/* =========================================================
   Πολιτικός Μηχανικός — Modern responsive stylesheet
   ========================================================= */

:root {
  --navy: #0f2740;
  --navy-700: #163b5e;
  --navy-deep: #0a1b2e;
  --teal: #16a394;
  --teal-dark: #0f8074;
  --accent: #f5a623;
  --ink: #1c2733;
  --muted: #5b6b7b;
  --line: #e4e9ee;
  --bg: #ffffff;
  --bg-alt: #f5f8fb;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 18px 40px -22px rgba(15, 39, 64, 0.45);
  --shadow-sm: 0 8px 24px -16px rgba(15, 39, 64, 0.4);
  --container: 1160px;
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Manrope", "Segoe UI", Tahoma, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; color: var(--navy); font-weight: 800; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }
a { color: var(--teal-dark); text-decoration: none; }

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

.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--teal-dark);
  margin-bottom: 0.6rem;
}

.accent { color: var(--teal); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--teal); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--teal-dark); }
.btn-outline { border-color: var(--navy); color: var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-light { background: #fff; color: var(--navy); }
.btn-light:hover { background: #eef3f8; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 76px;
}
.brand { display: flex; align-items: center; gap: 0.7rem; color: var(--navy); }
.brand-mark {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: var(--navy);
  color: #fff;
  font-weight: 800;
  border-radius: 12px;
  letter-spacing: 0.04em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 1.02rem; color: var(--navy); }
.brand-text small { color: var(--muted); font-size: 0.74rem; letter-spacing: 0.05em; }

.main-nav { display: flex; align-items: center; gap: 0.4rem; margin-left: auto; }
.main-nav a {
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  color: var(--navy);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition), background var(--transition);
}
.main-nav a:hover { color: var(--teal-dark); }
.main-nav a.active { color: var(--teal-dark); }
.nav-cta { color: #fff !important; margin-left: 0.5rem; }

/* Language toggle */
.lang-toggle {
  margin-left: 0.85rem;
  padding: 0.45rem 0.9rem;
  border: 1.5px solid var(--line);
  background: #fff;
  color: var(--navy);
  font: 700 0.85rem "Manrope", sans-serif;
  letter-spacing: 0.04em;
  border-radius: 50px;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.lang-toggle:hover { border-color: var(--teal); color: var(--teal-dark); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px; height: 44px;
  border: none; background: transparent; cursor: pointer;
  padding: 10px;
}
.nav-toggle span {
  height: 2px; width: 100%;
  background: var(--navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(120% 120% at 80% 0%, #163b5e 0%, var(--navy) 45%, var(--navy-deep) 100%);
  color: #fff;
  padding: clamp(3rem, 7vw, 6rem) 0;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}
.hero h1 { color: #fff; }
.hero .lead { color: #cdd8e4; font-size: 1.15rem; max-width: 34ch; }
.hero .eyebrow { color: #6fd6c9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.6rem 0 2.4rem; }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.2rem;
  list-style: none;
  margin: 0; padding: 1.6rem 0 0;
  border-top: 1px solid rgba(255,255,255,0.14);
}
.hero-stats strong { display: block; font-size: 1.9rem; color: #fff; }
.hero-stats span { color: #9fb3c8; font-size: 0.86rem; }

.hero-visual { display: grid; place-items: center; }
.hero-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 340px;
  text-align: center;
  box-shadow: var(--shadow);
}
.hero-card p { color: #cdd8e4; margin: 1.2rem 0 0; font-weight: 600; }
.energy-scale { display: flex; flex-direction: column; gap: 0.5rem; }
.energy-scale span {
  color: #fff;
  font-weight: 800;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  text-align: left;
  position: relative;
}
.energy-scale .a-plus { background: #1f9d57; width: 60%; }
.energy-scale .a { background: #54b948; width: 70%; }
.energy-scale .b { background: #a9cf38; width: 80%; color: #1c2733; }
.energy-scale .c { background: #f6c244; width: 90%; color: #1c2733; }
.energy-scale .d { background: #ef8a3c; width: 100%; }

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 7vw, 6rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 640px; margin: 0 auto 3rem; text-align: center; }
.section-head p { color: var(--muted); font-size: 1.08rem; }

/* ---------- Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.service-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: transparent;
}
.card-icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  font-size: 1.6rem;
  background: var(--bg-alt);
  border-radius: 14px;
  margin-bottom: 1.1rem;
}
.service-card p { color: var(--muted); }
.card-link { font-weight: 700; font-size: 0.92rem; }

