/* ==========================================================================
   Nexus Link Advisory — Bold Immersive One-Page Design
   Full-screen sections, dramatic navy, large typography, smooth transitions
   CSS logical properties for RTL/LTR (FOUND-04)
   ========================================================================== */

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { color: var(--text-body); background: var(--color-navy); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img, svg { display: block; max-inline-size: 100%; block-size: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.skip-link { position: absolute; inset-inline-start: -9999px; z-index: 999; padding: 0.5rem 1rem; background: var(--accent); color: #fff; }
.skip-link:focus { inset-inline-start: 1rem; inset-block-start: 1rem; }

/* === TOKENS === */
:root {
  --color-navy: #1B2A4A;
  --color-navy-deep: #0F1A2E;
  --color-navy-light: #2A3F6B;
  --color-green: #2D8C5A;
  --color-green-light: #3BA76D;
  --color-white: #FFFFFF;
  --color-gray-50: #F8F9FA;
  --color-gray-100: #E9ECEF;
  --color-gray-200: #DEE2E6;
  --color-gray-400: #ADB5BD;
  --color-gray-600: #6C757D;
  --color-gray-800: #343A40;
  --color-gray-900: #212529;

  --text-primary: var(--color-navy);
  --text-body: var(--color-gray-800);
  --text-secondary: var(--color-gray-600);
  --text-inverse: var(--color-white);
  --bg-primary: var(--color-navy);
  --bg-light: var(--color-gray-50);
  --accent: var(--color-green);

  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-ar: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
  --weight-light: 300;
  --weight-regular: 400;
  --weight-semibold: 600;
  --weight-bold: 700;

  --max-width: 1200px;
}

/* === TYPOGRAPHY === */
[lang="en"] { font-family: var(--font-en); line-height: 1.6; }
[lang="ar"] { font-family: var(--font-ar); line-height: 1.8; font-size: 1.125rem; }

[lang="en"] h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); line-height: 1.05; font-weight: var(--weight-bold); letter-spacing: -0.02em; }
[lang="en"] h2 { font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.1; font-weight: var(--weight-bold); letter-spacing: -0.01em; }
[lang="en"] h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); line-height: 1.3; font-weight: var(--weight-semibold); }

[lang="ar"] h1 { font-size: clamp(2.8rem, 6vw, 5rem); line-height: 1.15; font-weight: var(--weight-bold); }
[lang="ar"] h2 { font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.2; font-weight: var(--weight-bold); }
[lang="ar"] h3 { font-size: clamp(1.3rem, 2.5vw, 1.65rem); line-height: 1.4; font-weight: var(--weight-semibold); }

p { margin-block-end: 1rem; }

/* === LAYOUT === */
.container { max-inline-size: var(--max-width); margin-inline: auto; padding-inline: 1.5rem; }

/* === FIXED NAV (transparent, overlays hero) === */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  padding-block: 1.25rem;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.site-header.is-scrolled {
  background-color: rgba(27, 42, 74, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-header__logo img {
  block-size: 40px;
  inline-size: auto;
  filter: brightness(0) invert(1);
}

.site-header.is-scrolled .site-header__logo img {
  filter: brightness(0) invert(1);
}

/* === NAV === */
.site-nav { display: none; }
.site-nav.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  background: var(--color-navy-deep);
  z-index: 200;
  padding: 6rem 2rem 2rem;
  gap: 0.5rem;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.site-nav__link {
  display: block;
  padding: 1rem 0;
  color: var(--text-inverse);
  font-weight: var(--weight-semibold);
  font-size: 1.25rem;
  border-block-end: 1px solid rgba(255,255,255,0.1);
  transition: color 0.2s;
}

.site-nav__link:hover, .site-nav__link--active { color: var(--accent); }

.site-nav__dropdown { position: relative; }
.site-nav__subnav { display: none; padding-inline-start: 1.5rem; }
.site-nav__dropdown.is-open .site-nav__subnav { display: block; }

.site-nav__sublink {
  display: block;
  padding: 0.5rem 0;
  color: var(--color-gray-400);
  font-size: 1rem;
  transition: color 0.2s;
}
.site-nav__sublink:hover { color: var(--accent); }

/* Language switcher */
.lang-switch {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-weight: var(--weight-semibold);
  color: var(--text-inverse);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 100px;
  font-size: 0.875rem;
  transition: all 0.2s;
  white-space: nowrap;
  margin-inline-start: auto;
}
.lang-switch:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.7); }

/* Nav toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0.5rem;
  z-index: 300;
}
.nav-toggle__bar {
  display: block;
  inline-size: 26px;
  block-size: 2px;
  background-color: var(--text-inverse);
  transition: transform 0.3s, opacity 0.3s;
}

