:root {
  --green-950: #0d1f0d;
  --green-900: #122212;
  --green-800: #1a3318;
  --green-700: #244d22;
  --green-600: #2d6628;
  --green-500: #3a8035;
  --green-300: #7cc474;
  --green-200: #b0dfa9;
  --green-100: #dff2db;
  --green-50: #f2faf0;
  --cream: #faf8f3;
  --text: #1a1a18;
  --muted: #5a5a52;
  --subtle: #8a8a7e;
  --line: rgba(26, 51, 24, 0.14);
  --line-strong: rgba(26, 51, 24, 0.24);
  --radius: 10px;
  --radius-lg: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "DM Sans", sans-serif;
  background: var(--cream);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.6;
}

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 60px;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(250, 248, 243, 0.93);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--green-800);
  text-decoration: none;
  font-family: "DM Serif Display", serif;
  font-size: 20px;
}
.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--green-800);
  color: var(--green-100);
  font-family: "DM Sans", sans-serif;
  font-size: 12px;
  font-weight: 700;
}
.nav-links { display: flex; gap: 26px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
.nav-links a:hover { color: var(--green-700); }

.workspace-tabs {
  position: sticky;
  top: 60px;
  z-index: 90;
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(250, 248, 243, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.workspace-tab {
  min-width: 160px;
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
}
.workspace-tab.active {
  background: var(--green-800);
  color: white;
  border-color: var(--green-800);
}
.app-view { display: none; }
.app-view.active { display: block; }

.hero {
  max-width: 840px;
  margin: 0 auto;
  padding: 140px 40px 84px;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  padding: 5px 14px;
  margin-bottom: 24px;
  border: 1px solid var(--green-200);
  border-radius: 999px;
  background: var(--green-100);
  color: var(--green-700);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}
h1, h2 {
  font-family: "DM Serif Display", serif;
  color: var(--green-900);
  line-height: 1.12;
}
h1 {
  font-size: clamp(38px, 5vw, 58px);
  margin-bottom: 20px;
}
h1 em { color: var(--green-600); }
.hero p {
  max-width: 620px;
  margin: 0 auto 34px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 300;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 76px 40px;
}
.section-kicker {
  color: var(--green-600);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section h2 {
  font-size: clamp(30px, 4vw, 40px);
  margin-bottom: 12px;
}
.section-lead {
  max-width: 650px;
  margin-bottom: 34px;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.feature-grid article,
fieldset,
.settings-bar,
.project-manager,
.account-dialog,
.table-shell {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.feature-grid article {
  padding: 24px;
  transition: transform 0.18s, box-shadow 0.18s;
}
.feature-grid article:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(26, 51, 24, 0.08);
}
.feature-grid span {
  color: var(--green-500);
  font-weight: 700;
  font-size: 12px;
}
h3 {
  margin: 8px 0;
  color: var(--green-900);
  font-size: 17px;
}
.feature-grid p,
.fineprint,
.project-manager p,
small {
  color: var(--muted);
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}
th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
th {
  color: var(--green-700);
  font-size: 12px;
  text-transform: uppercase;
}
.table-shell { overflow-x: auto; }
.fineprint { margin-top: 12px; font-size: 13px; }

.data-section {
  max-width: none;
  background: white;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.data-section > * {
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
}
.settings-bar,
.project-manager {
  padding: 16px 18px;
  margin-bottom: 24px;
}
.settings-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 12px;
  background: var(--green-50);
}
.settings-bar label,
.project-manager label {
  flex: 1 1 260px;
}
.custom-provider-fields {
  display: none;
  width: 100%;
  gap: 10px;
}
.custom-provider-fields.visible { display: flex; }
.project-manager {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 12px;
}
.project-manager p { grid-column: 1 / -1; font-size: 13px; }
.project-actions,
.dialog-actions,
.report-actions,
.chatbot-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
fieldset {
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
legend {
  padding: 0 6px;
  color: var(--green-700);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}
label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}
.wide { grid-column: 1 / -1; }
input, select, textarea {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 9px 11px;
  background: white;
  color: var(--text);
  font: inherit;
}
textarea {
  min-height: 84px;
  resize: vertical;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px rgba(58, 128, 53, 0.11);
}

button, .primary-btn, .ghost-btn {
  min-height: 38px;
  border-radius: 9px;
  border: 1px solid transparent;
  padding: 9px 16px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--green-800);
  color: white;
}
.primary-btn:hover { background: var(--green-700); }
.ghost-btn,
.account-btn {
  background: var(--green-100);
  color: var(--green-800);
  border-color: var(--green-200);
}
.danger { color: #8c2f25; background: #fff0ed; border-color: #f0c1b8; }
.analyze-btn {
  display: flex;
  margin: 34px auto 0;
  padding: 14px 34px;
  font-size: 16px;
}
.analyze-btn:disabled { background: var(--subtle); cursor: not-allowed; }

