/* BlitzByte LLC marketing site — design tokens from orchestration/docs/brand-standards.md */
:root {
  --color-primary: #1e3a5f;
  --color-primary-light: #2c5282;
  --color-primary-deep: #152a45;
  --color-accent: #3182ce;
  --color-accent-bright: #4299e1;
  --color-neutral-bg: #f0f4f8;
  --color-neutral-surface: #ffffff;
  --color-neutral-text: #2d3748;
  --color-neutral-muted: #64748b;
  --color-cta: #2563eb;
  --color-cta-hover: #1d4ed8;
  --color-border: #e2e8f0;
  --color-error: #c53030;
  --color-success: #276749;
  --font-sans: 'Outfit', system-ui, -apple-system, sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --radius: 8px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(30, 58, 95, 0.12);
  --shadow-lg: 0 10px 40px rgba(30, 58, 95, 0.15);
  --transition: 0.2s ease;
  --transition-slow: 0.35s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-neutral-text);
  background: var(--color-neutral-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* Not-found in-page message */
.notfound-message {
  background: #fef3c7;
  color: #92400e;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid #f59e0b;
  text-align: center;
}

.notfound-message p {
  margin: 0;
}

/* Header */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 58, 95, 0.08);
  padding: var(--space-lg) 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}

.logo-lockup:hover {
  color: var(--color-primary-light);
}

.logo-mark {
  display: block;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.wordmark {
  letter-spacing: -0.02em;
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  flex-direction: column;
  gap: 5px;
  z-index: 12;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav {
  display: flex;
  gap: var(--space-xl);
}

.nav a {
  color: var(--color-neutral-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition);
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition);
}

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

.nav a:hover::after {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(165deg, var(--color-primary-deep) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-neutral-surface);
  padding: var(--space-3xl) 0;
  text-align: center;
  overflow: hidden;
}

.hero--with-bg .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url('hero-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.hero--with-bg .hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg, var(--color-primary-deep) 0%, transparent 40%, var(--color-primary-light) 100%);
  opacity: 0.85;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 80%;
  height: 120%;
  background: radial-gradient(ellipse at center, rgba(66, 153, 225, 0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  margin: 0 0 var(--space-lg);
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  max-width: 20ch;
  margin-left: auto;
  margin-right: auto;
}

.hero-tagline {
  margin: 0 0 var(--space-2xl);
  font-size: 1.2rem;
  opacity: 0.95;
  font-weight: 500;
  letter-spacing: 0.01em;
  max-width: 36ch;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-2xl);
  background: var(--color-cta);
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.cta-button:hover {
  background: var(--color-cta-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.cta-button:active {
  transform: translateY(0);
}

.cta-button:focus {
  outline: 2px solid var(--color-accent-bright);
  outline-offset: 3px;
}

.cta-button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Loading spinner inside button */
.btn-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
  background: var(--color-neutral-surface);
  scroll-margin-top: 5rem;
}

.section:nth-child(even) {
  background: var(--color-neutral-bg);
}

.section h2 {
  margin: 0 0 var(--space-lg);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.section h2::before {
  content: '';
  width: 4px;
  height: 1.4em;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-full);
}

.section p {
  margin: 0;
  color: var(--color-neutral-text);
  font-size: 1.05rem;
  line-height: 1.7;
}

.section p + p {
  margin-top: var(--space-md);
}

.section-lead {
  margin-bottom: var(--space-xl);
  color: var(--color-neutral-muted);
  font-size: 1rem;
}

/* Who we are – team block */
.team-block {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.team-photo {
  width: 120px;
  height: 120px;
  min-width: 120px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.team-bio {
  flex: 1;
  min-width: 200px;
}

.team-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  margin: 0 0 var(--space-sm);
}

.team-desc {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--color-neutral-text);
}

/* Case studies */
.case-study-list {
  list-style: none;
  margin: var(--space-xl) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-lg);
}

.case-study {
  padding: var(--space-lg);
  background: var(--color-neutral-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.case-study:has(.case-study-link) {
  padding: 0;
  cursor: pointer;
}

.case-study:has(.case-study-link):hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.case-study-link {
  display: block;
  padding: var(--space-lg);
  text-decoration: none;
  color: inherit;
}

