(--font-compact);
  font-size: 13px;
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.dna-tools textarea {
  min-height: 76px;
  border: 1px solid rgba(125, 211, 255, 0.42);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(70, 194, 255, 0.06) 1px, transparent 1px),
    rgba(3, 18, 42, 0.9);
  background-size: 18px 100%;
  color: var(--text);
  font-family: var(--font-code);
  font-size: 13px;
  line-height: 1.45;
  letter-spacing: 0.04em;
  padding: 10px;
  resize: vertical;
}

.dna-output {
  display: grid;
  gap: 7px;
  border: 1px solid rgba(125, 211, 255, 0.34);
  border-radius: 10px;
  background:
    radial-gradient(circle at 0% 0%, rgba(255, 79, 216, 0.08), transparent 28%),
    rgba(7, 27, 58, 0.5);
  padding: 11px;
}

.dna-output span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-compact);
  font-weight: 780;
}

.dna-output strong {
  color: var(--text);
  font-family: var(--font-code);
  font-size: 12px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.photo-preview {
  min-height: 34px;
  padding: 8px 10px;
  border: 1px solid rgba(99, 135, 170, 0.48);
  border-radius: 7px;
  background: rgba(5, 21, 45, 0.82);
  color: #dce7f3;
  font-size: 13px;
  overflow-wrap: anywhere;
}

.photo-remove {
  justify-self: start;
  border: 0;
  background: transparent;
  color: #8ec7ff;
  cursor: pointer;
  font: inherit;
  padding: 0;
}

.photo-remove:hover {
  color: #cbe6ff;
}

.hidden {
  display: none;
}

.form-page {
  display: grid;
  place-items: start center;
}

.form-page.hidden,
.pricing-page.hidden,
.home-page.hidden {
  display: none;
}

.auth-card {
  display: grid;
  gap: 14px;
  width: min(520px, 100%);
  border: 1px solid rgba(99, 135, 170, 0.62);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(19, 48, 83, 0.94), rgba(12, 34, 65, 0.95));
  padding: 24px;
  box-shadow: var(--panel-glow), inset 0 1px 0 rgba(248, 251, 255, 0.08);
}

.auth-card p,
.pricing-page header p {
  color: var(--muted);
  line-height: 1.45;
}

.auth-card label {
  display: grid;
  gap: 7px;
  color: var(--muted);
}

.auth-card input,
.auth-card select {
  min-height: 40px;
  border: 1px solid rgba(99, 135, 170, 0.58);
  border-radius: 7px;
  background: rgba(5, 21, 45, 0.82);
  color: var(--text);
  padding: 0 11px;
}

.form-message {
  min-height: 22px;
  color: var(--accent);
}

.pricing-page {
  display: grid;
  gap: 22px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.price-card {
  display: grid;
  gap: 14px;
  min-height: 250px;
  border: 1px solid rgba(99, 135, 170, 0.6);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(19, 48, 83, 0.9), rgba(12, 34, 65, 0.94));
  padding: 22px;
  box-shadow: var(--panel-glow), inset 0 1px 0 rgba(248, 251, 255, 0.08);
}

.price-card.featured {
  border-color: #6fb6ff;
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 200, 87, 0.14), transparent 28%),
    linear-gradient(180deg, rgba(28, 70, 109, 0.98), rgba(15, 39, 72, 0.98));
  transform: translateY(-6px);
}

.price-card p {
  color: var(--muted);
  line-height: 1.45;
}

.price-card strong {
  font-size: 30px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(2, 11, 25, 0.74);
  backdrop-filter: blur(6px);
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  position: relative;
  width: min(560px, 100%);
  max-height: min(680px, calc(100vh - 48px));
  overflow: auto;
  border: 1px solid #6fa6d2;
  border-radius: 10px;
  background: linear-gradient(180deg, #173457, #0d2748);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.46);
  padding: 28px;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
}

.modal-kicker {
  margin-bottom: 10px;
  color: var(--accent);
  font-weight: 700;
}

.modal-card h2 {
  max-width: calc(100% - 90px);
  margin-bottom: 8px;
}

.modal-source {
  margin-bottom: 18px;
  color: var(--muted);
}

.modal-text {
  white-space: pre-wrap;
  color: var(--text);
  font-size: 20px;
  line-height: 1.5;
}

/* Modern edtech layout refresh */
:root {
  --bg: #071426;
  --surface: #0d2037;
  --surface-2: #132d4a;
  --line: #2a4663;
  --line-bright: #66d9ef;
  --text: #f3f7fb;
  --muted: #9fb1c4;
  --blue: #4fb7ff;
  --green: #7cf2bd;
  --gold: #ffce6b;
  --accent: #f26d9f;
  --violet: #8b8dff;
  --panel-glow: 0 18px 54px rgba(0, 0, 0, 0.24);
}

body {
  background:
    linear-gradient(90deg, rgba(79, 183, 255, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(79, 183, 255, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, #0a1c32 0%, #071426 48%, #08111f 100%);
  background-size: 42px 42px, 42px 42px, auto;
}

