/**
 * KoreaRising — Production Stylesheet
 * 
 * Design Philosophy:
 * - Rest of World: Clean, premium editorial typography, generous white space, uncluttered layout
 * - Fast Company: Clear content hierarchy, lead hero vs secondary stories, category grids
 * - Modern Korean Identity: Dominant white (70-80%), near-black text, Korean Red (#CD2E3A) & Blue (#0047A0) accents
 *
 * @package KoreaRising
 */

/* ========================================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ======================================================== */
:root {
  /* Colors */
  --kr-white: #ffffff;
  --kr-bg-light: #f9fafb;
  --kr-bg-subtle: #f3f4f6;
  --kr-text-black: #111827;
  --kr-text-nearblack: #1f2937;
  --kr-text-body: #374151;
  --kr-text-muted: #6b7280;
  --kr-text-light: #9ca3af;
  --kr-border: #e5e7eb;
  --kr-border-dark: #d1d5db;

  /* National Korean Accent Colors (Taegeuk) */
  --kr-red: #cd2e3a;
  --kr-red-hover: #b22530;
  --kr-red-light: #fef2f2;
  --kr-blue: #0047a0;
  --kr-blue-hover: #00367a;
  --kr-blue-light: #eff6ff;

  /* Typography */
  --kr-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --kr-font-serif: 'Newsreader', Georgia, Cambria, 'Times New Roman', serif;
  --kr-font-display: 'Outfit', var(--kr-font-sans);

  /* Layout */
  --kr-container-width: 1240px;
  --kr-container-narrow: 840px;
  --kr-header-height: 72px;
  --kr-radius-sm: 4px;
  --kr-radius-md: 8px;
  --kr-radius-lg: 12px;

  /* Transitions */
  --kr-transition-fast: 0.15s ease;
  --kr-transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --kr-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --kr-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --kr-shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.08);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--kr-white);
  color: var(--kr-text-body);
  font-family: var(--kr-font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--kr-transition-fast);
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* Screen reader accessible */
.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;
}

/* ========================================================
   3. LAYOUT & CONTAINERS
   ======================================================== */
.kr-container {
  width: 100%;
  max-width: var(--kr-container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.kr-container--narrow {
  max-width: var(--kr-container-narrow);
}

.kr-section {
  padding-top: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--kr-border);
}

.kr-section:last-of-type {
  border-bottom: none;
}

.kr-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--kr-text-black);
}

.kr-section-title {
  font-family: var(--kr-font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--kr-text-black);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}

.kr-section-title::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--kr-red);
  border-radius: 50%;
}

.kr-section-title--blue::before {
  background-color: var(--kr-blue);
}

.kr-section-viewall {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--kr-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: transform var(--kr-transition-fast);
}

.kr-section-viewall:hover {
  color: var(--kr-red);
  transform: translateX(3px);
}

/* Grids */
.kr-grid {
  display: grid;
  gap: 28px;
}

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

.kr-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.kr-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ========================================================
   4. EDITORIAL BADGES & LABELS
   ======================================================== */
.kr-badge {
  display: inline-block;
  font-family: var(--kr-font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 2px;
  background-color: var(--kr-bg-subtle);
  color: var(--kr-text-nearblack);
  transition: background-color var(--kr-transition-fast), color var(--kr-transition-fast);
}

.kr-badge:hover {
  background-color: var(--kr-text-black);
  color: var(--kr-white);
}

.kr-badge--red {
  color: var(--kr-red);
  background-color: var(--kr-red-light);
}

.kr-badge--red:hover {
  background-color: var(--kr-red);
  color: var(--kr-white);
}

.kr-badge--blue {
  color: var(--kr-blue);
  background-color: var(--kr-blue-light);
}

.kr-badge--blue:hover {
  background-color: var(--kr-blue);
  color: var(--kr-white);
}

/* Meta Data */
.kr-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--kr-text-muted);
}

