/* ============================================
   WULFBAIN.COM — Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors — derived from Wulfbain logo */
  --color-primary: #1a1a2e;       /* Deep navy */
  --color-primary-light: #2d2d44; /* Lighter navy */
  --color-accent: #d4622b;        /* Burnt orange from wolf icon */
  --color-accent-hover: #b8521f;  /* Darker accent */
  --color-accent-light: #f4e6de;  /* Light orange tint */
  --color-white: #ffffff;
  --color-offwhite: #f8f7f5;      /* Warm off-white */
  --color-gray-100: #f3f2f0;
  --color-gray-200: #e5e4e1;
  --color-gray-300: #c9c8c5;
  --color-gray-500: #7a7874;
  --color-gray-700: #4a4845;
  --color-text: #2c2c2c;
  --color-text-light: #5a5a5a;

  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.5rem;
  --line-height-tight: 1.15;
  --line-height-normal: 1.6;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;

  /* Transitions */
  --transition: 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-white);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent-hover);
}

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

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
  margin-bottom: var(--space-sm);
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section {
  padding: var(--space-3xl) 0;
}

.section--dark {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

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

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--color-accent);
}

.text-light {
  color: var(--color-text-light);
}

.section-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  margin-bottom: var(--space-lg);
}

.section-intro {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 700px;
  margin-bottom: var(--space-2xl);
}

.text-center .section-intro {
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

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

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

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

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

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

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

.btn--large {
  padding: 1rem 2.5rem;
  font-size: var(--font-size-lg);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: box-shadow var(--transition);
}

.nav--scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo img {
  height: 81px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav__links a {
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.5rem 0;
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

.nav__links a:hover {
  color: var(--color-primary);
}

.nav__cta {
  margin-left: var(--space-sm);
}

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

.nav__mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav__mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  margin: 6px 0;
  transition: all var(--transition);
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(72px + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  background-color: var(--color-primary);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(135deg, rgba(212, 98, 43, 0.08) 0%, transparent 60%);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

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

.hero__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-gray-300);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-xl);
  max-width: 520px;
}

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

.hero__image {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.hero__image img {
  width: 380px;
  height: 380px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding-top: calc(72px + var(--space-2xl));
  padding-bottom: var(--space-2xl);
  background-color: var(--color-primary);
  color: var(--color-white);
}

.page-hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-sm);
}

.page-hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-300);
  max-width: 600px;
}

/* --- Service Pillars / Cards --- */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.pillar {
  padding: var(--space-xl);
  border-radius: 8px;
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition);
}

.pillar:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.pillar__icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.pillar h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.pillar p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* --- Metrics / Results Bar --- */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  text-align: center;
}

.metric {
  padding: var(--space-lg);
}

.metric__value {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.section--dark .metric__value {
  color: var(--color-accent);
}

.metric__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: 500;
}

.section--dark .metric__label {
  color: var(--color-gray-300);
}

/* --- Client Logos --- */
.clients-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-xl) var(--space-2xl);
}

.clients-bar__item {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.55;
  transition: opacity var(--transition);
}

.clients-bar__item:hover {
  opacity: 0.85;
}

.clients-bar__item img {
  height: 36px;
  width: auto;
}

.section--dark .clients-bar__item {
  filter: brightness(0) invert(1);
}

/* --- Case Study Cards --- */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.case-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
  padding: var(--space-xl);
  transition: all var(--transition);
}

.case-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.case-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
}

.case-card__company {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.case-card__period {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  white-space: nowrap;
}

.case-card__role {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.case-card__results {
  list-style: none;
}

.case-card__results li {
  padding: var(--space-xs) 0;
  padding-left: 1.25rem;
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

.case-card__results li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* --- About Page --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-photo img {
  width: 100%;
  max-width: 360px;
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.about-content h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.about-content h3:first-child {
  margin-top: 0;
}

.about-content p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  line-height: 1.8;
}

.approach-list {
  list-style: none;
  margin: var(--space-md) 0;
}

.approach-list li {
  padding: var(--space-sm) 0;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
}

.approach-list li::before {
  content: '\25CF';
  font-size: 0.5em;
  color: var(--color-accent);
  flex-shrink: 0;
  position: relative;
  top: -0.1em;
}

/* --- Services Page --- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.service-block:last-child {
  border-bottom: none;
}

.service-block__number {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-gray-200);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.service-block h3 {
  margin-bottom: var(--space-sm);
}

.service-block p {
  color: var(--color-text-light);
}

.service-outcomes {
  list-style: none;
  margin-top: var(--space-md);
}

.service-outcomes li {
  padding: var(--space-xs) 0;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  color: var(--color-text-light);
  line-height: var(--line-height-normal);
}

.service-outcomes li::before {
  content: '\2014';
  color: var(--color-accent);
  flex-shrink: 0;
  font-weight: 700;
}

.service-clients {
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.service-clients strong {
  color: var(--color-text);
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info h3 {
  margin-bottom: var(--space-md);
}

.contact-info p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xl);
}

.contact-details {
  list-style: none;
}

.contact-details li {
  padding: var(--space-sm) 0;
  font-size: var(--font-size-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.contact-details li strong {
  color: var(--color-primary);
  min-width: 80px;
}

.contact-form {
  background-color: var(--color-offwhite);
  padding: var(--space-xl);
  border-radius: 8px;
}

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

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-300);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-white);
  transition: border-color var(--transition);
}

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

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-primary);
  color: var(--color-gray-300);
  padding: var(--space-2xl) 0;
}

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

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

.footer__logo img {
  height: 70px;
  width: auto;
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

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

.footer__links a {
  color: var(--color-gray-300);
  font-size: var(--font-size-sm);
}

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

.footer__copyright {
  width: 100%;
  text-align: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-primary-light);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* --- CTA Band --- */
.cta-band {
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.cta-band h2 {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-sm);
}

.cta-band p {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-bottom: var(--space-lg);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-gray-200);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-white);
  transform: translateX(-4px);
}

.timeline__period {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.timeline__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }

  .hero__grid {
    gap: var(--space-xl);
  }

  .hero__image img {
    width: 300px;
    height: 300px;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  /* Mobile navigation */
  .nav__links {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
  }

  .nav__links.active {
    display: flex;
  }

  .nav__mobile-toggle {
    display: block;
  }

  .nav__mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav__mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav__mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .nav__cta {
    margin-left: 0;
  }

  /* Hero mobile */
  .hero {
    padding-top: calc(72px + var(--space-xl));
  }

  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__image {
    order: -1;
  }

  .hero__image img {
    width: 240px;
    height: 240px;
  }

  /* Grid layouts mobile */
  .about-grid,
  .service-block,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .about-photo {
    text-align: center;
  }

  .about-photo img {
    max-width: 280px;
    margin: 0 auto;
  }

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

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__left {
    flex-direction: column;
  }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .clients-bar {
    gap: var(--space-md);
  }

  .clients-bar__item {
    font-size: var(--font-size-base);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }

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

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