/* ========================================
   RENEE BROWN INC. — White Canvas, Clean Professional
   White bg, black/navy headings, red CTAs
   ======================================== */

:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  --space-1:  0.25rem; --space-2:  0.5rem; --space-3:  0.75rem;
  --space-4:  1rem;    --space-5:  1.25rem; --space-6:  1.5rem;
  --space-8:  2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;   --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.25rem; --radius-md: 0.375rem;
  --radius-lg: 0.5rem;  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  --font-display: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

/* --- WHITE CANVAS PALETTE --- */
:root, [data-theme="light"] {
  --color-bg:           #FFFFFF;
  --color-surface:      #F8F9FA;
  --color-surface-2:    #F1F3F5;
  --color-border:       #E5E7EB;
  --color-divider:      #F0F0F0;

  --color-heading:      #0D1B2A;
  --color-text:         #1A1A1A;
  --color-text-muted:   #3D4045;
  --color-text-faint:   #71747A;

  --color-red:          #DC2626;
  --color-red-hover:    #B91C1C;
  --color-red-active:   #991B1B;
  --color-red-light:    #FEF2F2;

  --color-navy:         #0D1B2A;
  --color-navy-light:   #1B2D45;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
  --color-bg:           #0B1120;
  --color-surface:      #111827;
  --color-surface-2:    #1F2937;
  --color-border:       #374151;
  --color-divider:      #1F2937;
  --color-heading:      #F9FAFB;
  --color-text:         #E5E7EB;
  --color-text-muted:   #9CA3AF;
  --color-text-faint:   #6B7280;
  --color-red:          #EF4444;
  --color-red-hover:    #F87171;
  --color-red-active:   #DC2626;
  --color-red-light:    #1F1111;
  --color-navy:         #F9FAFB;
  --color-navy-light:   #E5E7EB;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:#0B1120;--color-surface:#111827;--color-surface-2:#1F2937;
    --color-border:#374151;--color-divider:#1F2937;--color-heading:#F9FAFB;
    --color-text:#E5E7EB;--color-text-muted:#9CA3AF;--color-text-faint:#6B7280;
    --color-red:#EF4444;--color-red-hover:#F87171;--color-red-active:#DC2626;
    --color-red-light:#1F1111;--color-navy:#F9FAFB;--color-navy-light:#E5E7EB;
    --shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg:0 12px 40px rgba(0,0,0,0.4);
  }
}

/* ========================================
   LAYOUT
   ======================================== */
.container { max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-4); }
.container--narrow { max-width: var(--content-default); }

/* ========================================
   HEADER
   ======================================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s var(--ease-out);
}
[data-theme="dark"] .site-header { background: rgba(11,17,32,0.97); }
.site-header--scrolled { box-shadow: var(--shadow-sm); }

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-3) 0; max-width: var(--content-wide);
  margin-inline: auto; padding-inline: var(--space-4);
}

.logo-mark {
  display: flex; align-items: center; gap: var(--space-3);
  text-decoration: none; color: var(--color-heading);
}
.logo-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: var(--radius-sm); object-fit: contain;
}

.logo-text {
  font-family: var(--font-display); font-size: var(--text-lg);
  font-weight: 700; letter-spacing: -0.01em; line-height: 1.15;
}
.logo-sub {
  display: block; font-family: var(--font-body); font-size: var(--text-xs);
  font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-text-muted); margin-top: 1px;
}

.nav-links {
  display: flex; align-items: center; gap: var(--space-6); list-style: none;
}
.nav-links a {
  font-size: var(--text-sm); color: var(--color-text-muted);
  text-decoration: none; font-weight: 500;
  transition: color var(--transition-interactive);
}
.nav-links a:hover { color: var(--color-heading); }
.nav-links .btn-red { color: #FFFFFF !important; font-weight: 800; }
.nav-links .btn-red:hover { color: #FFFFFF !important; }

.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-heading); background: var(--color-surface); }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 36px; height: 36px; padding: 6px;
}
.nav-toggle span {
  display: block; width: 100%; height: 2px; background: var(--color-heading);
  border-radius: 2px; transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; inset: 0; top: 64px; flex-direction: column;
    background: var(--color-bg); padding: var(--space-8) var(--space-6);
    gap: var(--space-6); transform: translateX(100%);
    transition: transform 0.35s var(--ease-out); z-index: 49;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: var(--text-lg); }
}

/* ========================================
   BUTTONS — Red primary
   ======================================== */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-body); font-size: var(--text-xs); font-weight: 700;
  padding: var(--space-2) var(--space-5); border-radius: var(--radius-md);
  text-decoration: none; letter-spacing: 0.02em; cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive),
              box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn svg { width: 14px; height: 14px; }