.kr-meta-dot {
  font-size: 0.5rem;
  opacity: 0.6;
}

.kr-meta-author {
  font-weight: 600;
  color: var(--kr-text-nearblack);
}

/* ========================================================
   5. TOPBAR & HEADER
   ======================================================== */
.kr-site-header {
  background-color: var(--kr-white);
  border-bottom: 1px solid var(--kr-border);
  position: relative;
  z-index: 1000;
}

.kr-header--sticky {
  position: sticky;
  top: 0;
  box-shadow: var(--kr-shadow-sm);
}

/* Topbar */
.kr-topbar {
  background-color: var(--kr-bg-light);
  border-bottom: 1px solid var(--kr-border);
  font-size: 0.75rem;
  color: var(--kr-text-muted);
  padding: 6px 0;
}

.kr-topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kr-topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.kr-edition-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--kr-text-nearblack);
}

.kr-edition-flag {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--kr-red) 50%, var(--kr-blue) 50%);
}

.kr-topbar-date {
  color: var(--kr-text-muted);
}

.kr-topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.kr-topbar-link {
  font-weight: 500;
  color: var(--kr-text-muted);
}

.kr-topbar-link:hover {
  color: var(--kr-text-black);
}

/* Main Navbar */
.kr-navbar {
  padding: 16px 0;
}

.kr-navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand Wordmark */
.kr-brand {
  display: flex;
  flex-direction: column;
}

.kr-brand-wordmark {
  font-family: var(--kr-font-display);
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--kr-text-black);
  line-height: 1;
  text-transform: uppercase;
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}

.kr-brand-dot {
  color: var(--kr-red);
}

.kr-brand-tagline {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--kr-text-muted);
  margin-top: 2px;
}

/* Nav Menu */
.kr-nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.kr-nav-link {
  font-family: var(--kr-font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--kr-text-nearblack);
  position: relative;
  padding: 6px 0;
}

.kr-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--kr-red);
  transition: width var(--kr-transition-fast);
}

.kr-nav-link:hover {
  color: var(--kr-red);
}

.kr-nav-link:hover::after,
.kr-nav-link.current-menu-item::after {
  width: 100%;
}

/* Header Utilities */
.kr-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kr-btn-icon {
  background: none;
  border: 1px solid var(--kr-border);
  padding: 8px;
  border-radius: var(--kr-radius-sm);
  cursor: pointer;
  color: var(--kr-text-nearblack);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--kr-transition-fast);
}

.kr-btn-icon:hover {
  background-color: var(--kr-bg-light);
  border-color: var(--kr-border-dark);
  color: var(--kr-text-black);
}

.kr-btn-newsletter-nav {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--kr-radius-sm);
  background-color: var(--kr-text-black);
  color: var(--kr-white);
  transition: background-color var(--kr-transition-fast);
}

.kr-btn-newsletter-nav:hover {
  background-color: var(--kr-red);
}

.kr-mobile-toggle {
  display: none;
}

/* ========================================================
   6. HERO EDITORIAL SECTION (Rest of World + Fast Company)
   ======================================================== */
.kr-hero-grid {
  padding-top: 36px;
}

.kr-hero-layout {
  display: grid;
  grid-template-columns: 7.5fr 4.5fr;
  gap: 36px;
}

/* Lead Major Story */
.kr-card-hero {
  display: flex;
  flex-direction: column;
}

.kr-card-hero-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--kr-radius-sm);
  background-color: var(--kr-bg-subtle);
  aspect-ratio: 16 / 9;
}

.kr-card-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.kr-card-hero:hover .kr-card-hero-media img {
  transform: scale(1.02);
}

.kr-card-hero-content {
  padding-top: 20px;
}

.kr-card-hero-title {
  font-family: var(--kr-font-serif);
  font-size: clamp(1.8rem, 3.2vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--kr-text-black);
  margin-top: 12px;
  margin-bottom: 12px;
}

.kr-card-hero:hover .kr-card-hero-title a {
  color: var(--kr-blue);
}

.kr-card-hero-excerpt {
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--kr-text-body);
  margin-bottom: 16px;
}

/* Secondary Stacked Stories */
.kr-hero-secondary {
  border-left: 1px solid var(--kr-border);
  padding-left: 36px;
  display: flex;
  flex-direction: column;
}

