/* Full dark theme styling */
:root {
  --bg: #0b0e13;
  --surface: #121721;
  --muted: #93a0b4;
  --text: #e6edf6;
  --brand: #4da3ff;
  --brand-2: #6ce0ff;
  --border: #1b2330;
  --ring: rgba(77, 163, 255, 0.35);
}
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: ui-sans-serif, system-ui, Segoe UI, Roboto, Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
}
html {
  scroll-behavior: smooth;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
}
a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  text-decoration: underline;
}
.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}
.section {
  padding: 64px 0;
}
.section-head {
  margin-bottom: 24px;
}
.section-head h1,
.section-head h2 {
  margin: 0 0 8px 0;
}
.muted {
  color: var(--muted);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11, 14, 19, 0.7);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

/* Header logo size */
.logo-img {
  height: 140px; /* bigger desktop logo */
  width: auto;
  display: block;
  margin: 0;
}
/* Smaller logo in the footer */
.footer-logo .logo-img {
  height: 90px;
}

.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #04101d;
  font-weight: 900;
}
.logo-text {
  letter-spacing: 0.3px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px;
  height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 9px;
  right: 9px;
  height: 2px;
  background: #c9d4e6;
  border-radius: 2px;
  transition: 0.2s;
}
.nav-toggle span:nth-child(1) {
  top: 12px;
}
.nav-toggle span:nth-child(2) {
  top: 19px;
}
.nav-toggle span:nth-child(3) {
  top: 26px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu a {
  padding: 8px 10px;
  border-radius: 10px;
}
.nav-menu .btn {
  padding: 10px 14px;
}

/* Hero */
.hero {
  background: radial-gradient(
      1200px 500px at 80% -50%,
      rgba(108, 224, 255, 0.08),
      transparent
    ),
    radial-gradient(
      1000px 400px at 10% -40%,
      rgba(77, 163, 255, 0.12),
      transparent
    );
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  padding: 56px 0 24px;
}
.hero-copy h1 {
  font-size: clamp(2.2rem, 2.4vw + 1.6rem, 3rem);
  margin: 0 0 10px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  margin: 16px 0 10px;
}
.hero-meta {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 12px 0 0 0;
  padding: 0;
  color: var(--muted);
}
.hero-art {
  display: grid;
  place-items: center;
}

/* Strips & Cards */
.strip {
  background: var(--surface);
  padding: 28px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.strip-muted {
  background: transparent;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.cards.two {
  grid-template-columns: repeat(2, 1fr);
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 18px;
  border-radius: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
}
.person img {
  border-radius: 14px;
  margin-bottom: 12px;
}

/* Columns, Boxes, Lists */
.cols.two {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}
.box {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 18px;
  border-radius: 16px;
}
.list-plain {
  list-style: none;
  padding-left: 0;
  margin: 8px 0 0 0;
}
.list-plain li {
  margin: 6px 0;
}

/* Buttons */
.btn {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.btn:hover {
  box-shadow: 0 0 0 3px var(--ring);
  transform: translateY(-1px);
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #04101d;
  border: 0;
}
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
}
.btn-secondary {
  background: #1f2a3a;
  border-color: #1f2a3a;
}

/* Accessibility focus */
:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  will-change: transform, opacity;
}
.reveal.show {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  background: #0c1017;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 18px;
  padding: 28px 0;
}
.footer-base {
  border-top: 1px solid var(--border);
  margin-top: 12px;
}
.footer-base-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
}
.footer-logo .logo-mark {
  width: 28px;
  height: 28px;
}

.hidden {
  display: none;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .strip-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cards.three {
    grid-template-columns: 1fr 1fr;
  }
  .cols.two {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Tablet logo size */
  .logo-img {
    height: 100px;
  }
}

@media (max-width: 680px) {
  .strip-grid {
    grid-template-columns: 1fr;
  }
  .cards.two,
  .cards.three {
    grid-template-columns: 1fr;
  }
  .newsletter-form {
    flex-direction: column;
  }
  .nav-toggle {
    display: inline-block;
  }

  /* Animated mobile menu panel */
  .nav-menu {
    position: fixed;
    inset: 64px 14px auto 14px;
    background: #0e131b;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    display: block;
    flex-direction: column;
    gap: 6px;

