/* ================================================
   AWS — v4 Compass Navigation
   ================================================ */

:root {
  /* ============ Backgrounds — Light sky theme ============ */
  --color-bg: #EEF2F7;              /* ανοιχτό γκρι-μπλε (πιο ουρανός) */
  --color-bg-elevated: #F7F9FC;     /* ελαφρώς πιο ανοιχτό για cards */
  --color-bg-panel: #FFFFFF;        /* καθαρό λευκό για panels */

  /* ============ Text ============ */
  --color-text: #0A1628;            /* βαθύ navy (από το παλιό bg!) */
  --color-text-body: #3E5068;       /* medium για body */
  --color-text-muted: #7A8AA0;      /* muted για metadata */

  /* ============ Accents ============ */
  --color-accent: #FF544A;          /* logo plane red */
  --color-accent-hover: #E84338;
  --color-cyan: #0088B3;            /* πιο σκούρο cyan για να φαίνεται σε light bg */
  --color-warning: #E6A414;

  /* ============ Borders ============ */
  --color-border: #D8E0EA;
  --color-border-strong: #B8C5D6;

  /* ============ Hero gradient — ουρανός ============ */
  --gradient-hero:
    radial-gradient(ellipse 70% 55% at 50% 40%, rgba(200, 225, 245, 0.5) 0%, transparent 70%),
    linear-gradient(180deg, #DCE7F2 0%, #EEF2F7 50%, #F5F8FC 100%);

  /* ============ Typography ============ */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Sizes */
  --fs-hero: clamp(48px, 6vw, 88px);
  --fs-h2: 48px;
  --fs-h3: 28px;
  --fs-body-lg: 18px;
  --fs-body: 16px;
  --fs-small: 14px;
  --fs-xs: 12px;

  /* Layout */
  --container-max: 1440px;
  --container-padding: 32px;

  /* ============ LOGO BACKLIGHT (tuned για light bg) ============ */
  --glow-opacity: 1;
  --glow-width: 220%;
  --glow-height: 650%;
  --glow-blur: 70px;
  --glow-core: rgba(255, 255, 255, 0.9);         /* πολύ λευκό κέντρο */
  --glow-mid:  rgba(220, 235, 250, 0.55);         /* ανοιχτό γαλάζιο */
  --glow-outer: rgba(180, 210, 240, 0.25);        /* sky blue άκρες */

  --space-2xl: 150px;    /* από 120px */
}

/* ============ Reset & Base ============ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text-body);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

p { color: var(--color-text-body); max-width: 60ch; }
a { color: inherit; text-decoration: none; }

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============ HERO ============ */

.hero {
  position: relative;
  min-height: 85vh;        /* 🔥 από 100vh σε 85vh */
  display: flex;
  flex-direction: column;
  background: var(--gradient-hero);
  overflow: hidden;
  padding: 32px var(--container-padding);
}

/* Grid overlay (radar HUD feel) */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 145, 175, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 145, 175, 0.15) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.6;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 85%);
  pointer-events: none;
}

/* Decorative circles behind logo */
.hero::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border: 1px solid rgba(120, 145, 175, 0.2);
  border-radius: 50%;
  opacity: 0.8;
  pointer-events: none;
}
/* ============ Corner Annotations ============ */

/* ============ Corner Annotations ============ */

.hero-corner {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 3;
}

.hero-corner.bottom-right { bottom: 120px; right: 32px; align-items: flex-end; }

/* Contact block (top-right) */
.hero-contact {
  position: absolute;
  top: 32px;
  right: 32px;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.hero-contact .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-contact .label::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--color-text-muted);
}

.hero-contact a {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-text);
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.hero-contact a svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
  transition: opacity 0.25s ease;
}

.hero-contact a:hover svg {
  opacity: 1;
}

/* ============ LOGO-CENTRIC NAVIGATION ============ */

.nav-group.left  { justify-content: flex-end; }
.nav-group.right { justify-content: flex-start; }

