/* ============================================================
   THE FIELD NOTES PROJECT — STYLES
   Minimal. Disciplined. Timeless.
   ============================================================ */

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

:root {
  --bg:         #F5F3EF;
  --bg-dark:    #EDEAE4;
  --ink:        #111111;
  --ink-mid:    #444444;
  --ink-light:  #777777;
  --ink-faint:  #AAAAAA;
  --olive:      #4E5B3A;
  --olive-lt:   #6B7A52;
  --rule:       #D8D4CC;
  --rule-dark:  #BFBAAF;
  --white:      #FFFFFF;

  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', Arial, Helvetica, sans-serif;

  --max-width: 1120px;
  --gutter: 2rem;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.2;
  color: var(--ink);
  font-weight: 600;
}

p {
  color: var(--ink-mid);
  margin-bottom: 1.25rem;
}

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

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

.section {
  padding: 5rem 0;
}

/* ---- Section Labels ---- */
.section-label {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--olive);
  margin-bottom: 0.75rem;
}

.section-heading {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 2rem;
  font-weight: 600;
}

.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.section-header-row .section-heading {
  margin-bottom: 0;
}

/* ---- Text Links ---- */
.text-link {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--olive);
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: opacity 0.2s;
  white-space: nowrap;
}
.text-link:hover { opacity: 0.65; }
.text-link.small { font-size: 0.75rem; }

/* ---- Buttons ---- */
.btn-primary {
  display: inline-block;
  background-color: var(--ink);
  color: var(--bg);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.875rem 2rem;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
  text-decoration: none;
}
.btn-primary:hover {
  background-color: var(--olive);
  border-color: var(--olive);
  color: var(--white);
}

.btn-secondary {
  display: inline-block;
  background-color: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.875rem 2rem;
  border: 1px solid var(--rule-dark);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  text-decoration: none;
}
.btn-secondary:hover {
  border-color: var(--ink);
  background-color: var(--bg-dark);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 72px;
  gap: 1rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  min-width: 0;
  overflow: hidden;
}

.nav-logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mid);
  transition: color 0.2s;
}

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

.nav-links a.active {
  font-weight: 500;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--ink);
  transition: transform 0.25s, opacity 0.25s;
}

/* ============================================================
   HERO — HOME
   ============================================================ */
.hero {
  padding: 7rem 0 6rem;
  border-bottom: 1px solid var(--rule);
}

.hero-content {
  max-width: 680px;
}

.hero-overline {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--olive);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  margin-bottom: 1.25rem;
  color: var(--ink);
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--ink-mid);
  margin-bottom: 2rem;
}

.hero-rule {
  width: 48px;
  height: 1px;
  background-color: var(--rule-dark);
  margin-bottom: 2rem;
}

.hero-body {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 0;
}

/* ============================================================
   PAGE HEADER (inner pages)
   ============================================================ */
.page-header {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--rule);
}

.page-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.page-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--ink-mid);
  margin-bottom: 0;
}

/* ============================================================
   PILLARS — HOME
   ============================================================ */
.pillars {
  border-bottom: 1px solid var(--rule);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
}

.pillar-card {
  display: block;
  padding: 2.5rem;
  border-right: 1px solid var(--rule);
  transition: background-color 0.2s;
  text-decoration: none;
}

.pillar-card:last-child {
  border-right: none;
}

.pillar-card:hover {
  background-color: var(--bg-dark);
}

.pillar-number {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  margin-bottom: 1.25rem;
}

.pillar-title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--ink);
}

.pillar-desc {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

.pillar-link {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--olive);
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

/* ============================================================
   WRITING PREVIEW — HOME
   ============================================================ */
.writing-preview {
  border-bottom: 1px solid var(--rule);
}

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

.writing-card {
  display: flex;
  flex-direction: column;
}

.writing-tag {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--olive);
  margin-bottom: 0.875rem;
  display: block;
}

.writing-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.875rem;
  line-height: 1.3;
}

.writing-excerpt {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 1.25rem;
}

/* ============================================================
   TOOL PREVIEW — HOME
   ============================================================ */
.tool-preview {
  background-color: var(--bg-dark);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.tool-preview-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.tool-preview-text p {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.tool-meta-card {
  border: 1px solid var(--rule-dark);
  background-color: var(--bg);
  padding: 2rem;
}

