/* ============================================
   Revelectrik Design System
   ============================================ */

/* --- Custom Properties --- */
:root {
  --color-primary: #009dc9;
  --color-accent: #00eaff;
  --color-teal: #00d4aa;
  --color-dark: #0a0f1a;
  --color-dark-card: #111827;
  --color-light: #ebebeb;
  --color-red: #e5194a;
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-600: #4b5563;
  --color-gray-400: #9ca3af;
  --color-gray-300: #d1d5db;
  --font-primary: 'TacticSans', Arial, Helvetica, sans-serif;
  --container-max: 1200px;
  --container-narrow: 900px;
  --nav-height: 70px;
  --radius-sm: 7px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

/* --- 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-primary);
  color: var(--color-white);
  background: var(--color-dark);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }
ul, ol { list-style: none; }
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { line-height: 1.2; font-weight: 700; }
h1 { font-size: 3rem; text-transform: uppercase; letter-spacing: 0.02em; }
h2 { font-size: 2rem; text-transform: uppercase; letter-spacing: 0.02em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }
p { margin-bottom: 1rem; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-teal { color: var(--color-teal); }
.text-gray { color: var(--color-gray-400); }
.text-center { text-align: center; }
.text-upper { text-transform: uppercase; letter-spacing: 0.05em; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow {
  max-width: var(--container-narrow);
}
.section {
  padding: 80px 0;
}
.section--light {
  background: var(--color-light);
  color: var(--color-dark);
}
.section--dark {
  background: var(--color-dark);
}
.section--black {
  background: var(--color-black);
}
.section__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.section__title {
  font-size: 2.25rem;
  margin-bottom: 16px;
}
.section__subtitle {
  color: var(--color-gray-400);
  font-size: 1.1rem;
  max-width: 700px;
  margin-bottom: 48px;
}

/* --- Grid --- */
.grid {
  display: grid;
  gap: 24px;
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.flex {
  display: flex;
  gap: 16px;
}
.flex--center {
  align-items: center;
  justify-content: center;
}
.flex--between {
  justify-content: space-between;
  align-items: center;
}
.flex--col {
  flex-direction: column;
}
.flex--wrap {
  flex-wrap: wrap;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 15, 26, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  height: var(--nav-height);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.navbar__logo img {
  height: 40px;
  width: auto;
}
.navbar__links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.navbar__links a {
  color: var(--color-white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  transition: color var(--transition);
}
.navbar__links a:hover,
.navbar__links a.active {
  color: var(--color-accent);
}
.navbar__cta {
  margin-left: 12px;
}
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition);
}
.navbar__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 15, 26, 0.98);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  z-index: 999;
}
.navbar__mobile.open {
  display: flex;
}
.navbar__mobile a {
  color: var(--color-white);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}
.navbar__mobile a:hover {
  color: var(--color-accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition);
  min-height: 44px;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-white);
}
.btn--primary:hover {
  background: transparent;
  color: var(--color-white);
}
.btn--cta {
  background: var(--color-accent);
  color: var(--color-dark);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
}
.btn--cta:hover {
  background: transparent;
  color: var(--color-accent);
}
.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}
.btn--outline:hover {
  background: var(--color-white);
  color: var(--color-dark);
}
.btn--dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
}
.btn--dark:hover {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn--sm {
  padding: 8px 20px;
  font-size: 0.8rem;
}

/* --- Cards --- */
.card {
  background: var(--color-dark-card);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 157, 201, 0.1);
}
.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--color-accent);
}
.card__title {
  font-size: 1.125rem;
  margin-bottom: 8px;
}
.card__text {
  color: var(--color-gray-400);
  font-size: 0.95rem;
  line-height: 1.6;
}
.card--highlight {
  border-color: var(--color-accent);
  box-shadow: 0 0 30px rgba(0, 234, 255, 0.08);
}

/* --- Placeholder (for missing assets) --- */
.placeholder {
  background: #1e293b;
  border: 2px dashed var(--color-gray-600);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-height: 200px;
}

