/*
Theme Name: Kabankai
Theme URI: https://kabankai.com
Author: Kabankai
Description: Kabankai v2 — calm, clean, dual-palette crypto intelligence and education blog.
Version: 2.0.0
License: GNU General Public License v2 or later
Text Domain: kabankai
*/

/* =============================================
   DESIGN TOKENS
   ============================================= */
:root {

  /* Intelligence palette — deep indigo */
  --intel-primary:     #5252A0;
  --intel-primary-lt:  #E8E8F5;
  --intel-primary-dk:  #3A3A7A;
  --intel-primary-mid: #7070C0;
  --intel-bg:          #F8F8FB;
  --intel-bg-2:        #EFEFF6;
  --intel-bg-3:        #E4E4EE;
  --intel-void:        #18181E;
  --intel-void-2:      #22222C;
  --intel-border:      #D8D8E8;
  --intel-text:        #18181E;
  --intel-text-soft:   #52525A;
  --intel-muted:       #7878A8;
  --intel-muted-lt:    #A8A8C8;

  /* Learning palette — sage green */
  --learn-primary:     #3D7A62;
  --learn-primary-lt:  #E0EFE8;
  --learn-primary-dk:  #2A5E44;
  --learn-primary-mid: #5A9E80;
  --learn-bg:          #FAFAF7;
  --learn-bg-2:        #F0F0EB;
  --learn-bg-3:        #E4E4DC;
  --learn-void:        #1C2420;
  --learn-void-2:      #242E28;
  --learn-border:      #DDE4DF;
  --learn-text:        #1C2420;
  --learn-text-soft:   #5A6560;
  --learn-muted:       #8A9088;

  /* Shared — amber warmth */
  --amber:             #B87840;
  --amber-lt:          #F5F0E8;
  --amber-dk:          #7A5020;

  /* Signal semantic colours */
  --signal-acc:        #3A7A5A;
  --signal-acc-lt:     #E4F0EA;
  --signal-acc-dk:     #285240;
  --signal-obs:        #7878A8;
  --signal-obs-lt:     #EDEDF5;
  --signal-avd:        #B05050;
  --signal-avd-lt:     #F5E8E8;
  --signal-avd-dk:     #7A3030;

  /* Typography */
  --font-display:  'Urbanist', sans-serif;
  --font-body:     'Nunito', sans-serif;
  --font-mono:     'DM Mono', monospace;

  /* Weights */
  --w-display:  600;
  --w-heading:  600;
  --w-nav:      500;
  --w-body:     400;
  --w-emphasis: 600;
  --w-cta:      700;

  /* Radii */
  --r-sm:   10px;
  --r-md:   16px;
  --r-lg:   20px;
  --r-xl:   24px;
  --r-pill: 99px;

  /* Layout */
  --max-w:      1100px;
  --content-w:  680px;
  --nav-h:      60px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: var(--w-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--intel-text);
  background: var(--intel-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-learn {
  background: var(--learn-bg);
  color: var(--learn-text);
}

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

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

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--w-heading);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h3 { font-size: 1.1rem; letter-spacing: -0.01em; }
h4 { font-size: 1rem; }

p { margin-bottom: 1.5rem; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: var(--w-emphasis);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 14px;
}

/* =============================================
   LAYOUT
   ============================================= */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}

.content-wrap {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 40px;
}

.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;
}

/* =============================================
   READING PROGRESS BAR
   ============================================= */
#kbk-progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: rgba(0,0,0,0.06);
  z-index: 200;
}

#kbk-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--intel-primary);
  transition: width 0.1s linear;
}

body.is-learn #kbk-progress-bar {
  background: var(--learn-primary);
}

/* =============================================
   NAVIGATION
   ============================================= */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--intel-void);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.site-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--w-display);
  color: #fff;
  letter-spacing: -0.01em;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.site-logo img {
  height: 28px;
  width: auto;
}

/* Nav CTA */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: var(--w-cta);
  font-size: 13px;
  padding: 8px 18px;
  border-radius: var(--r-sm);
  border: none;
  cursor: pointer;
  transition: opacity 0.15s;
  text-decoration: none;
  line-height: 1;
}

.btn-amber {
  background: var(--amber);
  color: #fff;
}

.btn-amber:hover { opacity: 0.88; }

.btn-intel {
  background: var(--intel-primary);
  color: #fff;
}

.btn-intel:hover { opacity: 0.88; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(255,255,255,0.6);
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: currentColor;
  margin: 5px 0;
  transition: all 0.2s;
}

