/* ================================================================
   STYLES.CSS — RusiTech LLC
   Page-specific layouts: hero, stats, mission, services,
   why section, closing CTA, and all index.html sections
   ================================================================ */


/* ----------------------------------------------------------------
   HERO SECTION
---------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 100% 0%, rgba(26, 58, 92, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(26, 58, 92, 0.10) 0%, transparent 55%),
    radial-gradient(ellipse 100% 80% at 50% 0%, rgba(184, 134, 11, 0.06) 0%, transparent 50%),
    linear-gradient(165deg, #e8eef5 0%, #f0ede8 35%, #eceae4 70%, #e8e4dd 100%);
}

/* Hero Background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Engineering grid base */


.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 58, 92, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 58, 92, 0.09) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 80% at 60% 40%,
    black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 60% 40%,
    black 0%, transparent 100%);
  animation: grid-scroll 4.5s linear infinite;
  animation-play-state: running;
  will-change: background-position;
}

@keyframes grid-scroll {
  0%   { background-position: 0 0; }
  100% { background-position: 0 48px; }
}






/* Hero Content */
.hero-content {
  position: relative;
  z-index: 1;
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  max-width: 820px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xl);
  padding: 6px 14px;
  background: var(--color-accent-light);
  border-radius: 100px;
  border: 1px solid rgba(26, 58, 92, 0.15);
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(44px, 7vw, 88px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-xl);
}

.hero-headline em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--color-ink-60);
  line-height: 1.8;
  max-width: 580px;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

/* Hero Trust Bar */
.hero-trust {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule);
}

.trust-item {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-ink-60);
  text-transform: uppercase;
}

.trust-divider {
  color: var(--color-ink-30);
  font-size: 14px;
}

/* Hero Scroll Hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 56px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--color-ink-30) 40%,
    transparent
  );
  animation: scroll-pulse 2.4s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50%       { opacity: 1;   transform: scaleY(1); }
}


/* ----------------------------------------------------------------
   STATS SECTION
---------------------------------------------------------------- */
.stats-section {
  background: var(--color-paper-pure);
  border-top: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
  padding: var(--space-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}


/* ── Stats Knowledge Base Label ─────────────────────────────── */
.stats-label-row {
  text-align: center;
  padding-bottom: var(--space-xl);
}

.stats-knowledge-base {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 400;
  font-style: italic;
  color: var(--color-ink-60);
  letter-spacing: 0.02em;
}

/* ── HVACR Footnote ─────────────────────────────────────────── */
.hvacr-footnote {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-rule);
}

.hvacr-footnote p {
  font-size: 12px;
  color: var(--color-ink-30);
  letter-spacing: 0.04em;
}

/* ----------------------------------------------------------------
   MISSION SECTION
---------------------------------------------------------------- */
.mission-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper);
}

.mission-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  text-align: center;
  max-width: 780px;
  margin-inline: auto;
}

.mission-rule {
  width: 60px;
  height: 1px;
  background: var(--color-rule);
}

.mission-quote {
  font-family: var(--font-serif);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 300;
  font-style: italic;
  line-height: 1.6;
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

.mission-cite {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  font-style: normal;
}


/* ----------------------------------------------------------------
   SERVICES SECTION
---------------------------------------------------------------- */
.services-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-dark);
}

.section-header {
  margin-bottom: var(--space-2xl);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.services-cta {
  text-align: center;
}


/* ----------------------------------------------------------------
   WHY RUSITECH SECTION
---------------------------------------------------------------- */
.why-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-pure);
}

.why-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-3xl);
  align-items: start;
}

/* Why Text */
.why-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.why-text .section-sub {
  max-width: 100%;
}

/* Why List */
.why-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: var(--space-sm) 0;
}

.why-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.6;
}

.why-check {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent-light);
  border: 1px solid rgba(26, 58, 92, 0.25);
  margin-top: 2px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.why-check::after {
  content: '';
  display: block;
  width: 5px;
  height: 8px;
  border-right: 1.5px solid var(--color-accent);
  border-bottom: 1.5px solid var(--color-accent);
  transform: rotate(45deg) translate(-1px, -1px);
}

/* Why Credentials */
.why-credentials {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}