/* Connector lines δεξιά/αριστερά του logo */
.nav-group.left::after {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-border-strong));
}

.nav-group.right::before {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  background: linear-gradient(to left, transparent, var(--color-border-strong));
}


.compass-item:hover {
  color: var(--color-accent);
}

/* Underline on hover */
.compass-item::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transform: translateX(-50%);
  transition: width 0.25s ease;
}

.compass-item:hover::after {
  width: calc(100% - 48px);
}

/* "+" tick on hover */
.compass-item::before {
  content: "+";
  position: absolute;
  top: 6px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-cyan);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.compass-item:hover::before {
  opacity: 1;
}

/* Active state */
.compass-item.active {
  color: var(--color-text);
}

.compass-item.active::after {
  width: 20px;
  background: var(--color-cyan);
}



.compass-center:hover {
  transform: scale(1.02);
  border-color: rgba(255, 255, 255, 0.7);
}

/* Vertical backlight beam */
.compass-center::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--glow-width);
  height: var(--glow-height);
  transform: translate(-50%, -50%) scaleY(0.2);
  background: radial-gradient(
    ellipse 22% 70% at center,
    var(--glow-core) 0%,
    var(--glow-mid) 30%,
    var(--glow-outer) 55%,
    transparent 78%
  );
  filter: blur(var(--glow-blur));
  opacity: 0;
  z-index: -1;
  pointer-events: none;
  animation: beamOpen 2.8s cubic-bezier(0.25, 1, 0.5, 1) 0.3s forwards;
}

@keyframes beamOpen {
  0%   { opacity: 0; transform: translate(-50%, -50%) scaleY(0.2); }
  100% { opacity: var(--glow-opacity); transform: translate(-50%, -50%) scaleY(1); }
}



/* Thin horizontal lines connecting logo to menu groups (option A only) */
.compass-inner:not(.stacked) .nav-group.left::after,
.compass-inner:not(.stacked) .nav-group.right::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--color-border-strong);
  align-self: center;
}

.compass-inner:not(.stacked) .nav-group.left {
  position: relative;
}

.compass-inner:not(.stacked) .nav-group.left::after {
  margin-left: 8px;
}

.compass-inner:not(.stacked) .nav-group.right::before {
  margin-right: 8px;
}

/* ============ Tagline below compass ============ */

.hero-tagline h1 {
  font-size: var(--fs-hero);
  line-height: 1.0;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.hero-tagline h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-tagline p {
  font-size: var(--fs-body-lg);
  color: var(--color-text-body);
  margin: 0 auto 32px;
  max-width: 540px;
}

.hero-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 84, 74, 0.3);
}

.hero-cta .arrow { transition: transform 0.25s ease; }
.hero-cta:hover .arrow { transform: translateX(4px); }

/* Bottom-right contact */
.contact-cta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);
  padding: 10px 18px;
  border: 1px solid var(--color-border-strong);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.5);
  transition: all 0.25s ease;
}

.contact-cta:hover {
  border-color: var(--color-text);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.8);
}

/* ============ Stats Strip ============ */

.stat:last-child { border-right: none; }

/* ============ Responsive ============ */

@media (max-width: 900px) {
  .compass-inner {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 24px;
  }

  .nav-group {
    justify-content: center !important;
  }

  .nav-group.left::after,
  .nav-group.right::before {
    display: none;
  }

  .compass-center {
    padding: 20px 32px;
  }

  .compass-center img {
    height: 90px;
  }
}

/* ================================================
   MOBILE MENU (Hamburger)
   ================================================ */

/* Hamburger button — hidden by default */
.menu-toggle {
  display: none;
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 200;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  cursor: pointer;
  padding: 0;
  transition: background 0.25s ease;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.9);
}

/* 3 lines inside hamburger */
.menu-toggle span {
  position: absolute;
  left: 50%;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transform-origin: center;
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

