/* ================================================================
   Video-Konferans.com.tr — Design System
   Nolto Teknoloji AŞ
   ================================================================ */

/* ── CSS Custom Properties ───────────────────────────────────── */
:root {
  /* Primary palette */
  --primary: #0a2540;
  --primary-light: #1a3a5c;
  --primary-dark: #061a2e;

  /* Accent */
  --accent: #f97316;
  --accent-light: #fb923c;
  --accent-dark: #ea580c;

  /* Neutral */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Secondary */
  --secondary: #14b8a6;
  --secondary-light: #2dd4bf;
  --secondary-dark: #0d9488;

  /* Semantic */
  --success: #22c55e;
  --info: #3b82f6;
  --warning: #f59e0b;

  /* Surfaces */
  --bg: #ffffff;
  --bg-alt: var(--gray-50);
  --card-bg: #ffffff;
  --card-border: var(--gray-200);

  /* Text */
  --text: var(--gray-800);
  --text-muted: #475569;
  --text-on-primary: #ffffff;

  /* Spacing scale */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Border radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(10, 37, 64, .06), 0 1px 2px rgba(10, 37, 64, .04);
  --shadow: 0 4px 12px rgba(10, 37, 64, .08), 0 2px 4px rgba(10, 37, 64, .04);
  --shadow-lg: 0 12px 32px rgba(10, 37, 64, .12), 0 4px 8px rgba(10, 37, 64, .06);
  --shadow-xl: 0 20px 48px rgba(10, 37, 64, .16);

  /* Transitions */
  --transition: 0.25s cubic-bezier(.4, 0, .2, 1);
  --transition-fast: 0.15s cubic-bezier(.4, 0, .2, 1);

  /* Container */
  --container: 1200px;
  --container-sm: 800px;

  /* Font */
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── 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);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--accent-dark);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ── Typography ──────────────────────────────────────────────── */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--primary);
  font-weight: 700;
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
}

h2 {
  font-size: clamp(1.375rem, 3vw, 2rem);
}

h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p+p {
  margin-top: var(--sp-4);
}

/* ── Layout ──────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.container--sm {
  max-width: 900px;
}

.section {
  padding: var(--sp-16) 0;
}

.section--alt {
  background: var(--bg-alt);
  position: relative;
}

/* ── Wave Section Dividers ─────────────────────────────────── */
.wave-divider {
  position: relative;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  margin-top: -1px;
}

.wave-divider svg {
  display: block;
  width: 100%;
  height: 50px;
}

.wave-divider--flip {
  transform: rotate(180deg);
  margin-bottom: -1px;
  margin-top: 0;
}

/* ── Gradient Background Animation ──────────────────────────── */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.bg-animated-gradient {
  background: linear-gradient(-45deg, #0a2540, #1a3a5c, #0e4166, #0a2540);
  background-size: 400% 400%;
  animation: gradientShift 12s ease infinite;
}

/* ── Floating Particles (Hero Decoration) ───────────────────── */
@keyframes float {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.5;
  }

  50% {
    transform: translateY(-25px) rotate(180deg);
    opacity: 0.8;
  }
}

@keyframes floatReverse {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.4;
  }

  50% {
    transform: translateY(20px) rotate(-120deg);
    opacity: 0.7;
  }
}

.floating-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.floating-shapes span {
  position: absolute;
  display: block;
  border-radius: 50%;
  opacity: 0.15;
}

.floating-shapes span:nth-child(1) {
  width: 80px;
  height: 80px;
  background: var(--accent);
  top: 15%;
  left: 8%;
  animation: float 7s ease-in-out infinite;
}

.floating-shapes span:nth-child(2) {
  width: 50px;
  height: 50px;
  background: var(--info);
  top: 60%;
  right: 12%;
  animation: floatReverse 9s ease-in-out infinite;
}

