/* ============================================
   STRANGELOOP — Design System
   Aesthetic: Research lab meets editorial.
   Monochrome + single accent. Typography-led.
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

/* --- Variables --- */
:root {
  --color-bg: #0C0C0E;
  --color-surface: #141417;
  --color-surface-2: #1C1C21;
  --color-border: #2A2A32;
  --color-text: #E8E6E1;
  --color-text-secondary: #9B9A97;
  --color-text-dim: #6B6A68;
  --color-accent: #C4F24D;
  --color-accent-dim: rgba(196, 242, 77, 0.12);
  --color-white: #FAFAF8;

  --font-display: 'DM Mono', monospace;
  --font-body: 'DM Sans', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;

  --max-width: 1200px;
  --max-width-narrow: 800px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  overflow-x: hidden;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.8;
}

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

p {
  max-width: 65ch;
  margin-bottom: var(--space-sm);
}

.label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

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

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

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* --- Header / Nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
  background: rgba(12, 12, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.site-logo span {
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.site-nav a {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-white);
  opacity: 1;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    gap: var(--space-sm);
  }

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

  .site-nav a {
    font-size: 1rem;
    padding: var(--space-xs) 0;
  }
}

/* --- Hero --- */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding-top: var(--space-2xl);
  position: relative;
}

.hero__content {
  max-width: 750px;
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero h1 .accent {
  color: var(--color-accent);
}

.hero__sub {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 550px;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

/* --- Pillars / Cards --- */
.pillar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-md);
  transition: border-color 0.3s, background 0.3s;
  display: flex;
  flex-direction: column;
}

.pillar-card:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
}

.pillar-card .label {
  margin-bottom: var(--space-sm);
}

.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: var(--space-sm);
  color: var(--color-white);
}

.pillar-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  flex-grow: 1;
}

.pillar-card .card-link {
  margin-top: var(--space-md);
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.pillar-card .card-link::after {
  content: '→';
  transition: transform 0.2s;
}

.pillar-card:hover .card-link::after {
  transform: translateX(4px);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.page-hero .label {
  margin-bottom: var(--space-sm);
}

.page-hero h1 {
  margin-bottom: var(--space-md);
}

.page-hero__intro {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Service Blocks --- */
.service-block {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.service-block h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.service-block .service-format {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
}

.service-block p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* --- About / Bio --- */
.bio-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.bio-photo {
  width: 200px;
  height: 200px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-dim);
  font-family: var(--font-display);
  font-size: 0.75rem;
}

.bio-content h3 {
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.3rem;
  margin-bottom: 0.25rem;
}

.bio-content .bio-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.bio-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .bio-section {
    grid-template-columns: 1fr;
  }
  .bio-photo {
    width: 140px;
    height: 140px;
  }
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

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

.form-group label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  border-radius: 0;
}

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

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

.form-group select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%236B6A68'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 400;
  padding: 0.85rem 2rem;
  border: 1px solid var(--color-accent);
  background: transparent;
  color: var(--color-accent);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  letter-spacing: 0.02em;
}

.btn:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  opacity: 1;
}

.btn--filled {
  background: var(--color-accent);
  color: var(--color-bg);
}

.btn--filled:hover {
  background: transparent;
  color: var(--color-accent);
}

/* --- Divider --- */
.divider {
  width: 48px;
  height: 1px;
  background: var(--color-accent);
  margin: var(--space-md) 0;
}

/* --- Featured block --- */
.featured-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
}

.featured-block .label {
  margin-bottom: var(--space-sm);
}

.featured-block h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-white);
  font-weight: 400;
}

.featured-block p {
  color: var(--color-text-secondary);
}

/* --- Audience list --- */
.audience-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.audience-list li {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-border);
  transition: border-color 0.2s;
}

.audience-list li:hover {
  border-color: var(--color-text-dim);
}

/* --- Footer --- */
.site-footer {
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-xl);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: var(--space-sm);
}

.footer-col a {
  display: block;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--color-white);
  opacity: 1;
}

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-bottom p {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--color-text-dim);
  margin-bottom: 0;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* stagger children */
.stagger > .fade-in:nth-child(1) { transition-delay: 0s; }
.stagger > .fade-in:nth-child(2) { transition-delay: 0.1s; }
.stagger > .fade-in:nth-child(3) { transition-delay: 0.2s; }
.stagger > .fade-in:nth-child(4) { transition-delay: 0.3s; }

/* --- Grain overlay --- */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* --- Education pricing table --- */
.programme-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .programme-grid {
    grid-template-columns: 1fr;
  }
}

.programme-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-md);
  transition: border-color 0.3s;
}

.programme-card:hover {
  border-color: var(--color-accent);
}

.programme-card .label {
  margin-bottom: var(--space-xs);
}

.programme-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.programme-card .price {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.programme-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* --- Inline list (differentiators etc) --- */
.check-list {
  list-style: none;
  margin: var(--space-md) 0;
}

.check-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  border-bottom: 1px solid var(--color-border);
}

.check-list li:last-child {
  border-bottom: none;
}

.check-list li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-family: var(--font-display);
}

/* --- About associates --- */
.associates-note {
  background: var(--color-surface);
  border-left: 2px solid var(--color-accent);
  padding: var(--space-md);
  margin-top: var(--space-lg);
}

.associates-note p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* --- Contact info --- */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-info-item .label {
  margin-bottom: 0.25rem;
}

.contact-info-item p,
.contact-info-item a {
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.contact-info-item--divider {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

/* --- Utilities (token-driven, replaces scattered inline styles) --- */
.btn--compact {
  padding: 0.5rem 1.2rem;
  font-size: 0.75rem;
}

.btn--mt-md {
  margin-top: var(--space-md);
}

.label--mb-md {
  margin-bottom: var(--space-md);
}

.section--border-top {
  border-top: 1px solid var(--color-border);
}

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

.cta-lead {
  color: var(--color-text-secondary);
  margin: 0 auto var(--space-md);
}

a.pillar-card {
  text-decoration: none;
  color: inherit;
}

a.pillar-card:hover {
  opacity: 1;
}

.card-link--muted {
  color: var(--color-text-dim);
}