.app-nav {
  width: min(1500px, calc(100% - 32px));
  margin-top: 16px;
  padding: 10px 12px;
  border-radius: 8px;
  border-color: rgba(139, 166, 191, 0.28);
  background: rgba(8, 20, 36, 0.88);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.24);
}

.brand-link {
  font-size: 20px;
  letter-spacing: 0;
}

.brand-link::before {
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(124, 242, 189, 0.95), rgba(79, 183, 255, 0.95));
  box-shadow: none;
}

.brand-link::after {
  display: none;
}

.app-nav button,
.primary-action,
.secondary-action,
.tab,
.command {
  border-radius: 7px;
  letter-spacing: 0;
  text-transform: none;
  background: rgba(17, 43, 70, 0.9);
}

.nav-links button {
  background: transparent;
  border-color: transparent;
  color: #c7d4e3;
}

.nav-links button:hover {
  background: rgba(79, 183, 255, 0.1);
}

.url-pill {
  border-radius: 7px;
  background: rgba(124, 242, 189, 0.08);
  color: #aaf8d6;
}

.page {
  padding: 44px 24px 24px;
}

.home-page {
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.75fr);
  gap: 48px;
  width: min(1500px, 100%);
  min-height: calc(100vh - 112px);
}

.eyebrow {
  color: var(--green);
  letter-spacing: 0.06em;
}

.home-copy h1 {
  max-width: 980px;
  font-family: var(--font-ui);
  font-size: clamp(46px, 6.6vw, 88px);
  font-weight: 850;
  line-height: 0.96;
  text-transform: none;
}

.home-copy > p:not(.eyebrow) {
  max-width: 720px;
  color: #b8c7d8;
}

.primary-action {
  border-color: rgba(124, 242, 189, 0.5);
  background: linear-gradient(135deg, #37c4a0, #2488d2);
  color: #06111e;
  box-shadow: 0 14px 34px rgba(55, 196, 160, 0.2);
}

.secondary-action {
  background: rgba(18, 43, 70, 0.84);
}

.feature-strip span {
  border-radius: 7px;
  background: rgba(13, 32, 55, 0.78);
}

.home-visual {
  border-radius: 8px;
  border-color: rgba(139, 166, 191, 0.28);
  background:
    linear-gradient(rgba(124, 242, 189, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 183, 255, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(13, 32, 55, 0.92), rgba(8, 18, 32, 0.96));
  background-size: 30px 30px, 30px 30px, auto;
  box-shadow: var(--panel-glow);
}

.visual-title {
  color: #d8e5f2;
}

.orbit {
  border-radius: 8px;
  border-color: rgba(79, 183, 255, 0.32);
}

.orbit.two {
  border-color: rgba(124, 242, 189, 0.28);
}

.dot {
  border-radius: 4px;
  background: var(--green);
  box-shadow: 0 0 18px rgba(124, 242, 189, 0.5);
}

.app-shell {
  width: min(1500px, 100%);
  grid-template-columns: minmax(0, 1fr) minmax(380px, 430px);
  gap: 18px;
  padding: 30px 24px 24px;
}

.topbar {
  min-height: 66px;
  padding: 0;
}

h1 {
  font-family: var(--font-ui);
  font-size: 30px;
  text-transform: none;
  letter-spacing: 0;
}

h2 {
  font-family: var(--font-ui);
  font-size: 19px;
  text-transform: none;
  letter-spacing: 0;
}

.status,
#chatSource {
  border-radius: 7px;
  letter-spacing: 0.02em;
}

.tabs {
  gap: 4px;
  margin-bottom: 12px;
  padding: 5px;
  border-radius: 8px;
  border-color: rgba(139, 166, 191, 0.24);
  background: rgba(10, 25, 43, 0.78);
}

.tab {
  min-height: 38px;
  background: transparent;
  border-color: transparent;
  color: #b8c7d8;
}

.tab.active {
  color: var(--white);
  border-color: rgba(79, 183, 255, 0.28);
  background: rgba(79, 183, 255, 0.14);
  box-shadow: none;
}

.canvas-wrap {
  border-radius: 8px;
  border-color: rgba(139, 166, 191, 0.28);
  background:
    linear-gradient(rgba(79, 183, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 183, 255, 0.045) 1px, transparent 1px),
    #07182c;
  box-shadow: var(--panel-glow);
}

canvas {
  height: min(70vh, 660px);
}

.control-panel {
  gap: 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  padding: 0;
  box-shadow: none;
}

.readout,
.ai-explainer,
.chatbot,
.controls,
.metrics div,
.auth-card,
.price-card,
.modal-card {
  border-radius: 8px;
  border-color: rgba(139, 166, 191, 0.26);
  background: rgba(11, 28, 49, 0.82);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.readout,
.ai-explainer,
.chatbot,
.controls {
  padding: 13px;
}