.floating-shapes span:nth-child(3) {
  width: 120px;
  height: 120px;
  background: var(--accent-light);
  bottom: 10%;
  left: 65%;
  animation: float 11s ease-in-out infinite 2s;
  opacity: 0.08;
}

.floating-shapes span:nth-child(4) {
  width: 40px;
  height: 40px;
  background: #fff;
  top: 25%;
  right: 25%;
  animation: floatReverse 6s ease-in-out infinite 1s;
  border-radius: 30%;
}

.floating-shapes span:nth-child(5) {
  width: 60px;
  height: 60px;
  background: var(--success);
  bottom: 30%;
  left: 20%;
  animation: float 8s ease-in-out infinite 3s;
  opacity: 0.1;
}

/* ── Glow Effect ────────────────────────────────────────────── */
@keyframes pulseGlow {

  0%,
  100% {
    box-shadow: 0 0 20px rgba(249, 115, 22, 0.15);
  }

  50% {
    box-shadow: 0 0 40px rgba(249, 115, 22, 0.3);
  }
}

.glow-accent {
  animation: pulseGlow 3s ease-in-out infinite;
}

.section--dark {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--text-on-primary);
}

.section--dark h2,
.section--dark h3 {
  color: var(--text-on-primary);
}

.grid {
  display: grid;
  gap: var(--sp-8);
}

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

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

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

@media (max-width: 992px) {
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid--2 {
    grid-template-columns: 1fr;
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .grid--4 {
    grid-template-columns: 1fr;
  }
}

/* ── Header / Navbar ─────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.navbar__logo span {
  color: var(--accent);
}

.navbar__logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.navbar__link {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--gray-700);
  transition: all var(--transition-fast);
  position: relative;
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--accent);
  background: rgba(249, 115, 22, .06);
}

.navbar__cta {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  margin-left: var(--sp-3);
  box-shadow: 0 2px 8px rgba(249, 115, 22, .25);
  transition: all var(--transition);
}

.navbar__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(249, 115, 22, .35);
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
  color: #fff;
}

/* Hamburger */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
}

.navbar__toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.navbar__toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle.open span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .navbar__toggle {
    display: flex;
  }

  .navbar__menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--sp-4);
    gap: var(--sp-1);
    box-shadow: var(--shadow-lg);
  }

  .navbar__menu.open {
    display: flex;
  }

  .navbar__link {
    width: 100%;
    padding: var(--sp-3) var(--sp-4);
  }

  .navbar__cta {
    margin-left: 0;
    text-align: center;
    margin-top: var(--sp-2);
  }
}

/* ── Hero Section ────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #0d3158 50%, var(--primary-dark) 100%);
  position: relative;
  overflow: hidden;
  padding: var(--sp-20) 0;
  min-height: 540px;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(249, 115, 22, .12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, .08) 0%, transparent 50%);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: rgba(249, 115, 22, .15);
  color: var(--accent-light);
  padding: var(--sp-1) var(--sp-4);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--sp-6);
  border: 1px solid rgba(249, 115, 22, .25);
}

.hero__title {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--sp-6);
}

.hero__title span {
  color: var(--accent);
}

.hero__desc {
  color: rgba(255, 255, 255, .8);
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: var(--sp-8);
  max-width: 540px;
}

.hero__actions {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__visual-inner {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 4/3;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.hero__visual-inner::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 180deg, transparent, rgba(249, 115, 22, .12), transparent, rgba(59, 130, 246, .08), transparent);
  animation: rotate 16s linear infinite;
}

@keyframes rotate {
  100% {
    transform: rotate(360deg);
  }
}

/* Product Image Showcase */
.hero__product-showcase {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-6);
}

.hero__product-img {
  position: absolute;
  object-fit: contain;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, .3));
  transition: transform 0.6s ease;
}

.hero__product-img--main {
  width: 85%;
  max-height: 80%;
  z-index: 2;
  animation: heroFloat 5s ease-in-out infinite;
}

