/* ============================================================
   HospitalityOS Advisory — Design System
   Corporate/institutional with warmth
   ============================================================ */

:root {
  /* --- Colors --- */
  --color-navy:        #1a2744;
  --color-navy-deep:   #0f1a2e;
  --color-navy-light:  #2a3d5c;
  --color-slate:       #4a5568;
  --color-warm-gray:   #6b7280;
  --color-light:       #f7f6f3;
  --color-cream:       #faf9f6;
  --color-white:       #ffffff;
  --color-border:      #e2e0db;
  --color-accent:      #b8860b;       /* warm gold */
  --color-accent-hover:#9a7209;
  --color-accent-light: rgba(184, 134, 11, 0.08);
  --color-success:     #2d6a4f;

  /* --- Typography --- */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* --- Spacing --- */
  --max-width:    1140px;
  --section-pad:  100px;
  --section-pad-mobile: 56px;
  --nav-height:   72px;

  /* --- Radius --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 3px rgba(26,39,68,0.06);
  --shadow-md: 0 4px 16px rgba(26,39,68,0.08);
  --shadow-lg: 0 12px 40px rgba(26,39,68,0.12);
}

/* ============================================================
   Reset & Base
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-slate);
  background: var(--color-white);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-navy);
  color: var(--color-white);
  padding: 8px 16px;
  z-index: 9999;
  border-radius: var(--radius-sm);
}
.skip-link:focus { top: 8px; }

/* ============================================================
   Typography
   ============================================================ */

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(2.4rem, 4.5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.3rem, 2vw, 1.6rem); }
h4 { font-size: 1.1rem; font-family: var(--font-body); font-weight: 600; }

p { margin-bottom: 1.2em; }
p:last-child { margin-bottom: 0; }

.text-accent { color: var(--color-accent); }
.text-small  { font-size: 0.875rem; color: var(--color-warm-gray); }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section--navy {
  background: var(--color-navy);
  color: var(--color-white);
}
.section--navy h2,
.section--navy h3 { color: var(--color-white); }
.section--navy p   { color: rgba(255,255,255,0.8); }

.section--cream {
  background: var(--color-cream);
}

.section--light {
  background: var(--color-light);
}

/* ============================================================
   Navigation
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background 0.3s, box-shadow 0.3s;
  background: transparent;
}

.nav--scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  transition: color 0.3s;
}

.nav__logo-img { height: 36px; width: auto; transition: opacity 0.3s; }
.nav__logo-img--dark { display: none; }
.nav__logo-img--white { display: block; }
.nav--scrolled .nav__logo-img--dark { display: block; }
.nav--scrolled .nav__logo-img--white { display: none; }

.nav__logo-suffix {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  transition: color 0.3s;
}
.nav--scrolled .nav__logo-suffix { color: var(--color-warm-gray); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: color 0.2s;
  letter-spacing: 0.01em;
}
.nav__link:hover { color: var(--color-white); }
.nav--scrolled .nav__link { color: var(--color-slate); }
.nav--scrolled .nav__link:hover { color: var(--color-navy); }

.nav__cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px 24px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  transition: all 0.2s;
}
.nav__cta:hover {
  background: var(--color-white);
  color: var(--color-navy);
  border-color: var(--color-white);
}
.nav--scrolled .nav__cta {
  border-color: var(--color-navy);
  color: var(--color-navy);
}
.nav--scrolled .nav__cta:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  margin: 5px 0;
  transition: all 0.3s;
}
.nav--scrolled .nav__toggle span { background: var(--color-navy); }

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.01em;
}

.btn--primary {
  background: var(--color-navy);
  color: var(--color-white);
}
.btn--primary:hover {
  background: var(--color-navy-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn--accent:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  border: 1.5px solid var(--color-border);
  color: var(--color-navy);
}
.btn--outline:hover {
  border-color: var(--color-navy);
  background: var(--color-navy);
  color: var(--color-white);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-navy);
}
.btn--white:hover {
  background: var(--color-light);
  transform: translateY(-1px);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 16px 40px;
  font-size: 1rem;
}

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

.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(165deg, rgba(15,26,46,0.85) 0%, rgba(26,39,68,0.82) 50%, rgba(42,61,92,0.78) 100%), var(--hero-bg, #1a2744) center/cover no-repeat;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(ellipse at 70% 50%, rgba(184,134,11,0.06) 0%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding-top: calc(var(--nav-height) + 40px);
}

