/* ============================================================
   DESIGN TOKENS
============================================================ */
:root {
  /* Backgrounds */
  --color-bg:           #F8FBFE;
  --color-bg-subtle:    #EDF5FB;
  --color-bg-inset:     #DDE9F4;

  /* Accent — calm blue */
  --color-accent:       #57B9FF;
  --color-accent-light: #90D5FF;
  --color-accent-mid:   #77B1D4;
  --color-accent-dark:  #517891;

  /* Text */
  --color-text-primary:   #1A2733;
  --color-text-secondary: #3D5970;
  --color-text-muted:     #6E8FA8;

  /* UI */
  --color-border:       #C8DFF0;
  --color-white:        #FFFFFF;
  --color-bg-dark:      #17304A;

  /* Typography */
  --font-serif:  'Playfair Display', Georgia, serif;
  --font-sans:   'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Type Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  clamp(1.75rem, 4vw, 2.25rem);
  --text-4xl:  clamp(2.25rem, 6vw, 3.5rem);
  --text-5xl:  clamp(2.75rem, 8vw, 4.75rem);

  /* Font weights */
  --weight-regular: 400;
  --weight-medium:  500;
  --weight-semi:    600;
  --weight-bold:    700;

  /* Line heights */
  --leading-tight:   1.15;
  --leading-snug:    1.4;
  --leading-normal:  1.6;
  --leading-relaxed: 1.8;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --section-py:    clamp(4rem, 8vw, 7rem);
  --container-px:  clamp(1.25rem, 5vw, 2rem);
  --container-max: 1100px;

  /* Radii */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-card:       0 2px 8px rgba(28, 26, 23, 0.06), 0 1px 2px rgba(28, 26, 23, 0.04);
  --shadow-card-hover: 0 8px 28px rgba(28, 26, 23, 0.10), 0 2px 8px rgba(28, 26, 23, 0.06);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}


/* ============================================================
   TYPOGRAPHY
============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

p {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

p + p {
  margin-top: var(--space-4);
}


/* ============================================================
   LAYOUT UTILITIES
============================================================ */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

section {
  padding-block: var(--section-py);
}

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-title {
  font-size: var(--text-3xl);
  text-decoration: underline wavy var(--color-accent-light);
  text-underline-offset: 6px;
}

.section-subtitle {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
  max-width: 600px;
}

.section-header-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.section-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.section-link:hover {
  color: var(--color-accent-dark);
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark);
}


/* ============================================================
   BUTTONS
============================================================ */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-pill);
  transition: all var(--transition-base);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1.5px solid var(--color-border);
  color: var(--color-text-secondary);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}


/* ============================================================
   NAVIGATION
============================================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(253, 250, 246, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-bottom var(--transition-base), box-shadow var(--transition-base);
}

#site-header.scrolled {
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 12px rgba(28, 26, 23, 0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  align-items: center;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 1.5px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Mobile hamburger */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: 110;
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-mobile-toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-mobile-toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (max-width: 767px) {
  .nav-mobile-toggle {
    display: flex;
  }

  #main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6) var(--container-px) var(--space-8);
    transform: translateY(-110%);
    opacity: 0;
    transition: transform var(--transition-slow), opacity var(--transition-slow);
    z-index: 99;
  }

  #main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
  }

  .nav-links a {
    font-size: var(--text-lg);
  }
}


@media (max-width: 767px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
  }

  .hero-intro {
    max-width: 100%;
  }

  .hero-cta {
    justify-content: center;
  }
}


/* ============================================================
   HERO
============================================================ */
#hero {
  min-height: calc(92vh - 64px);
  display: flex;
  align-items: center;
  padding-block: var(--space-20);
}

.hero-container {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
}

.hero-photo-wrap {
  position: relative;
  flex-shrink: 0;
}

.hero-photo-wrap::before {
  content: '';
  position: absolute;
  inset: -12%;
  background-color: var(--color-bg-inset);
  border-radius: 50%;
  z-index: 0;
}

.hero-photo-circle {
  width: clamp(200px, 24vw, 300px);
  height: clamp(200px, 24vw, 300px);
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  position: relative;
  z-index: 1;
  display: block;
}

.hero-text {
  flex: 1;
  min-width: 0;
}

.hero-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero-name {
  font-size: var(--text-5xl);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: var(--weight-regular);
  color: var(--color-text-secondary);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-6);
}

.hero-intro {
  font-size: var(--text-lg);
  max-width: 520px;
  margin-bottom: var(--space-10);
  color: var(--color-text-secondary);
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}


/* ============================================================
   ABOUT
============================================================ */
#about {
  background-color: var(--color-bg-subtle);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .about-layout {
    grid-template-columns: 1fr 320px;
    gap: var(--space-16);
    align-items: start;
  }
}

