/* ============================================
   ätomo by MacBOT — Design System & Styles
   ============================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --color-primary: #F1592A;
  --color-primary-dark: #D94415;
  --color-primary-light: #FF7A50;
  --color-secondary: #0F172A;
  --color-accent: #F1592A;
  --color-accent-hover: #D94415;

  --color-bg: #F8FAFB;
  --color-surface: #FFFFFF;
  --color-surface-alt: #FFF5F2;

  --color-text: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #94A3B8;
  --color-text-inverse: #FFFFFF;

  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.16);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  --max-width: 1200px;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p {
  color: var(--color-text-secondary);
  max-width: 680px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Section --- */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header p {
  margin: 16px auto 0;
  font-size: 1.1rem;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-surface-alt);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-inverse);
  border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.8);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}

.btn-accent:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.9rem;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.nav.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-inverse);
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  opacity: 1;
}

.nav.scrolled .nav-links a {
  color: var(--color-text);
  opacity: 0.7;
}

.nav.scrolled .nav-links a:hover,
.nav.scrolled .nav-links a.active {
  color: var(--color-primary);
  opacity: 1;
}

.nav-cta {
  padding: 10px 24px !important;
  background: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
  border-radius: var(--radius-full) !important;
  opacity: 1 !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
}

/* Hamburger Menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-inverse);
  transition: all var(--transition-fast);
  border-radius: 2px;
}

.nav.scrolled .nav-toggle span {
  background: var(--color-text);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(241,89,42,0.5) 100%);
  z-index: -1;
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  padding-top: var(--nav-height);
}

.hero-content h1 {
  color: var(--color-text-inverse);
  max-width: 700px;
  margin-bottom: 24px;
}

.hero-content p {
  color: rgba(255,255,255,0.8);
  font-size: 1.2rem;
  max-width: 560px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-stat {
  text-align: left;
}

.hero-stat .value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-inverse);
}

.hero-stat .label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

/* ============================================
   Features Section
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.feature-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card h4 {
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  margin: 0 auto;
}

/* ============================================
   ROI Calculator Section
   ============================================ */
.calculator-section {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
}

.calculator-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.calculator-info h2 {
  color: var(--color-text-inverse);
  margin-bottom: 20px;
}

.calculator-info p {
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
}

.calculator-form {
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
}

.calc-field {
  margin-bottom: 24px;
}

.calc-field label {
  display: block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 8px;
  font-weight: 500;
}

.calc-field input {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  color: var(--color-text-inverse);
  font-size: 1.1rem;
  font-family: var(--font-body);
  transition: border-color var(--transition-fast);
}

.calc-field input:focus {
  outline: none;
  border-color: var(--color-primary-light);
}

.calc-results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.calc-result-card {
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
}

.calc-result-card.highlight {
  background: var(--color-primary);
  grid-column: span 2;
}

.calc-result-card .result-value {
  font-size: 1.6rem;
  font-weight: 800;
  display: block;
}

.calc-result-card .result-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
  display: block;
}

.calc-result-card.highlight .result-label {
  color: rgba(255,255,255,0.85);
}

/* ============================================
   Applications Section
   ============================================ */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.app-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

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

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

.app-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.9) 0%, rgba(15,23,42,0.2) 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  transition: background var(--transition-normal);
}

.app-card:hover .app-card-overlay {
  background: linear-gradient(to top, rgba(241,89,42,0.9) 0%, rgba(15,23,42,0.3) 60%);
}

.app-card h3 {
  color: var(--color-text-inverse);
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.app-card p {
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  max-width: none;
}

.app-card .app-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 16px;
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--transition-normal);
}

.app-card:hover .app-link {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, #1A1A2E 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  text-align: center;
  padding: 100px 0;
}

.cta-section h2 {
  color: var(--color-text-inverse);
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255,255,255,0.8);
  font-size: 1.15rem;
  margin: 0 auto 40px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-contact {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.2);
  flex-wrap: wrap;
}

.cta-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
}

.cta-contact-item svg {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

/* ============================================
   Page Banner (Subpages)
   ============================================ */
.page-banner {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.page-banner-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.8) 0%, rgba(241,89,42,0.5) 100%);
  z-index: -1;
}

.page-banner h1 {
  color: var(--color-text-inverse);
  text-align: center;
}

.page-banner p {
  color: rgba(255,255,255,0.8);
  text-align: center;
  font-size: 1.2rem;
  margin-top: 12px;
}

/* ============================================
   Specs Table (Products page)
   ============================================ */
.specs-section {
  background: var(--color-surface);
}

