:root {
  --terra-main: #C05746;
  --terra-dark: #8C3B2D;
  --terra-light: #E8A598;
  --terra-bg: #FDFBF9;
  --ink-primary: #1A1A1A;
  --ink-secondary: #4A4A4A;
  --ink-border: #E5E0D8;
  
  --font-serif: 'Lora', serif;
  --font-sans: 'Inter', sans-serif;
  
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
}

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

body {
  font-family: var(--font-sans);
  color: var(--ink-primary);
  background-color: var(--terra-bg);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  color: var(--ink-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

/* Header & Nav */
.osp-masthead {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(253, 251, 249, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ink-border);
  padding: var(--space-sm) 5%;
}

.osp-masthead-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.osp-brand-mark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--terra-dark);
}

.osp-nav-list {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  align-items: center;
  font-size: 0.9rem;
}

.osp-nav-list a:hover {
  color: var(--terra-main);
}

.osp-action-link {
  color: var(--terra-main);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

/* Buttons */
.osp-btn-primary {
  display: inline-block;
  background-color: var(--terra-main);
  color: #fff;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.osp-btn-primary:hover {
  background-color: var(--terra-dark);
  color: #fff;
}

.osp-btn-full {
  width: 100%;
  text-align: center;
}

/* Hero */
.osp-hero-bleed {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: flex-end;
  padding: 5%;
}

.osp-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.osp-hero-bg img {
  height: 100%;
}

.osp-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 60%, rgba(0,0,0,0.1) 100%);
}

.osp-hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 800px;
  padding-bottom: var(--space-lg);
}

.osp-display-heading {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: var(--space-sm);
  color: #fff;
}

.osp-hero-sub {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-family: var(--font-sans);
  font-weight: 300;
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

/* Studio Narrative (About) */
.osp-studio-depth {
  padding: var(--space-xl) 5%;
  background-color: var(--terra-bg);
}

.osp-narrative-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.osp-narrative-visual img {
  aspect-ratio: 4/5;
}

.osp-micro-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--terra-main);
  margin-bottom: var(--space-sm);
}

.osp-narrative-prose h2 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.osp-narrative-prose p {
  margin-bottom: var(--space-sm);
  color: var(--ink-secondary);
}

.osp-inline-link {
  color: var(--terra-main);
  text-decoration: underline;
  text-decoration-color: var(--terra-light);
  text-underline-offset: 4px;
}

.osp-data-highlight {
  margin: var(--space-md) 0;
  padding: var(--space-md);
  border-left: 3px solid var(--terra-main);
  background-color: rgba(192, 87, 70, 0.05);
}

.osp-data-metric {
  display: block;
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--terra-dark);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.osp-data-context {
  font-size: 0.9rem;
  color: var(--ink-secondary);
}

.osp-sub-text {
  font-size: 0.85rem;
  font-style: italic;
  margin-top: var(--space-md);
}

/* Practice Areas (Tabs) */
.osp-practice-areas {
  padding: var(--space-xl) 5%;
  background-color: #fff;
}

.osp-capabilities-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.osp-capabilities-header h2 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.osp-tab-interface {
  max-width: 1200px;
  margin: 0 auto;
}

.osp-tab-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--ink-border);
}

.osp-tab-trigger {
  background: none;
  border: none;
  padding: var(--space-sm) 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--ink-secondary);
  cursor: pointer;
  position: relative;
}

.osp-tab-trigger.is-active {
  color: var(--terra-main);
  font-weight: 500;
}

.osp-tab-trigger.is-active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--terra-main);
}

.osp-tab-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}

.osp-tab-panel.is-active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.osp-panel-asym {
  display: grid;
  grid-template-columns: 4fr 6fr;
  gap: var(--space-lg);
  align-items: center;
}

.osp-panel-reverse {
  grid-template-columns: 6fr 4fr;
}

.osp-panel-reverse .osp-panel-text {
  order: 2;
}

.osp-panel-reverse .osp-panel-img {
  order: 1;
}

.osp-panel-text h3 {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.osp-panel-text p {
  color: var(--ink-secondary);
  margin-bottom: var(--space-md);
}