/* === HERO — Full viewport, dramatic with background image === */
.hero {
  min-block-size: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-navy-deep);
  color: var(--text-inverse);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--hero-bg, none) center/cover no-repeat;
  opacity: 0.25;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(15, 26, 46, 0.9) 0%, rgba(27, 42, 74, 0.7) 50%, rgba(42, 63, 107, 0.8) 100%);
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero h1 {
  color: var(--text-inverse);
  margin-block-end: 1.5rem;
  max-inline-size: 800px;
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  max-inline-size: 600px;
  color: var(--color-gray-200);
  margin-block-end: 2.5rem;
  line-height: 1.7;
}

.hero__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-block-end: 1.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(45, 140, 90, 0.4);
  border-radius: 100px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  font-weight: var(--weight-semibold);
  font-size: 1rem;
  border-radius: 100px;
  transition: all 0.3s;
}

.btn--primary {
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: 0 4px 15px rgba(45, 140, 90, 0.3);
}
.btn--primary:hover { background: var(--color-green-light); transform: translateY(-2px); box-shadow: 0 6px 25px rgba(45, 140, 90, 0.4); }

.btn--outline {
  background: transparent;
  color: var(--text-inverse);
  border: 1px solid rgba(255,255,255,0.3);
}
.btn--outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); }

.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* === SECTIONS — Alternating full-width blocks === */
.section {
  padding-block: clamp(4rem, 8vw, 8rem);
}

.section--white {
  background: var(--color-white);
  color: var(--text-body);
}

.section--light {
  background: var(--color-gray-50);
  color: var(--text-body);
}

.section--dark {
  background: var(--color-navy);
  color: var(--text-inverse);
}

.section--dark h2, .section--dark h3 { color: var(--text-inverse); }
.section--white h2, .section--light h2 { color: var(--text-primary); }

.section__header {
  text-align: center;
  margin-block-end: clamp(2.5rem, 5vw, 4rem);
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-block-end: 1rem;
}

.section__header p {
  max-inline-size: 650px;
  margin-inline: auto;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.section--dark .section__header p { color: var(--color-gray-400); }

/* === SERVICES GRID === */
.services-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.service-card {
  background: var(--color-white);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--color-gray-100);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.service-card__image {
  block-size: 200px;
  position: relative;
  overflow: hidden;
}

.service-card__image img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  display: block;
}

.service-card__image::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent 50%, rgba(27, 42, 74, 0.05) 100%);
}

.service-card__body {
  padding: 2rem 2.5rem 2.5rem;
}

.service-card__icon {
  inline-size: 48px;
  block-size: 48px;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-block-start: -40px;
  margin-block-end: 1.25rem;
  color: var(--text-inverse);
  font-size: 1.25rem;
  font-weight: var(--weight-bold);
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.service-card h3 {
  margin-block-end: 0.75rem;
  color: var(--text-primary);
}

.service-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-block-end: 0;
}

/* === ABOUT / WHO WE ARE === */
.about-content {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.about-content__text p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-gray-400);
}

.about-content__image {
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}

.about-content__image img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  min-block-size: 300px;
  border-radius: 16px;
}

.about-content__image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(27, 42, 74, 0.2) 0%, transparent 100%);
}

.stats-row {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  margin-block-start: 2.5rem;
}

.stat { text-align: center; }
.stat__number {
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--weight-bold);
  color: var(--accent);
  line-height: 1;
}
.stat__label {
  font-size: 0.85rem;
  color: var(--color-gray-400);
  margin-block-start: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === PROCESS / EXPERT SOURCING STEPS === */
.process-steps {
  display: grid;
  gap: 1.5rem;
  counter-reset: step;
}

.process-step {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  counter-increment: step;
}

.process-step__number {
  flex-shrink: 0;
  inline-size: 48px;
  block-size: 48px;
  background: rgba(45, 140, 90, 0.15);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--weight-bold);
  color: var(--accent);
  font-size: 1.1rem;
}

.process-step__content h3 { margin-block-end: 0.5rem; }
.process-step__content p { margin-block-end: 0; color: var(--text-secondary); }
.section--dark .process-step__content p { color: var(--color-gray-400); }

/* === TEAM === */
.team-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.team-card {
  background: var(--color-white);
  border-radius: 16px;
  padding: 2.5rem;
  text-align: center;
  border: 1px solid var(--color-gray-100);
  transition: transform 0.3s, box-shadow 0.3s;
}

.team-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.team-card__avatar {
  inline-size: 80px;
  block-size: 80px;
  margin-inline: auto;
  margin-block-end: 1.5rem;
}