/* ----------------------------------------------------------------
   CLOSING CTA SECTION
---------------------------------------------------------------- */
.cta-section {
  padding: var(--space-4xl) 0;
  background: var(--color-accent);
  position: relative;
  overflow: hidden;
}

/* Subtle texture behind CTA */
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  max-width: 680px;
  margin-inline: auto;
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #fff;
}

.cta-sub {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  max-width: 480px;
}

/* CTA Button Override — white on dark bg */
.cta-section .btn-primary {
  background: #fff;
  color: var(--color-accent);
  border-color: #fff;
}

.cta-section .btn-primary:hover {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.cta-email {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}

.cta-email-link {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.cta-email-link:hover {
  color: #fff;
}


/* ----------------------------------------------------------------
   ABOUT PAGE — Hero
---------------------------------------------------------------- */
.page-hero {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule);
}

.page-hero-inner {
  max-width: 720px;
}

.page-hero-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.page-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-xl);
}

.page-hero-title em {
  font-style: italic;
  color: var(--color-accent);
}

.page-hero-sub {
  font-size: 18px;
  color: var(--color-ink-60);
  line-height: 1.75;
  max-width: 580px;
}


/* ----------------------------------------------------------------
   ABOUT PAGE — Bio Section
---------------------------------------------------------------- */
.bio-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-pure);
}

.bio-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  align-items: start;
}

.bio-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}

.bio-photo-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-paper-dark);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-30);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.bio-sidebar-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.bio-info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-rule-light);
}

.bio-info-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-30);
}

.bio-info-value {
  font-size: 14px;
  color: var(--color-ink-60);
  line-height: 1.5;
}

/* Bio Content */
.bio-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.bio-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.bio-block-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-rule);
}

.bio-block-title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 400;
  line-height: 1.3;
  color: var(--color-ink);
}

.bio-block p {
  font-size: 16px;
  color: var(--color-ink-60);
  line-height: 1.85;
}





/* ── Bio Photo ─────────────────────────────────────────────── */
.bio-photo-wrap {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-rule);
  box-shadow: 0 2px 12px rgba(14, 14, 14, 0.06);
}

.bio-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: grayscale(8%) contrast(1.02);
  transition: transform 0.7s ease, filter 0.7s ease;
}

.bio-photo:hover {
  transform: scale(1.015);
  filter: grayscale(0%) contrast(1.04);
}
/* ----------------------------------------------------------------
   CREDENTIALS SECTION (About Page)
---------------------------------------------------------------- */
.credentials-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-dark);
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.cred-card {
  background: var(--color-paper-pure);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.cred-card-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.cred-card-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.3;
}

.cred-card-sub {
  font-size: 13px;
  color: var(--color-ink-60);
}


/* ----------------------------------------------------------------
   SERVICES PAGE — Full Detail
---------------------------------------------------------------- */
.services-detail-section {
  padding: var(--space-3xl) 0;
}

.services-detail-section:nth-child(even) {
  background: var(--color-paper-dark);
}

.service-detail-block {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  align-items: start;
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-rule);
}

.service-detail-block:last-child {
  border-bottom: none;
}

.service-detail-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}

.service-detail-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.service-detail-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-ink);
}

.service-detail-desc {
  font-size: 16px;
  color: var(--color-ink-60);
  line-height: 1.85;
}

.service-detail-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.service-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.6;
  padding-left: var(--space-md);
  position: relative;
}

.service-detail-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}


/* ----------------------------------------------------------------
   PATENTS PAGE
---------------------------------------------------------------- */
.patents-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-pure);
}

.patents-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.patent-card {
  background: var(--color-paper-pure);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-lg);
  align-items: start;
  transition: box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.patent-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-ink-30);
}

.patent-number {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ink-30);
  writing-mode: vertical-lr;
  text-orientation: mixed;
  transform: rotate(180deg);
  white-space: nowrap;
}

.patent-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.patent-title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.3;
}

.patent-meta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.patent-meta-item {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-ink-60);
  text-transform: uppercase;
}

.patent-desc {
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.7;
  margin-top: var(--space-xs);
}

