/* ============================================================
   Vibe Diary — "Light Frequency" Technical Design
   ============================================================ */

/* === VARIABLES === */
:root {
  --bg:          #F5F4FB;
  --bg-card:     #FFFFFF;
  --bg-card-2:   #EEEDF8;
  --bg-raised:   #E6E5F5;

  /* JSON palette */
  --primary:     #4A4E69;
  --secondary:   #9A8C98;
  --accent:      #C9ADA7;
  --accent-dark: #8B6B65;

  --text:        #22223B;
  --text-muted:  #6B6882;
  --text-dim:    #A8A4B8;

  --border:      rgba(74, 78, 105, 0.11);
  --border-mid:  rgba(74, 78, 105, 0.2);
  --border-hi:   rgba(74, 78, 105, 0.42);

  --glow-p:      0 4px 24px rgba(74, 78, 105, 0.13);
  --glow-a:      0 6px 32px rgba(74, 78, 105, 0.16);
  --shadow:      0 4px 24px rgba(74, 78, 105, 0.1);
  --shadow-md:   0 8px 40px rgba(74, 78, 105, 0.14);

  --font-serif:  Georgia, 'Times New Roman', serif;
  --font-sans:   system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:   'SF Mono', 'Cascadia Code', 'Consolas', 'Menlo', monospace;

  --radius:    8px;
  --radius-sm: 4px;
  --transition: 0.22s ease;
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.7;
}

img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* === LAYOUT === */
.wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.text-content {
  max-width: 780px;
  margin: 0 auto;
}

/* === TYPOGRAPHY === */
h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--primary);
  line-height: 1.18;
  font-weight: 700;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.8rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.2rem); }
h3 { font-size: clamp(1rem, 1.8vw, 1.2rem); }

p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.78;
}

/* === HEADER === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 244, 251, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.logo-link img {
  height: 42px;
  width: auto;
  transition: opacity var(--transition);
}

.logo-link:hover img { opacity: 0.75; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-menu a {
  display: block;
  padding: 7px 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.nav-menu a:hover {
  color: var(--primary);
  border-color: var(--border-mid);
  background: var(--bg-card);
}

.nav-menu a.active {
  color: var(--primary);
  border-color: var(--border-hi);
  background: var(--bg-card);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}

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

.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  display: none;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 12px 32px 16px;
}

.mobile-nav.open { display: block; }
.mobile-nav ul { display: flex; flex-direction: column; gap: 2px; }

.mobile-nav a {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--primary);
  border-color: var(--border-mid);
}

/* === HERO === */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg);
}

/* Dot-grid background */
.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(
    circle,
    rgba(74, 78, 105, 0.13) 1px,
    transparent 1px
  );
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 90% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 90% at 50% 50%, black 40%, transparent 100%);
}

/* Corner brackets */
.hero-grid::before,
.hero-grid::after {
  content: '';
  position: absolute;
  width: 56px;
  height: 56px;
  border-color: rgba(74, 78, 105, 0.18);
  border-style: solid;
}

.hero-grid::before {
  top: 44px;
  left: 44px;
  border-width: 1px 0 0 1px;
}

.hero-grid::after {
  bottom: 44px;
  right: 44px;
  border-width: 0 1px 1px 0;
}

/* Scan-line */
.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--primary) 25%,
    var(--accent-dark) 50%,
    var(--primary) 75%,
    transparent 100%
  );
  opacity: 0.22;
  animation: scanDown 10s linear infinite;
}

@keyframes scanDown {
  0%   { top: 0%; opacity: 0; }
  5%   { opacity: 0.22; }
  95%  { opacity: 0.22; }
  100% { top: 100%; opacity: 0; }
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 80px 0 60px;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-dark);
  border: 1px solid rgba(139, 107, 101, 0.28);
  background: rgba(201, 173, 167, 0.1);
  border-radius: var(--radius-sm);
  padding: 6px 16px;
  margin-bottom: 30px;
}

.hero h1 em {
  font-style: italic;
  color: var(--secondary);
}

.hero-sub {
  margin-top: 20px;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--text-muted);
}

/* === INTRO SECTION === */
.intro-section {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.intro-section img {
  margin: 36px auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-mid);
  box-shadow: var(--shadow-md);
  max-height: 480px;
  object-fit: cover;
  width: 100%;
}

.intro-section p + p { margin-top: 18px; }

/* === PILLARS SECTION === */
.pillars-section {
  padding: 96px 0;
  background: var(--bg);
}

