/* ============================================================
   NEURPORT DESIGN SYSTEM v2 — Components
   Modern, clean, professional. Target: 7/10 design quality.
   
   All colors/sizes reference tokens.css custom properties.
   Mobile-first responsive design.
   ============================================================ */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { 
  scroll-behavior: smooth; 
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { 
  color: var(--color-primary); 
  text-decoration: none; 
  transition: color var(--transition-fast); 
}
a:hover { color: var(--color-primary-light); }
ul, ol { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
}
h1 { 
  font-size: var(--font-size-5xl); 
  margin-bottom: var(--space-6);
  font-weight: var(--font-weight-extrabold);
}
h2 { 
  font-size: var(--font-size-4xl); 
  margin-bottom: var(--space-4);
}
h3 { 
  font-size: var(--font-size-2xl); 
  margin-bottom: var(--space-4);
}
h4 { 
  font-size: var(--font-size-xl); 
  margin-bottom: var(--space-3);
}
p { 
  margin-bottom: var(--space-4); 
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
}
.text-muted { color: var(--color-text-muted); }
.text-light { color: var(--color-text-light); }
.text-center { text-align: center; }
strong { font-weight: var(--font-weight-semibold); }

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.container--narrow {
  max-width: var(--content-width);
}
.container--wide {
  max-width: var(--wide-width);
}

/* ── Grid ── */
.grid {
  display: grid;
  gap: var(--space-8);
}
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ── Header / Navigation ── */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
  transition: background var(--transition-base);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.header__logo {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-primary);
  letter-spacing: var(--tracking-tight);
  transition: opacity var(--transition-fast);
}
.header__logo:hover { opacity: 0.8; color: var(--color-primary); }
.header__nav { display: none; }
.header__nav a {
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}
.header__nav a:hover { 
  background: var(--color-bg); 
  color: var(--color-primary); 
}
.header__actions { 
  display: flex; 
  align-items: center; 
  gap: var(--space-3); 
}

/* Language Switcher */
.lang-switch {
  display: flex;
  gap: 2px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  padding: 2px;
}
.lang-switch button {
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-1) var(--space-3);
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}
.lang-switch button:hover {
  color: var(--color-text);
}
.lang-switch button.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* Burger */
.header__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}
.header__burger span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}
@media (min-width: 768px) {
  .header__nav { display: flex; gap: var(--space-1); }
  .header__burger { display: none; }
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  z-index: var(--z-overlay);
  padding: var(--space-6);
  animation: slideDown 0.3s ease;
}
.mobile-nav.is-open { display: block; }
.mobile-nav a {
  display: block;
  padding: var(--space-4) var(--space-4);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}
.mobile-nav a:hover {
  color: var(--color-primary);
  padding-left: var(--space-6);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Hero ── */
.hero {
  padding: var(--section-padding) 0;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-secondary) 100%);
  color: var(--color-surface);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero h1 { 
  color: var(--color-surface); 
  margin-bottom: var(--space-6);
  font-size: var(--font-size-6xl);
}
.hero p {
  font-size: var(--font-size-xl);
  opacity: 0.9;
  max-width: var(--wide-width);
  margin: 0 auto var(--space-10);
  color: var(--color-surface);
  line-height: var(--line-height-relaxed);
}

/* ── Section ── */
.section {
  padding: var(--section-padding) 0;
}
.section--alt {
  background: var(--color-surface);
}
.section__title {
  text-align: center;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-4xl);
}
.section__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: var(--wide-width);
  margin: 0 auto var(--space-12);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
}

/* CTA Section */
.section--cta {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-surface);
  text-align: center;
  padding: var(--section-padding) 0;
}
.section--cta h2 {
  color: var(--color-surface);
  margin-bottom: var(--space-4);
}
.section--cta p {
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-8);
  font-size: var(--font-size-lg);
}
.section--cta .btn--secondary {
  border-color: rgba(255,255,255,0.4);
  color: var(--color-surface);
}
.section--cta .btn--secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.6);
}

/* ── Card ── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-border);
}
.card__icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-5);
  display: block;
}
.card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
  font-weight: var(--font-weight-semibold);
}
.card__text {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}
.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  transition: gap var(--transition-fast);
}
.card__link:hover {
  gap: var(--space-3);
}

/* ── Button ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-surface);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--secondary:hover {
  background: var(--color-primary);
  color: var(--color-surface);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}
.btn--ghost:hover {
  background: var(--color-bg);
}
.btn--accent {
  background: var(--color-accent);
  color: var(--color-surface);
  border-color: var(--color-accent);
}
.btn--accent:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}
.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--font-size-lg);
}