.hero__product-img--secondary {
  width: 45%;
  max-height: 45%;
  right: -5%;
  bottom: 8%;
  z-index: 3;
  animation: heroFloat 5s ease-in-out infinite 1.5s;
  filter: drop-shadow(0 6px 20px rgba(0, 0, 0, .4));
}

@keyframes heroFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-12px);
  }
}

.hero__visual-inner:hover .hero__product-img--main {
  transform: scale(1.04);
}

@media (max-width: 768px) {
  .hero {
    padding: var(--sp-12) 0;
    min-height: auto;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__desc {
    margin: 0 auto var(--sp-8);
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__visual-inner {
    max-width: 320px;
    margin: var(--sp-8) auto 0;
  }
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(249, 115, 22, .3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(249, 115, 22, .4);
  color: #fff;
}

.btn--outline {
  border: 2px solid rgba(255, 255, 255, .3);
  color: #fff;
  background: rgba(255, 255, 255, .05);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .5);
  color: #fff;
}

.btn--outline-dark {
  border: 2px solid var(--gray-300);
  color: var(--gray-700);
}

.btn--outline-dark:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--sm {
  padding: var(--sp-2) var(--sp-4);
  font-size: 0.8125rem;
}

.btn--lg {
  padding: var(--sp-4) var(--sp-8);
  font-size: 1rem;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.card__image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

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

.card:hover .card__image img {
  transform: scale(1.04);
}

.card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
  color: var(--gray-400);
  font-size: 3rem;
}

.card__body {
  padding: var(--sp-6);
}

.card__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-3);
  background: rgba(249, 115, 22, .08);
  color: var(--accent-dark);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--sp-3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card__title {
  font-size: 1.125rem;
  margin-bottom: var(--sp-3);
  line-height: 1.3;
}

.card__title a {
  color: var(--primary);
  text-decoration: none;
}

.card__title a:hover {
  color: var(--accent);
}

.card__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: var(--sp-4);
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.card__meta-item {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.card__footer {
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--accent);
}

.card__link:hover {
  gap: var(--sp-3);
}

/* ── Featured Products ───────────────────────────────────────── */
.product-card .card__image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
  padding: var(--sp-6);
}

.product-card .card__image img {
  object-fit: contain;
}

.product-card__brand {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--sp-1);
}

.product-card__price {
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-style: italic;
}


/* ── Page Header ─────────────────────────────────────────────── */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: var(--sp-16) 0 var(--sp-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 100%, rgba(249, 115, 22, .08) 0%, transparent 60%);
}

.page-header h1 {
  color: #fff;
  position: relative;
  z-index: 1;
  margin-bottom: var(--sp-4);
}

.page-header p {
  color: rgba(255, 255, 255, .75);
  font-size: 1.125rem;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ── Product Detail ──────────────────────────────────────────── */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: start;
}

.product-detail__image {
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4/3;
  position: sticky;
  top: 100px;
}

.product-detail__image img {
  max-height: 360px;
  object-fit: contain;
}

.product-detail__brand {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--sp-2);
}

.product-detail__name {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--sp-4);
}

.product-detail__short-desc {
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: var(--sp-6);
}

.product-detail__features {
  margin-bottom: var(--sp-8);
}

.product-detail__features h3 {
  margin-bottom: var(--sp-4);
}

.product-detail__features ul {
  display: grid;
  gap: var(--sp-3);
}

.product-detail__features li {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: 0.9375rem;
  color: var(--text);
}

.product-detail__features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
  margin-top: 2px;
  flex-shrink: 0;
}

/* Spec table */
.spec-table {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  margin: var(--sp-6) 0;
}

.spec-table th,
.spec-table td {
  padding: var(--sp-3) var(--sp-4);
  text-align: left;
  font-size: 0.9rem;
}

.spec-table th {
  background: var(--gray-100);
  color: var(--primary);
  font-weight: 600;
  width: 40%;
  border-right: 1px solid var(--gray-200);
}