.patent-link {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
  white-space: nowrap;
  padding: 6px 14px;
  border: 1px solid rgba(26, 58, 92, 0.25);
  border-radius: var(--border-radius);
  transition: background var(--transition-fast),
              border-color var(--transition-fast);
}

.patent-link:hover {
  background: var(--color-accent-light);
}


/* ----------------------------------------------------------------
   CONTACT PAGE
---------------------------------------------------------------- */
.contact-section {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  background: var(--color-paper);
  min-height: 100svh;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}

.contact-info-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 300;
  line-height: 1.2;
  color: var(--color-ink);
}

.contact-info-title em {
  font-style: italic;
  color: var(--color-accent);
}

.contact-info-sub {
  font-size: 16px;
  color: var(--color-ink-60);
  line-height: 1.75;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule);
}

.contact-detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-detail-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-30);
}

.contact-detail-value {
  font-size: 15px;
  color: var(--color-ink-60);
}

.contact-detail-value a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.contact-detail-value a:hover {
  opacity: 0.7;
}

/* Contact Form */
.contact-form-wrap {
  background: var(--color-paper-pure);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.form-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-ink);
}

.form-label .required {
  color: var(--color-accent);
  margin-left: 2px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius);
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-ink);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-ink-30);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

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

.form-submit {
  width: 100%;
  padding: 15px;
  font-size: 14px;
  letter-spacing: 0.06em;
  margin-top: var(--space-sm);
}

.form-note {
  font-size: 12px;
  color: var(--color-ink-30);
  text-align: center;
  margin-top: var(--space-md);
}

/* Form Success State */
.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  text-align: center;
  padding: var(--space-2xl);
}

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

.form-success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent-light);
  border: 1px solid rgba(26, 58, 92, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.form-success-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  color: var(--color-ink);
}

.form-success-sub {
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.7;
}

/* Autosave Indicator */
.autosave-indicator {
  font-size: 12px;
  color: var(--color-ink-30);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.autosave-indicator.saved {
  color: #2d7a4f;
}

.autosave-indicator.restored {
  color: var(--color-accent);
}


/* ----------------------------------------------------------------
   PUBLICATIONS SECTION (Patents Page)
---------------------------------------------------------------- */
.publications-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-dark);
}

.publication-card {
  background: var(--color-paper-pure);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: box-shadow var(--transition-base);
}

.publication-card:hover {
  box-shadow: var(--shadow-sm);
}

.publication-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 4px 10px;
  border-radius: 100px;
  align-self: flex-start;
}

.publication-title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.35;
}

.publication-meta {
  font-size: 13px;
  color: var(--color-ink-30);
  letter-spacing: 0.04em;
}

.publication-desc {
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.7;
}

.publication-link {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
  align-self: flex-start;
  margin-top: var(--space-xs);
  transition: opacity var(--transition-fast);
}

.publication-link:hover {
  opacity: 0.7;
}


/* ----------------------------------------------------------------
   RESPONSIVE — HERO
---------------------------------------------------------------- */
@media (max-width: 768px) {
  .hero-content {
    padding-top: var(--space-xl);
  }

  .hero-trust {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .trust-divider {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-scroll-hint {
    display: none;
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — STATS
---------------------------------------------------------------- */
@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card:nth-child(2) {
    border-right: none;
  }

  .stat-card:nth-child(1),
  .stat-card:nth-child(2) {
    border-bottom: 1px solid var(--color-rule);
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — SERVICES GRID
---------------------------------------------------------------- */
@media (max-width: 960px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — WHY SECTION
---------------------------------------------------------------- */
@media (max-width: 900px) {
  .why-inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .why-credentials {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .why-credentials {
    grid-template-columns: 1fr;
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — CONTACT
---------------------------------------------------------------- */
@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-info {
    position: static;
  }

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


/* ----------------------------------------------------------------
   RESPONSIVE — BIO GRID
---------------------------------------------------------------- */
@media (max-width: 900px) {
  .bio-grid {
    grid-template-columns: 1fr;
  }

  .bio-sidebar {
    position: static;
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — CREDENTIALS GRID
---------------------------------------------------------------- */
@media (max-width: 768px) {
  .credentials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .credentials-grid {
    grid-template-columns: 1fr;
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — PATENT CARD
---------------------------------------------------------------- */
@media (max-width: 640px) {
  .patent-card {
    grid-template-columns: 1fr;
  }

