/* ============================================
   RomaTech — Modern Light Theme (Apple-inspired)
   ============================================ */

/* --- CSS Variables --- */
:root {
  /* Colors - Light Theme (default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f0f1f3;
  --bg-dark-section: #1a1a2e;
  --bg-dark-section-card: #232340;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-tertiary: #6e6e80;
  --text-on-dark: #e8e8f0;
  --text-on-dark-secondary: #a0a0b8;
  --accent: #0071e3;
  --accent-hover: #0062cc;
  --secondary: #8b5cf6;
  --secondary-hover: #7c3aed;
  --border: #e5e7eb;
  --border-light: #f0f1f3;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);
  --nav-bg: rgba(255, 255, 255, 0.8);
  --nav-border: rgba(0, 0, 0, 0.06);
  --card-bg: #ffffff;
  --card-border: #e5e7eb;
  --card-hover-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  --badge-bg: rgba(0, 113, 227, 0.08);
  --badge-text: #0071e3;
  --btn-secondary-bg: rgba(0, 113, 227, 0.06);
  --btn-secondary-text: #0071e3;
  --btn-secondary-border: rgba(0, 113, 227, 0.2);
  --footer-bg: #fafbfc;
  --footer-border: #e5e7eb;
  --gradient-hero: radial-gradient(ellipse at 30% 20%, rgba(0, 113, 227, 0.04) 0%, transparent 50%),
                   radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.03) 0%, transparent 50%);
  --gradient-text: linear-gradient(135deg, #0071e3, #8b5cf6);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: 0.3s ease;
}

[data-theme="dark"] {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #1a1a24;
  --bg-dark-section: #0f0f18;
  --bg-dark-section-card: #1a1a28;
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-tertiary: #6e6e80;
  --text-on-dark: #e8e8f0;
  --text-on-dark-secondary: #a0a0b8;
  --accent: #4d9ff7;
  --accent-hover: #6db3ff;
  --secondary: #a78bfa;
  --secondary-hover: #c4b5fd;
  --border: #1f1f2e;
  --border-light: #1a1a28;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
  --nav-bg: rgba(10, 10, 15, 0.85);
  --nav-border: rgba(255, 255, 255, 0.06);
  --card-bg: #12121a;
  --card-border: #1f1f2e;
  --card-hover-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  --badge-bg: rgba(77, 159, 247, 0.1);
  --badge-text: #4d9ff7;
  --btn-secondary-bg: rgba(77, 159, 247, 0.08);
  --btn-secondary-text: #4d9ff7;
  --btn-secondary-border: rgba(77, 159, 247, 0.25);
  --footer-bg: #0a0a0f;
  --footer-border: #1f1f2e;
  --gradient-hero: radial-gradient(ellipse at 30% 20%, rgba(77, 159, 247, 0.08) 0%, transparent 50%),
                   radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  --gradient-text: linear-gradient(135deg, #4d9ff7, #a78bfa);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: transparent;
  transition: background-color var(--transition), backdrop-filter var(--transition),
              border-color var(--transition), padding var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--nav-border);
  padding: 12px 0;
}

.nav__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  transition: color var(--transition);
}

.nav__logo-img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav__logo-text {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav__link {
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}

.nav__link:hover {
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

.nav__link--cta {
  background-color: var(--accent);
  color: #ffffff !important;
  font-weight: 600;
  padding: 8px 20px;
}

.nav__link--cta:hover {
  background-color: var(--accent-hover);
}

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: color var(--transition), background-color var(--transition);
}

.theme-toggle:hover {
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

.theme-toggle__icon--sun {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--moon {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

/* --- Language Switcher --- */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--border);
  transition: background-color var(--transition), border-color var(--transition);
}

.lang-switcher__btn {
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  border-radius: 6px;
  transition: color var(--transition), background-color var(--transition);
  letter-spacing: 0.02em;
}

.lang-switcher__btn:hover {
  color: var(--text-primary);
}

.lang-switcher__btn.active {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* --- Mobile Menu Toggle --- */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  gap: 5px;
  border-radius: 50%;
  transition: background-color var(--transition);
}

.nav__toggle:hover {
  background-color: var(--bg-secondary);
}

.nav__toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background-color var(--transition);
}

.nav__toggle.active span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav__toggle.active span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), background-color var(--transition);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu__link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  transition: color var(--transition), background-color var(--transition);
}

.mobile-menu__link:hover {
  color: var(--accent);
  background-color: var(--bg-secondary);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  background-color: var(--bg-primary);
  background-image: var(--gradient-hero);
  overflow: hidden;
  transition: background-color var(--transition);
}

.hero__container {
  max-width: 800px;
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero__badge {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 100px;
  margin-bottom: 32px;
  transition: background-color var(--transition), color var(--transition);
}

.hero__title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 24px;
  transition: color var(--transition);
}

.hero__title--accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
  transition: color var(--transition);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__visual {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.hero__gradient {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 113, 227, 0.06) 0%, transparent 70%);
  filter: blur(60px);
  transition: background var(--transition);
}

[data-theme="dark"] .hero__gradient {
  background: radial-gradient(circle, rgba(77, 159, 247, 0.1) 0%, transparent 70%);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn--primary {
  background-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.25);
}

.btn--primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.35);
  transform: translateY(-1px);
}

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

.btn--secondary:hover {
  background-color: rgba(0, 113, 227, 0.1);
  transform: translateY(-1px);
}