.spec-table tr:not(:last-child) {
  border-bottom: 1px solid var(--gray-100);
}

.spec-table tr:hover {
  background: var(--gray-50);
}

@media (max-width: 768px) {
  .product-detail {
    grid-template-columns: 1fr;
  }

  .product-detail__image {
    position: static;
  }
}

/* ── Guide / Article content ────────────────────────────────── */
.article-content {
  max-width: 780px;
  margin: 0 auto;
}

.article-content h2 {
  margin: var(--sp-10) 0 var(--sp-4);
  padding-bottom: var(--sp-2);
  border-bottom: 2px solid var(--gray-200);
}

.article-content h3 {
  margin: var(--sp-8) 0 var(--sp-3);
}

.article-content p {
  margin-bottom: var(--sp-4);
  line-height: 1.8;
}

.article-content ul,
.article-content ol {
  list-style: disc;
  padding-left: var(--sp-6);
  margin-bottom: var(--sp-4);
}

.article-content li {
  margin-bottom: var(--sp-2);
  line-height: 1.7;
}

.article-content ol {
  list-style: decimal;
}

.article-content strong {
  color: var(--primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--sp-8);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--gray-200);
}

.article-meta__item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

/* ── Category Filter Tabs ────────────────────────────────────── */
.filter-tabs {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin-bottom: var(--sp-8);
  justify-content: center;
}

.filter-tab {
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-600);
  background: var(--gray-100);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── Stats Row ───────────────────────────────────────────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--sp-8);
  text-align: center;
}

.stat__number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: var(--sp-2);
}

.stat__label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, .7);
  font-weight: 500;
}

/* ── Section Title ───────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--sp-12);
}

.section-header__overline {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--sp-3);
}

.section-header h2 {
  margin-bottom: var(--sp-4);
}

.section-header p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.0625rem;
}

/* ── Feature Blocks ──────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-8);
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-block {
  text-align: center;
  padding: var(--sp-8);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  transition: all var(--transition);
}

.feature-block:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.feature-block__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--sp-5);
  background: linear-gradient(135deg, rgba(249, 115, 22, .1) 0%, rgba(249, 115, 22, .05) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.feature-block h3 {
  margin-bottom: var(--sp-3);
  font-size: 1.125rem;
}

.feature-block p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Contact / Form ──────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: start;
}

.contact-info__item {
  display: flex;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(249, 115, 22, .1) 0%, rgba(249, 115, 22, .05) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-info__text h4 {
  margin-bottom: var(--sp-1);
  font-size: 1rem;
}

.contact-info__text p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: var(--sp-5);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--gray-700);
  margin-bottom: var(--sp-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  background: var(--bg);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, .1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, .7);
  padding: var(--sp-16) 0 0;
}

.footer a {
  color: rgba(255, 255, 255, .7);
}

.footer a:hover {
  color: var(--accent);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-10);
  padding-bottom: var(--sp-12);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.footer__brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--sp-4);
}

.footer__brand span {
  color: var(--accent);
}

.footer__desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: var(--sp-4);
}

.footer__heading {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--sp-5);
}

.footer__links {
  display: grid;
  gap: var(--sp-3);
}

.footer__links a {
  font-size: 0.9rem;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-6) 0;
  font-size: 0.8125rem;
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--sp-2);
    text-align: center;
  }
}

/* ── 404 ─────────────────────────────────────────────────────── */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.error-page__code {
  font-size: clamp(5rem, 15vw, 10rem);
  font-weight: 900;
  color: var(--gray-200);
  line-height: 1;
  margin-bottom: var(--sp-4);
}

.error-page h2 {
  margin-bottom: var(--sp-4);
}

.error-page p {
  color: var(--text-muted);
  margin-bottom: var(--sp-8);
}

/* ── CTA Banner ──────────────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #0d3158 100%);
  padding: var(--sp-16) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(249, 115, 22, .1) 0%, transparent 70%);
}

.cta-banner h2 {
  color: #fff;
  margin-bottom: var(--sp-4);
  position: relative;
}