.kr-secondary-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.kr-card-compact {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--kr-border);
}

.kr-card-compact:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.kr-card-compact-media {
  aspect-ratio: 1 / 1;
  border-radius: var(--kr-radius-sm);
  overflow: hidden;
  background-color: var(--kr-bg-subtle);
}

.kr-card-compact-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.kr-card-compact-title {
  font-family: var(--kr-font-serif);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--kr-text-black);
  margin-top: 6px;
  margin-bottom: 8px;
}

.kr-card-compact:hover .kr-card-compact-title a {
  color: var(--kr-red);
}

/* ========================================================
   7. TRENDING / MOST READ (RANKED 01–05)
   ======================================================== */
.kr-trending-section {
  background-color: var(--kr-bg-light);
}

.kr-ranked-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.kr-card-ranked {
  display: flex;
  flex-direction: column;
  position: relative;
  padding-top: 12px;
}

.kr-rank-number {
  font-family: var(--kr-font-display);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: var(--kr-border-dark);
  margin-bottom: 8px;
  letter-spacing: -0.05em;
  transition: color var(--kr-transition-fast);
}

.kr-card-ranked:hover .kr-rank-number {
  color: var(--kr-red);
}

.kr-card-ranked-title {
  font-family: var(--kr-font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--kr-text-black);
  margin-top: 8px;
  margin-bottom: 8px;
}

.kr-card-ranked:hover .kr-card-ranked-title a {
  color: var(--kr-blue);
}

/* ========================================================
   8. STANDARD ARTICLE CARD (3-COLUMNS / 4-COLUMNS)
   ======================================================== */
.kr-card-standard {
  display: flex;
  flex-direction: column;
}

.kr-card-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--kr-radius-sm);
  background-color: var(--kr-bg-subtle);
  aspect-ratio: 16 / 10;
  margin-bottom: 14px;
}

.kr-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.kr-card-standard:hover .kr-card-media img {
  transform: scale(1.03);
}

.kr-card-title {
  font-family: var(--kr-font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--kr-text-black);
  margin-top: 8px;
  margin-bottom: 10px;
}

.kr-card-standard:hover .kr-card-title a {
  color: var(--kr-blue);
}

.kr-card-excerpt {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--kr-text-body);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Square media variation for K-Beauty/Lifestyle */
.kr-card-standard--square .kr-card-media {
  aspect-ratio: 1 / 1;
}

/* ========================================================
   9. AD PLACEMENT SLOTS (MONETIZATION READY)
   ======================================================== */
.kr-ad-slot-wrapper {
  margin: 32px auto;
  text-align: center;
  max-width: 100%;
}

.kr-ad-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--kr-text-light);
  margin-bottom: 6px;
  display: block;
}

.kr-ad-container {
  background-color: var(--kr-bg-subtle);
  border: 1px dashed var(--kr-border-dark);
  border-radius: var(--kr-radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  padding: 12px;
  width: 100%;
  max-width: 728px;
}

.kr-ad-placeholder-text {
  font-size: 0.8rem;
  color: var(--kr-text-muted);
}

/* ========================================================
   10. NEWSLETTER CARD / BAND
   ======================================================== */
.kr-newsletter-band {
  background-color: var(--kr-bg-light);
  border-top: 1px solid var(--kr-border);
  border-bottom: 1px solid var(--kr-border);
  padding: 60px 0;
}

.kr-newsletter-box {
  background-color: var(--kr-white);
  border: 1px solid var(--kr-border);
  border-radius: var(--kr-radius-md);
  padding: 40px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
  box-shadow: var(--kr-shadow-sm);
}

.kr-newsletter-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kr-blue);
  margin-bottom: 8px;
}

.kr-newsletter-heading {
  font-family: var(--kr-font-serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--kr-text-black);
  margin-bottom: 10px;
}

.kr-newsletter-description {
  font-size: 0.95rem;
  color: var(--kr-text-body);
}

.kr-newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.kr-newsletter-input-group {
  display: flex;
  gap: 8px;
}