/* --- Forms --- */
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: var(--color-gray-300);
  font-weight: 600;
}
.form-group label .req {
  color: var(--color-red);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  min-height: 44px;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-accent);
}
.form-group textarea {
  resize: vertical;
  min-height: 100px;
}
.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%239ca3af'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.form-group select option {
  background: var(--color-dark-card);
}
.form-group.field-error input,
.form-group.field-error select,
.form-group.field-error textarea {
  border-color: var(--color-red);
}
.inline-error {
  display: none;
  color: var(--color-red);
  font-size: 0.8rem;
  margin-top: 4px;
}
.inline-error.show {
  display: block;
}
.form-privacy {
  font-size: 0.8rem;
  color: var(--color-gray-400);
  margin-top: 12px;
}

/* --- Section-specific: light bg forms --- */
.section--light .form-group input,
.section--light .form-group textarea,
.section--light .form-group select {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.15);
  color: var(--color-dark);
}
.section--light .form-group input:focus,
.section--light .form-group textarea:focus,
.section--light .form-group select:focus {
  border-color: var(--color-primary);
}
.section--light .form-group label {
  color: var(--color-dark);
}

/* --- Modal --- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal-overlay.open {
  display: flex;
}
.modal-card {
  background: var(--color-dark-card);
  border-radius: var(--radius-md);
  padding: 40px;
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  border: 1px solid rgba(255,255,255,0.08);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--color-gray-400);
  font-size: 1.5rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover {
  color: var(--color-white);
}
.modal-title {
  font-size: 1.5rem;
  margin-bottom: 24px;
}
.modal-success,
.modal-error {
  display: none;
  text-align: center;
  padding: 24px 0;
}
.modal-success.show,
.modal-error.show {
  display: block;
}
.modal-success h3 {
  color: var(--color-teal);
  margin-bottom: 8px;
}
.modal-error p {
  color: var(--color-red);
}

/* --- Footer --- */
.footer {
  background: var(--color-black);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 60px 0 32px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer__brand p {
  color: var(--color-gray-400);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 300px;
}
.footer__heading {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: 16px;
}
.footer__links a {
  display: block;
  color: var(--color-gray-300);
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.footer__links a:hover {
  color: var(--color-accent);
}
.footer__contact a,
.footer__contact p {
  color: var(--color-gray-300);
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer__copy {
  color: var(--color-gray-600);
  font-size: 0.8rem;
}
.footer__social {
  display: flex;
  gap: 16px;
}
.footer__social a {
  color: var(--color-gray-400);
  font-size: 1.2rem;
}
.footer__social a:hover {
  color: var(--color-accent);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}
.hero__content {
  max-width: 650px;
}
.hero__label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.hero__title {
  font-size: 3.5rem;
  line-height: 1.08;
  margin-bottom: 24px;
}
.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-gray-300);
  margin-bottom: 32px;
  max-width: 540px;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero__image {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  max-width: 600px;
  opacity: 0.2;
}

/* --- Stats Row --- */
.stats-row {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 48px;
}
.stat {
  text-align: center;
}
.stat__value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}
.stat__label {
  font-size: 0.75rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* --- Product Cards --- */
.product-card {
  background: var(--color-dark-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition);
}
.product-card:hover {
  transform: translateY(-4px);
}
.product-card__image {
  height: 240px;
  background: #1e293b;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-card__body {
  padding: 28px;
}
.product-card__label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-teal);
  margin-bottom: 8px;
}
.product-card__title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}
.product-card__text {
  color: var(--color-gray-400);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

/* --- Team/Advisor cards --- */
.team-card {
  text-align: center;
}
.team-card__photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  background: #1e293b;
}
.team-card__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.team-card__name {
  font-size: 1rem;
  margin-bottom: 4px;
}
.team-card__title {
  font-size: 0.85rem;
  color: var(--color-gray-400);
}
.team-card__text {
  font-size: 0.9rem;
  color: var(--color-gray-400);
  margin-top: 8px;
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Partner Logos --- */
.partners-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}
.partners-row img {
  height: 50px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.6;
  transition: opacity var(--transition);
}
.partners-row img:hover {
  opacity: 1;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 10px 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  color: var(--color-gray-400);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn.active,
.tab-btn:hover {
  background: var(--color-accent);
  color: var(--color-dark);
  border-color: var(--color-accent);
}
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
}