.menu-toggle span:nth-child(1) { top: 17px; transform: translateX(-50%); }
.menu-toggle span:nth-child(2) { top: 23px; transform: translateX(-50%); }
.menu-toggle span:nth-child(3) { top: 29px; transform: translateX(-50%); }

/* When menu is open → becomes an X */
.menu-toggle.is-open span:nth-child(1) {
  top: 23px;
  transform: translateX(-50%) rotate(45deg);
}
.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.is-open span:nth-child(3) {
  top: 23px;
  transform: translateX(-50%) rotate(-45deg);
}

/* ============ Mobile Overlay Menu ============ */

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 150;
  background: rgba(238, 242, 247, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 32px;
  padding: 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.4s ease;
  position: relative;
}

.mobile-menu.is-open a {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered entry animation */
.mobile-menu.is-open a:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.is-open a:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.is-open a:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.is-open a:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu.is-open a:nth-child(5) { transition-delay: 0.3s; }
.mobile-menu.is-open a:nth-child(6) { transition-delay: 0.35s; }

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

.mobile-menu a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.mobile-menu a:hover::after {
  width: 100%;
}

/* Contact info at bottom of mobile menu */
.mobile-menu-contact {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 320px;
}

.mobile-menu-contact a {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-body);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.mobile-menu-contact a svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

/* Prevent body scroll when menu open */
body.menu-open {
  overflow: hidden;
}

/* ============ Show hamburger on mobile ============ */
@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }
  
  /* Hide desktop menu groups when mobile */
  .nav-group {
    display: none;
  }
  
  /* Keep only logo centered */
  .compass-inner {
    grid-template-columns: 1fr;
    justify-items: center;
  }
}

/* ================================================
   PRODUCTS SECTION
   ================================================ */

.product-card:hover .product-cta {
  color: var(--color-accent);
}

.product-cta .arrow {
  font-family: var(--font-body);
  font-size: 18px;
  transition: transform 0.25s ease;
}

.product-card:hover .product-cta .arrow {
  transform: translateX(4px);
}

/* ============ Responsive ============ */

@media (max-width: 1100px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 700px) {
  .products-header {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .products {
    padding: 80px 0;
  }
}

/* ================================================
   SCROLL INDICATOR
   ================================================ */

.scroll-indicator {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--color-text-muted);
  transition: color 0.25s ease;
  z-index: 3;
}

.scroll-indicator:hover {
  color: var(--color-accent);
}

.scroll-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--color-text-muted) 0%, var(--color-text-muted) 50%, transparent 100%);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 40%;
  background: linear-gradient(to bottom, var(--color-accent) 0%, transparent 100%);
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { top: -40%; opacity: 0; }
  20% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* ================================================
   SECTION LABEL (shared)
   ================================================ */

.section-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-cyan);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.section-label::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--color-cyan);
}

/* ================================================
   ABOUT SECTION
   ================================================ */

.about {
  position: relative;
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
  scroll-margin-top: 110px;
}

.about-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  align-items: start;
}

.about-header h2 {
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.03em;
}

.about-lead {
  font-size: var(--fs-body-lg);
  line-height: 1.5;
  color: var(--color-text);
  margin-bottom: 24px;
  max-width: 600px;
}

.about-content p {
  max-width: 600px;
}

.about-content strong {
  color: var(--color-text);
  font-weight: 600;
}

.about-pillars {
  margin-top: 56px;
  display: grid;
  gap: 32px;
}

.pillar {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  padding-top: 4px;
}

.pillar-label {
  grid-column: 2;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.pillar p {
  grid-column: 2;
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.55;
}

@media (max-width: 900px) {
  .about-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ================================================
   PRODUCT — FTS
   ================================================ */

.product {
  position: relative;
  background: var(--color-bg-elevated);
  padding: var(--space-2xl) 0;
  scroll-margin-top: 110px;
}

/* ---------- Product Hero ---------- */

.product-hero {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  margin-bottom: var(--space-2xl);
}

