/* ============================================
   PREMIER SPINE CARE — Design Tokens & Styles
   Medical Practice / Authoritative / Trustworthy
   ============================================ */

: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);

  /* Spacing */
  --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;

  /* Colors — Navy Indigo + Warm Gold */
  --color-bg:              #F8F7F4;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #F3F2EE;
  --color-surface-offset:  #ECEAE4;
  --color-divider:         #DDD9D1;
  --color-border:          #CCC8BF;
  --color-text:            #1C1B2E;
  --color-text-muted:      #5A586E;
  --color-text-faint:      #9694A5;
  --color-primary:         #0E3667;
  --color-primary-hover:   #0A2A52;
  --color-primary-active:  #071E3D;
  --color-primary-light:   #EEEDF5;
  --color-accent:          #B8922F;
  --color-accent-hover:    #9A7A24;
  --color-accent-light:    #F7F2E4;

  /* Fonts */
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  /* 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);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26,35,50,0.06);
  --shadow-md: 0 4px 16px rgba(26,35,50,0.08);
  --shadow-lg: 0 12px 40px rgba(26,35,50,0.12);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}


/* ============================================
   Layout
   ============================================ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

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

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

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

.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.section-header .section-desc {
  margin-inline: auto;
}


/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-6);
  transition: all var(--transition-interactive);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border: 1px solid var(--color-primary);
}

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

.btn--accent {
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}

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

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background: var(--color-surface-2);
  border-color: var(--color-text-muted);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

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


/* ============================================
   Header
   ============================================ */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 247, 244, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-slow);
}

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

.header__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.header__logo-img {
  height: 72px;
  width: auto;
  object-fit: contain;
}

.header__nav {
  margin-left: auto;
}

.header__nav-list {
  display: flex;
  gap: var(--space-1);
}

.header__nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-interactive);
}

.header__nav-link:hover,
.header__nav-link.active {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  flex-shrink: 0;
  transition: all var(--transition-interactive);
}

.header__cta:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

.header__menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.header__menu-icon,
.header__menu-icon::before,
.header__menu-icon::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.header__menu-icon {
  position: relative;
}

.header__menu-icon::before,
.header__menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.header__menu-icon::before { top: -7px; }
.header__menu-icon::after { top: 7px; }

/* Mobile menu open state */
.header__menu-btn[aria-expanded="true"] .header__menu-icon {
  background: transparent;
}
.header__menu-btn[aria-expanded="true"] .header__menu-icon::before {
  top: 0;
  transform: rotate(45deg);
}
.header__menu-btn[aria-expanded="true"] .header__menu-icon::after {
  top: 0;
  transform: rotate(-45deg);
}


/* ============================================
   Hero
   ============================================ */

.hero {
  position: relative;
  min-height: min(85vh, 700px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(14,54,103,0.06) 0%, transparent 70%),
    linear-gradient(180deg, #EEEDF5 0%, var(--color-surface) 50%, var(--color-accent-light) 100%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border: 1px solid rgba(184, 146, 47, 0.2);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
  justify-content: center;
}

.hero__stats {
  display: flex;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
}

.hero__stat {
  display: flex;
  flex-direction: column;
}

.hero__stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-accent);
}

.hero__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}




/* Hero spine graphic */
.hero__spine-graphic {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
  opacity: 0.5;
}

.hero__spine-graphic img {
  height: min(85vh, 650px);
  width: auto;
}


/* ============================================
   About
   ============================================ */

.about {
  position: relative;
  padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
  overflow: hidden;
}

.about__spine-bg {
  position: absolute;
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  opacity: 0.6;
}

.about__spine-bg img {
  height: 600px;
  width: auto;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
  align-items: start;
}

.about__content .section-title {
  max-width: 20ch;
}

.about__content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.about__highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.highlight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-slow);
}

.highlight-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.highlight-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.highlight-card__title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.highlight-card__text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}


/* ============================================
   Surgeons
   ============================================ */

.surgeons {
  position: relative;
  padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
  background: var(--color-surface-2);
  overflow: hidden;
}

.surgeons__spine-bg {
  position: absolute;
  left: -80px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  opacity: 0.4;
}

.surgeons__spine-bg img {
  height: 700px;
  width: auto;
}

.surgeons__grid {
  display: flex;
  flex-direction: column;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
}