.btn-red {
  background: var(--color-red); color: #FFFFFF !important;
}
.btn-red:hover { background: var(--color-red-hover); }

.btn-outline-dark {
  background: transparent; color: var(--color-heading);
  border: 2px solid var(--color-heading);
}
.btn-outline-dark:hover { background: var(--color-heading); color: #FFFFFF; }

.btn-lg { padding: var(--space-3) var(--space-6); font-size: var(--text-sm); }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }

/* ========================================
   HERO — White canvas with photo accent
   ======================================== */
.hero {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0 clamp(var(--space-12), 6vw, var(--space-20));
  background: var(--color-bg);
}

.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16)); align-items: center;
  max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-4);
}

.hero-tagline {
  font-family: var(--font-body); font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-red);
  margin-bottom: var(--space-4); display: flex; align-items: center; gap: var(--space-3);
}
.hero-tagline::before {
  content: ''; display: block; width: 40px; height: 2px; background: var(--color-red);
}

.hero h1 {
  font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 800;
  color: var(--color-heading); margin-bottom: var(--space-6);
  letter-spacing: -0.025em; line-height: 1.06;
}

.hero-description {
  font-size: var(--text-base); color: var(--color-text-muted);
  max-width: 48ch; line-height: 1.7; margin-bottom: var(--space-8);
}

.hero-cta-group { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.hero-image {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
}
.hero-image img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 1; }

.hero-stats {
  display: flex; gap: clamp(var(--space-6), 3vw, var(--space-12));
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  padding-top: var(--space-8); border-top: 1px solid var(--color-divider);
  max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-4);
}
.hero-stat-number {
  font-family: var(--font-display); font-size: var(--text-xl);
  font-weight: 800; color: var(--color-heading); line-height: 1.1; text-align: center;
}
.hero-stat-label {
  font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-1); text-align: center;
}

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-image { max-width: 480px; }
  .hero-stats { flex-wrap: wrap; gap: var(--space-4); }
}

/* ========================================
   SECTIONS
   ======================================== */
.section { padding: clamp(var(--space-12), 8vw, var(--space-24)) 0; }
.section--white { background: var(--color-bg); }
.section--gray { background: var(--color-surface); }

.section-header {
  text-align: center; margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}
.section-label {
  font-family: var(--font-body); font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-red);
  margin-bottom: var(--space-3);
}
.section-title {
  font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 800;
  color: var(--color-heading); letter-spacing: -0.02em; margin-bottom: var(--space-4);
}
.section-subtitle {
  font-size: var(--text-base); color: var(--color-text-muted);
  max-width: 60ch; margin-inline: auto; line-height: 1.7;
}

/* ========================================
   ABOUT
   ======================================== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: center;
}
.about-image {
  border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 3/4;
  background: var(--color-surface);
}
.about-image img {
  width: 100%; height: 100%; object-fit: cover; object-position: center top;
}

.about-text h2 {
  font-family: var(--font-display); font-size: var(--text-xl); font-weight: 800;
  color: var(--color-heading); margin-bottom: var(--space-4); letter-spacing: -0.01em;
}
.about-text p {
  font-size: var(--text-base); color: var(--color-text-muted);
  line-height: 1.7; margin-bottom: var(--space-4);
}

.about-credentials {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  margin-top: var(--space-6); padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.credential {
  display: flex; align-items: center; gap: var(--space-2);
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs); font-weight: 600; color: var(--color-text);
}
.credential svg { width: 16px; height: 16px; color: var(--color-red); flex-shrink: 0; }

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-image { max-width: 300px; margin-inline: auto; aspect-ratio: 1; }
}

/* ========================================
   DIVE — Light gray bg with photo
   ======================================== */
.dive-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: center;
}
.dive-visual {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
}
.dive-visual img { width: 100%; height: auto; }

.dive-content h2 {
  font-family: var(--font-display); font-size: var(--text-xl); font-weight: 800;
  color: var(--color-heading); margin-bottom: var(--space-2); letter-spacing: -0.01em;
}
.dive-acronym {
  font-size: var(--text-sm); color: var(--color-red); font-weight: 700;
  margin-bottom: var(--space-4); letter-spacing: 0.04em; text-transform: uppercase;
}
.dive-content p {
  font-size: var(--text-base); color: var(--color-text-muted);
  line-height: 1.7; margin-bottom: var(--space-4);
}

.dive-pillars { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); margin-top: var(--space-6); }
.pillar-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-4);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.pillar-card:hover { border-color: var(--color-red); box-shadow: var(--shadow-sm); }
.pillar-letter {
  font-family: var(--font-display); font-size: var(--text-xl);
  font-weight: 800; color: var(--color-red); line-height: 1;
}
.pillar-word { font-size: var(--text-sm); font-weight: 700; color: var(--color-heading); margin-top: var(--space-1); }
.pillar-desc { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-1); line-height: 1.5; }