/* =============================================
   BLOG HERO — dot grid + line grid, indigo
   ============================================= */
.blog-hero {
  background-color: var(--intel-void);
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.07) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 24px 24px, 72px 72px, 72px 72px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 72px 40px 56px;
  position: relative;
  overflow: hidden;
}

.blog-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(82,82,160,0.1) 0%, transparent 60%);
  pointer-events: none;
}

.blog-hero .eyebrow {
  color: var(--intel-muted);
  position: relative;
  z-index: 1;
}

.blog-hero h1 {
  color: #fff;
  max-width: 520px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.blog-hero h1 em {
  color: var(--amber);
  font-style: normal;
}

.blog-hero .desc {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  max-width: 440px;
  line-height: 1.75;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

/* Category pills */
.cat-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cat-pill {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: var(--w-emphasis);
  padding: 5px 14px;
  border-radius: var(--r-pill);
  border: 1px solid;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  letter-spacing: 0.02em;
  display: inline-block;
}

.cat-pill-all {
  background: var(--amber);
  color: #fff;
  border-color: var(--amber);
}

.cat-pill-learn {
  border-color: rgba(61,122,98,0.5);
  color: #5DD4A8;
  background: rgba(61,122,98,0.12);
}

.cat-pill-intel {
  border-color: rgba(120,120,168,0.4);
  color: #A8A8D0;
  background: rgba(82,82,160,0.1);
}

.cat-pill-defi {
  border-color: rgba(184,120,64,0.4);
  color: #D4A06A;
  background: rgba(184,120,64,0.1);
}

.cat-pill:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* =============================================
   FEATURED POST
   ============================================= */
.featured-wrap {
  border-bottom: 1px solid var(--intel-border);
  background: var(--intel-bg);
}

.featured-post {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 40px;
}

.featured-label {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: var(--w-emphasis);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--intel-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.featured-label::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--intel-muted);
  flex-shrink: 0;
}

.featured-post h2 {
  max-width: 600px;
  color: var(--intel-text);
  margin-bottom: 12px;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
}

.featured-post h2 a {
  color: inherit;
  transition: color 0.15s;
}

.featured-post h2 a:hover {
  color: var(--intel-primary);
}

.featured-post .excerpt {
  font-size: 14px;
  color: var(--intel-text-soft);
  line-height: 1.75;
  max-width: 560px;
  margin-bottom: 20px;
}

.read-more {
  font-family: var(--font-body);
  font-weight: var(--w-cta);
  font-size: 12px;
  color: var(--intel-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
  transition: gap 0.2s;
}

.read-more:hover { gap: 12px; }
.read-more::after { content: '→'; }

.post-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--intel-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.meta-sep { opacity: 0.5; }

/* =============================================
   POST LIST
   ============================================= */
.post-list-wrap {
  background: var(--intel-bg);
  border-bottom: 1px solid var(--intel-border);
}

.post-list {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}

.post-list-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--intel-border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
}

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

.post-cat-badge {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: var(--w-emphasis);
  padding: 3px 10px;
  border-radius: var(--r-pill);
  display: inline-block;
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}

.badge-learn  { background: var(--signal-acc-lt); color: var(--signal-acc); }
.badge-signal { background: var(--signal-obs-lt); color: var(--intel-primary); }
.badge-defi   { background: var(--amber-lt);       color: var(--amber); }
.badge-news   { background: var(--intel-bg-2);     color: var(--intel-muted); }

.post-list-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  line-height: 1.28;
}

.post-list-item h3 a {
  color: var(--intel-text);
  transition: color 0.15s;
}

.post-list-item h3 a:hover {
  color: var(--intel-primary);
}

.post-list-item .excerpt {
  font-size: 13px;
  color: var(--intel-text-soft);
  line-height: 1.65;
  margin-bottom: 12px;
  max-width: 520px;
}

.post-list-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--intel-muted);
  display: flex;
  gap: 8px;
}

.post-list-type {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--intel-muted);
  white-space: nowrap;
  padding-top: 4px;
}

/* Pagination */
.pagination {
  padding: 32px 40px;
  display: flex;
  gap: 6px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-numbers {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--r-sm);
  color: var(--intel-muted);
  border: 1px solid var(--intel-border);
  transition: all 0.15s;
}

.page-numbers:hover,
.page-numbers.current {
  background: var(--intel-primary);
  color: #fff;
  border-color: var(--intel-primary);
}

/* =============================================
   NEWSLETTER STRIP
   ============================================= */
.nl-strip {
  background: var(--intel-void);
  padding: 56px 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.nl-strip-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.nl-strip h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 6px;
}