.analysis-section {
  display: none;
  max-width: none;
  background: var(--green-950);
  color: var(--green-100);
}
.analysis-section.visible { display: block; }
.analysis-section > * {
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
}
.analysis-section h2 { color: white; }
.analysis-section .section-kicker { color: var(--green-300); }
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin: 24px auto;
}
.tab-btn {
  background: transparent;
  color: rgba(255, 255, 255, 0.58);
  border-radius: 8px 8px 0 0;
  border-bottom: 2px solid transparent;
}
.tab-btn.active {
  color: var(--green-300);
  border-bottom-color: var(--green-300);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.analysis-content {
  min-height: 240px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.055);
  color: rgba(255, 255, 255, 0.9);
  overflow-x: auto;
}
.analysis-content h2,
.analysis-content h3 {
  color: white;
  margin: 18px 0 8px;
}
.analysis-content p,
.analysis-content ul,
.analysis-content table { margin-bottom: 14px; }
.analysis-content ul { padding-left: 20px; }
.analysis-content strong { color: white; }
.report-actions { margin-top: 18px; }

.chatbot-card {
  margin-top: 28px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.055);
  overflow: hidden;
}
.chatbot-header {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.chatbot-header h3 { color: white; margin: 0; }
.chatbot-header small { color: rgba(255, 255, 255, 0.55); }
.chatbot-messages {
  height: 300px;
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-msg {
  max-width: 86%;
  padding: 11px 13px;
  border-radius: 12px;
}
.chat-msg.user {
  align-self: flex-end;
  background: var(--green-700);
  color: white;
}
.chat-msg.ai {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.09);
  color: rgba(255, 255, 255, 0.9);
}
.chatbot-quick { padding: 0 16px 12px; }
.chatbot-quick button {
  background: rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.14);
}
.chatbot-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.chatbot-input-row textarea {
  min-height: 46px;
  max-height: 130px;
}

.ai-view {
  min-height: calc(100vh - 60px);
  padding-top: 44px;
  background: var(--green-950);
}
.ai-lab h2 { color: white; }
.ai-lab .section-kicker { color: var(--green-300); }
.ai-lab .section-lead { color: rgba(255, 255, 255, 0.72); }
.ai-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 22px;
  align-items: start;
}
.ai-context-panel {
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.86);
}
.ai-context-panel h3 { color: white; margin-top: 0; }
.ai-context-panel p {
  margin: 10px 0 18px;
  color: rgba(255, 255, 255, 0.68);
}
.ai-combo-card { margin-top: 0; }

.account-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(13, 31, 13, 0.55);
}
.account-modal.visible { display: flex; }
.account-dialog {
  width: min(460px, 100%);
  padding: 28px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
}
.account-dialog h2 { margin-bottom: 8px; }
.account-dialog p { color: var(--muted); margin-bottom: 16px; }
.account-dialog label { margin-bottom: 12px; }

footer {
  padding: 32px 40px;
  text-align: center;
  color: rgba(255, 255, 255, 0.45);
  background: var(--green-950);
}
footer strong { color: rgba(255, 255, 255, 0.76); }

@media (max-width: 920px) {
  .topbar { padding: 0 18px; }
  .nav-links { display: none; }
  .section, .hero { padding-left: 22px; padding-right: 22px; }
  .feature-grid, .form-grid { grid-template-columns: 1fr; }
  .workspace-tabs { justify-content: stretch; }
  .workspace-tab { flex: 1; min-width: 0; }
  .project-manager { grid-template-columns: 1fr; }
  .ai-layout { grid-template-columns: 1fr; }
  .chatbot-input-row { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .brand { font-size: 18px; }
  .hero { padding-top: 108px; }
  fieldset { grid-template-columns: 1fr; padding: 20px; }
  .chat-msg { max-width: 100%; }
}