  .patent-number {
    writing-mode: horizontal-tb;
    transform: none;
  }

  .patent-link {
    align-self: flex-start;
  }
}


/* ----------------------------------------------------------------
   RESPONSIVE — SERVICE DETAIL
---------------------------------------------------------------- */
@media (max-width: 768px) {
  .service-detail-block {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .service-detail-label {
    position: static;
  }
}










/* ----------------------------------------------------------------
   SERVICES PAGE — Subnav Bar
---------------------------------------------------------------- */
.services-subnav {
  background: var(--color-paper-pure);
  border-bottom: 1px solid var(--color-rule);
  position: sticky;
  top: var(--nav-height);
  z-index: 100;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.services-subnav-list {
  display: flex;
  align-items: center;
  gap: 0;
  white-space: nowrap;
  padding: 0;
}

.subnav-link {
  display: inline-block;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-ink-60);
  padding: 16px 20px;
  border-bottom: 2px solid transparent;
  text-decoration: none;
  transition: color var(--transition-fast),
              border-color var(--transition-fast);
  white-space: nowrap;
}

.subnav-link:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink-30);
}


/* ----------------------------------------------------------------
   SERVICES PAGE — Detail Number
---------------------------------------------------------------- */
.service-detail-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 300;
  color: var(--color-ink-10);
  line-height: 1;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.service-detail-cta {
  margin-top: var(--space-xl);
}


/* ----------------------------------------------------------------
   SERVICES PAGE — Engagement Process Grid
---------------------------------------------------------------- */
.engagement-section {
  padding: var(--space-3xl) 0;
  background: var(--color-paper-dark);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.process-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-xl);
  background: var(--color-paper-pure);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
}

.process-number {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.02em;
  opacity: 0.4;
}

.process-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.3;
}

.process-desc {
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.7;
}

@media (max-width: 900px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}







/* ----------------------------------------------------------------
   PATENTS PAGE — Stats Bar
---------------------------------------------------------------- */
.patent-stats {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  padding-top: var(--space-2xl);
  margin-top: var(--space-2xl);
  border-top: 1px solid var(--color-rule);
  flex-wrap: wrap;
}

.patent-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.patent-stat-number {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.patent-stat-label {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
}

.patent-stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-rule);
  flex-shrink: 0;
}

/* Grant / Application Badges */
.patent-meta-item--grant {
  color: #2d7a4f;
  background: #eaf5ee;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.patent-meta-item--application {
  color: #7a5a2d;
  background: #f5f0ea;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ----------------------------------------------------------------
   PUBLICATIONS PAGE — Grid
---------------------------------------------------------------- */
.publications-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

@media (max-width: 640px) {
  .patent-stats {
    gap: var(--space-xl);
  }

  .patent-stat-divider {
    display: none;
  }
}






/* ================================================================
   CONTACT PAGE — Multi-Step Form
   All styles specific to contact.html
   ================================================================ */

/* ── Page Layout ──────────────────────────────────────────────── */
.contact-page {
  min-height: 100svh;
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  background: var(--color-paper);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
  align-items: start;
}

/* ── Left Panel ───────────────────────────────────────────────── */
.contact-left {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.contact-left-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-top: var(--space-md);
  margin-bottom: var(--space-lg);
}

.contact-left-title em {
  font-style: italic;
  color: var(--color-accent);
}

.contact-left-sub {
  font-size: 16px;
  color: var(--color-ink-60);
  line-height: 1.75;
}

.contact-left-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule);
}

.contact-detail-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.contact-detail-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-30);
}

.contact-detail-value {
  font-size: 15px;
  color: var(--color-ink-60);
}

.contact-detail-value a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.contact-detail-value a:hover {
  opacity: 0.7;
}

/* Trust Signals */
.contact-trust {
  display: flex;
  gap: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule);
}

.contact-trust-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.contact-trust-number {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.contact-trust-label {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-30);
  line-height: 1.4;
}