    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: max-height 0.35s ease, opacity 0.25s ease, transform 0.35s ease;
  }
  .nav-menu.open {
    max-height: 60vh;
    opacity: 1;
    transform: none;
  }

  /* Mobile logo size */
  .logo-img {
    height: 60px;
  }
}

/* --- Professional Contact Form Styles --- */
.contact-form.pro {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 18px;
  border-radius: 16px;
}
.field {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}
.field label {
  font-size: 14px;
  color: var(--muted);
}
.field input,
.field select,
.field textarea {
  background: #0f141c;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.field textarea {
  resize: vertical;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  box-shadow: 0 0 0 3px var(--ring);
  border-color: var(--brand);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.row.align {
  align-items: center;
}

.check {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  color: var(--muted);
}
.check input {
  width: 18px;
  height: 18px;
}

.form-note {
  color: var(--muted);
}
.form-disclaimer {
  margin-top: 10px;
  font-size: 12px;
}
.badge {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #0f141c;
  color: var(--muted);
  font-size: 12px;
}
.quick-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Responsive adjustments for form */
@media (max-width: 680px) {
  .row {
    grid-template-columns: 1fr;
  }
}
/* ========== Professional Navigation ========== */
.site-header {
  background: #0b0e13;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

/* Hamburger */
.nav-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(230, 237, 246, 0.12);
  border-radius: 10px;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: #e6edf6;
  border-radius: 2px;
}
.nav-toggle:focus-visible {
  outline: 2px solid #6cc0ff;
  outline-offset: 2px;
}

/* Mobile dropdown panel (closed by default) */
.nav-menu {
  list-style: none;
  margin: 0;
  padding: 16px 18px;
  position: absolute;
  right: 16px;
  top: 72px;
  width: min(320px, calc(100vw - 32px));
  border: 1px solid rgba(230, 237, 246, 0.08);
  background: rgba(9, 13, 20, 0.98);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  display: none; /* toggled to block with .open */
}

/* When toggled */
.nav-menu.open {
  display: block;
}

/* Items + link styling */
.nav-menu li {
  margin: 10px 2px;
}

.nav-menu a {
  display: inline-block;
  text-decoration: none;
  color: #e6edf6;
  font-weight: 500;
  letter-spacing: 0.2px;
  line-height: 1.4;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

/* Hover/focus states */
.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: #ffd36e;
  border-bottom-color: #ffd36e;
  outline: none;
}

/* Current page state (optional: add aria-current="page" in HTML) */
.nav-menu a[aria-current="page"] {
  color: #ffffff;
  border-bottom-color: #6cc0ff;
}

/* Make the CTA look aligned in the menu */
.nav-menu .btn,
.nav-menu .cta {
  display: block;
  width: 100%;
  text-align: center;
  margin-top: 6px;
  border-radius: 10px;
  padding: 12px 14px;
}

/* Desktop layout */
@media (min-width: 960px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    display: flex !important;
    background: transparent;
    border: 0;
    box-shadow: none;
    padding: 0;
    width: auto;
    gap: 22px;
    align-items: center;
  }

  .nav-menu li {
    margin: 0;
  }

  .nav-menu .btn,
  .nav-menu .cta {
    width: auto;
    margin-top: 0;
    padding: 10px 16px;
  }
}

/* Keyboard-only outline for links */
.nav-menu a:focus-visible {
  outline: 2px solid #6cc0ff;
  outline-offset: 3px;
  border-bottom-color: transparent;
}
.lang-switch {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-left: auto; /* τα σπρώχνει δεξιά */
  padding-left: 12px;
}

.flag-icon {
  width: 28px;
  height: 20px;
  object-fit: cover;
  border: 1px solid #ccc;
  border-radius: 3px;
  transition: transform 0.2s;
  cursor: pointer;
}

.flag-icon:hover {
  transform: scale(1.1);
}
/* flags when used as a menu item */
.nav-menu .lang-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px; /* small spacing from the previous menu item */
}
.nav-menu .lang-switch a {
  display: inline-block;
}

/* your existing flag styles are fine */
.flag-icon {
  width: 28px;
  height: 20px;
  object-fit: cover;
  border: 1px solid #ccc;
  border-radius: 3px;
  transition: transform 0.2s;
  cursor: pointer;
}
.flag-icon:hover {
  transform: scale(1.1);
}