/* ============================================================
   APEX Health Supply — main.css
   Global: variables, reset, typography, layout, nav, footer, buttons
   ============================================================ */

/* ── 1. CSS Custom Properties ── */
:root {
  /* Brand Colors */
  --color-navy:        #0B1D35;
  --color-navy-mid:    #142D52;
  --color-navy-dark:   #07121F;
  --color-teal:        #0E8C8C;
  --color-teal-light:  #16B8B8;
  --color-teal-xlight: #E0F7F7;
  --color-green:       #2ECC8F;
  --color-green-dark:  #22A874;
  --color-gold:        #C4A135;
  --color-gold-light:  #E8C55A;
  --color-blue-accent: #4A8FCC;

  /* Neutrals */
  --color-white:       #FFFFFF;
  --color-off-white:   #F5F7FA;
  --color-bg-alt:      #EEF2F8;
  --color-light-gray:  #E2E8F0;
  --color-mid-gray:    #8A96A8;
  --color-dark-gray:   #2D3748;
  --color-charcoal:    #1A202C;

  /* Semantic */
  --color-cta:         #0E8C8C;
  --color-cta-hover:   #0B7070;
  --color-link:        #0E8C8C;

  /* Typography */
  --font-base:    'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  --font-hero:    'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.5rem;
  --text-5xl:  3.25rem;
  --text-6xl:  4rem;

  /* 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;

  /* Misc */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.06);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.14), 0 4px 12px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 12px rgba(11,37,69,0.08);

  --nav-height: 72px;
  --transition: 0.25s ease;
}

/* ── 2. Modern CSS Reset ── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-dark-gray);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video, svg { display: block; max-width: 100%; }
img { height: auto; }

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-teal-light); }

ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-charcoal);
  margin: 0 0 var(--space-4);
}

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

button { font-family: var(--font-base); cursor: pointer; border: none; background: none; }

input, select, textarea {
  font-family: var(--font-base);
  font-size: var(--text-base);
}

/* ── 3. Layout Utilities ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--space-8); }
}

.section {
  padding: var(--space-20) 0;
}

.section--sm { padding: var(--space-12) 0; }
.section--lg { padding: var(--space-24) 0; }

.section--white  { background: var(--color-white); }
.section--alt    { background: var(--color-off-white); }
.section--bg     { background: var(--color-bg-alt); }
.section--navy   { background: var(--color-navy); }
.section--navy-mid { background: var(--color-navy-mid); }
.section--teal   { background: var(--color-teal); }

.section--navy h1, .section--navy h2, .section--navy h3,
.section--navy h4, .section--navy p, .section--navy li,
.section--navy-mid h1, .section--navy-mid h2, .section--navy-mid h3,
.section--navy-mid p { color: var(--color-white); }

.grid-2 { display: grid; gap: var(--space-8); }
.grid-3 { display: grid; gap: var(--space-6); }
.grid-4 { display: grid; gap: var(--space-6); }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.text-center { text-align: center; }
.text-white  { color: var(--color-white) !important; }
.text-teal   { color: var(--color-teal) !important; }
.text-green  { color: var(--color-green) !important; }
.text-gold   { color: var(--color-gold) !important; }

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-3);
}

.section-heading {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: var(--space-4);
}

.section-heading--lg {
  font-size: var(--text-4xl);
}

.section-sub {
  font-size: var(--text-lg);
  color: var(--color-mid-gray);
  max-width: 640px;
  line-height: 1.7;
}

.section-intro {
  max-width: 720px;
  margin: 0 auto var(--space-12);
  text-align: center;
}

/* ── 4. Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-teal);
  color: var(--color-white);
  border-color: var(--color-teal);
}
.btn--primary:hover {
  background: var(--color-cta-hover);
  border-color: var(--color-cta-hover);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(14,140,140,0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-teal);
  border-color: var(--color-teal);
}
.btn--outline:hover {
  background: var(--color-teal);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.7);
}
.btn--outline-white:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-teal);
  padding: 0;
  border-radius: 0;
  border: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.btn--ghost:hover {
  color: var(--color-teal-light);
  gap: var(--space-3);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
}

/* ── 5. Page Hero ── */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy) 60%, var(--color-navy-mid) 100%);
  padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-16);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    url('../assets/images/network-bg.svg') right center / 65% auto no-repeat,
    radial-gradient(ellipse at 75% 50%, rgba(74,143,204,0.12) 0%, transparent 60%);
  pointer-events: none;
  opacity: 1;
}