.osp-benefit-list {
  list-style: none;
}

.osp-benefit-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--ink-primary);
}

.osp-benefit-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--terra-main);
}

.osp-process-steps {
  list-style: none;
}

.osp-process-steps li {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--ink-border);
  color: var(--ink-secondary);
}

.osp-process-steps strong {
  color: var(--ink-primary);
  display: block;
  font-family: var(--font-serif);
  margin-bottom: 0.25rem;
}

.osp-panel-img img {
  aspect-ratio: 16/10;
}

/* Client Metrics (Testimonials) */
.osp-client-voices, .osp-client-metrics {
  padding: var(--space-xl) 5%;
  background-color: var(--terra-bg);
}

.osp-voices-header h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.osp-voices-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.osp-voice-card {
  background: #fff;
  padding: var(--space-md);
  border: 1px solid var(--ink-border);
}

.osp-span-wide {
  grid-column: 1 / 8;
}

.osp-span-offset {
  grid-column: 6 / 13;
  margin-top: var(--space-lg);
}

.osp-span-standard {
  grid-column: 2 / 10;
  margin-top: calc(var(--space-lg) * -0.5);
  position: relative;
  z-index: 2;
}

.osp-quote-text {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--ink-primary);
  margin-bottom: var(--space-md);
}

.osp-quote-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.osp-quote-author img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
}

.osp-quote-author strong {
  display: block;
  font-size: 0.9rem;
}

.osp-quote-author span {
  font-size: 0.8rem;
  color: var(--ink-secondary);
}

/* Inquiry Hub (Contact) */
.osp-inquiry-hub {
  padding: var(--space-xl) 5%;
  background-color: #fff;
}

.osp-inquiry-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.osp-inquiry-meta h2 {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.osp-inquiry-meta p {
  color: var(--ink-secondary);
  margin-bottom: var(--space-md);
}

.osp-contact-details p {
  margin-bottom: 0.5rem;
  color: var(--ink-primary);
}

.osp-form-group {
  margin-bottom: 1.5rem;
}

.osp-form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--ink-secondary);
}

.osp-form-group input,
.osp-form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--ink-border);
  background: var(--terra-bg);
  font-family: var(--font-sans);
  transition: border-color 0.3s ease;
}

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

/* Footer */
.osp-colophon {
  background-color: var(--ink-primary);
  color: #fff;
  padding: var(--space-lg) 5% var(--space-sm);
}

.osp-colophon-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.osp-colophon-brand h3 {
  color: #fff;
  margin-bottom: var(--space-sm);
}

.osp-disclaimer-tiny {
  font-size: 0.75rem;
  color: #888;
  max-width: 80%;
}

.osp-colophon-links h4 {
  color: var(--terra-light);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.osp-colophon-links ul {
  list-style: none;
}

.osp-colophon-links li {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: #ccc;
}

.osp-colophon-links a:hover {
  color: #fff;
}

.osp-colophon-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-sm);
  text-align: center;
  font-size: 0.8rem;
  color: #888;
}

/* Responsive */
@media (max-width: 900px) {
  .osp-narrative-grid,
  .osp-panel-asym,
  .osp-panel-reverse,
  .osp-inquiry-container,
  .osp-colophon-inner {
    grid-template-columns: 1fr;
  }
  
  .osp-panel-reverse .osp-panel-text {
    order: 1;
  }
  .osp-panel-reverse .osp-panel-img {
    order: 2;
  }
  
  .osp-nav-list {
    display: none; /* Simplified for mobile */
  }
  
  .osp-span-wide, .osp-span-offset, .osp-span-standard {
    grid-column: 1 / -1;
    margin-top: 0;
  }
  
  .osp-tab-controls {
    flex-direction: column;
    align-items: center;
    border-bottom: none;
  }
  
  .osp-tab-trigger {
    border-bottom: 1px solid var(--ink-border);
    width: 100%;
  }
}