/* ── Right Panel ──────────────────────────────────────────────── */
.contact-right {
  background: var(--color-paper-pure);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
}

/* ── Progress Bar ─────────────────────────────────────────────── */
.form-progress {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-rule);
}

.form-progress-steps {
  display: flex;
  align-items: center;
  gap: 0;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.progress-step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-ink-10);
  border: 1.5px solid var(--color-ink-30);
  transition: background var(--transition-base),
              border-color var(--transition-base);
  display: block;
}

.progress-step.active .progress-step-dot,
.progress-step.completed .progress-step-dot {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.progress-step-label {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-30);
  white-space: nowrap;
  transition: color var(--transition-base);
}

.progress-step.active .progress-step-label,
.progress-step.completed .progress-step-label {
  color: var(--color-accent);
}

.progress-step-line {
  flex: 1;
  height: 1px;
  background: var(--color-rule);
  margin-bottom: 20px;
  transition: background var(--transition-base);
}

.progress-step-line.active {
  background: var(--color-accent);
}

/* ── Step Header ──────────────────────────────────────────────── */
.step-header {
  margin-bottom: var(--space-xl);
}

.step-title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 400;
  color: var(--color-ink);
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

.step-sub {
  font-size: 15px;
  color: var(--color-ink-60);
  line-height: 1.65;
}

/* ── Form Steps ───────────────────────────────────────────────── */
.form-step {
  animation: step-in 0.3s ease forwards;
}

@keyframes step-in {
  from {
    opacity: 0;
    transform: translateX(12px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ── Inquiry Cards — Step 1 ───────────────────────────────────── */
.inquiry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.inquiry-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: border-color var(--transition-fast),
              background var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  user-select: none;
}

.inquiry-card:hover {
  border-color: var(--color-ink-30);
  background: var(--color-paper-pure);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.inquiry-card.selected {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.08);
}

.inquiry-card-icon {
  color: var(--color-accent);
  width: 40px;
  height: 40px;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.inquiry-card.selected .inquiry-card-icon {
  background: rgba(26, 58, 92, 0.15);
}

.inquiry-card-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.3;
}

.inquiry-card-desc {
  font-size: 13px;
  color: var(--color-ink-60);
  line-height: 1.55;
}

/* ── Contact Preference ───────────────────────────────────────── */
.contact-pref-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.pref-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 15px;
  color: var(--color-ink-60);
  cursor: pointer;
  padding: 10px 16px;
  border: 1px solid var(--color-rule);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast),
              background var(--transition-fast);
}

.pref-option:has(input:checked) {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.pref-option input {
  accent-color: var(--color-accent);
}

/* ── Review Summary ───────────────────────────────────────────── */
.review-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent-light);
  border: 1px solid rgba(26, 58, 92, 0.15);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-xl);
}

.review-summary-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.review-summary-type {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

/* ── Step Actions ─────────────────────────────────────────────── */
.step-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule);
}

/* ── Step Error ───────────────────────────────────────────────── */
.step-error {
  font-size: 13px;
  color: #c0392b;
  min-height: 20px;
  margin-top: var(--space-sm);
}

/* ── Form Note ────────────────────────────────────────────────── */
.form-note {
  font-size: 12px;
  color: var(--color-ink-30);
  text-align: center;
  margin-top: var(--space-md);
  line-height: 1.6;
}

/* ── Success State ────────────────────────────────────────────── */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
}

.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-accent-light);
  border: 1px solid rgba(26, 58, 92, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.success-title {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 300;
  color: var(--color-ink);
}

.success-sub {
  font-size: 16px;
  color: var(--color-ink-60);
  line-height: 1.75;
  max-width: 400px;
}

.success-email {
  font-size: 13px;
  color: var(--color-ink-30);
}




/* Success replaces form — never stacks below it */
.form-success[hidden] {
  display: none !important;
}

.form-success:not([hidden]) {
  display: flex;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 960px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .contact-left {
    position: static;
  }

  .contact-trust {
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  .inquiry-grid {
    grid-template-columns: 1fr;
  }

  .contact-right {
    padding: var(--space-xl) var(--space-lg);
  }

  .step-actions {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .step-actions .btn {
    width: 100%;
    justify-content: center;
  }
}