.specs-group {
  margin-bottom: 48px;
}

.specs-group h3 {
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

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

.specs-table tr {
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.specs-table tr:hover {
  background: var(--color-surface-alt);
}

.specs-table td {
  padding: 16px 20px;
  font-size: 0.95rem;
}

.specs-table td:first-child {
  font-weight: 600;
  color: var(--color-text);
  width: 40%;
}

.specs-table td:last-child {
  color: var(--color-text-secondary);
}

/* ============================================
   FAQ Accordion
   ============================================ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-primary);
}

.faq-question {
  width: 100%;
  background: var(--color-surface);
  border: none;
  padding: 20px 24px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--color-text);
}

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.active .faq-question::after {
  content: '\2212';
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* ============================================
   Company Page — Timeline
   ============================================ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
  opacity: 0.8;
  border-radius: 2px;
}

.timeline-item {
  padding-left: 40px;
  padding-bottom: 48px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
}

.timeline-item h4 {
  color: var(--color-primary);
  font-size: 0.9rem;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: 1px;
}

.timeline-item h3 {
  margin-bottom: 12px;
}

.timeline-item p {
  font-size: 1rem;
}

/* ============================================
   Advantages Grid
   ============================================ */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.advantage-card {
  display: flex;
  gap: 20px;
  padding: 32px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

.advantage-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.advantage-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.advantage-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.advantage-card h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.advantage-card p {
  font-size: 0.92rem;
}

/* ============================================
   Mission Cards
   ============================================ */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mission-card {
  text-align: center;
  padding: 48px 32px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

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

.mission-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
}

.mission-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.mission-card h4 {
  margin-bottom: 12px;
  color: var(--color-primary);
}

.mission-card p {
  margin: 0 auto;
  font-size: 0.95rem;
}

/* ============================================
   Application Detail (alternating layout)
   ============================================ */
.app-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.app-detail:last-child {
  border-bottom: none;
}

.app-detail:nth-child(even) .app-detail-image {
  order: 2;
}

.app-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.app-detail-image img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.app-detail-content h3 {
  margin-bottom: 16px;
  font-size: 1.8rem;
}

.app-detail-content > p {
  margin-bottom: 24px;
  font-size: 1.05rem;
  max-width: none;
}

.app-detail-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.app-spec-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-primary-dark);
}

/* ============================================
   User Guidance — Accordion Docs
   ============================================ */
.docs-list {
  max-width: 800px;
  margin: 0 auto;
}

.doc-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.doc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.doc-header:hover {
  background: var(--color-surface-alt);
}

.doc-header h4 {
  font-size: 1.05rem;
}

.doc-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.doc-item.active .doc-body {
  max-height: 800px;
}

.doc-body-inner {
  padding: 0 24px 24px;
}

.doc-body-inner ul {
  list-style: disc;
  padding-left: 20px;
}

.doc-body-inner li {
  padding: 6px 0;
  color: var(--color-text-secondary);
}

.doc-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 16px;
  transition: background var(--transition-fast);
}

.doc-download:hover {
  background: var(--color-primary-dark);
}

/* ============================================
   News Cards
   ============================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

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

.news-card-image {
  aspect-ratio: 16/10;
  overflow: hidden;
}

.news-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.news-card:hover .news-card-image img {
  transform: scale(1.05);
}

.news-card-body {
  padding: 24px;
}

.news-card-date {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: 10px;
}

.news-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-card p {
  font-size: 0.92rem;
  max-width: none;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-secondary);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand img {
  height: 32px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  max-width: 300px;
}

.footer h5 {
  color: var(--color-text-inverse);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary-light);
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
  opacity: 0.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
}

.footer-social svg {
  width: 18px;
  height: 18px;
  fill: rgba(255,255,255,0.6);
}

/* ============================================
   Scroll Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

  .calculator-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .app-detail {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .app-detail:nth-child(even) .app-detail-image {
    order: 0;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section {
    padding: 64px 0;
  }

  /* Mobile Nav */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 32px 32px;
    gap: 0;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-xl);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    color: rgba(255,255,255,0.7) !important;
    padding: 14px 0;
    width: 100%;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    font-size: 1rem;
  }

  .nav-links a:hover {
    color: var(--color-primary-light) !important;
  }

  .nav-toggle {
    display: flex;
  }

  /* Mobile adjustments */
  .hero {
    min-height: 90vh;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

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

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .page-banner {
    height: 300px;
  }

  .calc-results {
    grid-template-columns: 1fr;
  }

  .calc-result-card.highlight {
    grid-column: span 1;
  }

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

  .cta-contact {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

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