.case-study h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
}

.external-link-icon {
  font-size: 0.85em;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.case-study:hover .external-link-icon {
  opacity: 1;
}

.case-study p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-neutral-text);
}

/* Capabilities section with background */
.section--with-bg {
  position: relative;
  padding: var(--space-3xl) 0;
}

.section--with-bg .section-bg {
  position: absolute;
  inset: 0;
  background-image: url('capabilities-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
}

.section--with-bg .container {
  position: relative;
  z-index: 1;
}

.section--with-bg h2 {
  text-align: center;
  justify-content: center;
}

.section--with-bg h2::before {
  display: none;
}

.capability-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.capability-card {
  background: var(--color-neutral-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.capability-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.capability-icon svg {
  width: 28px;
  height: 28px;
}

.capability-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.capability-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-neutral-text);
}

/* Contact form */
.contact-section--splash {
  position: relative;
  background: linear-gradient(180deg, var(--color-neutral-bg) 0%, rgba(30, 58, 95, 0.06) 50%, var(--color-neutral-bg) 100%);
}

.contact-section--splash .contact-section-bg {
  position: absolute;
  inset: 0;
  background-image: url('contact-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.06;
  pointer-events: none;
}

.contact-section--splash .container {
  position: relative;
  z-index: 1;
}

.contact-section--splash h2 {
  text-align: center;
  justify-content: center;
}

.contact-section--splash h2::before {
  display: none;
}

p.contact-section-intro {
  text-align: center;
  max-width: 36ch;
  margin: var(--space-xl) auto var(--space-lg);
}

.contact-form-card {
  background: var(--color-neutral-surface);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  max-width: 32rem;
  margin: var(--space-xl) auto var(--space-lg);
}

.contact-form {
  width: 100%;
  max-width: 100%;
  margin-bottom: var(--space-xl);
  text-align: center;
}

.contact-form .form-row {
  text-align: left;
}

.form-row {
  margin-bottom: var(--space-lg);
}

.form-row label {
  display: block;
  margin: 0 0 var(--space-sm);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-neutral-text);
}

.required {
  color: var(--color-error);
}

.form-row input,
.form-row textarea {
  width: 100%;
  margin: 0;
  padding: var(--space-md) var(--space-lg);
  font-family: inherit;
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-neutral-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  box-sizing: border-box;
}

.form-row input:hover,
.form-row textarea:hover {
  border-color: #cbd5e1;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(49, 130, 206, 0.15);
}

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

.form-status {
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius);
  font-weight: 500;
}

.form-status.error {
  background: #fef2f2;
  color: var(--color-error);
  border: 1px solid #fecaca;
}

.form-status.success {
  background: #f0fdf4;
  color: var(--color-success);
  border: 1px solid #bbf7d0;
}

p.contact-fallback {
  font-size: 0.9375rem;
  color: var(--color-neutral-muted);
  text-align: center;
  max-width: 32rem;
  margin: var(--space-xl) auto var(--space-lg);
}

.contact-fallback a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.contact-fallback a:hover {
  border-bottom-color: var(--color-accent);
}

/* Footer */
.site-footer {
  background: linear-gradient(180deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
  color: var(--color-neutral-surface);
  padding: var(--space-2xl) 0;
  margin-top: 0;
}

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

.footer-inner .logo-lockup {
  color: inherit;
  margin-bottom: var(--space-lg);
  justify-content: center;
}

.footer-inner .logo-mark {
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-location {
  margin: 0 0 var(--space-md);
  font-size: 0.85rem;
  opacity: 0.65;
  font-weight: 400;
}

.footer-copy {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
  font-weight: 500;
}

/* Accessibility: reduce motion if preferred */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .cta-button,
  .nav a::after {
    transition: none;
  }
  .cta-button:hover {
    transform: none;
  }
  .capability-card:hover {
    transform: none;
  }
  .btn-spinner {
    animation: none;
  }
}

/* Mobile nav breakpoint */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-sm) 0;
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

  .nav a:last-child {
    border-bottom: none;
  }

  .nav a::after {
    display: none;
  }

  .header-inner {
    position: relative;
  }

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

/* Wider container on large screens */
@media (min-width: 900px) {
  .container {
    max-width: 960px;
  }
}