.ai-explainer,
.chatbot {
  border-top: 1px solid rgba(139, 166, 191, 0.26);
}

.command {
  min-height: 36px;
  border-color: rgba(139, 166, 191, 0.24);
  background: rgba(19, 48, 78, 0.86);
}

.command.secondary {
  background: rgba(10, 28, 49, 0.88);
}

.command:hover,
.tab:hover,
.app-nav button:hover,
.primary-action:hover,
.secondary-action:hover {
  box-shadow: 0 10px 24px rgba(79, 183, 255, 0.14);
}

.chat-messages {
  min-height: 320px;
  max-height: 620px;
  border-radius: 8px;
  border-color: rgba(139, 166, 191, 0.24);
  background: rgba(6, 20, 37, 0.92);
}

.chat-message {
  border-radius: 8px;
}

.chat-message.user {
  background: linear-gradient(135deg, #2488d2, #37c4a0);
  color: #06111e;
}

.chat-message.assistant {
  background: rgba(14, 38, 64, 0.96);
}

.chat-message.thinking {
  background: #16283d;
}

.chat-form {
  grid-template-columns: minmax(0, 1fr) 112px 74px;
}

.chat-form textarea,
.dna-tools textarea,
.auth-card input,
.auth-card select {
  border-radius: 7px;
  border-color: rgba(139, 166, 191, 0.28);
  background: rgba(5, 18, 33, 0.9);
}

.metrics {
  gap: 10px;
}

.metrics div {
  min-height: 58px;
  background: rgba(11, 28, 49, 0.72);
}

.metrics strong {
  font-family: var(--font-ui);
}

@media (max-width: 980px) {
  .app-nav,
  .app-shell {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .app-nav {
    gap: 12px;
  }

  .nav-links,
  .account-strip {
    flex-wrap: wrap;
    justify-content: start;
  }

  .home-page,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .control-panel {
    align-self: stretch;
  }

  canvas {
    height: 56vh;
  }
}

@media (max-width: 560px) {
  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .button-row,
  .metrics {
    grid-template-columns: 1fr;
  }
}

@keyframes press-pop {
  0% {
    transform: translateY(-1px) scale(1);
  }
  45% {
    transform: translateY(1px) scale(0.97);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes thinking-pulse {
  0% {
    border-color: #496981;
    background: #25344a;
    box-shadow: 0 0 0 rgba(70, 194, 255, 0);
  }
  50% {
    border-color: #6fb6ff;
    background: #2c4059;
    box-shadow: 0 0 18px rgba(70, 194, 255, 0.14);
  }
  100% {
    border-color: #496981;
    background: #25344a;
    box-shadow: 0 0 0 rgba(70, 194, 255, 0);
  }
}

@keyframes thinking-dots {
  0% {
    content: "";
  }
  25% {
    content: ".";
  }
  50% {
    content: "..";
  }
  75%,
  100% {
    content: "...";
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-nav button,
  .primary-action,
  .secondary-action,
  .command,
  .tab,
  .copy-message,
  .plan-button {
    animation: none !important;
    transition: none !important;
  }

  .chat-message.thinking,
  .chat-message.thinking .chat-message-text::after {
    animation: none !important;
  }
}

@media (max-width: 980px) {
  .app-nav {
    grid-template-columns: auto 1fr;
    gap: 8px 12px;
    width: min(100% - 20px, 720px);
    padding: 10px;
  }

  .brand-link {
    grid-column: 1;
    grid-row: 1;
    min-height: 34px;
    font-size: 18px;
  }

  .nav-links {
    grid-column: 1 / -1;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .nav-links button {
    flex: 0 0 auto;
    min-height: 34px;
    padding: 0 10px;
    white-space: nowrap;
  }

  .account-strip {
    grid-column: 2;
    grid-row: 1;
    justify-content: end;
    gap: 6px;
  }

  .account-strip button {
    min-height: 34px;
    padding: 0 10px;
  }

  .url-pill {
    display: none;
  }

  .home-page {
    min-height: auto;
    padding-top: 30px;
  }

  .home-copy h1 {
    font-size: clamp(40px, 10vw, 64px);
  }

  .home-visual {
    min-height: 300px;
  }

  .app-shell {
    gap: 16px;
    padding: 24px 16px 20px;
  }

  .topbar {
    min-height: auto;
  }

  .tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  .tab {
    flex: 0 0 auto;
  }

  .control-panel {
    gap: 12px;
  }
}

@media (max-width: 560px) {
  .app-nav {
    width: calc(100% - 16px);
    margin-top: 8px;
  }

  .brand-link {
    font-size: 16px;
    padding-left: 36px !important;
  }

  #accountName {
    display: none;
  }

  .app-nav button,
  .tab,
  .command {
    font-size: 12px;
  }

  .home-copy > p:not(.eyebrow) {
    font-size: 17px;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }

  .chat-form .command {
    width: 100%;
  }
}