:root {
  --blue: #1776d2;
  --blue-dark: #0c559f;
  --blue-deep: #073c70;
  --sky: #eaf5ff;
  --white: #ffffff;
  --text: #12304d;
  --muted: #5d738a;
  --line: #dce8f4;
  --shadow: 0 16px 42px rgba(7, 60, 112, 0.14);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.55;
}

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

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

.container {
  width: min(1180px, calc(100% - 34px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(23, 118, 210, 0.14);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand-mark {
  width: 54px;
  height: 42px;
  object-fit: contain;
}

.brand-text {
  display: grid;
  line-height: 1.05;
}

.brand-name {
  font-family: Georgia, "Times New Roman", serif;
  color: var(--blue-deep);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: .04em;
}

.brand-subtitle {
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
}

.main-nav {
  margin-left: auto;
  display: flex;
  gap: 24px;
  font-size: 14px;
  font-weight: 750;
  color: #294c70;
}

.main-nav a {
  padding: 28px 0 24px;
  border-bottom: 3px solid transparent;
}

.main-nav a:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.top-cta {
  background: var(--blue);
  color: white;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 850;
  box-shadow: 0 12px 26px rgba(23, 118, 210, .25);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 0;
  width: 42px;
}

.nav-toggle span {
  display: block;
  height: 3px;
  margin: 6px 0;
  background: var(--blue-deep);
  border-radius: 999px;
}

.hero {
  background:
    radial-gradient(circle at 85% 20%, rgba(255,255,255,.16), transparent 26%),
    linear-gradient(135deg, var(--blue-deep), var(--blue));
  color: white;
  padding: 56px 0 62px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 34px;
  align-items: center;
}

.eyebrow,
.section-label {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: .17em;
  font-size: 12px;
  font-weight: 900;
}

.eyebrow { color: #cfe9ff; }

.section-label { color: var(--blue); }

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin: 14px 0 18px;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

h2 {
  margin: 10px 0 15px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-copy p {
  max-width: 660px;
  color: #e5f3ff;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 900;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}

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

.btn-outline {
  color: white;
  border-color: rgba(255,255,255,.45);
  background: rgba(255,255,255,.08);
}

.hero-photo {
  overflow: hidden;
  border-radius: 26px;
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: var(--shadow);
}

.hero-photo img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.stats-section {
  margin-top: -24px;
  position: relative;
  z-index: 4;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: linear-gradient(135deg, var(--blue), #39a2ff);
  color: white;
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.stats-grid article {
  padding: 20px;
  border-right: 1px solid rgba(255,255,255,.25);
}

.stats-grid article:last-child { border-right: 0; }

.stat-number {
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.stat-number strong {
  font-size: 42px;
  line-height: 1;
}

.stat-number span {
  font-size: 28px;
  font-weight: 950;
}

.stats-grid h3 {
  margin: 6px 0 2px;
  font-size: 18px;
}

.stats-grid p {
  margin: 0;
  color: #dcedff;
  font-size: 14px;
}

.section {
  padding: 60px 0;
}

.company-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 42px;
  align-items: center;
}

.section-copy p,
.section-head p,
.technical-copy p,
.gas-card p {
  color: var(--muted);
  font-size: 17px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.steps article,
.service-card,
.project-card,
.form-card,
.contact-info {
  border: 1px solid var(--line);
  background: white;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.steps article {
  padding: 20px;
}

.steps span {
  color: var(--blue);
  font-weight: 950;
}

.steps h3 {
  margin: 8px 0 6px;
}

.steps p { margin: 0; color: var(--muted); }

.services-section,
.contact-section {
  background: linear-gradient(180deg, #f8fbff, #eef7ff);
}

.section-head {
  max-width: 780px;
  margin: 0 auto 26px;
  text-align: center;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.service-card {
  padding: 22px;
  min-height: 230px;
}

.service-card h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

.service-card p { margin: 0; color: var(--muted); }

.technical-section {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
  color: white;
}

.technical-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  border-radius: 26px;
  background: rgba(255,255,255,.08);
  box-shadow: var(--shadow);
}

.technical-image img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
}

.technical-copy {
  padding: 38px 40px;
}

.technical-copy p {
  color: #e5f4ff;
}

.technical-tags {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.technical-tags span {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255,255,255,.12);
  color: #fff;
  font-weight: 850;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.project-card {
  overflow: hidden;
}

.project-card img {
  width: 100%;
  height: 178px;
  object-fit: cover;
}

.project-card div {
  padding: 15px 16px 17px;
}

.project-card h3 {
  margin: 0 0 6px;
  font-size: 19px;
  line-height: 1.2;
}

.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.gas-section {
  padding: 42px 0;
  background: linear-gradient(180deg, #f8fbff, #edf7ff);
}

.gas-card {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 30px;
  align-items: center;
  background: white;
  border: 1px solid var(--line);
  border-left: 6px solid var(--blue);
  border-radius: 20px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.gas-card h2,
.gas-card p { margin-bottom: 0; }