.team-card__avatar-svg {
  inline-size: 100%;
  block-size: 100%;
}

.team-card__name {
  font-size: 1.2rem;
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin-block-end: 0.25rem;
}

.team-card__title {
  display: block;
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: var(--weight-semibold);
  margin-block-end: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.team-card__bio {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-block-end: 0;
}

/* === FM SUB-SERVICES === */
.fm-subs {
  display: grid;
  gap: 1rem;
  margin-block-start: 1.25rem;
  padding-block-start: 1.25rem;
  border-block-start: 1px solid var(--color-gray-100);
}

.fm-sub h4 {
  font-size: 0.9rem;
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin-block-end: 0.25rem;
}

.fm-sub p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-block-end: 0;
}

/* === WHATSAPP FAB === */
.whatsapp-fab {
  position: fixed;
  inset-block-end: 2rem;
  inset-inline-end: 2rem;
  z-index: 90;
  inline-size: 56px;
  block-size: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  transition: transform 0.3s, box-shadow 0.3s;
}

.whatsapp-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 25px rgba(37, 211, 102, 0.5);
}

.whatsapp-fab svg {
  inline-size: 28px;
  block-size: 28px;
}

/* === CONTACT SECTION === */
.contact-grid {
  display: grid;
  gap: 3rem;
}

.contact-info { display: flex; flex-direction: column; gap: 2rem; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-item__icon {
  flex-shrink: 0;
  inline-size: 44px;
  block-size: 44px;
  background: rgba(45, 140, 90, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-weight: var(--weight-bold);
}

.contact-item__text strong {
  display: block;
  margin-block-end: 0.25rem;
  color: var(--text-inverse);
}

.contact-item__text span, .contact-item__text a {
  color: var(--color-gray-400);
  transition: color 0.2s;
}
.contact-item__text a:hover { color: var(--accent); }

.phone-ltr { direction: ltr; unicode-bidi: embed; }

/* === FOOTER === */
.site-footer {
  background: var(--color-navy-deep);
  color: var(--color-gray-400);
  padding-block: 2.5rem;
  text-align: center;
  font-size: 0.875rem;
  border-block-start: 1px solid rgba(255,255,255,0.08);
}

.site-footer__logo img {
  block-size: 32px;
  inline-size: auto;
  margin-inline: auto;
  margin-block-end: 1rem;
  filter: brightness(0) invert(1);
  opacity: 0.6;
}

/* === CONTACT FORM === */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-field label {
  display: block;
  margin-block-end: 0.5rem;
  font-weight: var(--weight-semibold);
  font-size: 0.9rem;
  color: var(--text-inverse);
}

.form-field input,
.form-field textarea {
  inline-size: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  color: var(--text-inverse);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, background 0.2s;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.12);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-gray-600);
}

.form-field textarea { resize: vertical; min-block-size: 120px; }

.required { color: var(--accent); }
.form-optional { color: var(--color-gray-400); font-weight: var(--weight-regular); font-size: 0.85rem; }

/* Honeypot -- visually hidden but accessible to bots */
.form-field--hp {
  position: absolute;
  inset-inline-start: -9999px;
  opacity: 0;
  block-size: 0;
  overflow: hidden;
}

/* Validation error state */
.form-field.has-error input,
.form-field.has-error textarea {
  border-color: #e74c3c;
}

.form-error {
  display: none;
  font-size: 0.825rem;
  color: #e74c3c;
  margin-block-start: 0.35rem;
}

.form-field.has-error .form-error { display: block; }

/* Submit button full width */
.btn--full { inline-size: 100%; justify-content: center; }

/* Form status messages */
.form-status { font-size: 0.95rem; margin-block-start: 0.5rem; }
.form-status--success { color: var(--accent); }
.form-status--error { color: #e74c3c; }

/* === RESPONSIVE === */
@media (min-width: 768px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .about-content { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .nav-toggle { display: none; }
  .lang-switch--mobile { display: none; }

  .site-nav {
    display: flex;
    align-items: center;
    margin-inline-start: auto;
    gap: 0.5rem;
  }

  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 0;
  }

  .site-nav__link {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-block-end: none;
  }

  .site-nav__dropdown:hover .site-nav__subnav {
    display: block;
    position: absolute;
    inset-block-start: 100%;
    inset-inline-start: 0;
    background: rgba(27, 42, 74, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    border-radius: 12px;
    padding-block: 0.75rem;
    min-inline-size: 220px;
    z-index: 50;
  }

  .site-nav__sublink { padding: 0.5rem 1.25rem; color: var(--color-gray-400); }

  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .team-grid { grid-template-columns: repeat(3, 1fr); }
}

/* === ANIMATIONS (subtle fade-in on scroll) === */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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