/* ============================================
   STYLE.CSS — Design Tokens + Component Styles
   Dr. Irena Ateljević — Premium Editorial Site
   Font pairing: Cormorant (display) + Manrope (body)
   Primary: Deep Teal #1A5653 | Gold accent: #C9A84C
   ============================================ */

/* ---- Type Scale (fluid) ---- */
: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,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);
}

/* ---- 4px Spacing System ---- */
:root {
  --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;
}

/* ---- Font Families ---- */
:root {
  --font-display: 'Cormorant', 'Georgia', serif;
  --font-body: 'Manrope', 'Helvetica Neue', sans-serif;
}

/* ---- Content Widths ---- */
:root {
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ---- Radius ---- */
:root {
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
}

/* ---- Transitions ---- */
:root {
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   LIGHT MODE (Default)
   Customized Nexus: Deep Teal Primary + Gold Accent
   ============================================ */
:root, [data-theme="light"] {
  /* Surfaces (Nexus Beige) */
  --color-bg:             #f7f6f2;
  --color-surface:        #f9f8f5;
  --color-surface-2:      #fbfbf9;
  --color-surface-offset: #f3f0ec;
  --color-surface-offset-2: #edeae5;
  --color-surface-dynamic: #e6e4df;
  --color-divider:        #dcd9d5;
  --color-border:         #d4d1ca;

  /* Text (Sylph Gray) */
  --color-text:           #28251d;
  --color-text-muted:     #7a7974;
  --color-text-faint:     #bab9b4;
  --color-text-inverse:   #f9f8f4;

  /* Primary Accent (Deep Teal) */
  --color-primary:        #1A5653;
  --color-primary-hover:  #134240;
  --color-primary-active: #0d302e;
  --color-primary-highlight: #d0dedd;

  /* Gold Accent */
  --color-gold:           #C9A84C;
  --color-gold-hover:     #b5943b;
  --color-gold-active:    #9a7d2e;
  --color-gold-highlight: #ede5cc;

  /* Semantic: Success (Gridania Green) */
  --color-success:        #437a22;
  --color-success-hover:  #2e5c10;
  --color-success-active: #1e3f0a;
  --color-success-highlight: #d4dfcc;

  /* Semantic: Error (Jenova Maroon) */
  --color-error:          #a12c7b;
  --color-error-hover:    #7d1e5e;
  --color-error-active:   #561740;
  --color-error-highlight: #e0ced7;

  /* Semantic: Warning (Terra Brown) */
  --color-warning:        #964219;
  --color-warning-hover:  #713417;
  --color-warning-active: #4b2614;
  --color-warning-highlight: #ddcfc6;

  /* Shadows (tone-matched warm) */
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

/* ============================================
   DARK MODE
   ============================================ */
[data-theme="dark"] {
  /* Surfaces (Nexus Umbra Beige) */
  --color-bg:             #171614;
  --color-surface:        #1c1b19;
  --color-surface-2:      #201f1d;
  --color-surface-offset: #1d1c1a;
  --color-surface-offset-2: #22211f;
  --color-surface-dynamic: #2d2c2a;
  --color-divider:        #262523;
  --color-border:         #393836;

  /* Text (Sylph Gray — Dark) */
  --color-text:           #cdccca;
  --color-text-muted:     #797876;
  --color-text-faint:     #5a5957;
  --color-text-inverse:   #2b2a28;

  /* Primary Accent (Deep Teal — Dark) */
  --color-primary:        #5ba8a4;
  --color-primary-hover:  #3d8e89;
  --color-primary-active: #2a7571;
  --color-primary-highlight: #2b3b3a;

  /* Gold Accent (Dark) */
  --color-gold:           #dfc06a;
  --color-gold-hover:     #c9a84c;
  --color-gold-active:    #b59438;
  --color-gold-highlight: #3d3828;

  /* Semantic: Success (Dark) */
  --color-success:        #6daa45;
  --color-success-hover:  #4d8f25;
  --color-success-active: #387015;
  --color-success-highlight: #3a4435;

