/**
 * News Samsung-Inspired Styles for Ayla Star
 * ===========================================
 * 
 * CUSTOMIZATION GUIDE:
 * --------------------
 * - --site-bg: Main page background color (default: #162448 - deep blue)
 * - --accent: Accent color for highlights (default: #5aa0e6)
 * - --accent-hover: Hover state for accents (default: #3373b5)
 * - --text-main: Primary text color (default: #eaf4ff)
 * - --text-subtle: Secondary text color (default: #b0c4de)
 * - --card-bg: Article card background (default: #1c2f52)
 * - --card-border: Card border color (default: #2a3f66)
 * 
 * RECOMMENDED IMAGE SIZES:
 * ------------------------
 * - Featured articles: 1200x675 pixels (16:9 aspect ratio)
 * - Standard articles: 800x450 pixels (16:9 aspect ratio)
 * - Minimum width: 1200px for best quality on large screens
 */

/* ========================================
   CSS VARIABLES
   ======================================== */
:root {
  --site-bg: #162448;
  --accent: #5aa0e6;
  --accent-hover: #3373b5;
  --text-main: #eaf4ff;
  --text-subtle: #b0c4de;
  --card-bg: #1c2f52;
  --card-border: #2a3f66;
  --header-bg: #10182a;
  --footer-bg: #0b1627;
  --input-bg: #1c2f52;
  --input-border: #3a5080;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --border-radius-sm: 6px;
  --border-radius-md: 10px;
  --border-radius-lg: 16px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
  --max-width: 1280px;
}

/* ========================================
   BASE STYLES
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background: var(--site-bg);
  color: var(--text-main);
  font-family: 'Montserrat', Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Screen reader only utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus outlines for accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ========================================
   HEADER
   ======================================== */
.news-header {
  background: var(--header-bg);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.news-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.news-header__logo-link {
  display: flex;
  align-items: center;
}

.news-header__logo {
  height: 50px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
}

.news-header__nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.news-header__nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.news-header__nav-link:hover,
.news-header__nav-link:focus {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.news-header__contact-btn {
  background: var(--accent);
  color: #10182a !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: var(--border-radius-sm);
  border-bottom: none !important;
  font-weight: 700;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.news-header__contact-btn:hover,
.news-header__contact-btn:focus {
  background: var(--accent-hover);
  color: #fff !important;
  transform: translateY(-1px);
}

.news-header__toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--accent);
  cursor: pointer;
  padding: 0.5rem;
}

/* ========================================
   HERO SECTION
   ======================================== */
.news-hero {
  background: linear-gradient(135deg, var(--site-bg) 0%, #1a3060 100%);
  padding: 4rem 1.5rem 3rem;
  text-align: center;
}

.news-hero__inner {
  max-width: 720px;
  margin: 0 auto;
}

.news-hero__title {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 1rem;
  color: var(--text-main);
}

.news-hero__subtitle {
  font-size: 1.1rem;
  color: var(--text-subtle);
  margin: 0 0 2rem;
  line-height: 1.7;
}

.news-hero__search {
  display: flex;
  max-width: 480px;
  margin: 0 auto;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.news-hero__search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 160, 230, 0.2);
}

.news-hero__search-input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  color: var(--text-main);
  font-family: inherit;
}

.news-hero__search-input::placeholder {
  color: var(--text-subtle);
}

.news-hero__search-input:focus {
  outline: none;
}

.news-hero__search-btn {
  background: var(--accent);
  border: none;
  padding: 1rem 1.5rem;
  color: #10182a;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.news-hero__search-btn:hover,
.news-hero__search-btn:focus {
  background: var(--accent-hover);
  color: #fff;
}

/* ========================================
   FILTER BAR
   ======================================== */
.news-filters {
  background: var(--site-bg);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 64px;
  z-index: 900;
}

.news-filters__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.news-filters__btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-subtle);
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.news-filters__btn:hover,
.news-filters__btn:focus {
  border-color: var(--accent);
  color: var(--accent);
}

.news-filters__btn--active {
  background: var(--accent);
  border-color: var(--accent);
  color: #10182a;
}

.news-filters__btn--active:hover,
.news-filters__btn--active:focus {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

/* ========================================
   FEATURED ARTICLES
   ======================================== */
.news-featured {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

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

/* ========================================
   ARTICLE CARDS
   ======================================== */

/* Anchor-based card styling for block-level links */
a.news-card,
a.news-card--link {
  display: flex;
  text-decoration: none;
  color: inherit;
}

.news-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  cursor: pointer;
  flex-direction: column;
}

