/* ============================================================
   GIOULAKIS SPYROS — Smart Security & Network Solutions
   CSS Design System
   ============================================================ */

/* ── CSS Variables ── */
:root {
  /* Colors */
  --clr-dark:        #08111f;
  --clr-dark-2:      #0c1a2e;
  --clr-dark-3:      #102040;
  --clr-blue:        #1a6fc4;
  --clr-blue-light:  #2e8be8;
  --clr-blue-dim:    rgba(26, 111, 196, 0.15);
  --clr-blue-border: rgba(26, 111, 196, 0.3);
  --clr-white:       #ffffff;
  --clr-off-white:   #f0f5fb;
  --clr-text-muted:  #7a97bb;
  --clr-text-light:  #c8d9ee;
  --clr-surface:     #0e1e38;
  --clr-border:      rgba(255, 255, 255, 0.08);
  --clr-success:     #22c55e;
  --clr-gray-100:    #f0f4f9;
  --clr-gray-200:    #e2eaf4;
  --clr-text-dark:   #0f1e33;

  /* Spacing */
  --container:       1200px;
  --section-py:      5rem;
  --section-py-sm:   3rem;

  /* Radii */
  --radius-sm:       6px;
  --radius-md:       12px;
  --radius-lg:       20px;
  --radius-xl:       28px;

  /* Shadows */
  --shadow-card:     0 2px 20px rgba(8, 17, 31, 0.4);
  --shadow-blue:     0 8px 32px rgba(26, 111, 196, 0.3);
  --shadow-sm:       0 1px 8px rgba(8, 17, 31, 0.2);

  /* Transitions */
  --transition:      0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-sans:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--clr-text-dark);
  background: var(--clr-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, select, textarea {
  font-family: inherit;
}

/* ── Utility ── */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-blue);
  margin-bottom: 1rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-blue);
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--clr-text-dark);
}

.section-title--white {
  color: var(--clr-white);
}

.section-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #4a6380;
  max-width: 560px;
}

.section-desc--light {
  color: var(--clr-text-light);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--clr-blue);
  color: var(--clr-white);
  box-shadow: 0 4px 16px rgba(26, 111, 196, 0.35);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--clr-blue-light);
  box-shadow: 0 6px 24px rgba(26, 111, 196, 0.5);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--clr-white);
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--clr-white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-outline-blue {
  background: transparent;
  color: var(--clr-blue);
  border: 1.5px solid var(--clr-blue);
}

.btn-outline-blue:hover,
.btn-outline-blue:focus-visible {
  background: var(--clr-blue);
  color: var(--clr-white);
}

.btn-lg {
  padding: 0.9rem 2.25rem;
  font-size: 0.95rem;
}

.btn svg, .btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ── Focus styles (accessibility) ── */
:focus-visible {
  outline: 2px solid var(--clr-blue);
  outline-offset: 3px;
}

/* ────────────────────────────────────────
   NAVBAR
──────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  transition: background var(--transition), box-shadow var(--transition);
}

#navbar .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Transparent on top of hero */
#navbar.nav-transparent {
  background: transparent;
}

/* Solid when scrolled */
#navbar.nav-solid {
  background: var(--clr-dark);
  box-shadow: 0 1px 24px rgba(0,0,0,0.5);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 50px;
  width: 50px;
  object-fit: contain;
  border-radius: 8px;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: 0.02em;
}

.nav-logo-sub {
  font-size: 0.6rem;
  font-weight: 400;
  color: var(--clr-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.5rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text-light);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--clr-white);
  background: rgba(255, 255, 255, 0.07);
}

.nav-links .nav-cta {
  margin-left: 0.5rem;
  padding: 0.55rem 1.25rem;
  background: var(--clr-blue);
  color: var(--clr-white);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}

.nav-links .nav-cta:hover {
  background: var(--clr-blue-light);
  box-shadow: var(--shadow-blue);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.nav-hamburger:hover { background: rgba(255,255,255,0.07); }

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* Mobile menu open state */
.nav-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--clr-dark);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 5rem 2rem 3rem;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  display: block;
  width: 100%;
  max-width: 320px;
  padding: 1rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--clr-text-light);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition);
}

.nav-mobile a:hover {
  background: var(--clr-blue-dim);
  color: var(--clr-white);
}

.nav-mobile .nav-mobile-cta {
  background: var(--clr-blue);
  color: var(--clr-white);
  font-weight: 700;
  margin-top: 1rem;
}

.nav-mobile .nav-mobile-phone {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 1rem 1.5rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clr-white);
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-blue-border);
}