.product-hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}

.product-hero-text h2 {
  font-size: clamp(80px, 14vw, 180px);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.05em;
  margin-bottom: 24px;
  color: var(--color-text);
}

.product-hero-text h2 .accent {
  color: var(--color-accent);
}

.product-tagline {
  font-size: var(--fs-body-lg);
  line-height: 1.5;
  color: var(--color-text);
  max-width: 540px;
  margin-bottom: 48px;
}

.product-hero-meta {
  display: grid;
  gap: 20px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  max-width: 540px;
}

.meta-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  align-items: baseline;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.meta-value {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--color-text);
  font-weight: 500;
}

/* Product visual */
.product-hero-visual {
  position: relative;
}

.product-visual-frame {
  position: relative;
  aspect-ratio: 1;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-visual-frame::before,
.product-visual-frame::after,
.product-visual-frame > svg + .visual-id {
  pointer-events: none;
}

/* corner ticks */
.product-visual-frame::before,
.product-visual-frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--color-border-strong);
}

.product-visual-frame::before {
  top: 12px;
  left: 12px;
  border-right: none;
  border-bottom: none;
}

.product-visual-frame::after {
  bottom: 12px;
  right: 12px;
  border-left: none;
  border-top: none;
}

.product-visual-frame svg {
  width: 80%;
  height: 80%;
}

.visual-id {
  position: absolute;
  bottom: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .product-hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .product-hero-text h2 {
    font-size: clamp(64px, 20vw, 120px);
  }
}

/* ---------- Features ---------- */

.features {
  max-width: var(--container-max);
  margin: 0 auto var(--space-2xl);
  padding: 0 var(--container-padding);
}

.features-heading {
  font-size: clamp(32px, 3.5vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  max-width: 700px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  border-top: 1px solid var(--color-border);
  padding-top: 48px;
}

.feature {
  display: flex;
  flex-direction: column;
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.feature h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature p {
  font-size: var(--fs-small);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }
}

@media (max-width: 560px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Variants ---------- */

.variants {
  max-width: var(--container-max);
  margin: 0 auto var(--space-2xl);
  padding: 0 var(--container-padding);
}

.variants-heading {
  font-size: clamp(32px, 3.5vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.variants-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.variant {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
}

.variant:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -10px rgba(10, 22, 40, 0.12);
}

.variant-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.variant-id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.variant-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  padding: 5px 10px;
  border-radius: 2px;
  text-transform: uppercase;
}

.tag-retrofit { color: var(--color-accent); background: rgba(255, 84, 74, 0.10); }
.tag-medium   { color: var(--color-cyan);    background: rgba(0, 136, 179, 0.10); }
.tag-long     { color: var(--color-accent);  background: rgba(255, 84, 74, 0.10); }

.variant-image {
  aspect-ratio: 16 / 10;
  background: var(--color-bg-elevated);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  overflow: hidden;
}

.variant-image svg {
  width: 80%;
  height: 80%;
}

.variant-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.variant-desc {
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--color-text-body);
  margin-bottom: 20px;
  flex: 1;
}

.variant-specs {
  list-style: none;
  padding: 16px 0 0;
  margin: 0;
  border-top: 1px solid var(--color-border);
  display: grid;
  gap: 10px;
}

.variant-specs li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.variant-specs li span:first-child {
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 10px;
  align-self: center;
}

.variant-specs li span:last-child {
  color: var(--color-text);
  font-weight: 500;
  text-align: right;
}

@media (max-width: 1000px) {
  .variants-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
  .variants-grid { grid-template-columns: 1fr; }
}

/* ---------- Specs Table ---------- */

.specs {
  max-width: var(--container-max);
  margin: 0 auto var(--space-2xl);
  padding: 0 var(--container-padding);
}

.specs-heading {
  font-size: clamp(32px, 3.5vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.specs-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}

.specs-table th,
.specs-table td {
  padding: 16px 20px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 13px;
  border-bottom: 1px solid var(--color-border);
}