.news-card:hover,
.news-card:focus {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.news-card:focus {
  outline: none;
  border-color: var(--accent);
}

/* Focus-visible outlines for keyboard accessibility */
.news-card:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-color: var(--accent);
}

.news-card__image-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.news-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.news-card:hover .news-card__image,
.news-card:focus .news-card__image {
  transform: scale(1.05);
}

.news-card__content {
  padding: 1.5rem;
}

.news-card__category {
  display: inline-block;
  background: var(--accent);
  color: #10182a;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
}

.news-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  color: var(--text-main);
  line-height: 1.4;
}

.news-card__excerpt {
  color: var(--text-subtle);
  font-size: 0.95rem;
  margin: 0 0 1rem;
  line-height: 1.6;
}

.news-card__meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-subtle);
}

.news-card__date {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.news-card__read-time {
  opacity: 0.8;
}

/* Featured card variations */
.news-card--featured .news-card__title {
  font-size: 1.4rem;
}

.news-card--featured .news-card__content {
  padding: 1.75rem;
}

/* ========================================
   MAIN ARTICLES LIST
   ======================================== */
.news-articles {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.news-articles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.news-articles__load-more {
  text-align: center;
  margin-top: 3rem;
}

.news-load-more-btn {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 0.875rem 2.5rem;
  border-radius: var(--border-radius-md);
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.news-load-more-btn:hover,
.news-load-more-btn:focus {
  background: var(--accent);
  color: #10182a;
  transform: translateY(-2px);
}

.news-load-more-btn i {
  transition: transform var(--transition-fast);
}

.news-load-more-btn:hover i {
  transform: translateY(3px);
}

/* Hidden state for filtered cards */
.news-card.hidden {
  display: none;
}

/* ========================================
   FOOTER
   ======================================== */
.news-footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--card-border);
  padding: 3rem 1.5rem;
  text-align: center;
}

.news-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.news-footer__logo {
  height: 60px;
  width: auto;
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
}

.news-footer__socials {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.news-footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--card-bg);
  color: var(--text-subtle);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.news-footer__social-link:hover,
.news-footer__social-link:focus {
  background: var(--accent);
  color: #10182a;
  transform: translateY(-2px);
}

.news-footer__links {
  margin-bottom: 1.5rem;
}

.news-footer__links a {
  color: var(--text-subtle);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.news-footer__links a:hover,
.news-footer__links a:focus {
  color: var(--accent);
}

.news-footer__sep {
  color: var(--card-border);
  margin: 0 0.75rem;
}

.news-footer__copy {
  color: var(--text-subtle);
  font-size: 0.85rem;
  margin: 0;
  opacity: 0.8;
}

/* ========================================
   RESPONSIVE STYLES (Mobile-First Approach)
   ======================================== */

/* Tablets and below */
@media (max-width: 991.98px) {
  .news-featured__grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  .news-hero__title {
    font-size: 2rem;
  }
}

/* Mobile devices */
@media (max-width: 767.98px) {
  .news-header__nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

  .news-header__nav.open {
    display: flex;
  }

  .news-header__nav-link {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--card-border);
    width: 100%;
  }

  .news-header__nav-link:last-child {
    border-bottom: none;
  }

  .news-header__contact-btn {
    margin-top: 0.5rem;
    text-align: center;
  }

  .news-header__toggle {
    display: block;
  }

  .news-hero {
    padding: 2.5rem 1rem 2rem;
  }

  .news-hero__title {
    font-size: 1.75rem;
  }

  .news-hero__subtitle {
    font-size: 1rem;
  }

  .news-articles__grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .news-filters {
    top: 64px;
  }

  .news-filters__inner {
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .news-filters__btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }

  .news-card__content {
    padding: 1.25rem;
  }

  .news-card__title {
    font-size: 1.1rem;
  }

  .news-card--featured .news-card__title {
    font-size: 1.2rem;
  }

  .news-card--featured .news-card__content {
    padding: 1.25rem;
  }
}

/* ========================================
   REDUCED MOTION PREFERENCES
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .news-card:hover,
  .news-card:focus {
    transform: none;
  }

  .news-card:hover .news-card__image,
  .news-card:focus .news-card__image {
    transform: none;
  }

  .news-load-more-btn:hover,
  .news-load-more-btn:focus {
    transform: none;
  }

  .news-load-more-btn:hover i {
    transform: none;
  }

  .news-header__contact-btn:hover,
  .news-header__contact-btn:focus {
    transform: none;
  }

  .news-footer__social-link:hover,
  .news-footer__social-link:focus {
    transform: none;
  }
}