.tool-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  gap: 1rem;
}

.tool-meta-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-light);
}

.tool-meta-value {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--ink);
  text-align: right;
}

.tool-meta-divider {
  height: 1px;
  background-color: var(--rule);
}

/* ============================================================
   EMAIL SIGNUP — HOME
   ============================================================ */
.signup-section {
  border-bottom: 1px solid var(--rule);
}

.signup-inner {
  max-width: 640px;
}

.signup-desc {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.signup-form-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.signup-form-row input[type="text"],
.signup-form-row input[type="email"] {
  flex: 1;
  min-width: 180px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--rule-dark);
  padding: 0.875rem 1.125rem;
  outline: none;
  transition: border-color 0.2s;
}

.signup-form-row input:focus {
  border-color: var(--ink);
}

.signup-note {
  font-size: 0.75rem;
  color: var(--ink-faint);
  margin-top: 0.75rem;
  margin-bottom: 0;
}

/* ============================================================
   NOTEBOOKS PAGE
   ============================================================ */
.notebook-section {
  border-bottom: 1px solid var(--rule);
}

.notebook-header {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 2rem;
}

.notebook-number {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  padding-top: 0.5rem;
  min-width: 2rem;
}

.notebook-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.notebook-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.0625rem;
  color: var(--ink-mid);
  margin-bottom: 0;
}

.notebook-desc {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.8;
  max-width: 700px;
  margin-bottom: 3rem;
}

.notebook-divider {
  height: 1px;
  background: var(--rule);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}

.article-card {
  padding: 2.5rem;
  border: 1px solid var(--rule);
  margin: -1px -1px 0 0;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.article-category {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--olive);
}

.article-date {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.875rem;
  line-height: 1.3;
}

.article-excerpt {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.7;
  margin-bottom: 0;
}

.article-rule {
  display: none;
}

/* ============================================================
   PODCAST PAGE
   ============================================================ */
.podcast-intro {
  border-bottom: 1px solid var(--rule);
}

.podcast-intro-inner {
  max-width: 680px;
}

.podcast-intro-inner p {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.8;
}

.podcast-platforms {
  padding: 3rem 0;
  border-bottom: 1px solid var(--rule);
}

.platform-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.platform-link {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--rule-dark);
  padding: 0.625rem 1.25rem;
  transition: border-color 0.2s, background-color 0.2s;
}

.platform-link:hover {
  border-color: var(--ink);
  background-color: var(--bg-dark);
}

.episodes-section {
  border-bottom: 1px solid var(--rule);
}

.episodes-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.episode-card {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--rule);
}

.episode-card:last-child {
  border-bottom: none;
}

.episode-header {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 1.25rem;
}

.episode-number-badge {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  padding-top: 0.375rem;
  min-width: 3rem;
  flex-shrink: 0;
}

.episode-title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.episode-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-light);
}

.meta-dot {
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background-color: var(--ink-faint);
}

.episode-desc {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.75;
  max-width: 720px;
  margin-bottom: 1.5rem;
  padding-left: 5rem;
}

.episode-footer {
  padding-left: 5rem;
}

/* ============================================================
   FIELD TOOLS PAGE
   ============================================================ */
.tools-intro {
  border-bottom: 1px solid var(--rule);
}

.tools-intro-inner {
  max-width: 680px;
}

.tools-intro-inner p {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.8;
}

.tools-section {
  border-bottom: 1px solid var(--rule);
}

.tools-category-header {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 3rem;
}

.tools-cat-number {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  padding-top: 0.625rem;
  min-width: 2rem;
}

.tools-category-title {
  font-size: clamp(1.625rem, 3vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.tools-category-desc {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--ink-mid);
  margin-bottom: 0;
}

.tools-divider {
  height: 1px;
  background: var(--rule);
}

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

.tool-card {
  border: 1px solid var(--rule);
  background-color: var(--bg);
}

.tool-card-featured {
  border-color: var(--ink);
}

.tool-card-inner {
  padding: 2.25rem;
}

.tool-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.tool-tag {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--olive);
}

.tool-format {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.tool-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.875rem;
  line-height: 1.3;
}

.tool-description {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

.tool-specs {
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
}

.tool-spec-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-size: 0.8125rem;
  border-bottom: 1px solid var(--rule);
}