.why-section {
  padding: 42px 0;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.why-grid article {
  border-top: 4px solid var(--blue);
  border-radius: 16px;
  background: #f8fbff;
  padding: 18px;
}

.why-grid h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.why-grid p { margin: 0; color: var(--muted); }

.contact-section {
  padding: 56px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.05fr .95fr;
  gap: 16px;
  align-items: stretch;
}

.contact-info,
.form-card {
  padding: 24px;
}

.contact-info ul {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}

.contact-info li {
  padding: 5px 0;
}

.contact-info a {
  color: var(--blue-dark);
  font-weight: 800;
}

.form-card h3 {
  margin: 0 0 12px;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 13px 14px;
  font: inherit;
  color: var(--text);
}

.contact-form textarea {
  grid-column: 1 / -1;
  min-height: 112px;
  resize: vertical;
}

.contact-form button {
  grid-column: 1 / -1;
  border: 0;
}

.honeypot {
  position: absolute !important;
  left: -9999px !important;
  opacity: 0 !important;
}

#form-message {
  margin-bottom: 10px;
}

#form-message .success,
#form-message .error {
  padding: 10px 12px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 14px;
}

#form-message .success {
  background: #e8f8ee;
  color: #156d37;
  border: 1px solid #bee0c8;
}

#form-message .error {
  background: #fff0f0;
  color: #a62929;
  border: 1px solid #f1bcbc;
}

.map {
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
  background: white;
  min-height: 390px;
}

.map iframe {
  width: 100%;
  height: 100%;
  min-height: 390px;
  border: 0;
  display: block;
}

.site-footer {
  padding: 20px 0;
  background: #eef7ff;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-brand {
  min-width: unset;
}

.site-footer p,
.site-footer small {
  margin: 0;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .65s ease, transform .65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: .07s; }
.delay-2 { transition-delay: .14s; }
.delay-3 { transition-delay: .21s; }

@media (max-width: 1100px) {
  .top-cta { display: none; }
  .service-grid,
  .why-grid,
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-grid,
  .company-grid,
  .technical-card,
  .gas-card,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .header-inner { min-height: 76px; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 12px 18px;
    background: white;
    border-bottom: 1px solid var(--line);
    margin-left: 0;
  }
  .main-nav.is-open { display: flex; }
  .main-nav a {
    padding: 14px 0;
    border-bottom: 0;
  }
  .brand-name { font-size: 24px; }
  .brand-subtitle { font-size: 12px; }
  .brand-mark { width: 48px; }
  .stats-grid,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .container { width: min(100% - 22px, 1180px); }
  .hero { padding: 42px 0 54px; }
  .hero-photo img { height: 340px; }
  .stats-grid,
  .steps,
  .service-grid,
  .project-grid,
  .why-grid,
  .technical-tags,
  .contact-form {
    grid-template-columns: 1fr;
  }
  .stats-grid article {
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,.25);
  }
  .stats-grid article:last-child { border-bottom: 0; }
  .brand { min-width: 0; }
  .brand-name { font-size: 21px; }
  .brand-subtitle { display: none; }
}


/* Προσθήκη: εργασίες που αναλαμβάνουμε με φωτογραφίες */
.system-examples {
  margin-top: 28px;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 16px;
}

.system-card {
  overflow: hidden;
  border: 1px solid var(--line);
  background: white;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.system-card img {
  width: 100%;
  height: 158px;
  object-fit: cover;
}

.system-card div {
  padding: 15px 16px 17px;
}

.system-card h3 {
  margin: 0 0 7px;
  font-size: 17px;
  line-height: 1.2;
}

.system-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* Αντικατάσταση έργων με λίστα συνεργασιών */
.collaboration-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 34px;
  margin-top: 10px;
}

.collaboration-column h3 {
  color: #7f8791;
  text-transform: uppercase;
  font-size: 22px;
  line-height: 1.1;
  margin: 0 0 22px;
  position: relative;
}

.collaboration-column h3::after {
  content: "";
  display: block;
  width: 52px;
  height: 2px;
  background: var(--text);
  margin-top: 12px;
}

.collaboration-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.collaboration-column li {
  color: #5b626b;
  font-size: 20px;
  line-height: 1.45;
  margin: 0 0 6px;
}

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

  .collaboration-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .collaboration-column li {
    font-size: 18px;
  }
}

/* Mobile polish: κρατάει το ίδιο design αλλά προσαρμόζει σωστά τη διάταξη σε κινητά */
@media (max-width: 760px) {
  body {
    overflow-x: hidden;
  }

