/* ==============================
   ROOT & THEME
============================== */
:root {
  --primary: #6d5dfc;
  --primary-dark: #5545e8;
  --secondary: #13c8a3;
  --accent: #ffb547;

  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #f0f2f8;
  --text: #151626;
  --text-soft: #64677a;
  --border: rgba(21, 22, 38, 0.09);

  --header-bg: rgba(255, 255, 255, 0.82);
  --overlay: rgba(10, 12, 25, 0.72);

  --shadow-sm: 0 8px 24px rgba(37, 39, 70, 0.07);
  --shadow-md: 0 18px 50px rgba(37, 39, 70, 0.12);
  --shadow-lg: 0 28px 80px rgba(37, 39, 70, 0.18);

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;

  --container: 1200px;
  --transition: 0.25s ease;
}

body.dark {
  --bg: #0d0f18;
  --surface: #151824;
  --surface-soft: #1c2030;
  --text: #f5f6ff;
  --text-soft: #a8adc0;
  --border: rgba(255, 255, 255, 0.09);

  --header-bg: rgba(13, 15, 24, 0.84);
  --overlay: rgba(2, 4, 12, 0.82);

  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 18px 50px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, 0.35);
}

/* ==============================
   RESET
============================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: "Plus Jakarta Sans", sans-serif;
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
}

body.no-scroll {
  overflow: hidden;
}

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

button {
  border: 0;
  cursor: pointer;
}

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

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

ul {
  list-style: none;
}

.container {
  width: min(calc(100% - 32px), var(--container));
  margin-inline: auto;
}

.gradient-text {
  color: transparent;
  background: linear-gradient(135deg, var(--primary), #9d4edd, var(--secondary));
  background-clip: text;
  -webkit-background-clip: text;
}

.section {
  padding: 86px 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin-bottom: 8px;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.2;
}

.section-heading p {
  max-width: 650px;
  color: var(--text-soft);
}

.icon-btn {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  transition: var(--transition);
}

.icon-btn:hover {
  color: #fff;
  border-color: var(--primary);
  background: var(--primary);
  transform: translateY(-2px);
}

/* ==============================
   HEADER
============================== */
.header {
  position: sticky;
  z-index: 1000;
  top: 0;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.navbar {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 1.3rem;
  font-weight: 800;
}

.logo-mark {
  display: grid;
  width: 42px;
  height: 42px;
  color: #fff;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #9b5cff);
  box-shadow: 0 9px 25px rgba(109, 93, 252, 0.33);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-menu a {
  position: relative;
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition);
}

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

.nav-menu a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  content: "";
  border-radius: 99px;
  background: var(--primary);
  transform: scaleX(0);
  transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-toggle {
  display: none;
}

/* ==============================
   HERO
============================== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 78px 0 68px;
}

.hero::before,
.hero::after {
  position: absolute;
  z-index: -1;
  width: 420px;
  height: 420px;
  content: "";
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.18;
}

.hero::before {
  top: -190px;
  left: -120px;
  background: var(--primary);
}

.hero::after {
  right: -150px;
  bottom: -200px;
  background: var(--secondary);
}

.hero-content {
  display: grid;
  align-items: center;
  gap: 50px;
  grid-template-columns: 1.05fr 0.95fr;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 20px;
  padding: 8px 13px;
  color: var(--primary);
  border: 1px solid rgba(109, 93, 252, 0.2);
  border-radius: 999px;
  background: rgba(109, 93, 252, 0.08);
  font-size: 0.82rem;
  font-weight: 700;
}

.hero-badge span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--secondary);
  box-shadow: 0 0 0 5px rgba(19, 200, 163, 0.13);
}

.hero h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(2.7rem, 6vw, 5.3rem);
  letter-spacing: -0.055em;
  line-height: 1.03;
}

.hero-description {
  max-width: 660px;
  margin-bottom: 30px;
  color: var(--text-soft);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
}

.btn {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border-radius: 15px;
  font-weight: 700;
  transition: var(--transition);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #8a59ff);
  box-shadow: 0 13px 30px rgba(109, 93, 252, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 17px 40px rgba(109, 93, 252, 0.4);
  transform: translateY(-3px);
}

.btn-secondary {
  border: 1px solid var(--border);
  background: var(--surface);
}

