/* ==========================================
   Avicenna — Unified Stylesheet
   ========================================== */

/* --- Variables --- */
:root {
  --black: #0a0a0a;
  --white: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #a3a3a3;
  --gray-600: #525252;
  --accent: #1a1a1a;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

strong {
  font-weight: 600;
}

/* --- Layout --- */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
header {
  padding: 36px 0 20px;
  border-bottom: 1px solid var(--gray-200);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 40px;
  gap: 24px;
}

.logo {
  font-family: 'Instrument Serif', serif;
  font-size: 24px;
  color: var(--black);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 32px;
  align-items: center;
  flex-wrap: nowrap;
}

nav a {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}

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

h1 {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* --- Hero --- */
.hero {
  padding: 80px 0 60px;
}

.hero h1 {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(42px, 8vw, 56px);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 em {
  font-style: italic;
}

.hero .lead {
  font-size: 19px;
  color: var(--gray-600);
  max-width: 560px;
  margin-bottom: 24px;
}

.hero time {
  font-size: 14px;
  color: var(--gray-400);
}

.hero-inner {
  display: grid;
  gap: 40px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.hero-inner > div:not(.highlight-panel):not(.cta-row):not(.case-meta) {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-inner h1 {
  margin: 0;
}

.hero-inner .lead {
  margin: 0;
}

/* Homepage hero overrides */
.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--white);
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 500;
  transition: opacity 0.2s;
}

.hero-cta.secondary {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--gray-200);
}

.hero-cta:hover {
  opacity: 0.8;
}

.hero-intro {
  font-size: 19px;
  color: var(--gray-600);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--gray-200);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: 'Instrument Serif', serif;
  font-size: 32px;
  color: var(--black);
}

.stat-label {
  font-size: 14px;
  color: var(--gray-400);
  margin-top: 4px;
}

/* Eyebrow */
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

/* Case study hero */
.hero-case-study .hero-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.case-meta {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.case-meta-item {
  background: var(--gray-100);
  padding: 16px 20px;
  border-radius: 6px;
}

.case-meta-item span {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

.case-meta-item strong {
  display: block;
  margin-top: 4px;
  font-weight: 500;
}

/* --- CTA Buttons --- */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta-note {
  margin-top: 10px;
  font-size: 14px;
  color: var(--gray-400);
}

.primary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--white);
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
  font-size: inherit;
  font-family: inherit;
}

.primary-cta:hover {
  opacity: 0.8;
  color: var(--white);
}

.secondary-cta,
.ghost-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 6px;
  border: 1px solid var(--gray-200);
  color: var(--black);
  font-weight: 500;
  transition: background 0.2s;
}

.secondary-cta:hover,
.ghost-cta:hover {
  background: var(--gray-100);
}

/* --- Sections --- */
section {
  padding: 60px 0;
  border-top: 1px solid var(--gray-200);
}

.section-label,
.section-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 24px;
}

.section-header {
  margin-bottom: 32px;
}

.section-header .section-lead {
  margin-top: 8px;
}

.section-lead {
  font-size: 17px;
  color: var(--gray-600);
  max-width: 560px;
}

section h2 {
  font-family: 'Instrument Serif', serif;
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 20px;
  line-height: 1.3;
}

section p {
  color: var(--gray-600);
  margin-bottom: 16px;
}

section p:last-child {
  margin-bottom: 0;
}

section a:not(.primary-cta):not(.secondary-cta):not(.ghost-cta):not(.hero-cta):not(.newsletter-link):not(.contact-link):not(.logo) {
  font-weight: 500;
  color: var(--accent);
}

section a:not(.primary-cta):not(.secondary-cta):not(.ghost-cta):not(.hero-cta):not(.newsletter-link):not(.contact-link):not(.logo):hover {
  text-decoration: underline;
}

/* --- Services (homepage) --- */
.services {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}

.service {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--gray-200);
}

.service:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.service h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.service p {
  font-size: 16px;
}

.service a {
  font-weight: 500;
  color: var(--accent);
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--gray-100);
  padding: 24px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.card h3 a {
  color: inherit;
}

.card p {
  margin: 0;
  color: var(--gray-600);
  font-size: 16px;
}

.card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--gray-600);
  font-size: 16px;
}

.pill {
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--gray-200);
  color: var(--gray-600);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card-footer {
  margin-top: auto;
}

.card-footer a {
  font-weight: 500;
  color: var(--accent);
}

.card-footer a:hover {
  text-decoration: underline;
}

/* --- Solutions Grid --- */
.solutions-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.solution-card {
  background: var(--gray-100);
  padding: 24px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.solution-card h3 {
  font-family: 'Instrument Serif', serif;
  font-size: 22px;
  font-weight: 400;
  margin: 0;
}

.solution-card p {
  margin: 0;
  color: var(--gray-600);
}

.solution-body {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr 1fr;
}

.solution-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--gray-600);
  font-size: 15px;
}