/* --- Spec Table --- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
}
.spec-table th,
.spec-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.spec-table th {
  color: var(--color-accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 200px;
  white-space: nowrap;
}
.spec-table td {
  color: var(--color-gray-300);
  font-size: 0.9rem;
}

/* --- Pricing Cards --- */
.pricing-card {
  background: var(--color-dark-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  display: flex;
  flex-direction: column;
}
.pricing-card--popular {
  border-color: var(--color-accent);
  position: relative;
}
.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-dark);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 16px;
  border-radius: 20px;
}
.pricing-card__name {
  font-size: 1.5rem;
  margin-bottom: 8px;
}
.pricing-card__tagline {
  color: var(--color-gray-400);
  font-size: 0.9rem;
  margin-bottom: 24px;
}
.pricing-card__price {
  font-size: 1.75rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 24px;
}
.pricing-card__features {
  text-align: left;
  flex: 1;
  margin-bottom: 28px;
}
.pricing-card__features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--color-gray-300);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.pricing-card__features li::before {
  content: '✓';
  color: var(--color-teal);
  font-weight: 700;
  flex-shrink: 0;
}
.pricing-card__features li.excluded {
  text-decoration: line-through;
  color: var(--color-gray-600);
}
.pricing-card__features li.excluded::before {
  content: '—';
  color: var(--color-gray-600);
}

/* --- Bio Section --- */
.bio {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 48px;
  align-items: start;
}
.bio__photo {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #1e293b;
}
.bio__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.bio__name {
  font-size: 2rem;
  margin-bottom: 4px;
}
.bio__title {
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: 24px;
}
.bio__section-heading {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-teal);
  margin: 24px 0 8px;
}
.bio__text {
  color: var(--color-gray-300);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Cookie Banner --- */
.cookie-banner {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-dark-card);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 16px 24px;
  z-index: 3000;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.cookie-banner.show {
  display: flex;
}
.cookie-banner p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-gray-300);
}
.cookie-banner button {
  background: var(--color-accent);
  color: var(--color-dark);
  border: none;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
}

/* --- Lazy-load fade-in --- */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.5s ease;
}
img[loading="lazy"].loaded,
img.loaded {
  opacity: 1;
}

/* --- Contact selector --- */
.contact-selector {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.contact-selector label {
  cursor: pointer;
}
.contact-selector input[type="radio"] {
  display: none;
}
.contact-selector .selector-btn {
  display: inline-block;
  padding: 10px 24px;
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.contact-selector input[type="radio"]:checked + .selector-btn {
  border-color: var(--color-accent);
  background: rgba(0, 234, 255, 0.1);
  color: var(--color-accent);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  h1, .hero__title { font-size: 2.5rem; }
  .section__title { font-size: 1.75rem; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .bio { grid-template-columns: 200px 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .navbar__links { display: none; }
  .navbar__hamburger { display: flex; }
  h1, .hero__title { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .section { padding: 56px 0; }
  .section__title { font-size: 1.5rem; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: calc(var(--nav-height) + 40px); padding-bottom: 60px; }
  .hero__image { display: none; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .stats-row { gap: 24px; }
  .stat { flex: 1; min-width: 80px; }
  .footer__grid { grid-template-columns: 1fr; gap: 24px; }
  .footer__bottom { flex-direction: column; gap: 16px; text-align: center; }
  .bio { grid-template-columns: 1fr; }
  .bio__photo { max-width: 250px; margin: 0 auto; }
  .partners-row { gap: 32px; }
  .partners-row img { height: 36px; }
  .cookie-banner { flex-direction: column; gap: 12px; text-align: center; }
  .pricing-card { padding: 28px; }
  .modal-card { padding: 24px; }
  .spec-table th { width: 140px; }
}

@media (max-width: 375px) {
  .container { padding: 0 16px; }
  h1, .hero__title { font-size: 1.75rem; }
  .section { padding: 40px 0; }
}