/* businessconsultant.services - Clean, professional, tool-first */

:root {
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --text: #1A1A1A;
  --text-secondary: #555555;
  --accent: #1A3A5C;
  --accent-hover: #0F2840;
  --border: #E0DED8;
  --border-light: #EEEDEA;
  --success: #1A5C3A;
  --error: #8B2020;
  --font-display: 'Georgia', 'Times New Roman', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, monospace;
  --max-width: 720px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding-bottom: 2px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  border-bottom: 1px solid var(--accent);
}

/* Main content */
main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  width: 100%;
}

/* Tool page (homepage) */
.hero {
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.subhead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Diagnostic form */
.diagnostic-form {
  margin-bottom: 2rem;
}

textarea {
  width: 100%;
  padding: 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  resize: vertical;
  min-height: 180px;
  transition: border-color 0.2s;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea::placeholder {
  color: #999;
  font-style: italic;
}

.form-meta {
  display: flex;
  justify-content: flex-end;
  padding: 0.5rem 0;
}

#char-count {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

#submit-btn {
  display: block;
  width: 100%;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  color: #FFFFFF;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}

#submit-btn:hover {
  background: var(--accent-hover);
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Loading */
.loading {
  text-align: center;
  padding: 2rem 0;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Error */
.error-message {
  padding: 1rem 1.25rem;
  background: #FDF2F2;
  border: 1px solid #F0D0D0;
  border-radius: 6px;
  margin-bottom: 2rem;
}

.error-message p {
  color: var(--error);
  font-size: 0.95rem;
}

.error-message a {
  color: var(--accent);
}

/* Diagnostic result */
.diagnostic-result {
  border-top: 2px solid var(--accent);
  padding-top: 2rem;
  margin-top: 1rem;
}

.diagnostic-result h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text);
}

#brief-content p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

/* CTA block */
.cta-block {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  text-align: center;
}

.cta-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.cta-button {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  color: #FFFFFF;
  background: var(--accent);
  text-decoration: none;
  border-radius: 6px;
  transition: background 0.2s;
}

.cta-button:hover {
  background: var(--accent-hover);
}

.methodology-link {
  margin-top: 1.5rem;
  font-size: 0.875rem;
}

.methodology-link a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.methodology-link a:hover {
  border-color: var(--accent);
}

/* Content page (methodology) */
.content-page article {
  max-width: var(--max-width);
}

.content-page h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.content-page h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.content-page h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.content-page p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.content-page strong {
  font-weight: 600;
  color: var(--text);
}

.content-page a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.content-page a:hover {
  border-color: var(--accent);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.site-footer p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--text);
}

/* Responsive */
@media (max-width: 600px) {
  .hero h1,
  .content-page h1 {
    font-size: 1.6rem;
  }

  .site-header nav {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }

  .nav-links {
    gap: 1rem;
  }
}