.cta-banner p {
  color: rgba(255, 255, 255, .75);
  margin-bottom: var(--sp-8);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.0625rem;
  position: relative;
}

.cta-banner .btn {
  position: relative;
}

/* ── Tags ────────────────────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: var(--sp-1) var(--sp-3);
  background: var(--gray-100);
  color: var(--gray-600);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  margin: var(--sp-1);
}

/* ── Related Items ───────────────────────────────────────────── */
.related-section {
  background: var(--bg-alt);
  padding: var(--sp-16) 0;
  margin-top: var(--sp-12);
}

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.animate-in:nth-child(1) {
  animation-delay: 0.05s;
}

.animate-in:nth-child(2) {
  animation-delay: 0.1s;
}

.animate-in:nth-child(3) {
  animation-delay: 0.15s;
}

.animate-in:nth-child(4) {
  animation-delay: 0.2s;
}

.animate-in:nth-child(5) {
  animation-delay: 0.25s;
}

.animate-in:nth-child(6) {
  animation-delay: 0.3s;
}

/* Floating shapes (decorative) — used via .floating-shapes (plural) */

/* ── Print ───────────────────────────────────────────────────── */
@media print {

  .navbar,
  .footer,
  .cta-banner {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }
}

/* ── Utility ─────────────────────────────────────────────────── */
.text-center {
  text-align: center;
}

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

.mt-4 {
  margin-top: var(--sp-4);
}

.mt-8 {
  margin-top: var(--sp-8);
}

.mt-12 {
  margin-top: var(--sp-12);
}

.mb-4 {
  margin-bottom: var(--sp-4);
}

.mb-8 {
  margin-bottom: var(--sp-8);
}

.mb-12 {
  margin-bottom: var(--sp-12);
}

.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;
}

.mt-6 {
  margin-top: var(--sp-6);
}

/* ── Scroll-to-Top Button ───────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all var(--transition);
  z-index: 999;
  box-shadow: 0 4px 16px rgba(249, 115, 22, .3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

/* ── Brand Slider (Marquee) ─────────────────────── */
.brand-slider {
  padding: var(--sp-10) 0;
  overflow: hidden;
  background: var(--bg-alt);
}

.brand-slider__title {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: var(--sp-8);
}

.brand-slider__track {
  display: flex;
  gap: var(--sp-16);
  animation: marquee 25s linear infinite;
  width: max-content;
}

.brand-slider__track:hover {
  animation-play-state: paused;
}

.brand-slider__item {
  flex-shrink: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-400);
  white-space: nowrap;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.brand-slider__item:hover {
  color: var(--primary);
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}

/* ── Counter Animation ──────────────────────────── */
.stat__number {
  font-variant-numeric: tabular-nums;
}

/* ── Dark Mode ──────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-alt: #1e293b;
    --card-bg: #1e293b;
    --card-border: #334155;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-on-primary: #f1f5f9;
    --gray-50: #1e293b;
    --gray-100: #334155;
    --gray-200: #475569;
  }

  .navbar {
    background: rgba(15, 23, 42, .92);
    border-bottom-color: #334155;
  }

  .navbar__link {
    color: #cbd5e1;
  }

  .navbar__logo {
    color: #f1f5f9;
  }

  .breadcrumb {
    background: #1e293b;
    border-bottom-color: #334155;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    color: #f1f5f9;
  }

  .card__title a {
    color: #f1f5f9;
  }

  .product-detail__image {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  }

  .filter-tab {
    background: #334155;
    color: #cbd5e1;
  }

  .spec-table th {
    background: #334155;
    color: #f1f5f9;
  }

  .article-content strong {
    color: #f1f5f9;
  }

  .article-content h2 {
    border-bottom-color: #475569;
  }

  .footer {
    background: #020617;
  }

  .wave-divider svg path {
    transition: fill var(--transition);
  }

  .brand-slider {
    background: #1e293b;
  }
}