/* ────────────────────────────────────────
   HERO
──────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--clr-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  /* cover με right center: κρατάει το δεξί visual/logo εμφανές,
     τυχόν crop γίνεται από το αριστερό (σκοτεινό) τμήμα */
  background-image: url('../assets/hero-banner.png');
  background-size: cover;
  background-position: right center;
  /* Ken Burns: zoom + drift συνεχής loop */
  animation: hero-ken-burns 20s ease-in-out infinite alternate;
  transform-origin: center center;
}

@keyframes hero-ken-burns {
  0%   { transform: scale(1.0)  translate(0,    0);   }
  50%  { transform: scale(1.1)  translate(-3%,  -2%); }
  100% { transform: scale(1.15) translate(2%,  -1%);  }
}

.hero-overlay {
  /* σκοτεινή ζώνη ΑΡ μέχρι 44% → καλύπτει πλήρως το text column
     fade από 44% → 65% → logo δεξιά ορατό */
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(5, 12, 25, 0.97) 0%,
    rgba(5, 12, 25, 0.97) 44%,
    rgba(5, 12, 25, 0.65) 58%,
    rgba(5, 12, 25, 0.18) 75%,
    rgba(5, 12, 25, 0.02) 100%
  );
}

.hero-grid-lines {
  /* μειωμένο opacity — η background εικόνα έχει ήδη tech αισθητική */
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 111, 196, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 111, 196, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 88vh;
  padding-top: 72px;
  padding-bottom: 3rem;
  /* Γεμίζει από την αριστερή άκρη — override του centered container */
  max-width: 100%;
  margin-left: 0;
  margin-right: 0;
  padding-left: clamp(2rem, 5vw, 5rem);
  padding-right: 1.5rem;
}

.hero-content {
  width: auto;
  max-width: 520px;
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.85rem 0.3rem 0.5rem;
  background: rgba(26, 111, 196, 0.1);
  border: 1px solid rgba(26, 111, 196, 0.22);
  border-radius: 100px;
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #7ec4f8;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}

.hero-badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--clr-blue);
  flex-shrink: 0;
  animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(1.85rem, 3.2vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--clr-white);
  margin-bottom: 1.1rem;
}

.hero-title span {
  color: var(--clr-blue-light);
}

.hero-desc {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--clr-text-light);
  margin-bottom: 1.875rem;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 0.875rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ────────────────────────────────────────
   SERVICES
──────────────────────────────────────── */
#services {
  padding: var(--section-py) 0;
  background: var(--clr-gray-100);
}

.services-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.services-header .section-label {
  justify-content: center;
}

.services-header .section-label::before { display: none; }
.services-header .section-label::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-blue);
}

.services-header .section-desc {
  margin-inline: auto;
  text-align: center;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--clr-white);
  border-radius: var(--radius-md);
  padding: 2rem;
  border: 1px solid var(--clr-gray-200);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-blue), var(--clr-blue-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  border-color: var(--clr-blue-border);
  box-shadow: 0 8px 32px rgba(26, 111, 196, 0.12);
  transform: translateY(-3px);
}

.service-card:hover::before { opacity: 1; }

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--clr-blue-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.service-icon svg {
  width: 26px;
  height: 26px;
  color: var(--clr-blue);
  stroke: var(--clr-blue);
}

.service-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text-dark);
  line-height: 1.3;
}

.service-desc {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #5a7094;
  flex: 1;
}

.service-img {
  margin-top: auto;
  border-radius: var(--radius-sm);
  overflow: hidden;
  height: 160px;
  display: none; /* hidden - cards without images */
}

/* ────────────────────────────────────────
   ABOUT
──────────────────────────────────────── */
#about {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-images {
  position: relative;
}

.about-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: 0 20px 60px rgba(8,17,31,0.15);
}

.about-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-img-secondary {
  position: absolute;
  bottom: -2rem;
  right: -2rem;
  width: 48%;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 1;
  box-shadow: 0 12px 40px rgba(8,17,31,0.2);
  border: 4px solid var(--clr-white);
}

.about-img-secondary img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-badge {
  position: absolute;
  top: 1.5rem;
  left: -1.5rem;
  background: var(--clr-blue);
  color: var(--clr-white);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
  box-shadow: var(--shadow-blue);
  z-index: 2;
}

.about-content {
  max-width: 520px;
}

.about-content .section-title {
  margin-bottom: 1.5rem;
}

.about-content .section-desc {
  margin-bottom: 1.25rem;
  max-width: none;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 2rem 0;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.about-feature-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--clr-blue-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.about-feature-icon svg {
  width: 12px;
  height: 12px;
  stroke: var(--clr-blue);
}