.btn--github {
  display: inline-flex;
  align-items: center;
}

.btn--outline {
  background: transparent;
  color: var(--text-on-dark);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 12px 28px;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-1px);
}

.btn--large {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* --- Sections --- */
.section {
  padding: 120px 24px;
  background-color: var(--bg-primary);
  transition: background-color var(--transition);
}

.section--alt {
  background-color: var(--bg-secondary);
}

.section--dark {
  background-color: var(--bg-dark-section);
}

.section--cta {
  background: linear-gradient(135deg, #1a1a2e 0%, #2d1b69 100%);
}

.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section__label--light {
  color: var(--secondary);
}

[data-theme="dark"] .section__label--light {
  color: var(--secondary);
}

.section__title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 16px;
  transition: color var(--transition);
}

.section__title--light {
  color: #ffffff;
}

.section__description {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.section__description--light {
  color: rgba(255, 255, 255, 0.7);
}

/* --- Services Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: transform var(--transition), box-shadow var(--transition),
              background-color var(--transition), border-color var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-hover-shadow);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--accent);
  margin-bottom: 20px;
  transition: background-color var(--transition), color var(--transition);
}

.service-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.service-card__text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  transition: color var(--transition);
}

/* --- Open Source Grid --- */
.oss-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.oss-card {
  display: block;
  background: var(--bg-dark-section-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.oss-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.oss-card__header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.oss-card__lang {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}

.oss-card__lang--csharp { background: rgba(104, 33, 122, 0.25); color: #c084fc; }
.oss-card__lang--ts { background: rgba(49, 120, 198, 0.25); color: #60a5fa; }
.oss-card__lang--js { background: rgba(247, 223, 30, 0.15); color: #fbbf24; }

.oss-card__new {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(40, 200, 64, 0.15);
  color: #4ade80;
}

.oss-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.oss-card__desc {
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 18px;
}

.oss-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.oss-card__tag {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

.oss-cta {
  text-align: center;
  margin-top: 40px;
}

.oss-examples {
  display: flex;
  justify-content: center;
  margin-top: 56px;
}

/* --- Code Carousel --- */
.code-carousel {
  position: relative;
  width: 100%;
  max-width: 480px;
}

.code-carousel .about-card {
  display: none;
}

.code-carousel .about-card.active {
  display: block;
  animation: fadeSlide 0.4s ease;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateX(10px); }
  to { opacity: 1; transform: translateX(0); }
}

.about-card {
  background: #1a1a2e;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.about-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.about-card__dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.about-card__dot:nth-child(1) { background: #ff5f57; }
.about-card__dot:nth-child(2) { background: #febc2e; }
.about-card__dot:nth-child(3) { background: #28c840; }

.about-card__filename {
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.4);
  margin-left: auto;
  font-family: 'Inter', sans-serif;
}

.about-card__body {
  padding: 24px;
}

.about-card__code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.82rem;
  line-height: 2;
  color: rgba(255, 255, 255, 0.85);
}

.code-keyword { color: #c678dd; }
.code-var { color: #e5c07b; }
.code-method { color: #61afef; }
.code-string { color: #98c379; }
.code-comment { color: rgba(255, 255, 255, 0.3); }
.code-decorator { color: #e5c07b; }
.code-type { color: #56b6c2; }
.code-num { color: #d19a66; }

.code-carousel__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
}

.code-carousel__btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.5);
  transition: all var(--transition);
}

.code-carousel__btn:hover {
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
}

.code-carousel__dots {
  display: flex;
  gap: 6px;
}

.code-carousel__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: all var(--transition);
}

.code-carousel__dot.active {
  background: var(--accent);
  transform: scale(1.3);
}

/* --- About Section --- */
.about-content--centered {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.about-content--centered .section__label,
.about-content--centered .section__title {
  text-align: center;
}

.about-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 16px;
  transition: color var(--transition);
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
  transition: border-color var(--transition);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat__number {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: color var(--transition);
}

.stat__label {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 4px;
  transition: color var(--transition);
}

.about-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 28px;
}

.about-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  transition: opacity var(--transition);
}

.about-link:hover {
  opacity: 0.7;
}

/* --- CTA Section --- */
.section--cta .cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta__title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 16px;
}

.cta__text {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
  line-height: 1.7;
}

.cta__actions .btn--primary {
  background: #ffffff;
  color: #1a1a2e;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
}

.cta__actions .btn--primary:hover {
  background: #f0f0f2;
  box-shadow: 0 6px 30px rgba(255, 255, 255, 0.25);
}

/* --- Footer --- */
.footer {
  padding: 48px 0 28px;
  background-color: var(--footer-bg);
  border-top: 1px solid var(--footer-border);
  transition: background-color var(--transition), border-color var(--transition);
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 20px;
}

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

.footer__logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.footer__name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition);
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.footer__social {
  display: flex;
  gap: 14px;
}

.footer__social a {
  color: var(--text-tertiary);
  transition: color var(--transition);
}

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

.footer__bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  transition: border-color var(--transition);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  transition: color var(--transition);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services-grid,
  .oss-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .section {
    padding: 80px 24px;
  }

  .services-grid,
  .oss-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    gap: 28px;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 100px 20px 60px;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .about-stats {
    flex-direction: column;
    gap: 16px;
  }

  .about-links {
    flex-direction: column;
    align-items: center;
  }

  .service-card {
    padding: 24px;
  }

  .oss-card {
    padding: 24px;
  }

  .footer__links {
    flex-wrap: wrap;
    gap: 12px;
  }
}