  /* Semantic: Error (Dark) */
  --color-error:          #d163a7;
  --color-error-hover:    #b9478f;
  --color-error-active:   #9b2f76;
  --color-error-highlight: #4c3d46;

  /* Semantic: Warning (Dark) */
  --color-warning:        #bb653b;
  --color-warning-hover:  #b95525;
  --color-warning-active: #993d10;
  --color-warning-highlight: #564942;

  /* Shadows (softened for dark) */
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #171614;
    --color-surface:        #1c1b19;
    --color-surface-2:      #201f1d;
    --color-surface-offset: #1d1c1a;
    --color-surface-offset-2: #22211f;
    --color-surface-dynamic: #2d2c2a;
    --color-divider:        #262523;
    --color-border:         #393836;
    --color-text:           #cdccca;
    --color-text-muted:     #797876;
    --color-text-faint:     #5a5957;
    --color-text-inverse:   #2b2a28;
    --color-primary:        #5ba8a4;
    --color-primary-hover:  #3d8e89;
    --color-primary-active: #2a7571;
    --color-primary-highlight: #2b3b3a;
    --color-gold:           #dfc06a;
    --color-gold-hover:     #c9a84c;
    --color-gold-active:    #b59438;
    --color-gold-highlight: #3d3828;
    --color-success:        #6daa45;
    --color-success-hover:  #4d8f25;
    --color-success-active: #387015;
    --color-success-highlight: #3a4435;
    --color-error:          #d163a7;
    --color-error-hover:    #b9478f;
    --color-error-active:   #9b2f76;
    --color-error-highlight: #4c3d46;
    --color-warning:        #bb653b;
    --color-warning-hover:  #b95525;
    --color-warning-active: #993d10;
    --color-warning-highlight: #564942;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

/* ============================================
   COMPONENT STYLES
   ============================================ */

/* ---- Global ---- */
body {
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---- Skip to content ---- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  z-index: 1000;
  font-size: var(--text-sm);
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-2);
}

/* ---- Header / Nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
  padding: var(--space-3) var(--space-4);
}

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

.nav-brand {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
  letter-spacing: 0.02em;
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    flex-direction: column;
    padding: var(--space-6) var(--space-4);
    gap: var(--space-4);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    font-size: var(--text-base);
    padding: var(--space-2) 0;
  }
}

/* ---- Container Utility ---- */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* ---- Section Spacing ---- */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-32));
}

.section-header {
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ---- Hero Section ---- */
.hero {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-12);
  }
}

.hero-overline {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}

.hero-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 56ch;
  margin-bottom: var(--space-8);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
  min-height: 44px;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-gold);
}
.btn-outline:hover {
  background: var(--color-gold-highlight);
  border-color: var(--color-gold-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-outline:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid transparent;
  padding: var(--space-2) var(--space-4);
}
.btn-ghost:hover {
  background: var(--color-primary-highlight);
}

/* ---- Credential Bar ---- */
.credential-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.credential-item {
  display: flex;
  flex-direction: column;
}

.credential-value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.credential-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ---- Hero Portrait Image ---- */
.hero-portrait-img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-xl);
  display: block;
}

.hero-portrait {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

/* ---- About Section Photo ---- */
.about-photo {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center 20%;
  border-radius: var(--radius-xl);
  display: block;
  overflow: hidden;
}

/* ---- Portrait Placeholder (fallback) ---- */
.portrait-placeholder {
  background: var(--color-surface-offset);
  border-radius: var(--radius-xl);
  aspect-ratio: 3 / 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--color-text-faint);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  max-width: 400px;
  margin-inline: auto;
}

.portrait-placeholder svg {
  width: 40px;
  height: 40px;
  opacity: 0.5;
}

.portrait-placeholder span {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ---- Social Proof Bar ---- */
.social-proof {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.logo-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  align-items: center;
}

.logo-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  white-space: nowrap;
  border: 1px solid oklch(from var(--color-text) l c h / 0.04);
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive),
              border-color var(--transition-interactive);
}