.pillars-header {
  text-align: center;
  margin-bottom: 52px;
}

.pillars-header h2 { margin-bottom: 12px; }
.pillars-header p { color: var(--text-muted); }

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.pillar-card:hover {
  border-color: var(--border-hi);
  box-shadow: var(--glow-a);
}

.pillar-stripe {
  height: 3px;
}

.pillar-card:nth-child(1) .pillar-stripe { background: var(--primary); }
.pillar-card:nth-child(2) .pillar-stripe { background: var(--secondary); }
.pillar-card:nth-child(3) .pillar-stripe { background: var(--accent-dark); }

.pillar-media {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.pillar-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.pillar-card:hover .pillar-media img { transform: scale(1.05); }

.pillar-num {
  position: absolute;
  bottom: 10px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.8);
  background: rgba(74, 78, 105, 0.55);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.pillar-body {
  padding: 22px 24px 26px;
  flex: 1;
}

.pillar-body h3 { margin-bottom: 9px; color: var(--primary); }
.pillar-body p { font-size: 0.94rem; }

/* === SLIDER SECTION === */
.vibe-slider-section {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.vibe-slider-section h2 { text-align: center; margin-bottom: 10px; }

.vibe-slider-section > .wrapper > p {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.slider-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border-mid);
  max-width: 960px;
  margin: 0 auto;
  box-shadow: var(--shadow);
}

.slider-track {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider-track img {
  flex-shrink: 0;
  width: 100%;
  height: 420px;
  object-fit: cover;
  pointer-events: none;
  user-select: none;
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
}

.slider-dot {
  width: 20px;
  height: 2px;
  background: var(--border-mid);
  border-radius: 1px;
  transition: background var(--transition), width var(--transition);
  cursor: default;
}

.slider-dot.active {
  background: var(--primary);
  width: 32px;
}

/* === ACCORDION === */
.accordeon-section {
  padding: 80px 0;
  background: var(--bg);
}

.accordeon-section h2 { text-align: center; margin-bottom: 48px; }

.accordeon {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  overflow: hidden;
}

.accordeon-item {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.accordeon-item:last-child { border-bottom: none; }
.accordeon-item[open] { background: var(--bg); }

.accordeon-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.accordeon-item summary::-webkit-details-marker { display: none; }

.accordeon-item summary::after {
  content: '+';
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--secondary);
  transition: transform var(--transition), color var(--transition);
}

.accordeon-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--primary);
}

.accordeon-content {
  padding: 0 22px 18px;
  border-top: 1px solid var(--border);
}

.accordeon-content p {
  margin-top: 16px;
  font-size: 0.95rem;
}

/* === PAGE HERO === */
.page-hero {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle, rgba(74, 78, 105, 0.08) 1px, transparent 1px
  );
  background-size: 28px 28px;
  pointer-events: none;
}

.page-hero h1 { position: relative; }
.page-hero p {
  position: relative;
  margin-top: 14px;
  font-size: 1.05rem;
}

/* === ARTICLES GRID === */
.articles-section {
  padding: 72px 0 96px;
  background: var(--bg);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.article-card:hover {
  border-color: var(--border-hi);
  box-shadow: var(--glow-a);
}

/* Article card image */
.article-card-img {
  height: 160px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg);
}

.article-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.article-card:hover .article-card-img img {
  transform: scale(1.06);
}

/* Article card body */
.article-card-body {
  padding: 20px 22px 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.article-card-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--secondary);
  margin-bottom: 9px;
}

.article-card h2 {
  font-size: clamp(0.88rem, 1.3vw, 1.05rem);
  color: var(--primary);
  line-height: 1.42;
  flex: 1;
  transition: color var(--transition);
}

.article-card:hover h2 { color: var(--accent-dark); }

.article-card-arrow {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color var(--transition), transform var(--transition);
}

.article-card:hover .article-card-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

/* === ARTICLE PAGE === */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent-dark));
  z-index: 200;
  transition: width 0.1s linear;
}

.article-hero {
  background: var(--bg-card);
  padding: 52px 0 56px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle, rgba(74, 78, 105, 0.07) 1px, transparent 1px
  );
  background-size: 28px 28px;
  pointer-events: none;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 22px;
  padding: 6px 12px;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), border-color var(--transition);
}

.back-link:hover {
  color: var(--primary);
  border-color: var(--border-hi);
}

.back-link svg { width: 14px; height: 14px; flex-shrink: 0; }

.article-hero h1 { position: relative; }

.article-body {
  padding: 68px 0 96px;
  background: var(--bg);
}

.article-body .text-content h2 {
  margin-top: 52px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-mid);
}