  .container {
    width: min(100% - 24px, 1180px);
  }

  .site-header {
    position: sticky;
  }

  .header-inner {
    min-height: 70px;
    gap: 10px;
  }

  .brand {
    min-width: 0;
    gap: 9px;
  }

  .brand-mark {
    width: 42px;
    height: 34px;
    flex: 0 0 auto;
  }

  .brand-name {
    font-size: 21px;
    letter-spacing: .03em;
  }

  .brand-subtitle {
    font-size: 11px;
  }

  .nav-toggle {
    display: block;
    margin-left: auto;
    padding: 6px;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    z-index: 99;
    flex-direction: column;
    gap: 0;
    padding: 10px 18px 14px;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 34px rgba(7, 60, 112, .12);
    margin-left: 0;
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 13px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }

  .main-nav a:last-child {
    border-bottom: 0;
  }

  .top-cta {
    display: none;
  }

  .hero {
    padding: 34px 0 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  h1 {
    font-size: clamp(34px, 10vw, 44px);
    line-height: 1.04;
    letter-spacing: -0.045em;
  }

  h2 {
    font-size: clamp(27px, 8vw, 36px);
  }

  .hero-copy p {
    font-size: 16px;
  }

  .hero-actions {
    gap: 10px;
  }

  .btn {
    width: 100%;
    min-height: 48px;
  }

  .hero-photo {
    border-radius: 20px;
  }

  .hero-photo img {
    height: 330px;
    object-position: center;
  }

  .stats-section {
    margin-top: -18px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    border-radius: 14px;
  }

  .stats-grid article {
    padding: 16px;
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,.25);
  }

  .stat-number strong {
    font-size: 32px;
  }

  .stat-number span {
    font-size: 23px;
  }

  .stats-grid h3 {
    font-size: 15px;
  }

  .stats-grid p {
    font-size: 12px;
  }

  .section {
    padding: 46px 0;
  }

  .company-grid,
  .technical-card,
  .gas-card,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }

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

  .service-grid,
  .why-grid,
  .project-grid,
  .system-grid,
  .collaboration-grid {
    grid-template-columns: 1fr !important;
    gap: 14px;
  }

  .service-card {
    min-height: auto;
    padding: 20px;
  }

  .system-card img,
  .project-card img {
    height: 230px;
  }

  .system-card h3,
  .project-card h3 {
    font-size: 20px;
  }

  .technical-card {
    border-radius: 20px;
  }

  .technical-image img {
    min-height: 310px;
    height: 310px;
    object-position: center;
  }

  .technical-copy {
    padding: 26px 20px;
  }

  .technical-tags {
    grid-template-columns: 1fr;
  }

  .collaboration-grid {
    margin-top: 0;
  }

  .collaboration-column {
    padding-bottom: 8px;
  }

  .collaboration-column h3 {
    font-size: 20px;
    margin-bottom: 14px;
  }

  .collaboration-column li {
    font-size: 17px;
    line-height: 1.4;
  }

  .contact-info,
  .form-card {
    padding: 20px;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }

  .map,
  .map iframe {
    min-height: 300px;
  }

  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 430px) {
  .brand-subtitle {
    display: none;
  }

  .hero-photo img {
    height: 285px;
  }

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

  .system-card img,
  .project-card img {
    height: 205px;
  }

  .technical-image img {
    height: 280px;
    min-height: 280px;
  }

  .collaboration-column li {
    font-size: 16px;
  }
}
/* Language switcher */
.language-switch{display:inline-flex;align-items:center;gap:6px;padding:4px;border:1px solid var(--line);border-radius:999px;background:#fff}.language-switch a{display:inline-flex;align-items:center;gap:5px;padding:7px 10px;border-radius:999px;color:var(--blue-deep);font-size:13px;font-weight:900;line-height:1}.language-switch a.is-active{background:var(--blue);color:#fff}.footer-language-switch{display:inline-flex;gap:10px;flex-wrap:wrap}.footer-language-switch a{color:var(--blue-dark);font-weight:850}.footer-language-switch a.is-active{color:var(--blue-deep);text-decoration:underline;text-underline-offset:4px}@media(max-width:1100px){.language-switch{margin-left:auto}}@media(max-width:760px){.language-switch{order:3;margin-left:0}.header-inner{flex-wrap:wrap;padding:8px 0}.main-nav{top:92px}}@media(max-width:430px){.language-switch a{padding:7px 9px;font-size:12px}}

/* Language and direct email fixes */
.language-switch .flag,
.footer-language-switch .flag {
  font-size: 16px;
  line-height: 1;
}

.language-switch a {
  white-space: nowrap;
}

.direct-contact-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 18px;
}

.btn-outline-light {
  background: #ffffff;
  border-color: var(--blue);
  color: var(--blue-dark);
}

.form-card p {
  color: var(--muted);
}

/* Final language flag fix */
.language-switch .flag,
.footer-language-switch .flag {
  display: inline-block;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
  font-size: 18px;
  line-height: 1;
  margin-right: 5px;
}

.language-switch a,
.footer-language-switch a {
  align-items: center;
}