.about-feature-text {
  font-size: 0.95rem;
  color: #3d5a7a;
  line-height: 1.5;
}

/* ────────────────────────────────────────
   GALLERY / INSTALLATIONS
──────────────────────────────────────── */
#gallery {
  padding: var(--section-py) 0;
  background: var(--clr-dark);
}

.gallery-header {
  text-align: center;
  margin-bottom: 3rem;
}

.gallery-header .section-label { justify-content: center; }
.gallery-header .section-label::before { background: var(--clr-blue); }
.gallery-header .section-title { color: var(--clr-white); }
.gallery-header .section-desc {
  color: var(--clr-text-muted);
  margin-inline: auto;
  text-align: center;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  gap: 1rem;
}

.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  background: var(--clr-surface);
}

.gallery-item.span-2 { grid-column: span 2; }
.gallery-item.span-row { grid-row: span 2; }

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8,17,31,0.7) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}

.gallery-item-overlay span {
  color: var(--clr-white);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.gallery-item:hover img { transform: scale(1.06); }
.gallery-item:hover .gallery-item-overlay { opacity: 1; }

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

.lightbox-inner {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  color: var(--clr-white);
  font-size: 1.5rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: background var(--transition);
}

.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ────────────────────────────────────────
   CTA SECTION
──────────────────────────────────────── */
#cta {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--clr-blue) 0%, #1055a0 100%);
  position: relative;
  overflow: hidden;
}

#cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-inner .section-label {
  justify-content: center;
  color: rgba(255,255,255,0.7);
}

.cta-inner .section-label::before { background: rgba(255,255,255,0.5); }

.cta-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.cta-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  max-width: 540px;
  margin-inline: auto;
  margin-bottom: 2.25rem;
  line-height: 1.65;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-actions .btn-white {
  background: var(--clr-white);
  color: var(--clr-blue);
  font-weight: 700;
}

.cta-actions .btn-white:hover {
  background: #e8f0fb;
  transform: translateY(-1px);
}

.cta-phone-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.cta-phone-link:hover { color: var(--clr-white); }

/* ────────────────────────────────────────
   QUOTE FORM
──────────────────────────────────────── */
#quote {
  padding: var(--section-py) 0;
  background: var(--clr-gray-100);
}

.quote-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}

.quote-info .section-title { margin-bottom: 1.25rem; }

.quote-info .section-desc {
  margin-bottom: 2rem;
}

.quote-contacts {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.quote-contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--clr-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-gray-200);
  text-decoration: none;
  color: var(--clr-text-dark);
  transition: all var(--transition);
}

.quote-contact-item:hover {
  border-color: var(--clr-blue-border);
  box-shadow: 0 4px 16px rgba(26,111,196,0.1);
}

.quote-contact-icon {
  width: 44px;
  height: 44px;
  background: var(--clr-blue-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.quote-contact-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--clr-blue);
}

.quote-contact-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-text-muted);
  font-weight: 600;
}

.quote-contact-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-text-dark);
}

/* Form */
.quote-form-wrap {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: 0 8px 40px rgba(8,17,31,0.08);
  border: 1px solid var(--clr-gray-200);
}

.form-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-text-dark);
  margin-bottom: 1.75rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: #3d5a7a;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--clr-gray-200);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--clr-text-dark);
  background: var(--clr-white);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--clr-blue);
  box-shadow: 0 0 0 3px rgba(26,111,196,0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234a6380' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2.5rem;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.form-checkbox input {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--clr-blue);
  cursor: pointer;
}

.form-checkbox label {
  font-size: 0.82rem;
  color: #5a7094;
  line-height: 1.5;
  cursor: pointer;
}

.form-note {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  margin-top: 0.75rem;
  line-height: 1.5;
}

.btn-submit {
  width: 100%;
  padding: 0.9rem;
  background: var(--clr-blue);
  color: var(--clr-white);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(26,111,196,0.3);
}

.btn-submit:hover {
  background: var(--clr-blue-light);
  box-shadow: var(--shadow-blue);
  transform: translateY(-1px);
}

/* ────────────────────────────────────────
   CONTACT
──────────────────────────────────────── */
#contact {
  padding: var(--section-py) 0;
  background: var(--clr-dark-2);
}

.contact-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.contact-header .section-label { justify-content: center; color: rgba(100,160,220,0.9); }
.contact-header .section-label::before { background: rgba(100,160,220,0.5); }