.list-label {
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--black);
}

/* --- Two Column --- */
.two-column {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.two-column ul,
.two-column ol {
  padding-left: 20px;
  color: var(--gray-600);
}

.two-column li {
  margin-bottom: 8px;
}

/* --- Highlight Panel --- */
.highlight-panel {
  background: var(--gray-100);
  padding: 24px;
  border-radius: 8px;
}

.highlight-panel h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 12px;
}

.highlight-panel ul,
.highlight-panel ol {
  margin: 0;
  padding-left: 20px;
  color: var(--gray-600);
}

.highlight-panel li {
  margin-bottom: 8px;
}

.highlight-panel p {
  margin: 4px 0 0;
  color: var(--gray-600);
}

/* --- Tag List --- */
.tag-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list li {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--gray-200);
  font-size: 14px;
  color: var(--gray-600);
}

/* --- News --- */
.news-list {
  display: grid;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--gray-200);
  display: grid;
  gap: 8px;
}

.news-item:last-child {
  border-bottom: none;
}

.news-item time {
  font-size: 13px;
  color: var(--gray-400);
  letter-spacing: 0.05em;
}

.news-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.news-item h3 a {
  color: inherit;
}

.news-item h3 a:hover {
  text-decoration: underline;
}

.news-item p {
  margin: 0;
  color: var(--gray-600);
  font-size: 16px;
}

/* --- Approach (homepage) --- */
.approach-highlight {
  background: var(--gray-100);
  padding: 32px;
  border-radius: 8px;
  margin-top: 24px;
}

.approach-highlight p {
  font-family: 'Instrument Serif', serif;
  font-size: 22px;
  color: var(--black);
  line-height: 1.5;
  font-style: italic;
}

/* --- Industries (homepage) --- */
.industries-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.industry-tag {
  background: var(--gray-100);
  padding: 10px 18px;
  border-radius: 100px;
  font-size: 15px;
  color: var(--gray-600);
}

/* --- Newsletter Section --- */
.newsletter-section {
  background: var(--black);
  color: var(--white);
  margin: 0 -24px;
  padding: 60px 24px;
  border-top: none;
}

.newsletter-section .section-label {
  color: var(--gray-400);
}

.newsletter-section h2 {
  color: var(--white);
}

.newsletter-section p {
  color: var(--gray-400);
}

.newsletter-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  margin-top: 20px;
  padding: 12px 24px;
  border: 1px solid var(--gray-600);
  border-radius: 6px;
  transition: all 0.2s;
}

.newsletter-link:hover {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

.newsletter-link svg {
  width: 16px;
  height: 16px;
}

/* --- Contact (homepage) --- */
.contact-section {
  padding: 80px 0;
}

.contact-section h2 {
  font-size: 36px;
  margin-bottom: 16px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 32px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--black);
  text-decoration: none;
  font-size: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--gray-200);
  transition: all 0.2s;
}

.contact-link:hover {
  padding-left: 8px;
}

.contact-link svg {
  width: 20px;
  height: 20px;
  color: var(--gray-400);
}

/* --- Case Study --- */
.case-overview-inner {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.case-copy p {
  margin: 0 0 16px;
}

.case-copy p:last-child {
  margin-bottom: 0;
}

.case-aside h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 12px;
}

.case-aside .tag-list {
  margin-top: 12px;
}

.results-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.result-card {
  background: var(--gray-100);
  padding: 24px;
  border-radius: 8px;
  text-align: center;
}

.result-card span {
  display: block;
  font-family: 'Instrument Serif', serif;
  font-size: clamp(28px, 4vw, 36px);
  margin-bottom: 8px;
}

.result-card p {
  margin: 0;
  color: var(--gray-600);
}

/* --- Testimonial --- */
.case-testimonial .testimonial-block {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.testimonial-block {
  background: var(--gray-100);
  padding: 32px;
  border-radius: 8px;
}

.testimonial-quote {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 400;
  line-height: 1.4;
  margin: 0 0 16px;
  color: var(--black);
}

.testimonial-attribution {
  margin: 0;
  font-weight: 500;
  color: var(--black);
  font-size: 15px;
}

/* --- Design Demo --- */
.design-demo {
  display: grid;
  gap: 24px;
  padding: 24px;
  background: var(--gray-100);
  border-radius: 8px;
}

.design-demo__controls {
  display: grid;
  gap: 16px;
}

.design-demo__controls label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-weight: 600;
}

.design-demo__controls input[type="file"] {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px dashed var(--gray-200);
  background: var(--white);
  font: inherit;
}

.design-demo__hint {
  margin: 0;
  color: var(--gray-600);
}

.design-demo__sample-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.design-demo__sample-row button {
  border-radius: 6px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  color: var(--black);
  font-weight: 500;
  padding: 8px 16px;
  cursor: pointer;
  font: inherit;
  transition: background 0.2s;
}

.design-demo__sample-row button:hover {
  background: var(--gray-100);
}

.design-demo__viewport {
  --pos: 50%;
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  background: var(--gray-200);
  transition: opacity 0.2s;
}