.surgeon-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-12));
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: box-shadow var(--transition-slow);
}

.surgeon-card:hover {
  box-shadow: var(--shadow-lg);
}

.surgeon-card__image {
  overflow: hidden;
  background: var(--color-surface-offset);
}

.surgeon-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.surgeon-card__content {
  padding: var(--space-8) var(--space-8) var(--space-8) 0;
}

.surgeon-card__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.surgeon-card__specialty {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.surgeon-card__bio {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.surgeon-card__credentials {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.surgeon-card__credentials li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.surgeon-card__credentials li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-light);
  border: 2px solid var(--color-accent);
}


/* ============================================
   Services
   ============================================ */

.services {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
}

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

.service-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  overflow: hidden;
  transition: all var(--transition-slow);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.service-card__icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  overflow: hidden;
}

.service-card__spine-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 6px;
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.service-card__list li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}


/* Gold accent line under service card on hover */
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  transform: scaleX(0);
  transition: transform var(--transition-slow);
}

.service-card:hover::after {
  transform: scaleX(1);
}


/* ============================================
   Forms
   ============================================ */

.forms {
  padding: clamp(var(--space-12), 6vw, var(--space-20)) 0;
  background: linear-gradient(135deg, #0E3667 0%, #0A2A52 60%, #071E3D 100%);
}

.forms__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}

.forms__content .section-label {
  color: rgba(255,255,255,0.6);
}

.forms__content .section-title {
  color: #fff;
}

.forms__content p {
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
}

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

.form-download {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: #fff;
  transition: all var(--transition-interactive);
}

.form-download:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.35);
  transform: translateX(4px);
}

.form-download__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.form-download__name {
  font-weight: 600;
  font-size: var(--text-sm);
}

.form-download__meta {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.6);
}

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


/* ============================================
   Contact
   ============================================ */

.contact {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) 0;
  background: var(--color-surface-2);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-6);
}

.contact__info,
.contact__location {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.contact__info-block {
  margin-bottom: var(--space-6);
}

.contact__info-block:last-child {
  margin-bottom: 0;
}

.contact__info-block h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  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);
  margin-bottom: var(--space-2);
  line-height: 1.6;
}

.contact__info-block a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact__info-block a:hover {
  text-decoration: underline;
}

.contact__location-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border: 1px solid rgba(184, 146, 47, 0.15);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.contact__location address {
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

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


/* ============================================
   Footer
   ============================================ */

.footer {
  padding: var(--space-12) 0 var(--space-8);
  background: #0A1E38;
  color: rgba(255,255,255,0.7);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: #fff;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__links a:hover {
  color: #fff;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer__bottom p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

.footer__attribution {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
  text-decoration: none;
}

.footer__attribution:hover {
  color: rgba(255,255,255,0.6);
}


/* ============================================
   Scroll Reveal Animations
   ============================================ */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================
   Responsive — Tablet
   ============================================ */

@media (max-width: 960px) {
  .header__nav { display: none; }
  .header__cta span { display: none; }
  .header__cta { padding: var(--space-2); border: none; }
  .header__menu-btn { display: flex; }

  /* Mobile nav */
  .header__nav.nav--open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    box-shadow: var(--shadow-lg);
    padding: var(--space-4) var(--space-6);
  }

  .header__nav.nav--open .header__nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .header__nav.nav--open .header__nav-link {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    border-radius: var(--radius-md);
  }

  .hero { min-height: auto; }
  .hero__spine-graphic { opacity: 0.25; right: -5%; }
  .about__spine-bg { display: none; }
  .surgeons__spine-bg { display: none; }

  .about__grid {
    grid-template-columns: 1fr;
  }

  .surgeon-card {
    grid-template-columns: 240px 1fr;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .forms__inner {
    grid-template-columns: 1fr;
  }

  .contact__grid {
    grid-template-columns: 1fr;
  }
}


/* ============================================
   Responsive — Mobile
   ============================================ */

@media (max-width: 640px) {
  .hero__spine-graphic { display: none; }

  .hero__stats {
    flex-direction: column;
    gap: var(--space-4);
  }

  .hero__stat {
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-2);
  }

  .surgeon-card {
    grid-template-columns: 1fr;
  }

  .surgeon-card__image {
    height: 280px;
  }

  .surgeon-card__content {
    padding: var(--space-6);
  }

  .about__highlights {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    justify-content: center;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}