.nl-strip p {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 22px;
  max-width: 360px;
  line-height: 1.65;
}

.nl-form {
  display: flex;
  max-width: 400px;
}

.nl-form input[type="email"] {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-right: none;
  border-radius: var(--r-sm) 0 0 var(--r-sm);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  color: #fff;
  outline: none;
  transition: border-color 0.15s;
}

.nl-form input[type="email"]::placeholder {
  color: rgba(255,255,255,0.2);
}

.nl-form input[type="email"]:focus {
  border-color: rgba(255,255,255,0.3);
}

.nl-form button {
  background: var(--amber);
  color: #fff;
  border: none;
  font-family: var(--font-body);
  font-weight: var(--w-cta);
  font-size: 12px;
  padding: 10px 18px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.nl-form button:hover { opacity: 0.88; }

/* =============================================
   FOOTER
   ============================================= */
#site-footer {
  background: var(--intel-void);
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 20px 40px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: var(--w-display);
  color: rgba(255,255,255,0.2);
}

.footer-brand .accent { color: var(--amber); }

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  font-size: 12px;
  color: rgba(255,255,255,0.2);
  transition: color 0.15s;
}

.footer-links a:hover { color: rgba(255,255,255,0.5); }

.footer-copy {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255,255,255,0.15);
  letter-spacing: 0.05em;
}

/* =============================================
   SINGLE POST — SHARED
   ============================================= */
.post-progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  z-index: 200;
  transition: width 0.1s linear;
}

/* =============================================
   SIGNAL POST HEADER — dot grid, indigo
   ============================================= */
.signal-header {
  background-color: var(--intel-void);
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 20px 20px;
  padding: 56px 40px 48px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}

.signal-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(82,82,160,0.1) 0%, transparent 55%);
  pointer-events: none;
}

.signal-header .eyebrow {
  color: var(--intel-muted);
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 1;
}

.signal-header h1 {
  color: #fff;
  max-width: 600px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.signal-header .post-meta {
  color: rgba(255,255,255,0.3);
  position: relative;
  z-index: 1;
}

/* Direction badge in header */
.signal-direction-badge {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: var(--w-emphasis);
  padding: 3px 10px;
  border-radius: var(--r-pill);
  letter-spacing: 0.03em;
}

.dir-acc { background: rgba(58,122,90,0.2); color: #5DD4A8; }
.dir-obs { background: rgba(120,120,168,0.2); color: #A8A8D0; }
.dir-avd { background: rgba(176,80,80,0.2); color: #E8A0A0; }

/* =============================================
   SIGNAL POST BODY
   ============================================= */
.signal-body {
  background: var(--intel-bg);
  padding: 56px 0 80px;
}

.signal-body .content-wrap { }

.signal-section-label {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: var(--w-emphasis);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--intel-muted);
  margin-bottom: 10px;
  display: block;
}

.signal-body p {
  font-size: 14px;
  color: var(--intel-text-soft);
  line-height: 1.8;
  margin-bottom: 28px;
}

/* Direction card */
.direction-card {
  border-left: 3px solid var(--signal-acc);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 16px 20px;
  margin-bottom: 32px;
}

.direction-card-acc { background: var(--signal-acc-lt); border-color: var(--signal-acc); }
.direction-card-obs { background: var(--signal-obs-lt); border-color: var(--signal-obs); }
.direction-card-avd { background: var(--signal-avd-lt); border-color: var(--signal-avd); }

.direction-card-label {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: var(--w-emphasis);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal-acc);
  margin-bottom: 4px;
}

.direction-card-acc .direction-card-label { color: var(--signal-acc); }
.direction-card-obs .direction-card-label { color: var(--signal-obs); }
.direction-card-avd .direction-card-label { color: var(--signal-avd); }

.direction-card-value {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--w-display);
  color: var(--signal-acc-dk);
}

.direction-card-avd .direction-card-value { color: var(--signal-avd-dk); }
.direction-card-obs .direction-card-value { color: #3A3A7A; }

/* Teaser + gate */
.signal-teaser {
  position: relative;
  margin-bottom: 0;
}

.signal-teaser-text {
  font-size: 14px;
  color: var(--intel-text-soft);
  line-height: 1.8;
  filter: blur(4px);
  user-select: none;
  pointer-events: none;
  margin-bottom: 0;
}

.signal-gate {
  background: var(--intel-bg);
  border: 1px solid var(--intel-border);
  border-radius: var(--r-xl);
  padding: 32px 28px;
  text-align: center;
  margin-top: -56px;
  position: relative;
  z-index: 2;
}