.card-icon {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  line-height: 1;
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.card-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive), gap var(--transition-interactive);
}
.card-link:hover {
  color: var(--color-primary-hover);
  gap: var(--space-2);
}

/* ---- Keynote Grid ---- */
.keynote-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .keynote-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto;
  }
  /* Use subgrid so icon / title / text rows align across all 3 cards */
  .keynote-grid > .card {
    display: grid;
    grid-template-rows: subgrid;
    grid-row: span 3;
  }
  .keynote-grid > .card .card-icon {
    align-self: start;
  }
  .keynote-grid > .card .card-title {
    align-self: end;
  }
  .keynote-grid > .card .card-text {
    align-self: start;
  }
}

/* ---- Engagement Grid ---- */
.engagement-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 600px) {
  .engagement-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---- Blockquote ---- */
.quote-block {
  margin-top: clamp(var(--space-8), 4vw, var(--space-16));
  padding: var(--space-8);
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-gold);
}

.quote-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.55;
  margin-bottom: var(--space-3);
  max-width: 65ch;
}

.quote-source {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ---- About Section ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 2fr 3fr;
    gap: var(--space-12);
  }
}

.about-grid > .fade-in:first-child {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.bio-text p {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  max-width: 65ch;
  opacity: 0.85;
}

.bio-text p:last-child {
  margin-bottom: 0;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  transition: background var(--transition-interactive),
              border-color var(--transition-interactive),
              transform var(--transition-interactive);
}
.project-link:hover {
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.project-link svg {
  width: 14px;
  height: 14px;
}

/* ---- Contact / Form ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  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-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-faint);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237a7974' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-success {
  display: none;
  padding: var(--space-4);
  background: var(--color-success-highlight);
  color: var(--color-success);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-top: var(--space-4);
}

.form-success.visible {
  display: block;
}

.alt-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.alt-cta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.alt-cta-item a {
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.alt-cta-item a:hover {
  color: var(--color-primary-hover);
}

.alt-cta-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ---- Contact sidebar ---- */
.contact-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact-info-block h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.contact-info-block p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---- Modal ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: oklch(0 0 0 / 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1);
  padding: var(--space-4);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 480px;
  width: 100%;
  position: relative;
  transform: scale(0.95);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.modal-close:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.modal-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.modal-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-6);
}

.modal-form {
  display: flex;
  gap: var(--space-3);
}

.modal-form .form-input {
  flex: 1;
}

.modal-success {
  display: none;
  padding: var(--space-3);
  background: var(--color-success-highlight);
  color: var(--color-success);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-top: var(--space-4);
}

.modal-success.visible {
  display: block;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) var(--space-4);
}

.footer-container {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer-copy {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.footer-social a:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.footer-contact {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.footer-contact a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-contact a:hover {
  color: var(--color-primary-hover);
}

.footer-credit {
  width: 100%;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}
.footer-credit a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-credit a:hover {
  color: var(--color-primary);
}

@media (max-width: 600px) {
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
}

/* ---- Scroll Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children inside grids */
.keynote-grid .fade-in:nth-child(2),
.engagement-grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.keynote-grid .fade-in:nth-child(3),
.engagement-grid .fade-in:nth-child(3) { transition-delay: 0.2s; }
.keynote-grid .fade-in:nth-child(4) { transition-delay: 0.05s; }
.keynote-grid .fade-in:nth-child(5) { transition-delay: 0.15s; }
.keynote-grid .fade-in:nth-child(6) { transition-delay: 0.25s; }
.engagement-grid .fade-in:nth-child(4) { transition-delay: 0.3s; }

/* Credential bar items stagger */
.credential-bar .credential-item:nth-child(2) { transition-delay: 0.08s; }
.credential-bar .credential-item:nth-child(3) { transition-delay: 0.16s; }