.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.contact-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--clr-blue-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  text-align: center;
  text-decoration: none;
  color: var(--clr-white);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.contact-card:hover {
  background: rgba(26,111,196,0.12);
  border-color: var(--clr-blue);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26,111,196,0.2);
}

.contact-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--clr-blue-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.contact-card:hover .contact-card-icon { background: rgba(26,111,196,0.3); }

.contact-card-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--clr-blue-light);
}

.contact-card-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-muted);
  font-weight: 600;
}

.contact-card-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-white);
  line-height: 1.3;
}

.contact-card-action {
  font-size: 0.8rem;
  color: var(--clr-blue-light);
  font-weight: 500;
}

/* ────────────────────────────────────────
   FOOTER
──────────────────────────────────────── */
footer {
  background: var(--clr-dark);
  border-top: 1px solid var(--clr-border);
  padding: 3.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
  margin-bottom: 1rem;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.65;
  max-width: 280px;
  margin-bottom: 1.5rem;
}

.footer-contact-mini {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-contact-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--clr-text-muted);
  font-size: 0.875rem;
  transition: color var(--transition);
  text-decoration: none;
}

.footer-contact-link:hover { color: var(--clr-white); }

.footer-contact-link svg {
  width: 15px;
  height: 15px;
  stroke: var(--clr-blue);
  flex-shrink: 0;
}

.footer-col-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-muted);
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--clr-white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.75rem;
  border-top: 1px solid var(--clr-border);
}

.footer-copy {
  font-size: 0.8rem;
  color: #3d5a7a;
}

.footer-tagline {
  font-size: 0.8rem;
  color: #3d5a7a;
}

/* ────────────────────────────────────────
   SCROLL ANIMATIONS
──────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children */
.stagger-children .fade-in:nth-child(1) { transition-delay: 0.05s; }
.stagger-children .fade-in:nth-child(2) { transition-delay: 0.12s; }
.stagger-children .fade-in:nth-child(3) { transition-delay: 0.19s; }
.stagger-children .fade-in:nth-child(4) { transition-delay: 0.26s; }
.stagger-children .fade-in:nth-child(5) { transition-delay: 0.33s; }
.stagger-children .fade-in:nth-child(6) { transition-delay: 0.40s; }

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in, .fade-in-left, .fade-in-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
  .hero-bg { transition: none; animation: none; }
}

/* ────────────────────────────────────────
   RESPONSIVE — TABLET (≤ 1024px)
──────────────────────────────────────── */
@media (max-width: 1024px) {
  :root { --section-py: 4rem; }

  /* Hero tablet: αριστερή column, background shift για να φαίνεται το logo */
  .hero-inner {
    padding-left: clamp(1.5rem, 3vw, 3rem);
  }

  .hero-content {
    width: auto;
    max-width: 440px;
  }

  .hero-bg {
    background-position: 72% center;
  }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-images {
    max-width: 520px;
    margin-inline: auto;
  }

  .about-content { max-width: 100%; }

  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .gallery-item.span-2 { grid-column: span 1; }

  .quote-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

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

/* ────────────────────────────────────────
   RESPONSIVE — MOBILE (≤ 768px)
──────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --section-py: 3rem; }

  /* Nav */
  .nav-links     { display: none; }
  .nav-hamburger { display: flex; }

  /* Hero mobile: full-width content, βαρύτερο overlay, shifted position */
  #hero,
  .hero-inner    { min-height: 90vh; }

  .hero-inner {
    padding-top: 72px;
    padding-bottom: 2.5rem;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .hero-content {
    width: 100%;
    max-width: 100%;
  }

  .hero-bg {
    background-position: 68% center;
  }

  .hero-overlay {
    background: linear-gradient(
      90deg,
      rgba(5, 12, 25, 0.97) 0%,
      rgba(5, 12, 25, 0.93) 55%,
      rgba(5, 12, 25, 0.78) 100%
    );
  }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }

  /* Gallery */
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 180px;
  }
  .gallery-item.span-row { grid-row: span 1; }

  /* CTA */
  .cta-actions { flex-direction: column; align-items: center; }

  /* Quote form */
  .form-row { grid-template-columns: 1fr; }

  /* Contact */
  .contact-cards { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}

/* ────────────────────────────────────────
   RESPONSIVE — SMALL MOBILE (≤ 390px)
──────────────────────────────────────── */
@media (max-width: 390px) {
  .hero-title { font-size: clamp(1.85rem, 8vw, 2.2rem); }
  .hero-desc  { font-size: 0.93rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .gallery-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 200px;
  }
}