:root {
  --primary: #1f3a5f;
  --primary-dark: #132843;
  --secondary: #f4f6f8;
  --accent: #c59b5f;
  --text: #1f2933;
  --muted: #6b7280;
  --white: #ffffff;
  --border: #e5e7eb;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: 90%;
  max-width: 1180px;
  margin: 0 auto;
}

header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
}

.logo {
  font-size: 22px;
  font-weight: bold;
  color: var(--primary);
}

.menu-toggle,
.menu-close {
    display: none;
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  opacity: 0;
  visibility: hidden;
  transition: .3s;
  z-index: 9000;
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}


.main-nav {
  z-index: 99999;
}

.menu-close {
  z-index: 10000;
}

nav a {
  margin-left: 28px;
  font-size: 15px;
  text-transform: uppercase;
}

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

section {
  padding: 80px 0;
}

.grey {
  background: var(--secondary);
}

.hero {
  background: linear-gradient(135deg, #f8fafc 0%, #eef2f7 100%);
  padding: 90px 0;
}

.hero-grid,
.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

h1 {
  font-size: 46px;
  line-height: 1.15;
  color: var(--primary);
  margin-bottom: 24px;
}

h2 {
  font-size: 34px;
  color: var(--primary);
  margin-bottom: 16px;
  line-height: 1.25;
}

h3 {
  color: var(--primary);
  margin-bottom: 14px;
}

p {
  color: var(--muted);
  font-size: 17px;
  margin-bottom: 18px;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: bold;
  transition: 0.2s ease;
}

.btn:hover {
  background: var(--primary-dark);
}

.btn.outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn.outline:hover {
  background: var(--primary);
  color: var(--white);
}

.image-placeholder,
.map-placeholder {
  background: #d9dee7;
  border-radius: 14px;
  min-height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #687284;
  font-size: 16px;
  text-align: center;
  padding: 30px;
  box-shadow: 0 18px 40px rgba(31, 58, 95, 0.12);
}

.image-placeholder.tall {
  min-height: 520px;
}

.map-placeholder {
  min-height: 420px;
}

.hero-image {
  height: 460px;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(31,58,95,.12);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-image {
  height: 520px;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(31,58,95,.12);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.section-title {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.cards {
  display: grid;
  gap: 28px;
}

.cards.three {
  grid-template-columns: repeat(3, 1fr);
}

.cards.four {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 32px;
  border-radius: 10px;
}

.card.center {
  text-align: center;
}

.card span {
  display: inline-flex;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #eef2f7;
  color: var(--accent);
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-bottom: 18px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.process-grid div {
  border-left: 3px solid var(--accent);
  padding: 20px;
  background: var(--white);
  border-radius: 6px;
  color: var(--muted);
}

.process-grid strong {
  display: block;
  color: var(--primary);
  margin-bottom: 8px;
}

.contact-items {
  margin-top: 30px;
  display: grid;
  gap: 18px;
}

.contact-items div {
  background: var(--secondary);
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: 8px;
}

.contact-items strong {
  color: var(--primary);
  display: block;
  margin-bottom: 5px;
}

.contact-buttons {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

footer {
  background: #111827;
  color: #d1d5db;
  padding: 45px 0 20px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
}

footer h4 {
  color: var(--white);
  margin-bottom: 12px;
}

footer p,
footer a {
  color: #d1d5db;
  margin-bottom: 6px;
  display: block;
  font-size: 14px;
}

.copyright {
  border-top: 1px solid #374151;
  margin-top: 30px;
  padding-top: 20px;
  text-align: center;
  color: #9ca3af;
}

.demo-bar {
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--primary);
  color: var(--white);
  font-size: 14px;
}

.demo-bar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 10px 0;
  text-align: center;
}

.demo-bar span {
  line-height: 1.4;
}

.demo-bar a {
  background: var(--accent);
  color: var(--white);
  padding: 7px 16px;
  border-radius: 4px;
  font-weight: bold;
  white-space: nowrap;
}

.demo-bar a:hover {
  background: #a87f46;
}

/* Αν κρατήσεις και το header sticky */
header {
  top: 44px;
}

.demo-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: bold;
  margin-bottom: 18px;
}

@media (max-width: 900px) {
  .hero-grid,
  .about-grid,
  .contact-grid,
  .cards.three,
  .cards.four,
  .process-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 60px 0;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 28px;
  }

    header {
    z-index: 10000;
      top: 83px;
  }

  .header-inner {
    flex-direction: column;
    gap: 18px;
  }

 .menu-toggle{
        display:block;
        background:none;
        border:0;
        font-size:34px;
        cursor:pointer;
        color:var(--primary);
        padding:0;
    }

.main-nav{
       position: fixed;
    top: 105px;
    right: -100%;
    width: 260px;
    height: calc(100vh - 105px);
    background: #fff;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 70px 30px 30px;
    transition: right .3s ease;
    z-index: 11000;
    box-shadow: -10px 0 30px rgba(0,0,0,.15);
    }

    .main-nav.active{
        right:0;
    }

    .main-nav a{
        margin:0;
        font-size:18px;
    }

    .menu-close{
        display:block;

        position:absolute;
        top:15px;
        right:20px;

        background:none;
        border:none;

        font-size:34px;
        line-height:1;

        cursor:pointer;
         z-index: 12000;

        color:var(--primary);
    }


 .header-inner{
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

     .logo{
        display:block;
        font-size:22px;
    }

  nav {
    text-align: center;
  }

  nav a {
    margin: 0 8px;
    font-size: 13px;
  }

  .image-placeholder,
  .map-placeholder,
  .image-placeholder.tall {
    min-height: 320px;
  }

  .demo-bar-inner {
  flex-direction: column;
  gap: 8px;
}

}