/* Logo chips stagger */
.logo-row .logo-chip { 
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.logo-row.is-visible .logo-chip { opacity: 1; transform: translateY(0); }
.logo-row .logo-chip:nth-child(1) { transition-delay: 0s; }
.logo-row .logo-chip:nth-child(2) { transition-delay: 0.05s; }
.logo-row .logo-chip:nth-child(3) { transition-delay: 0.1s; }
.logo-row .logo-chip:nth-child(4) { transition-delay: 0.15s; }
.logo-row .logo-chip:nth-child(5) { transition-delay: 0.2s; }
.logo-row .logo-chip:nth-child(6) { transition-delay: 0.25s; }

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .logo-row .logo-chip {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .fade-in.is-visible,
  .logo-row.is-visible .logo-chip {
    opacity: 1;
    transform: none;
  }
}

/* ---- Image Reveal ---- */
.hero-portrait-img,
.about-photo {
  opacity: 0;
  transform: scale(1.03);
  transition:
    opacity 1s cubic-bezier(0.16, 1, 0.3, 1),
    transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.is-visible .hero-portrait-img,
.is-visible .about-photo,
.fade-in.is-visible .hero-portrait-img,
.fade-in.is-visible .about-photo {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .hero-portrait-img,
  .about-photo {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---- Keynote description ---- */
.keynote-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 65ch;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}

/* ---- Engagement card top label ---- */
.card-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

/* ---- Responsive utility ---- */
@media (max-width: 768px) {
  .hero-grid {
    text-align: left;
  }
  .hero-portrait {
    order: -1;
  }
  .portrait-placeholder {
    max-width: 240px;
    aspect-ratio: 1 / 1;
  }
  .hero-title {
    font-size: var(--text-2xl);
  }
  .modal-form {
    flex-direction: column;
  }
  .modal-form .btn {
    width: 100%;
  }
  .engagement-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- Language Switcher ---- */
.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  height: 36px;
}

.lang-switch a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.lang-switch a:hover {
  color: var(--color-text);
}

.lang-active {
  color: var(--color-text);
  font-weight: 700;
}

.lang-sep {
  color: var(--color-text-faint);
  margin-inline: 2px;
}

/* ---- Case Studies Grid ---- */
.case-studies-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .case-studies-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.case-study-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: box-shadow var(--transition-interactive),
              border-color var(--transition-interactive);
}

.case-study-card:hover {
  border-color: oklch(from var(--color-primary) l c h / 0.25);
  box-shadow: var(--shadow-md);
}

/* Case study image with B&W to color hover */
.case-study-img-wrap {
  overflow: hidden;
  line-height: 0;
}

.case-study-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  filter: grayscale(100%);
  transition: filter 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.case-study-card:hover .case-study-img {
  filter: grayscale(0%);
  transform: scale(1.03);
}

.case-study-content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.case-study-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.case-study-tag {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: oklch(from var(--color-primary) l c h / 0.08);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.case-study-date {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
}

.case-study-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.25;
}

.case-study-location {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.case-study-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 65ch;
}

.case-study-content .card-link {
  margin-top: auto;
  padding-top: var(--space-2);
}

/* Case study stagger */
.case-studies-grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.case-studies-grid .fade-in:nth-child(3) { transition-delay: 0.2s; }
.case-studies-grid .fade-in:nth-child(4) { transition-delay: 0.3s; }

/* Mobile: case study images go color on scroll into view */
@media (max-width: 768px) {
  .case-study-card .case-study-img-wrap .case-study-img {
    filter: grayscale(100%) !important;
    transform: none !important;
  }
  .case-study-card.in-view .case-study-img-wrap .case-study-img {
    filter: grayscale(0%) !important;
    transform: none !important;
  }
}

/* ---- Testimonials Section ---- */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.testimonial-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: relative;
}

.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 4.5rem);
  line-height: 1;
  color: var(--color-gold);
  opacity: 0.25;
  pointer-events: none;
}

.testimonial-text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.7;
  max-width: 65ch;
  flex: 1;
}

.testimonial-footer {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.testimonial-avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.testimonial-initials {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.testimonial-name {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.testimonial-role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* Testimonial stagger */
.testimonials-grid .fade-in:nth-child(2) { transition-delay: 0.1s; }