@media (max-width: 768px) {
  .dive-grid { grid-template-columns: 1fr; }
  .dive-visual { order: -1; }
}

/* ========================================
   SERVICES
   ======================================== */
.services-cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr));
  gap: var(--space-6);
}
.service-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive), border-color var(--transition-interactive);
}
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: var(--color-red); }

.service-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--color-navy); display: flex; align-items: center;
  justify-content: center; margin-bottom: var(--space-4); color: #FFFFFF;
}
.service-icon svg { width: 24px; height: 24px; }

.service-card h3 {
  font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-heading); margin-bottom: var(--space-2);
}
.service-card p { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.65; }

.service-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.tag {
  font-size: var(--text-xs); font-weight: 600; padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md); background: var(--color-surface);
  color: var(--color-navy); border: 1px solid var(--color-border);
}

.visual-break {
  width: 100%; border-radius: var(--radius-lg); overflow: hidden;
  margin-top: clamp(var(--space-8), 4vw, var(--space-16)); box-shadow: var(--shadow-md);
}
.visual-break img { width: 100%; height: 300px; object-fit: cover; }

/* ========================================
   AFFILIATIONS
   ======================================== */
.affiliations-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
  gap: var(--space-4);
}
.affiliation-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6); text-align: center;
  display: flex; flex-direction: column; align-items: center;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.affiliation-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.affiliation-logo {
  width: 80px; height: 80px; object-fit: contain; margin-bottom: var(--space-3);
  border-radius: var(--radius-md); display: block;
}
.affiliation-name {
  font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-heading); margin-bottom: var(--space-1);
}
.affiliation-role { font-size: var(--text-sm); color: var(--color-text-muted); }
.affiliation-link {
  display: inline-flex; align-items: center; gap: var(--space-1);
  font-size: var(--text-xs); color: var(--color-red); font-weight: 600; margin-top: var(--space-3);
}

/* ========================================
   CTA / CONTACT — Clean white with red button
   ======================================== */
.cta-section {
  background: var(--color-surface); border-top: 1px solid var(--color-divider);
}
.cta-inner { text-align: center; max-width: 640px; margin-inline: auto; }
.cta-inner h2 {
  font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 800;
  color: var(--color-heading); margin-bottom: var(--space-4); letter-spacing: -0.02em;
}
.cta-inner > p {
  font-size: var(--text-base); color: var(--color-text-muted);
  line-height: 1.7; margin-bottom: var(--space-6); margin-inline: auto;
}

.contact-form { display: grid; gap: var(--space-4); text-align: left; margin-top: var(--space-6); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 480px) { .form-row { grid-template-columns: 1fr; } }

.form-group label {
  display: block; font-size: var(--text-xs); font-weight: 600;
  color: var(--color-text); margin-bottom: var(--space-1);
  letter-spacing: 0.04em; text-transform: uppercase;
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: var(--space-3) var(--space-4);
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); font-size: var(--text-base); color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--color-text-faint); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--color-red);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ========================================
   QUOTE
   ======================================== */
.quote-strip {
  background: var(--color-bg); border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding: clamp(var(--space-8), 4vw, var(--space-12)) var(--space-4);
}
.quote-strip-inner { max-width: var(--content-default); margin-inline: auto; text-align: center; }
.quote-strip blockquote {
  font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700;
  color: var(--color-heading); line-height: 1.4; margin-bottom: var(--space-3);
}
.quote-strip cite {
  font-family: var(--font-body); font-size: var(--text-sm);
  color: var(--color-text-muted); font-style: normal; font-weight: 500;
}

/* ========================================
   FOOTER
   ======================================== */
.site-footer {
  background: var(--color-bg); border-top: 1px solid var(--color-divider); padding: var(--space-8) 0;
}
.footer-brand {
  display: flex; justify-content: center; margin-bottom: var(--space-6);
  padding-bottom: var(--space-6); border-bottom: 1px solid var(--color-divider);
}
.footer-logo {
  max-width: 280px; height: auto; object-fit: contain;
}
[data-theme="dark"] .footer-logo { filter: invert(1); }
.footer-nav {
  display: flex; justify-content: center; gap: var(--space-6); flex-wrap: wrap;
  margin-bottom: var(--space-6); padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-divider);
}
.footer-nav a {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  text-decoration: none; transition: color var(--transition-interactive);
}
.footer-nav a:hover { color: var(--color-heading); }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--space-4);
}

