/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #fafaf8;
  --color-bg-alt: #f4f3ef;
  --color-surface: #ffffff;
  --color-border: #e8e6e0;
  --color-text: #2c2c2a;
  --color-text-muted: #6b6b67;
  --color-text-light: #9b9b96;
  --color-accent: #5c7a6e;
  --color-accent-light: #e8f0ed;
  --color-accent-hover: #4a6459;
  --color-hero-overlay: rgba(20, 20, 18, 0.55);

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Lora', Georgia, serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);

  --nav-height: 64px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ===========================
   TYPOGRAPHY
=========================== */
h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #ffffff;
}

h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

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

/* ===========================
   LAYOUT
=========================== */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-intro {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* ===========================
   NAV
=========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

/* ===========================
   HERO
=========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 85% center;
}

@media (max-width: 640px) {
  .hero-bg img {
    object-position: 85% top;
  }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-hero-overlay);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: var(--nav-height);
}

.hero-text {
  max-width: 640px;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 400;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-style: italic;
  color: rgba(255,255,255,0.88);
  margin: 1.25rem 0 0.75rem;
  line-height: 1.5;
}

.hero-sub {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.05em;
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}

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

.btn-ghost {
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.25);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.2);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  color: rgba(255,255,255,0.5);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ===========================
   ABOUT
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 4rem;
}

.about-image img {
  width: 100%;
  border-radius: var(--radius-md);
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top center;
  box-shadow: var(--shadow-md);
}

@media (max-width: 900px) {
  .about-image img {
    aspect-ratio: 1/1;
    object-position: top center;
  }
}

.about-body h2 {
  margin-bottom: 1.5rem;
}

.about-traits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.trait {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
}

.philosophy-block {
  margin-bottom: 4rem;
}

.philosophy-block blockquote {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-style: italic;
  color: var(--color-text);
  border-left: 3px solid var(--color-accent);
  padding-left: 1.5rem;
  line-height: 1.6;
}

.how-i-think h3 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
}

.think-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.think-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: box-shadow var(--transition);
}

.think-card:hover {
  box-shadow: var(--shadow-md);
}

/* ===========================
   WORKING STYLE
=========================== */
.ws-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.ws-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
  transition: box-shadow var(--transition);
}

.ws-card:hover {
  box-shadow: var(--shadow-md);
}

.ws-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 1rem;
  font-family: var(--font-serif);
}

.quirks-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-bottom: 3rem;
}

.quirks-block h3 {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.quirks-list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.quirks-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.85rem;
}

.principles-block h3 {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.principle {
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
}

/* ===========================
   TIMELINE / JOURNEY
=========================== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 3rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2.375rem;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: box-shadow var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
}

.timeline-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.timeline-company {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
}

.timeline-period {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.timeline-content h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

.timeline-highlights {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.timeline-highlights li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.timeline-highlights li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 1.2rem;
  line-height: 1.4;
}

/* ===========================
   AI EXPLORATION
=========================== */
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.ai-main p {
  font-size: 1rem;
  line-height: 1.8;
}

.ai-interests h3 {
  font-size: 1rem;
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 600;
}

.ai-topic {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.ai-topic:last-child {
  border-bottom: none;
}

.ai-topic h4 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}

.ai-topic p {
  font-size: 0.875rem;
  margin: 0;
}

.ai-quote {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 1.5rem 2rem;
}

.ai-quote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--color-text);
  margin: 0;
}

/* ===========================
   THOUGHTS
=========================== */
.thoughts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.thought-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: box-shadow var(--transition);
}

.thought-card:hover {
  box-shadow: var(--shadow-md);
}

.thought-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.25rem 0.6rem;
  border-radius: 100px;
  align-self: flex-start;
}

.thought-card h3 {
  font-size: 1rem;
  line-height: 1.4;
  margin: 0;
}

.thought-card p {
  font-size: 0.875rem;
  flex: 1;
  margin: 0;
}

.thoughts-inline {
  margin-top: 3rem;
}

.thoughts-inline h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

/* ===========================
   CONTACT
=========================== */
.contact-container {
  max-width: 600px;
  text-align: center;
}

.contact-container h2 {
  margin-bottom: 1rem;
}

.contact-container p {
  margin-bottom: 2.5rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 0.875rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: all var(--transition);
  width: 100%;
  max-width: 360px;
  justify-content: center;
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

/* ===========================
   FOOTER
=========================== */
.footer {
  background: var(--color-text);
  padding: 2rem 0;
  text-align: center;
}

.footer p {
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
  margin: 0;
}

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-image {
    max-width: 260px;
  }

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

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

  .ai-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 1.5rem 1.5rem 2rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

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

  .nav-links a {
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn {
    width: fit-content;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-marker {
    left: -1.875rem;
  }

  .timeline-meta {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .contact-container {
    text-align: left;
  }

  .contact-links {
    align-items: flex-start;
  }

  .contact-link {
    justify-content: flex-start;
  }
}

.thought-meta {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-style: italic;
}

/* ===========================
   THOUGHTS PAGE
=========================== */
.thoughts-page-hero {
  padding: calc(var(--nav-height) + 3rem) 0 3rem;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.thoughts-page-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.thoughts-page-sub {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.nav-active {
  color: var(--color-text) !important;
  font-weight: 500;
}

/* View all link */
.thoughts-view-all {
  margin-top: 1.5rem;
  text-align: right;
}

.btn-view-all {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: color var(--transition);
}

.btn-view-all:hover {
  color: var(--color-accent-hover);
}

/* Loading / error states */
.thoughts-loading,
.thoughts-error {
  color: var(--color-text-light);
  font-size: 0.875rem;
  font-style: italic;
  grid-column: 1 / -1;
}

.thoughts-error code {
  background: var(--color-border);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: monospace;
}