/* ============================================
   INSIGHT HEALTH ANALYTICS — Design Tokens
   ============================================ */

:root {
  /* Type Scale */
  --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);

  /* Spacing (4px base) */
  --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 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

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

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
}

/* ============================================
   IHA Colour Palette — Deep Navy + Teal Accent
   Derived from logo (#1B3A5C deep navy)
   ============================================ */

:root, [data-theme="light"] {
  /* Surfaces */
  --color-bg:             #f5f7fa;
  --color-surface:        #ffffff;
  --color-surface-2:      #f0f3f7;
  --color-surface-offset: #e8ecf2;
  --color-surface-dynamic: #dce2eb;
  --color-divider:        #d0d7e2;
  --color-border:         #c2cbd8;

  /* Text */
  --color-text:           #1a1f2e;
  --color-text-muted:     #5a6478;
  --color-text-faint:     #9aa3b4;
  --color-text-inverse:   #f5f7fa;

  /* Primary — Deep Navy from logo */
  --color-primary:        #1B3A5C;
  --color-primary-hover:  #142d48;
  --color-primary-active: #0e2035;
  --color-primary-light:  #e6edf5;

  /* Accent — Teal/Cyan for CTAs and highlights */
  --color-accent:         #0891b2;
  --color-accent-hover:   #0e7490;
  --color-accent-active:  #155e75;
  --color-accent-light:   #e0f7fa;

  /* Success */
  --color-success:        #16a34a;

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 240 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.02 240 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.02 240 / 0.12);
}

/* Dark Mode */
[data-theme="dark"] {
  --color-bg:             #0f1419;
  --color-surface:        #161c24;
  --color-surface-2:      #1c242e;
  --color-surface-offset: #1a2230;
  --color-surface-dynamic: #243040;
  --color-divider:        #2a3544;
  --color-border:         #354258;

  --color-text:           #d4dae4;
  --color-text-muted:     #8896a8;
  --color-text-faint:     #556070;
  --color-text-inverse:   #1a1f2e;

  --color-primary:        #6ba3d6;
  --color-primary-hover:  #5590c4;
  --color-primary-active: #4280b4;
  --color-primary-light:  #1a2a3d;

  --color-accent:         #22d3ee;
  --color-accent-hover:   #06b6d4;
  --color-accent-active:  #0891b2;
  --color-accent-light:   #0e2a30;

  --color-success:        #4ade80;

  --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);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0f1419;
    --color-surface:        #161c24;
    --color-surface-2:      #1c242e;
    --color-surface-offset: #1a2230;
    --color-surface-dynamic: #243040;
    --color-divider:        #2a3544;
    --color-border:         #354258;
    --color-text:           #d4dae4;
    --color-text-muted:     #8896a8;
    --color-text-faint:     #556070;
    --color-text-inverse:   #1a1f2e;
    --color-primary:        #6ba3d6;
    --color-primary-hover:  #5590c4;
    --color-primary-active: #4280b4;
    --color-primary-light:  #1a2a3d;
    --color-accent:         #22d3ee;
    --color-accent-hover:   #06b6d4;
    --color-accent-active:  #0891b2;
    --color-accent-light:   #0e2a30;
    --color-success:        #4ade80;
    --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
   ============================================ */

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

.container--narrow {
  max-width: var(--content-default);
}

/* --- Header / Nav --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.08);
  transition: box-shadow 0.3s var(--ease-out);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo img {
  height: 44px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
  letter-spacing: 0.01em;
}

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

.nav a.active {
  color: var(--color-primary);
}

.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-text);
  background: var(--color-surface-offset);
}

/* Mobile nav */
.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-4);
    box-shadow: var(--shadow-md);
  }
}

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

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid oklch(from var(--color-text) l c h / 0.15);
}

.btn--secondary:hover {
  background: var(--color-surface-offset);
  border-color: oklch(from var(--color-text) l c h / 0.25);
}

.btn--large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* --- Hero --- */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
  overflow: hidden;
}

.hero__content {
  position: relative;
  z-index: 2;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: 18ch;
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

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

.section--alt {
  background: var(--color-surface-2);
}

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

.section__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.section__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 60ch;
}

/* --- Service Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

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

.service-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);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.service-card__icon svg {
  width: 28px;
  height: 28px;
  stroke-width: 1.5;
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.service-card__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --- Stat Grid --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}

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

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* --- Feature Row --- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}

.feature-row--reverse {
  direction: rtl;
}

.feature-row--reverse > * {
  direction: ltr;
}

@media (max-width: 768px) {
  .feature-row,
  .feature-row--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
}

.feature-row__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-offset);
  aspect-ratio: 4/3;
}

.feature-row__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-row__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* --- Testimonials --- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .testimonial-grid {
    grid-template-columns: 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-6);
}

.testimonial-card__quote {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: var(--space-4);
}

.testimonial-card__author {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.testimonial-card__role {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 4vw, var(--space-16));
  text-align: center;
}

.cta-banner__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.cta-banner__desc {
  font-size: var(--text-base);
  opacity: 0.85;
  max-width: 48ch;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.cta-banner .btn--primary {
  background: var(--color-accent);
  color: #fff;
}

/* --- Footer --- */
.footer {
  background: var(--color-surface-2);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.08);
  padding-block: var(--space-12);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__brand img {
  height: 36px;
  width: auto;
}

.footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 32ch;
}

.footer__col-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

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

.footer__bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__bottom a {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__bottom a:hover {
  color: var(--color-text-muted);
}

/* --- About Page --- */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}

@media (max-width: 768px) {
  .about-hero {
    grid-template-columns: 1fr;
  }
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

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

.value-card {
  padding: var(--space-6);
}

.value-card__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.3;
  margin-bottom: var(--space-3);
}

.value-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.value-card__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --- Services Detail Page --- */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
  padding-block: var(--space-8);
}

.service-detail + .service-detail {
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.06);
}

@media (max-width: 768px) {
  .service-detail {
    grid-template-columns: 1fr;
  }
}

.service-detail__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.service-detail__number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.service-detail__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
}

.service-detail__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.service-detail__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.service-detail__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

.service-detail__list li svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  margin-top: 2px;
}

.service-detail__visual {
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  overflow: hidden;
}

.service-detail__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.contact-item__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.contact-item__icon svg {
  width: 20px;
  height: 20px;
}

.contact-item__label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.contact-item__value {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.contact-item__value a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-item__value a:hover {
  text-decoration: underline;
}

.contact-form {
  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);
}

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

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  background: var(--color-bg);
  border: 1px solid oklch(from var(--color-text) l c h / 0.12);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px oklch(from var(--color-accent) l c h / 0.15);
}

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

/* --- 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; }
}

/* --- Process Steps --- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

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

.process-step {
  text-align: center;
  padding: var(--space-6);
}

.process-step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
}

.process-step__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.process-step__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Neural Network Decoration --- */
.neural-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.neural-bg svg {
  position: absolute;
  top: 50%;
  right: -5%;
  transform: translateY(-50%);
  width: 50%;
  height: auto;
  opacity: 0.06;
}

[data-theme="dark"] .neural-bg svg {
  opacity: 0.04;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 999;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-2);
}