.hero__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid rgba(184,134,11,0.3);
  border-radius: var(--radius-sm);
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.7);
  margin-bottom: 40px;
  max-width: 560px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.hero__stat-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}

.hero__stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 6px;
  letter-spacing: 0.02em;
}

/* ============================================================
   Service Cards
   ============================================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px;
  transition: all 0.3s;
  position: relative;
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.service-card__number {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--color-navy);
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-card__description {
  font-size: 0.95rem;
  color: var(--color-warm-gray);
  line-height: 1.7;
  margin-bottom: 24px;
}

.service-card__link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-navy);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}
.service-card__link:hover { color: var(--color-accent); }
.service-card__link::after { content: '\2192'; transition: transform 0.2s; }
.service-card__link:hover::after { transform: translateX(4px); }

/* ============================================================
   Credentials / Social Proof
   ============================================================ */

.credentials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.credential {
  text-align: center;
  padding: 32px;
}

.credential__number {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
}

.credential__label {
  font-size: 0.9rem;
  color: var(--color-warm-gray);
  line-height: 1.5;
}

/* ============================================================
   About / Principal Section
   ============================================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.about__text {
  font-size: 1.05rem;
  color: var(--color-slate);
  margin-bottom: 20px;
}

.about__credentials-list {
  list-style: none;
  padding: 0;
  margin-top: 32px;
}

.about__credentials-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-slate);
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.about__credentials-list li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 8px;
  flex-shrink: 0;
}

/* ============================================================
   CTA Banner
   ============================================================ */

.cta-banner {
  text-align: center;
  padding: 80px 24px;
  background: var(--color-navy);
  color: var(--color-white);
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: 16px;
}

.cta-banner p {
  color: rgba(255,255,255,0.7);
  max-width: 480px;
  margin: 0 auto 32px;
}

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

.footer {
  background: var(--color-navy-deep);
  color: rgba(255,255,255,0.6);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand-name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer__brand-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer__heading {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 20px;
}

.footer__links {
  list-style: none;
}

.footer__links li { margin-bottom: 10px; }

.footer__links a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer__links a:hover { color: var(--color-white); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.footer__social {
  display: flex;
  gap: 16px;
}

.footer__social a {
  color: rgba(255,255,255,0.4);
  transition: color 0.2s;
}
.footer__social a:hover { color: var(--color-white); }

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

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-navy);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* ============================================================
   Service Detail Pages
   ============================================================ */

.service-hero {
  padding: calc(var(--nav-height) + 100px) 0 80px;
  background: linear-gradient(165deg, rgba(15,26,46,0.88) 0%, rgba(26,39,68,0.85) 100%), var(--service-hero-bg, #1a2744) center/cover no-repeat;
}

.service-hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.service-hero h1 {
  color: var(--color-white);
  margin-bottom: 20px;
  max-width: 680px;
}

.service-hero__subtitle {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.7);
  max-width: 580px;
  line-height: 1.7;
}

.service-content {
  padding: 80px 0;
}

.service-content h2 {
  margin-bottom: 20px;
}

.service-content p {
  max-width: 720px;
}

.deliverables-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.deliverable {
  background: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.deliverable__number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.deliverable h4 {
  margin-bottom: 8px;
  color: var(--color-navy);
}

.deliverable p {
  font-size: 0.9rem;
  color: var(--color-warm-gray);
}

/* ============================================================
   Divider
   ============================================================ */

.divider {
  width: 48px;
  height: 2px;
  background: var(--color-accent);
  margin: 24px 0;
}

.divider--center {
  margin: 24px auto;
}

/* ============================================================
   Animations
   ============================================================ */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 968px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; }

  .nav__links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: 24px;
    box-shadow: var(--shadow-md);
    gap: 16px;
  }
  .nav__links.active .nav__link { color: var(--color-slate); }
  .nav__links.active .nav__cta {
    color: var(--color-navy);
    border-color: var(--color-navy);
    text-align: center;
  }

  .hero { min-height: 80vh; }
  .hero__stats { gap: 24px; flex-wrap: wrap; }

  .services-grid { grid-template-columns: 1fr; }
  .credentials { grid-template-columns: 1fr; gap: 24px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .deliverables-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; gap: 12px; }

  .section { padding: var(--section-pad-mobile) 0; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .service-card { padding: 28px; }
  .hero__stats { flex-direction: column; gap: 20px; }
}