.specs-table th {
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg-elevated);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.12em;
  border-bottom: 1px solid var(--color-border-strong);
}

.specs-table td.row-label {
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.1em;
  background: var(--color-bg-elevated);
  width: 200px;
}

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

.specs-table tr:last-child td {
  border-bottom: none;
}

.specs-table tbody tr:hover {
  background: rgba(0, 212, 255, 0.02);
}

/* ---------- Product CTA block ---------- */

.product-cta-block {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px var(--container-padding);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.product-cta-block h3 {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.product-cta-block p {
  font-size: var(--fs-body-lg);
  color: var(--color-text-body);
  margin: 0 auto 32px;
  max-width: 540px;
}

.cta-buttons {
  display: flex;
  gap: 24px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

/* Re-define .hero-cta here so we keep the button style usable */
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all 0.25s ease;
}

.hero-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 84, 74, 0.3);
}

.hero-cta .arrow { transition: transform 0.25s ease; }
.hero-cta:hover .arrow { transform: translateX(4px); }

.btn-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  transition: color 0.25s ease;
}

.btn-link:hover {
  color: var(--color-accent);
}

/* ================================================
   SITE HEADER — Compact logo-centric bar
   ================================================ */

.site-header {
  top: 0;
  z-index: 100;
  background: rgba(238, 242, 247, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.site-header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 24px var(--container-padding);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
  min-height: 96px;
}

/* ---------- Menu groups ---------- */

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

.nav-group.left  { justify-content: flex-end; }
.nav-group.right { justify-content: flex-start; }

/* Connector lines */
.nav-group.left::after,
.nav-group.right::before {
  content: "";
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-border-strong);
}

/* Menu item */
.nav-item {
  position: relative;
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-body);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.nav-item:hover {
  color: var(--color-accent);
}

.nav-item::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.nav-item:hover::after {
  transform: scaleX(1);
}

/* ---------- Central logo ---------- */

.header-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 0;
  transition: transform 0.3s ease;
}

.header-logo:hover {
  transform: scale(1.02);
}

.header-logo img {
  height: 85px;
  width: auto;
  display: block;
  filter: drop-shadow(0 2px 8px rgba(10, 22, 40, 0.12));
}

/* ---------- Contact info (top-right corner) ---------- */

.header-contact {
  position: absolute;
  top: 10px;
  right: var(--container-padding);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  font-size: 11px;
}

.header-contact a {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.25s ease;
}

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

.header-contact a svg {
  width: 11px;
  height: 11px;
  opacity: 0.7;
}

/* ================================================
   Responsive
   ================================================ */

@media (max-width: 900px) {
  .site-header-inner {
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 16px;
    min-height: 80px;
  }

  .nav-group,
  .header-contact {
    display: none;
  }

  .header-logo img {
    height: 80px;
  }
}

/* ================================================
   SCROLL TO TOP BUTTON
   ================================================ */

.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 1000;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  box-shadow: 0 4px 20px rgba(255, 84, 74, 0.3);
}

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

.scroll-top:hover {
  background: var(--color-accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(255, 84, 74, 0.4);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
}

.scroll-top:hover svg {
  transform: translateY(-2px);
}

/* ================================================
   SECTION SEPARATORS
   ================================================ */

/* Διακριτική γραμμή + tick mark ανάμεσα στα sections */
.section-divider {
  position: relative;
  height: 1px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-divider::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--container-padding);
  right: var(--container-padding);
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    var(--color-border) 20%,
    var(--color-border-strong) 50%,
    var(--color-border) 80%,
    transparent 100%
  );
}

.section-divider::after {
  content: "+";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-cyan);
  background: var(--color-bg);
  padding: 0 16px;
  line-height: 1;
}

/* Για separator ανάμεσα σε About (bg) και Product (bg-elevated) */
.section-divider.on-elevated::after {
  background: var(--color-bg-elevated);
}