.design-demo__viewport.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.design-demo__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.design-demo__image--after {
  clip-path: inset(0 calc(100% - var(--pos)) 0 0);
}

.design-demo__divider {
  position: absolute;
  inset: 0;
  left: calc(var(--pos) - 1px);
  width: 2px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}

.design-demo__range {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: col-resize;
}

.design-demo__viewport:has(.design-demo__range:focus-visible) .design-demo__divider {
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.3);
}

.design-demo__footnote {
  margin: 0;
  color: var(--gray-600);
  font-size: 15px;
}

/* --- Timeline Page --- */
.timeline-page {
  background:
    radial-gradient(1400px 520px at 100% 0%, rgba(0, 0, 0, 0.035), transparent 70%),
    var(--white);
}

.timeline-hero {
  border-top: none;
  padding-bottom: 44px;
}

.timeline-hero h1 {
  max-width: 740px;
}

.timeline-kicker {
  margin-bottom: 14px;
}

.timeline-metrics {
  margin-top: 36px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.timeline-metric {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 16px 18px;
  display: grid;
  gap: 6px;
}

.timeline-metric-label {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
}

.timeline-metric-value {
  margin: 0;
  color: var(--black);
  font-family: 'Instrument Serif', serif;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.1;
}

.timeline-controls {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.timeline-controls label {
  display: grid;
  gap: 8px;
}

.timeline-controls label span {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--gray-400);
}

.timeline-controls input,
.timeline-controls select {
  width: 100%;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  padding: 10px 12px;
  font: inherit;
}

.timeline-controls input:focus-visible,
.timeline-controls select:focus-visible {
  outline: 2px solid var(--black);
  outline-offset: 1px;
}

.timeline-results {
  margin-top: 16px;
  color: var(--gray-600);
  font-size: 15px;
}

.timeline-list {
  margin-top: 20px;
}

.timeline-month {
  position: relative;
  padding-left: 26px;
  margin-bottom: 36px;
}

.timeline-month:last-child {
  margin-bottom: 0;
}

.timeline-month::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  bottom: 2px;
  width: 1px;
  background: var(--gray-200);
}

.timeline-month-heading {
  position: sticky;
  top: 8px;
  z-index: 2;
  display: inline-block;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 999px;
  padding: 6px 12px;
  margin: 0 0 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--gray-600);
}

.timeline-month-list {
  display: grid;
  gap: 12px;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 14px;
}

.timeline-item-marker {
  position: relative;
  margin-top: 14px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  border: 2px solid var(--black);
  background: var(--white);
  z-index: 1;
}

.timeline-item-body {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 14px 16px;
  display: grid;
  gap: 8px;
}

.timeline-item.is-skipped .timeline-item-body {
  opacity: 0.72;
}

.timeline-item-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-600);
}

.timeline-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  color: var(--gray-600);
  padding: 3px 9px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
}

.timeline-chip-muted {
  background: transparent;
  border-style: dashed;
}

.timeline-item-headline {
  margin: 0;
  color: var(--black);
  font-size: 17px;
  line-height: 1.4;
  text-wrap: pretty;
}

a.timeline-item-headline {
  font-weight: 600;
}

a.timeline-item-headline:hover {
  text-decoration: underline;
}

.timeline-item-source {
  margin: 0;
  color: var(--gray-400);
  font-size: 13px;
}

.timeline-status {
  margin: 8px 0;
  color: var(--gray-600);
}

.timeline-load-more {
  margin-top: 20px;
}

/* --- Footer --- */
footer {
  padding: 40px 0;
  border-top: 1px solid var(--gray-200);
}

footer p {
  font-size: 14px;
  color: var(--gray-400);
}

/* --- Utility --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Animations --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1,
.hero-intro,
.hero-stats {
  animation: fadeUp 0.6s ease-out forwards;
}

.hero-intro {
  animation-delay: 0.1s;
}

.hero-stats {
  animation-delay: 0.2s;
}

/* --- Mobile --- */
@media (max-width: 600px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  nav {
    width: 100%;
    gap: 12px 20px;
    flex-wrap: wrap;
  }

  .hero {
    padding: 60px 0 40px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

  .contact-section h2 {
    font-size: 28px;
  }

  .cards-grid,
  .solutions-grid,
  .results-grid {
    grid-template-columns: 1fr;
  }

  .two-column {
    grid-template-columns: 1fr;
  }

  .solution-body {
    grid-template-columns: 1fr;
  }

  .case-meta {
    flex-direction: column;
  }

  .design-demo__sample-row {
    flex-direction: column;
  }

  .timeline-controls {
    grid-template-columns: 1fr;
  }

  .timeline-month {
    padding-left: 22px;
  }

  .timeline-month-heading {
    top: 4px;
  }

  .timeline-item {
    grid-template-columns: 12px 1fr;
    gap: 10px;
  }

  .timeline-item-marker {
    width: 10px;
    height: 10px;
    margin-top: 16px;
  }

  .timeline-item-body {
    padding: 12px 13px;
  }
}