/* ========================================
   PAGE HERO (subpages)
   ======================================== */
.page-hero {
  background: var(--color-surface); padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
  border-bottom: 1px solid var(--color-divider);
}
.page-hero .container { max-width: var(--content-wide); }
.page-hero-label {
  font-family: var(--font-body); font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-red);
  margin-bottom: var(--space-3); display: flex; align-items: center; gap: var(--space-3);
}
.page-hero-label::before {
  content: ''; display: block; width: 40px; height: 2px; background: var(--color-red);
}
.page-hero h1 {
  font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 800;
  color: var(--color-heading); letter-spacing: -0.02em; margin-bottom: var(--space-4);
}
.page-hero p {
  font-size: var(--text-base); color: var(--color-text-muted);
  max-width: 60ch; line-height: 1.7;
}

/* ========================================
   FOUR-BUTTON CTA GRID (homepage)
   ======================================== */
.cta-buttons {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: var(--space-4); margin-top: var(--space-8);
}
.cta-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: var(--space-6) var(--space-4);
  background: var(--color-bg); border: 2px solid var(--color-border);
  border-radius: var(--radius-lg); text-decoration: none;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.cta-card:hover { border-color: var(--color-red); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.cta-card-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--color-navy); display: flex; align-items: center;
  justify-content: center; margin-bottom: var(--space-3); color: #FFFFFF;
}
.cta-card-icon svg { width: 24px; height: 24px; }
.cta-card-title {
  font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-heading); margin-bottom: var(--space-1);
}
.cta-card-desc {
  font-size: var(--text-xs); color: var(--color-text-muted);
}

/* ========================================
   DETAIL CARDS (subpages)
   ======================================== */
.detail-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-8);
  margin-bottom: var(--space-6);
}
.detail-card h3 {
  font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700;
  color: var(--color-heading); margin-bottom: var(--space-3);
}
.detail-card p {
  font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.7;
  margin-bottom: var(--space-4);
}
.detail-card ul {
  list-style: none; padding: 0; margin: 0 0 var(--space-4);
}
.detail-card ul li {
  font-size: var(--text-base); color: var(--color-text); line-height: 1.7;
  padding: var(--space-2) 0; border-bottom: 1px solid var(--color-divider);
  display: flex; align-items: flex-start; gap: var(--space-3);
}
.detail-card ul li:last-child { border-bottom: none; }
.detail-card ul li svg { width: 18px; height: 18px; color: var(--color-red); flex-shrink: 0; margin-top: 4px; }

/* ========================================
   BOOK PAGE
   ======================================== */
.book-hero {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: center;
}
.book-cover {
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); aspect-ratio: 2/3; display: flex;
  align-items: center; justify-content: center; text-align: center;
  padding: var(--space-8); color: var(--color-text-faint); font-size: var(--text-sm);
}
.book-cover img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg); }
@media (max-width: 768px) { .book-hero { grid-template-columns: 1fr; } .book-cover { max-width: 320px; margin-inline: auto; } }

/* ========================================
   CERT GRID
   ======================================== */
.cert-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: var(--space-6);
}
.cert-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.cert-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-red); }
.cert-card h3 {
  font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-heading); margin-bottom: var(--space-2);
}
.cert-card p { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.65; }
.cert-badge {
  display: inline-flex; align-items: center; gap: var(--space-2); margin-top: var(--space-3);
  font-size: var(--text-xs); font-weight: 700; color: var(--color-red);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.cert-badge svg { width: 16px; height: 16px; }

/* ========================================
   SPEAKING TOPICS
   ======================================== */
.topic-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: var(--space-6);
}
.topic-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  border-left: 4px solid var(--color-red);
  transition: box-shadow var(--transition-interactive);
}
.topic-card:hover { box-shadow: var(--shadow-md); }
.topic-card h3 {
  font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-heading); margin-bottom: var(--space-2);
}
.topic-card p { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.65; }

/* Active nav state */
.nav-links a.active { color: var(--color-heading); font-weight: 700; }
.footer-copy { font-size: var(--text-xs); color: var(--color-text-muted); }
.footer-links { display: flex; gap: var(--space-4); }
.footer-links a {
  font-size: var(--text-xs); color: var(--color-text-muted); text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-links a:hover { color: var(--color-heading); }

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */
.fade-in { opacity: 1; }
@supports (animation-timeline: scroll()) {
  .fade-in { opacity: 0; animation: reveal-fade linear both; animation-timeline: view(); animation-range: entry 0% entry 100%; }
}
@keyframes reveal-fade { to { opacity: 1; } }

/* ========================================
   GLOBAL LINKS
   ======================================== */
a { color: var(--color-red); text-decoration: none; transition: color var(--transition-interactive); }
a:hover { color: var(--color-red-hover); }