.tool-spec-row:last-child {
  border-bottom: none;
}

.tool-spec-row span:first-child {
  color: var(--ink-light);
  font-weight: 400;
}

.tool-spec-row span:last-child {
  color: var(--ink);
  font-weight: 500;
}

/* ============================================================
   ABOUT PAGE
   ============================================================ */
.about-section {
  border-bottom: 1px solid var(--rule);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 5rem;
  align-items: start;
}

.about-text .section-heading {
  margin-bottom: 1.5rem;
}

.about-text p {
  font-size: 1.0625rem;
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.about-sidebar-card {
  border: 1px solid var(--rule);
  padding: 2rem;
  position: sticky;
  top: 96px;
}

.sidebar-section {
  padding: 0.75rem 0;
}

.sidebar-label {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 0.375rem;
}

.sidebar-value {
  font-size: 0.9375rem;
  color: var(--ink);
  margin-bottom: 0;
}

.sidebar-divider {
  height: 1px;
  background: var(--rule);
}

.mission-section {
  border-bottom: 1px solid var(--rule);
  background-color: var(--bg-dark);
}

.mission-inner {
  max-width: 760px;
}

.mission-text p {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.mission-convictions {
  margin-top: 2.5rem;
  border-top: 1px solid var(--rule);
}

.conviction-item {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--rule);
}

.conviction-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--ink-faint);
  min-width: 2rem;
  padding-top: 0.125rem;
}

.conviction-text {
  font-size: 1rem;
  color: var(--ink-mid);
  line-height: 1.75;
}

.conviction-text strong {
  color: var(--ink);
  font-weight: 600;
}

.intent-section {
  border-bottom: 1px solid var(--rule);
}

.intent-inner {
  max-width: 720px;
}

.intent-inner p {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.intent-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact-section {
  border-bottom: 1px solid var(--rule);
}

.contact-inner {
  max-width: 680px;
}

.contact-desc {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  margin-bottom: 2.5rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mid);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--rule-dark);
  padding: 0.875rem 1.125rem;
  outline: none;
  transition: border-color 0.2s;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--ink);
}

#formStatus p {
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--bg-dark);
  border-top: 1px solid var(--rule);
  padding: 4rem 0 2.5rem;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 3rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.footer-tagline {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-light);
  margin-bottom: 0;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  align-items: center;
}

.footer-nav a {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mid);
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: var(--ink);
}

.footer-bottom {
  border-top: 1px solid var(--rule);
  padding-top: 1.75rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--ink-faint);
  margin-bottom: 0;
}

/* ============================================================
   RESPONSIVE — TABLET
   ============================================================ */
@media (max-width: 900px) {
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .pillar-card {
    border-right: none;
    border-bottom: 1px solid var(--rule);
  }
  .pillar-card:last-child {
    border-bottom: none;
  }

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

  .tool-preview-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-card {
    margin: 0;
    border: none;
    border-bottom: 1px solid var(--rule);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-sidebar-card {
    position: static;
  }

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

/* ============================================================
   RESPONSIVE — MOBILE
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --gutter: 1.25rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .hero {
    padding: 4.5rem 0 3.5rem;
  }

  .page-header {
    padding: 3.5rem 0 2.5rem;
  }

  /* Nav mobile */
  .nav-inner {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0;
    z-index: 99;
  }

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

  .nav-links li {
    width: 100%;
    border-bottom: 1px solid var(--rule);
  }

  .nav-links a {
    display: block;
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
  }

  /* Writing grid */
  .writing-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Signup form */
  .signup-form-row {
    flex-direction: column;
  }

  .signup-form-row input {
    width: 100%;
    min-width: unset;
  }

  /* Form row */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Episode indentation */
  .episode-desc,
  .episode-footer {
    padding-left: 0;
  }

  .episode-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-nav {
    gap: 0.5rem 1.5rem;
  }

  /* Conviction layout */
  .conviction-item {
    gap: 1rem;
  }

  /* Intent CTA */
  .intent-cta {
    flex-direction: column;
  }

  .intent-cta .btn-primary,
  .intent-cta .btn-secondary {
    text-align: center;
  }

  /* Tool meta */
  .tool-preview-inner {
    gap: 2.5rem;
  }
}