.about-bio {
  margin-bottom: var(--space-8);
}

.about-bio p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

/* Bridge sentence */
.about-bridge {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

/* Facts */
.about-facts {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.fact-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.fact-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  padding-top: 2px;
}

.fact-value {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}

.fact-value a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.fact-value a:hover {
  color: var(--color-accent-dark);
}


/* ============================================================
   BLOG
============================================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1023px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 639px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

.blog-card {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.blog-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.blog-card.featured {
  grid-column: span 2;
  background-color: var(--color-bg-inset);
}

@media (max-width: 1023px) {
  .blog-card.featured {
    grid-column: span 2;
  }
}

@media (max-width: 639px) {
  .blog-card.featured {
    grid-column: span 1;
  }
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card-tag {
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark);
}

.card-date {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.card-title {
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  flex-grow: 1;
}

.blog-card.featured .card-title {
  font-size: var(--text-2xl);
}

.card-excerpt {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  flex-grow: 1;
}

.card-read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  margin-top: auto;
  transition: color var(--transition-fast);
}

.card-read-more:hover {
  color: var(--color-accent-dark);
}

.card-read-more .arrow {
  display: inline-block;
  transition: transform var(--transition-base);
}

.card-read-more:hover .arrow {
  transform: translateX(4px);
}


/* ============================================================
   TOOLS
============================================================ */
#tools {
  background-color: var(--color-bg-subtle);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.tool-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.tool-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.tool-icon {
  font-size: 1.75rem;
  line-height: 1;
}

.tool-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.tool-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background-color: var(--color-bg-inset);
  color: var(--color-text-secondary);
  width: fit-content;
}

.tool-name {
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
}

.tool-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.tool-footer {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.tool-stack {
  font-family: 'Courier New', Courier, monospace;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}


/* ============================================================
   NEWSLETTER
============================================================ */
#newsletter {
  background-color: var(--color-bg-inset);
}

.newsletter-card {
  max-width: 600px;
  margin-inline: auto;
  text-align: center;
}

.newsletter-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.newsletter-body {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  color: var(--color-text-secondary);
}

.newsletter-form {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.newsletter-form input[type="email"] {
  flex: 1;
  min-width: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  padding: 0.75rem 1.25rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-pill);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  transition: border-color var(--transition-base);
  outline: none;
}

.newsletter-form input[type="email"]::placeholder {
  color: var(--color-text-muted);
}

.newsletter-form input[type="email"]:focus {
  border-color: var(--color-accent);
}

.newsletter-fine {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 480px) {
  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form .btn {
    width: 100%;
    text-align: center;
  }
}


/* ============================================================
   FOOTER
============================================================ */
#site-footer {
  background-color: var(--color-bg-dark);
  padding-block: var(--space-12);
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--color-bg);
  font-weight: var(--weight-bold);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-bg-inset);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-light);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  width: 100%;
  text-align: right;
}

@media (max-width: 639px) {
  .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-copy {
    text-align: left;
  }

}


/* ============================================================
   BLOG POST PAGE
============================================================ */
.post-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  padding-block: var(--space-8);
  transition: color var(--transition-fast);
}

.post-back:hover {
  color: var(--color-accent-dark);
}

.post-back .arrow {
  display: inline-block;
  transition: transform var(--transition-base);
}

.post-back:hover .arrow {
  transform: translateX(-3px);
}

.post-header {
  padding-block: clamp(2.5rem, 6vw, 5rem) var(--space-12);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.post-header .card-meta {
  margin-bottom: var(--space-6);
}

.post-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: var(--leading-tight);
  max-width: 780px;
  margin-bottom: var(--space-6);
}

.post-intro {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 660px;
  line-height: var(--leading-relaxed);
}

.post-hero-img {
  max-width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin: var(--space-8) 0;
  display: block;
}

.post-body {
  max-width: 700px;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.post-body p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.post-body h2 {
  font-size: var(--text-2xl);
  margin-top: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-5);
  color: var(--color-text-primary);
}

.post-body h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

.post-body ul,
.post-body ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.post-body ul {
  list-style: disc;
}

.post-body ol {
  list-style: decimal;
}

.post-body li {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.post-body li strong {
  color: var(--color-text-primary);
}

.post-body strong {
  color: var(--color-text-primary);
  font-weight: var(--weight-semi);
}

.post-body em {
  font-style: italic;
}

.post-body a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-body a:hover {
  color: var(--color-accent);
}

.post-footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-10);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  max-width: 700px;
}

.post-footer-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.post-footer-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

.post-footer-back:hover {
  color: var(--color-accent-dark);
}


/* ============================================================
   SCROLL REVEAL ANIMATIONS
============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }
.reveal[data-delay="5"] { transition-delay: 400ms; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn-primary:hover,
  .blog-card:hover,
  .tool-card:hover {
    transform: none;
  }
}