.article-body .text-content h2:first-child { margin-top: 0; }
.article-body .text-content p { margin-bottom: 20px; }
.article-body .text-content p:last-child { margin-bottom: 0; }

.article-body .text-content img {
  margin: 40px auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-mid);
  box-shadow: var(--shadow-md);
  width: 100%;
  object-fit: cover;
}

/* === EMOTIONAL AWARENESS PAGE === */
.awareness-hero {
  background: var(--bg-card);
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.awareness-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle, rgba(74, 78, 105, 0.07) 1px, transparent 1px
  );
  background-size: 28px 28px;
  pointer-events: none;
}

.awareness-hero h1 { position: relative; }

.awareness-body {
  padding: 68px 0 96px;
  background: var(--bg);
}

.awareness-body .text-content img {
  margin: 40px auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-mid);
  box-shadow: var(--shadow-md);
  width: 100%;
  object-fit: cover;
}

.awareness-body .text-content p { margin-bottom: 20px; }

/* Feature blocks */
.feature-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 44px;
}

.feature-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.feature-block:hover {
  border-color: var(--border-hi);
  box-shadow: var(--glow-p);
}

.feature-block:first-child { border-top: 3px solid var(--primary); }
.feature-block:last-child  { border-top: 3px solid var(--accent-dark); }

.feature-block h3 { color: var(--primary); margin-bottom: 8px; }
.feature-block p  { font-size: 0.93rem; margin: 0; }

/* === FOOTER === */
.site-footer {
  background: var(--primary);
  padding: 52px 0 28px;
}

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(245, 244, 251, 0.15);
}

.footer-logo-link img {
  height: 38px;
  width: auto;
  filter: invert(1);
  opacity: 0.85;
  transition: opacity var(--transition);
}

.footer-logo-link:hover img { opacity: 1; }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.footer-nav a {
  display: block;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: rgba(245, 244, 251, 0.6);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition);
}

.footer-nav a:hover {
  color: rgba(245, 244, 251, 0.95);
  border-color: rgba(245, 244, 251, 0.2);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: rgba(245, 244, 251, 0.5);
  white-space: nowrap;
  margin: 0;
}

.footer-bottom {
  text-align: center;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: rgba(245, 244, 251, 0.3);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .pillars-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .wrapper { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  .mobile-nav { padding: 10px 20px 14px; }

  .nav-menu { display: none; }
  .hamburger { display: flex; }

  .hero { min-height: 55vh; }
  .hero-inner { padding: 40px 0 32px; }

  .intro-section { padding: 56px 0; }
  .pillars-section { padding: 64px 0; }
  .pillars-header { margin-bottom: 36px; }
  .vibe-slider-section { padding: 56px 0; }
  .vibe-slider-section > .wrapper > p { margin-bottom: 32px; }
  .accordeon-section { padding: 56px 0; }
  .accordeon-section h2 { margin-bottom: 36px; }
  .awareness-hero { padding: 44px 0 32px; }
  .awareness-body { padding: 44px 0 52px; }
  .feature-blocks { gap: 14px; margin-top: 32px; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-blocks { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .pillars-grid  { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }

  .article-card-img { height: 200px; }

  .slider-track img { height: 240px; }
  .article-hero  { padding: 36px 0 44px; }
  .article-body  { padding: 44px 0 64px; }
  .page-hero     { padding: 52px 0 40px; }

  .hero { min-height: auto; }
  .hero-inner { padding: 32px 0 28px; }
  .hero-badge { margin-bottom: 18px; }
  .hero-sub { margin-top: 14px; }
  .hero-grid::before, .hero-grid::after { display: none; }

  .intro-section { padding: 36px 0; }
  .intro-section img { margin: 24px auto; }

  .pillars-section { padding: 36px 0; }
  .pillars-header { margin-bottom: 22px; }

  .vibe-slider-section { padding: 36px 0; }
  .vibe-slider-section > .wrapper > p { margin-bottom: 20px; }

  .accordeon-section { padding: 36px 0; }
  .accordeon-section h2 { margin-bottom: 24px; }

  .awareness-hero { padding: 32px 0 24px; }
  .awareness-body { padding: 32px 0 36px; }
  .awareness-body .text-content p { margin-bottom: 14px; }
  .feature-blocks { gap: 12px; margin-top: 28px; }
}