.page-hero--home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--nav-height) 0 0;
}

.page-hero__content {
  position: relative;
  z-index: 1;
}

.page-hero__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal-light);
  margin-bottom: var(--space-4);
}

.page-hero__title {
  font-family: var(--font-hero);
  font-size: clamp(2rem, 5vw, var(--text-5xl));
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: var(--space-6);
  max-width: 800px;
}

.page-hero__title span {
  color: var(--color-teal-light);
}

.page-hero__sub {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.80);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

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

.page-hero__breadcrumb {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-6);
}
.page-hero__breadcrumb a { color: rgba(255,255,255,0.6); }
.page-hero__breadcrumb a:hover { color: var(--color-teal-light); }
.page-hero__breadcrumb span { color: rgba(255,255,255,0.8); }

/* Hero decorative wave */
.page-hero__wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  line-height: 0;
}

/* ── 6. Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.nav--transparent { background: transparent; }

.nav--scrolled {
  background: var(--color-navy);
  box-shadow: 0 2px 20px rgba(0,0,0,0.25);
}

.nav__container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .nav__container { padding: 0 var(--space-8); }
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img { height: 40px; width: auto; }

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.1;
}

.nav__logo-text span {
  display: block;
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.65);
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 900px) {
  .nav__links { display: flex; }
}

.nav__link {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.80);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background: var(--color-teal-light);
  transform: scaleX(0);
  transition: transform var(--transition);
  border-radius: 1px;
}

.nav__link:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

.nav__link:hover::after,
.nav__link--active::after {
  transform: scaleX(1);
}

.nav__link--active {
  color: var(--color-teal-light);
}

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

.nav__cta {
  display: none;
}

@media (min-width: 900px) {
  .nav__cta { display: inline-flex; }
}

/* Hamburger */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  background: none;
  border: none;
}

@media (min-width: 900px) {
  .nav__hamburger { display: none; }
}

.nav__hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition);
  transform-origin: center;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}
.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.nav__mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-navy);
  padding: var(--space-4) var(--space-6) var(--space-6);
  transform: translateY(-110%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  z-index: 999;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.nav__mobile-menu--open {
  transform: translateY(0);
}

.nav__mobile-link {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 500;
  color: rgba(255,255,255,0.80);
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: color var(--transition);
  text-decoration: none;
}

.nav__mobile-link:last-of-type {
  border-bottom: none;
}

.nav__mobile-link:hover,
.nav__mobile-link--active { color: var(--color-teal-light); }

.nav__mobile-cta {
  margin-top: var(--space-5);
  width: 100%;
  text-align: center;
}

/* ── 7. Footer ── */
.footer {
  background: var(--color-navy-dark);
  color: rgba(255,255,255,0.75);
}

.footer__top {
  padding: var(--space-16) 0 var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__grid {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer__grid { grid-template-columns: 2fr 1fr 1fr 1.5fr; }
}

.footer__logo {
  height: 44px;
  width: auto;
  margin-bottom: var(--space-4);
}

.footer__brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.50);
  line-height: 1.6;
  margin: 0;
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal-light);
  margin-bottom: var(--space-5);
}

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

.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.60);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--color-white); }

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__contact-icon {
  width: 18px;
  height: 18px;
  color: var(--color-teal-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer__contact-text {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
}

.footer__contact-text a {
  color: var(--color-teal-light);
  font-weight: 500;
}
.footer__contact-text a:hover { color: var(--color-white); }

.footer__bottom {
  padding: var(--space-6) 0;
}

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

.footer__copy {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.40);
  margin: 0;
}

.footer__tagline-bottom {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.40);
  font-style: italic;
}

/* ── 8. CTA Band ── */
.cta-band {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-mid) 100%);
  padding: var(--space-20) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(14,140,140,0.2) 0%, transparent 70%);
  pointer-events: none;
}

.cta-band__inner { position: relative; z-index: 1; }

.cta-band__heading {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.cta-band__sub {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.70);
  max-width: 540px;
  margin: 0 auto var(--space-8);
}

.cta-band__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── 9. Responsive Helpers ── */
.hide-mobile { display: none; }
@media (min-width: 768px) { .hide-mobile { display: block; } }

.hide-desktop { display: block; }
@media (min-width: 768px) { .hide-desktop { display: none; } }

/* ── 10. Utility ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-light-gray);
  margin: var(--space-12) 0;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--color-teal-xlight);
  color: var(--color-teal);
}