/* Glass Makine — Kurumsal site */
:root {
  --bg-dark: #0c1424;
  --bg-card: #121d32;
  --bg-elevated: #1a2842;
  --text: #e8edf5;
  --text-muted: #94a3b8;
  --accent: #4da8e8;
  --accent-dim: #2d6fa8;
  --accent-glow: rgba(77, 168, 232, 0.25);
  --border: rgba(148, 163, 184, 0.12);
  --glass: rgba(255, 255, 255, 0.04);
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --header-h: 76px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-dark);
  overflow-x: hidden;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #7ec4f5;
}

.container {
  width: min(1140px, 92vw);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(12, 20, 36, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.site-header.scrolled {
  background: rgba(12, 20, 36, 0.96);
}

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

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-main a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-toggle {
  display: flex;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.lang-toggle button {
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.lang-toggle button.active {
  background: var(--accent-dim);
  color: #fff;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    var(--bg-dark) 0%,
    rgba(12, 20, 36, 0.75) 45%,
    rgba(12, 20, 36, 0.5) 100%
  );
}

.hero-pattern {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image: radial-gradient(
      circle at 20% 80%,
      var(--accent-glow) 0%,
      transparent 45%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(45, 111, 168, 0.15) 0%,
      transparent 40%
    );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 4rem 0 6rem;
  max-width: 680px;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  margin-bottom: 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 100px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 540px;
}

/* Sections */
section {
  padding: 5.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--text-muted);
}

.section-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* About block */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}

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

.about-image::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(77, 168, 232, 0.2);
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
}

.about-text h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 1.25rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

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

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
}

.service-card:hover {
  border-color: rgba(77, 168, 232, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  background: var(--glass);
  border-radius: 10px;
  color: var(--accent);
  font-size: 1.35rem;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.65rem;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.service-card .link-arrow {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

/* Why us */
.why-section {
  background: var(--bg-card);
  border-block: 1px solid var(--border);
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.why-list {
  list-style: none;
  display: grid;
  gap: 1rem;
}

.why-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.why-list li::before {
  content: "✓";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 6px;
}

/* Vision banner */
.vision-banner {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(
    160deg,
    var(--bg-elevated) 0%,
    var(--bg-card) 100%
  );
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.vision-banner h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.vision-banner p {
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 5rem 0;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.cta-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

.cta-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    var(--bg-dark),
    rgba(12, 20, 36, 0.92)
  );
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta-inner p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Page hero (inner pages) */
.page-hero {
  padding: calc(var(--header-h) + 4rem) 0 3rem;
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-dark) 100%);
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 640px;
}

/* Service detail */
.service-detail {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

.service-detail:last-of-type {
  border-bottom: none;
}

.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.service-detail h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  margin-bottom: 1rem;
}

.service-detail .lead {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.service-detail h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  margin: 1.5rem 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.service-detail ul {
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.service-detail ul li {
  padding-left: 1.25rem;
  position: relative;
  color: var(--text-muted);
}

.service-detail ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.highlight-box {
  padding: 1.5rem;
  background: var(--bg-card);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 1.5rem;
}

.highlight-box p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.value-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.value-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.value-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Mission / Vision blocks */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.mv-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.mv-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

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

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info {
  display: grid;
  gap: 1.5rem;
}

.contact-item {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.contact-item h3 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.contact-form {
  display: grid;
  gap: 1.25rem;
}

.contact-form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form textarea {
  min-height: 140px;
  resize: vertical;
}

/* Footer */
.site-footer {
  padding: 4rem 0 2rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 1rem;
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Image placeholder when file missing */
.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 200px;
  background: linear-gradient(
    135deg,
    var(--bg-elevated),
    var(--bg-card)
  );
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 2rem;
}

/* Responsive */
@media (max-width: 992px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid,
  .why-grid,
  .service-detail-grid,
  .contact-grid,
  .mv-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-main,
  .header-actions .btn {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-main.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    padding: 2rem;
    gap: 1.5rem;
    align-items: flex-start;
  }

  .header-actions.open-mobile {
    display: flex;
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    right: 2rem;
    flex-direction: column;
  }

  .header-actions.open-mobile .btn {
    display: flex;
    width: 100%;
  }

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

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

  section {
    padding: 4rem 0;
  }
}