/* ---------- Why us ---------- */
.why-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}
.why-content p { color: var(--muted); font-size: 1.08rem; }
.check-list { list-style: none; padding: 0; margin: 1.4rem 0 2rem; display: grid; gap: 0.8rem; }
.check-list li { position: relative; padding-left: 2rem; color: var(--ink); }
.check-list li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  width: 1.4rem; height: 1.4rem;
  display: grid; place-items: center;
  background: var(--teal);
  color: #fff;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 800;
}
.why-highlight { display: grid; place-items: center; }
.highlight-box {
  background: linear-gradient(160deg, var(--teal) 0%, var(--teal-dark) 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 3rem 2.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.highlight-box strong { display: block; font-size: 3.2rem; line-height: 1; }
.highlight-box span { font-size: 1rem; opacity: 0.9; }

/* ---------- Process ---------- */
.process {
  list-style: none;
  padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  counter-reset: step;
}
.process li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.6rem;
  position: relative;
}
.step-num {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  background: var(--navy);
  color: #fff;
  font-weight: 800;
  border-radius: 12px;
  margin-bottom: 1rem;
}
.process p { color: var(--muted); margin: 0; }

/* ---------- Testimonials ---------- */
.testimonial {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  margin: 0;
}
.stars { color: var(--accent); font-size: 1.1rem; letter-spacing: 0.1em; margin-bottom: 0.8rem; }
.testimonial p { color: var(--ink); font-style: italic; }
.testimonial cite { color: var(--muted); font-style: normal; font-weight: 700; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  padding: clamp(2.5rem, 5vw, 4rem) 0;
}
.cta-inner h2 { color: #fff; margin-bottom: 0.3rem; }
.cta-inner p { color: #c7d3e0; margin: 0; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
  padding: clamp(2.8rem, 6vw, 4.5rem) 0;
  text-align: center;
}
.page-hero h1 { color: #fff; }
.page-hero p { color: #c7d3e0; max-width: 60ch; margin-inline: auto; }
.breadcrumb { color: #8ea4ba; font-size: 0.88rem; margin-bottom: 0.8rem; }
.breadcrumb a { color: #8ea4ba; }

/* ---------- Content / article ---------- */
.content-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: start;
}
.prose p { color: var(--muted); font-size: 1.05rem; }
.prose h2 { margin-top: 2rem; }
.prose ul { color: var(--muted); padding-left: 1.2rem; }
.prose ul li { margin-bottom: 0.5rem; }
.sidebar-card {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  position: sticky;
  top: 100px;
}
.sidebar-card h3 { margin-bottom: 1rem; }
.sidebar-card .btn { width: 100%; margin-top: 0.5rem; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.about-photo {
  background: linear-gradient(160deg, #163b5e, var(--navy-deep));
  border-radius: var(--radius);
  min-height: 360px;
  display: grid;
  place-items: center;
  color: #6fd6c9;
  font-size: 5rem;
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.value-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1.6rem;
}
.value-item strong { display: block; color: var(--navy); margin-bottom: 0.3rem; }
.value-item p { color: var(--muted); margin: 0; font-size: 0.96rem; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
.info-list { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 1.2rem; }
.info-list li { display: flex; gap: 1rem; align-items: flex-start; }
.info-list .ico {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: var(--bg-alt);
  border-radius: 12px;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.info-list strong { display: block; color: var(--navy); }
.info-list span, .info-list a { color: var(--muted); }

.form { display: grid; gap: 1rem; }
.form-row { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; }
.field { display: grid; gap: 0.4rem; }
.field label { font-weight: 600; font-size: 0.9rem; color: var(--navy); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(22, 163, 148, 0.15);
}
.field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 0.85rem; color: var(--muted); }
.form-success {
  display: none;
  background: #e7f7f3;
  border: 1px solid var(--teal);
  color: var(--teal-dark);
  padding: 1rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.form-success.show { display: block; }

.map-embed {
  border: 0;
  width: 100%;
  height: 320px;
  border-radius: var(--radius);
  margin-top: 2.5rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-deep);
  color: #c7d3e0;
  padding: 3.5rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
}
.footer-grid h4 { color: #fff; font-size: 1rem; margin: 0 0 1rem; }
.footer-brand strong { color: #fff; font-size: 1.1rem; }
.footer-brand p { font-size: 0.92rem; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.footer-links a { color: #c7d3e0; font-size: 0.95rem; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: #8ea4ba;
}

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .hero-grid, .why-grid, .about-grid, .contact-grid, .content-grid {
    grid-template-columns: 1fr;
  }
  .hero-visual { order: -1; }
  .sidebar-card { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .lang-toggle { margin-left: auto; margin-right: 0.5rem; }
  .main-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 1rem 1.25rem 1.5rem;
    gap: 0.2rem;
    transform: translateY(-120%);
    transition: transform var(--transition);
    box-shadow: var(--shadow);
  }
  .main-nav.open { transform: translateY(0); }
  .nav-cta { margin: 0.6rem 0 0; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.4rem; }
}