/* ── Footer ── */
.footer {
  background: var(--color-text);
  color: var(--color-surface);
  padding: var(--space-16) 0 var(--space-8);
}
.footer a { color: rgba(255,255,255,0.7); transition: color var(--transition-fast); }
.footer a:hover { color: var(--color-surface); }
.footer__grid {
  display: grid;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}
@media (min-width: 768px) {
  .footer__grid { grid-template-columns: repeat(3, 1fr); }
}
.footer__heading {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
  color: var(--color-surface);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  font-weight: var(--font-weight-semibold);
}
.footer__links a {
  display: block;
  padding: var(--space-1) 0;
  font-size: var(--font-size-sm);
}
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.5);
}
.lang-switch--footer button {
  color: rgba(255,255,255,0.5);
}
.lang-switch--footer button:hover {
  color: rgba(255,255,255,0.8);
}
.lang-switch--footer button.active {
  background: rgba(255,255,255,0.1);
  color: var(--color-surface);
}

/* ── Form ── */
.form-group { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(44, 85, 48, 0.1);
}
.form-textarea { min-height: 120px; resize: vertical; }

/* ── Badge / Tag ── */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-surface);
  letter-spacing: var(--tracking-wide);
}
.badge--outline {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

/* ── Testimonial ── */
.testimonial {
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.testimonial__quote {
  font-style: italic;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-5);
  line-height: var(--line-height-relaxed);
}
.testimonial__author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ── Stats ── */
.stats {
  display: grid;
  gap: var(--space-8);
  text-align: center;
}
@media (min-width: 640px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .stats { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
}
.stat {
  padding: var(--space-8);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}
.stat__number {
  font-family: var(--font-heading);
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-primary);
  letter-spacing: var(--tracking-tight);
}
.stat__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* ── Process Steps ── */
.process-steps {
  display: grid;
  gap: var(--space-8);
  counter-reset: step;
}
@media (min-width: 768px) {
  .process-steps { grid-template-columns: repeat(2, 1fr); }
}
.process-step {
  position: relative;
  padding: var(--space-8);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
}
.process-step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-surface);
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}
.process-step h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}
.process-step p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ── Utilities ── */
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.text-primary { color: var(--color-primary); }
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ── Selection ── */
::selection {
  background: var(--color-primary);
  color: var(--color-surface);
}

/* ── Blog ── */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 1px solid var(--color-border);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.blog-card__link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.blog-card__image {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.blog-card:hover .blog-card__image img {
  transform: scale(1.05);
}

.blog-card__content {
  padding: 1.5rem;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-muted, #888);
}

.blog-card__tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.blog-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: var(--color-primary-alpha, rgba(0,0,0,0.06));
  border-radius: var(--radius-sm, 4px);
  font-size: 0.75rem;
  color: var(--color-text-muted, #666);
}

.blog-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.blog-card__excerpt {
  font-size: 0.95rem;
  color: var(--color-text-muted, #666);
  line-height: 1.5;
}

.blog-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--color-text-muted, #888);
}

/* Blog Post */

.blog-post__header {
  margin-bottom: 2rem;
}

.blog-post__back {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: opacity 0.2s;
}

.blog-post__back:hover {
  opacity: 0.7;
}

.blog-post__title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.blog-post__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-muted, #888);
}

.blog-post__tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.blog-post__hero {
  width: 100%;
  max-height: 400px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin-bottom: 2rem;
}

.blog-post__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-post__body {
  font-size: 1.1rem;
  line-height: 1.8;
}

.blog-post__body h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.blog-post__body h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.blog-post__body p {
  margin-bottom: 1rem;
}

.blog-post__body ul, .blog-post__body ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.blog-post__body li {
  margin-bottom: 0.4rem;
}

.blog-post__body strong {
  font-weight: 600;
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .blog-post__title {
    font-size: 1.5rem;
  }
}

/* ── Blog Related Articles ── */

.blog-related {
  padding: 3rem 0;
  background: var(--color-surface);
}

.blog-related h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.blog-grid--related {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.blog-grid--related .blog-card {
  font-size: 0.95rem;
}

.blog-grid--related .blog-card__title {
  font-size: 1.1rem;
}

/* ── Blog Post Navigation (Prev/Next) ── */

.blog-nav {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border-light);
}

.blog-nav__inner {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}

.blog-nav__prev,
.blog-nav__next {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.5rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s ease;
  flex: 1;
  max-width: 48%;
}

.blog-nav__prev:hover,
.blog-nav__next:hover {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.blog-nav__prev span,
.blog-nav__next span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-nav__prev strong,
.blog-nav__next strong {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-nav__next {
  text-align: right;
  margin-left: auto;
}

@media (max-width: 640px) {
  .blog-nav__inner {
    flex-direction: column;
  }
  .blog-nav__prev,
  .blog-nav__next {
    max-width: 100%;
  }
  .blog-nav__next {
    text-align: left;
  }
}

/* ── Blog Post Reading Time / Author ── */

.blog-post__reading-time,
.blog-post__author {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.blog-post__reading-time::before {
  content: "·";
  margin-right: 0.5rem;
}

.blog-post__author::before {
  content: "·";
  margin-right: 0.5rem;
}