.kr-newsletter-input {
  flex-grow: 1;
  padding: 12px 16px;
  border: 1px solid var(--kr-border-dark);
  border-radius: var(--kr-radius-sm);
  font-size: 0.95rem;
  background-color: var(--kr-white);
  outline: none;
  transition: border-color var(--kr-transition-fast);
}

.kr-newsletter-input:focus {
  border-color: var(--kr-blue);
}

.kr-newsletter-submit {
  padding: 12px 24px;
  background-color: var(--kr-blue);
  color: var(--kr-white);
  border: none;
  border-radius: var(--kr-radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--kr-transition-fast);
}

.kr-newsletter-submit:hover {
  background-color: var(--kr-blue-hover);
}

.kr-newsletter-disclaimer {
  font-size: 0.75rem;
  color: var(--kr-text-muted);
}

/* ========================================================
   11. FOOTER
   ======================================================== */
.kr-site-footer {
  background-color: var(--kr-text-black);
  color: #d1d5db;
  padding-top: 60px;
  padding-bottom: 30px;
}

.kr-footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid #374151;
}

.kr-footer-brand-title {
  font-family: var(--kr-font-display);
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--kr-white);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.kr-footer-brand-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #9ca3af;
  margin-bottom: 20px;
  max-width: 320px;
}

.kr-footer-heading {
  font-family: var(--kr-font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--kr-white);
  margin-bottom: 16px;
}

.kr-footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
}

.kr-footer-link {
  color: #9ca3af;
  transition: color var(--kr-transition-fast);
}

.kr-footer-link:hover {
  color: var(--kr-white);
}

.kr-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-size: 0.8rem;
  color: #9ca3af;
}

.kr-footer-legal-links {
  display: flex;
  gap: 20px;
}

/* ========================================================
   12. SEARCH OVERLAY & MOBILE DRAWER
   ======================================================== */
.kr-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.kr-modal.is-active {
  display: flex;
}

.kr-modal-content {
  background-color: var(--kr-white);
  border-radius: var(--kr-radius-md);
  width: 100%;
  max-width: 600px;
  padding: 32px;
  position: relative;
  box-shadow: var(--kr-shadow-lg);
}

.kr-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--kr-text-muted);
}

.kr-search-form-modal {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.kr-search-input-modal {
  flex-grow: 1;
  padding: 12px 16px;
  font-size: 1rem;
  border: 2px solid var(--kr-border);
  border-radius: var(--kr-radius-sm);
  outline: none;
}

.kr-search-input-modal:focus {
  border-color: var(--kr-blue);
}

.kr-search-btn-modal {
  background-color: var(--kr-blue);
  color: var(--kr-white);
  border: none;
  border-radius: var(--kr-radius-sm);
  padding: 12px 24px;
  font-weight: 700;
  cursor: pointer;
}

/* Mobile Drawer */
.kr-drawer {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 9998;
  display: none;
}

.kr-drawer.is-active {
  display: block;
}

.kr-drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 300px;
  background-color: var(--kr-white);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--kr-shadow-lg);
}

.kr-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--kr-border);
}

.kr-drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 1.1rem;
  font-weight: 600;
}

/* ========================================================
   13. RESPONSIVE BREAKPOINTS
   ======================================================== */
@media (max-width: 1024px) {
  .kr-hero-layout {
    grid-template-columns: 1fr;
  }
  .kr-hero-secondary {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--kr-border);
    padding-top: 28px;
  }
  .kr-ranked-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .kr-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .kr-footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .kr-nav-menu, .kr-btn-newsletter-nav {
    display: none;
  }
  .kr-mobile-toggle {
    display: inline-flex;
  }
}

@media (max-width: 768px) {
  .kr-grid--3, .kr-grid--2 {
    grid-template-columns: 1fr;
  }
  .kr-ranked-grid {
    grid-template-columns: 1fr;
  }
  .kr-newsletter-box {
    grid-template-columns: 1fr;
    padding: 24px;
  }
  .kr-footer-top {
    grid-template-columns: 1fr;
  }
  .kr-footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .kr-card-compact {
    grid-template-columns: 80px 1fr;
  }
}