.btn-secondary:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 38px;
}

.hero-stat strong {
  display: block;
  font-size: 1.35rem;
}

.hero-stat span {
  color: var(--text-soft);
  font-size: 0.82rem;
}

.featured-card {
  position: relative;
  min-height: 500px;
  overflow: hidden;
  color: #fff;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(to top, rgba(7, 8, 18, 0.94), rgba(7, 8, 18, 0.1)),
    url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1200&q=85")
    center/cover;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.featured-card:hover {
  transform: translateY(-6px) rotate(0.4deg);
}

.featured-label {
  position: absolute;
  top: 22px;
  left: 22px;
  padding: 8px 13px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px);
  font-size: 0.75rem;
  font-weight: 700;
}

.featured-content {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 32px;
}

.featured-content h2 {
  margin: 12px 0;
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  line-height: 1.25;
}

.featured-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.8rem;
}

/* ==============================
   SEARCH & CATEGORY
============================== */
.discover-panel {
  padding: 25px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.search-box {
  position: relative;
  margin-bottom: 20px;
}

.search-box input {
  width: 100%;
  height: 56px;
  padding: 0 52px 0 18px;
  outline: none;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-soft);
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(109, 93, 252, 0.1);
}

.search-icon {
  position: absolute;
  top: 50%;
  right: 18px;
  color: var(--text-soft);
  transform: translateY(-50%);
}

.category-list {
  display: flex;
  overflow-x: auto;
  gap: 10px;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.category-list::-webkit-scrollbar {
  display: none;
}

.category-btn {
  flex: 0 0 auto;
  padding: 10px 15px;
  color: var(--text-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  font-size: 0.82rem;
  font-weight: 700;
  transition: var(--transition);
}

.category-btn:hover,
.category-btn.active {
  color: #fff;
  border-color: var(--primary);
  background: var(--primary);
}

/* ==============================
   ARTICLE CARDS
============================== */
.articles-grid {
  display: grid;
  gap: 25px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.article-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-7px);
}

.article-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.article-image img {
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .article-image img {
  transform: scale(1.07);
}

.article-category {
  position: absolute;
  bottom: 14px;
  left: 14px;
  padding: 7px 11px;
  color: #fff;
  border-radius: 999px;
  background: rgba(16, 17, 30, 0.7);
  backdrop-filter: blur(10px);
  font-size: 0.72rem;
  font-weight: 700;
}

.article-body {
  padding: 22px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--text-soft);
  font-size: 0.76rem;
}

.article-body h3 {
  display: -webkit-box;
  overflow: hidden;
  margin-bottom: 10px;
  font-size: 1.15rem;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.article-body p {
  display: -webkit-box;
  overflow: hidden;
  margin-bottom: 19px;
  color: var(--text-soft);
  font-size: 0.88rem;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.author {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.8rem;
  font-weight: 700;
}

.author-avatar {
  display: grid;
  width: 33px;
  height: 33px;
  color: #fff;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  font-size: 0.72rem;
}

.read-btn {
  color: var(--primary);
  background: transparent;
  font-size: 0.8rem;
  font-weight: 800;
}

.read-btn:hover {
  text-decoration: underline;
}

.empty-state {
  display: none;
  padding: 55px 20px;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.empty-state.show {
  display: block;
}

.empty-state .emoji {
  margin-bottom: 12px;
  font-size: 3rem;
}

.load-more-wrapper {
  margin-top: 36px;
  text-align: center;
}

/* ==============================
   TOPICS
============================== */
.topics-section {
  background: var(--surface);
}

.topics-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(4, 1fr);
}

.topic-card {
  padding: 25px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  transition: var(--transition);
}

.topic-card:hover {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary), #8257ec);
  box-shadow: 0 15px 35px rgba(109, 93, 252, 0.25);
  transform: translateY(-6px);
}

.topic-icon {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  place-items: center;
  border-radius: 15px;
  background: var(--surface);
  font-size: 1.35rem;
}

.topic-card h3 {
  margin-bottom: 7px;
  font-size: 1rem;
}

.topic-card p {
  color: var(--text-soft);
  font-size: 0.8rem;
}

.topic-card:hover p {
  color: rgba(255, 255, 255, 0.75);
}

/* ==============================
   NEWSLETTER
============================== */
.newsletter {
  position: relative;
  overflow: hidden;
  color: #fff;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #5c4cef, #8b55ec 56%, #13bfa0);
  box-shadow: var(--shadow-lg);
}

.newsletter::before {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 330px;
  height: 330px;
  content: "";
  border: 60px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.newsletter-content {
  position: relative;
  display: grid;
  align-items: center;
  gap: 40px;
  padding: 55px;
  grid-template-columns: 1fr 0.8fr;
}