.signal-gate .eyebrow {
  color: var(--intel-muted);
  display: block;
  text-align: center;
  margin-bottom: 10px;
}

.signal-gate h3 {
  font-size: 1.05rem;
  color: var(--intel-text);
  margin-bottom: 8px;
}

.signal-gate p {
  font-size: 13px;
  color: var(--intel-text-soft);
  line-height: 1.65;
  margin-bottom: 18px;
  max-width: 280px;
  margin-left: auto;
  margin-right: auto;
}

.signal-gate-note {
  font-size: 11px;
  color: var(--intel-muted);
  margin-top: 12px;
  font-family: var(--font-body);
}

/* =============================================
   LEARN POST HEADER — fine-line grid, sage
   ============================================= */
.learn-header {
  background-color: var(--learn-void);
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  padding: 56px 40px 48px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}

.learn-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgba(61,122,98,0.1) 0%, transparent 60%);
  pointer-events: none;
}

.learn-header .eyebrow {
  color: rgba(90,158,128,0.8);
  position: relative;
  z-index: 1;
}

.learn-header h1 {
  color: #fff;
  max-width: 600px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.learn-header .post-meta {
  color: rgba(255,255,255,0.3);
  position: relative;
  z-index: 1;
}

/* =============================================
   LEARN POST BODY
   ============================================= */
.learn-body {
  background: var(--learn-bg);
  padding: 56px 0 80px;
}

.learn-body p {
  font-size: 15px;
  color: var(--learn-text-soft);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.learn-body h2 {
  font-size: 1.2rem;
  color: var(--learn-text);
  margin: 2rem 0 0.75rem;
}

.learn-body h3 {
  font-size: 1rem;
  color: var(--learn-text);
  margin: 1.5rem 0 0.5rem;
}

/* Pull quote */
.pull-quote {
  border-left: 3px solid var(--learn-primary);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 18px 22px;
  margin: 2rem 0;
  background: var(--learn-bg-2);
}

.pull-quote p {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--w-display);
  line-height: 1.5;
  color: var(--learn-text);
  margin-bottom: 0;
}

/* Signal nudge at end of learn post */
.signal-nudge {
  background: var(--signal-obs-lt);
  border: 1px solid rgba(82,82,160,0.15);
  border-radius: var(--r-xl);
  padding: 24px 24px;
  margin-top: 2rem;
}

.signal-nudge .eyebrow {
  color: var(--intel-primary);
  margin-bottom: 8px;
}

.signal-nudge h4 {
  font-size: 0.95rem;
  color: var(--intel-text);
  margin-bottom: 6px;
}

.signal-nudge p {
  font-size: 13px;
  color: var(--intel-text-soft);
  line-height: 1.65;
  margin-bottom: 14px;
}

.signal-nudge-link {
  font-family: var(--font-body);
  font-weight: var(--w-cta);
  font-size: 12px;
  color: var(--intel-primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap 0.2s;
}

.signal-nudge-link:hover { gap: 10px; }
.signal-nudge-link::after { content: '→'; }

/* =============================================
   BACK TO TOP
   ============================================= */
#back-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 38px;
  height: 38px;
  background: var(--intel-primary);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-weight: var(--w-display);
  font-size: 15px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 50;
}

#back-top.visible {
  opacity: 1;
  pointer-events: all;
}

#back-top:hover { opacity: 0.88; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  :root { --nav-h: 56px; }

  .container,
  .post-list,
  .featured-post,
  .pagination,
  .nl-strip,
  #site-footer { padding-left: 20px; padding-right: 20px; }

  .blog-hero,
  .signal-header,
  .learn-header { padding: 44px 20px 36px; }

  .content-wrap { padding: 0 20px; }

  .nav-toggle { display: block; }

  .btn-amber.nav-cta { display: none; }

  .nl-form { flex-direction: column; }

  .nl-form input[type="email"] {
    border-right: 1px solid rgba(255,255,255,0.12);
    border-bottom: none;
    border-radius: var(--r-sm) var(--r-sm) 0 0;
  }

  .nl-form button {
    border-radius: 0 0 var(--r-sm) var(--r-sm);
    padding: 12px;
  }

  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }

  .footer-links { flex-wrap: wrap; justify-content: center; gap: 14px; }

  .post-list-item { grid-template-columns: 1fr; }
  .post-list-type { display: none; }

  .signal-gate { padding: 24px 20px; margin-top: -40px; }
}

@media (max-width: 480px) {
  .blog-hero h1 { font-size: 1.7rem; }
  .cat-pills { gap: 6px; }
  .cat-pill { font-size: 10px; padding: 4px 11px; }
}