.newsletter h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
}

.newsletter p {
  color: rgba(255, 255, 255, 0.76);
}

.newsletter-form {
  display: flex;
  gap: 10px;
  padding: 7px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(10px);
}

.newsletter-form input {
  min-width: 0;
  flex: 1;
  padding: 0 14px;
  outline: none;
  color: #fff;
  border: 0;
  background: transparent;
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.65);
}

.newsletter-form button {
  min-height: 46px;
  padding: 0 18px;
  color: var(--primary);
  border-radius: 12px;
  background: #fff;
  font-weight: 800;
}

/* ==============================
   FOOTER
============================== */
.footer {
  margin-top: 90px;
  padding: 65px 0 25px;
  color: rgba(255, 255, 255, 0.7);
  background: #11131e;
}

.footer-grid {
  display: grid;
  gap: 45px;
  padding-bottom: 45px;
  grid-template-columns: 1.5fr repeat(3, 1fr);
}

.footer .logo {
  display: inline-flex;
  margin-bottom: 17px;
  color: #fff;
}

.footer-description {
  max-width: 350px;
  font-size: 0.88rem;
}

.footer h4 {
  margin-bottom: 16px;
  color: #fff;
}

.footer-links {
  display: grid;
  gap: 10px;
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
}

/* ==============================
   MODAL & TOAST
============================== */
.modal {
  position: fixed;
  z-index: 2000;
  inset: 0;
  display: grid;
  padding: 20px;
  visibility: hidden;
  place-items: center;
  background: var(--overlay);
  opacity: 0;
  transition: var(--transition);
}

.modal.show {
  visibility: visible;
  opacity: 1;
}

.modal-dialog {
  width: min(100%, 780px);
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  transform: translateY(25px) scale(0.98);
  transition: var(--transition);
}

.modal.show .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-image {
  width: 100%;
  height: 310px;
  object-fit: cover;
}

.modal-content {
  padding: 32px;
}

.modal-content h2 {
  margin: 12px 0 16px;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.25;
}

.modal-content p {
  margin-bottom: 16px;
  color: var(--text-soft);
}

.modal-close {
  position: fixed;
  z-index: 10;
  top: 30px;
  right: 30px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(10px);
}

.toast {
  position: fixed;
  z-index: 3000;
  right: 20px;
  bottom: 20px;
  max-width: calc(100% - 40px);
  padding: 15px 19px;
  color: #fff;
  border-radius: 13px;
  background: #191b29;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(30px);
  pointer-events: none;
  transition: var(--transition);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==============================
   RESPONSIVE TABLET
============================== */
@media (max-width: 980px) {
  .nav-menu {
    position: fixed;
    top: 77px;
    right: 16px;
    left: 16px;
    display: grid;
    visibility: hidden;
    gap: 0;
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(-12px);
    transition: var(--transition);
  }

  .nav-menu.show {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-menu a {
    padding: 13px;
    border-radius: 10px;
  }

  .nav-menu a:hover {
    background: var(--surface-soft);
  }

  .nav-menu a::after {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  .hero-content {
    grid-template-columns: 1fr;
  }

  .featured-card {
    min-height: 440px;
  }

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

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

  .newsletter-content {
    grid-template-columns: 1fr;
  }

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

/* ==============================
   RESPONSIVE MOBILE
============================== */
@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 22px), var(--container));
  }

  .section {
    padding: 65px 0;
  }

  .navbar {
    min-height: 68px;
  }

  .nav-menu {
    top: 69px;
  }

  .logo-mark {
    width: 38px;
    height: 38px;
  }

  .hero {
    padding-top: 52px;
  }

  .hero h1 {
    font-size: clamp(2.5rem, 14vw, 4rem);
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-stat strong {
    font-size: 1.05rem;
  }

  .hero-stat span {
    font-size: 0.7rem;
  }

  .featured-card {
    min-height: 420px;
  }

  .featured-content {
    padding: 23px;
  }

  .discover-panel {
    padding: 15px;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
  }

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

  .article-image {
    height: 235px;
  }

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

  .newsletter-content {
    padding: 35px 22px;
  }

  .newsletter-form {
    align-items: stretch;
    flex-direction: column;
  }

  .newsletter-form input {
    min-height: 45px;
  }

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

  .footer-bottom {
    align-items: start;
    flex-direction: column;
  }

  .modal {
    padding: 10px;
  }

  .modal-image {
    height: 220px;
  }

  .modal-content {
    padding: 22px;
  }

  .modal-close {
    top: 17px;
    right: 17px;
  }
}