/* ==========================================================================
   MUAS Mimarlık Mühendislik - Minimalist Aydınlık / Beyaz Tasarım Sistemi
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Beyaz Ağırlıklı Aydınlık Palet */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9F9F8;
  --bg-tertiary: #F2F2EF;
  --bg-card: #FFFFFF;

  /* Siyah & Gri Metinler */
  --text-primary: #0A0A0A;
  --text-secondary: #333333;
  --text-muted: #737373;
  --text-light: #A3A3A3;

  /* İnce Mimari Çizgiler & Kenarlıklar */
  --border-light: #EBEBEA;
  --border-medium: #D1D1CE;
  --border-dark: #0A0A0A;

  /* Tipografi */
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container-max: 1320px;
  --container-padding: clamp(1.25rem, 4vw, 3rem);
  --header-height: 84px;

  /* Geçişler */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-family);
  line-height: 1.65;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1 0 auto;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

ul {
  list-style: none;
}

/* Kapsayıcılar */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-narrow {
  max-width: 980px;
}

.section-padding {
  padding-top: clamp(4rem, 7vw, 7.5rem);
  padding-bottom: clamp(4rem, 7vw, 7.5rem);
}

.section-padding-sm {
  padding-top: clamp(2.5rem, 4vw, 4rem);
  padding-bottom: clamp(2.5rem, 4vw, 4rem);
}

/* Bölüm Başlıkları (Siyah & Sade) */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.section-tag::before {
  content: '';
  display: inline-block;
  width: 22px;
  height: 1.5px;
  background-color: var(--text-primary);
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.section-subtitle {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 680px;
  font-weight: 400;
}

.section-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 1.75rem;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* Butonlar (Siyah-Beyaz Kontrast) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.95rem 2rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 0;
  cursor: pointer;
  transition: all var(--transition-smooth);
}

.btn-black {
  background-color: var(--text-primary);
  color: #FFFFFF;
  border: 1px solid var(--text-primary);
}

.btn-black:hover {
  background-color: transparent;
  color: var(--text-primary);
}

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

.btn-outline-black:hover {
  border-color: var(--text-primary);
  background-color: var(--text-primary);
  color: #FFFFFF;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-medium);
  padding-bottom: 0.25rem;
}

.btn-link:hover {
  border-color: var(--text-primary);
  gap: 0.85rem;
}

/* ==========================================================================
   Header & Menü (Beyaz / Aydınlık)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: height var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.is-scrolled {
  height: 72px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo img {
  height: 42px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.nav-link {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.5rem 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--text-primary);
  transition: width var(--transition-smooth);
}

.nav-link:hover, .nav-link.is-active {
  color: var(--text-primary);
}

.nav-link:hover::after, .nav-link.is-active::after {
  width: 100%;
}

/* Mobil Hamburger Butonu */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1010;
  padding: 6px;
}

.mobile-nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-smooth);
}

.mobile-nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.mobile-nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobil Çekmece Menü */
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: #FFFFFF;
  z-index: 1005;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.5rem;
  transform: translateY(-100%);
  transition: transform var(--transition-smooth);
}

.mobile-drawer.is-open {
  transform: translateY(0);
}

.mobile-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  margin-bottom: 2.5rem;
}

.mobile-nav-link {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* ==========================================================================
   Hero Bölümü (Aydınlık & Ferah)
   ========================================================================== */
.hero-light {
  padding-top: calc(var(--header-height) + clamp(3rem, 6vw, 6rem));
  padding-bottom: clamp(3.5rem, 6vw, 6rem);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

.hero-tagline-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  margin-bottom: 1.5rem;
}

.hero-main-title {
  font-size: clamp(2.4rem, 5.5vw, 5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.6rem;
  max-width: 1000px;
}

.hero-sub-text {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 740px;
  font-weight: 400;
  margin-bottom: 2.5rem;
}

.hero-image-showcase {
  margin-top: 3rem;
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border: 1px solid var(--border-light);
  background-color: var(--bg-tertiary);
}

.hero-image-showcase img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(105%) grayscale(25%);
}

/* ==========================================================================
   Hizmet Kartları (Beyaz Kartlar, İnce Çizgiler)
   ========================================================================== */
.services-light-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-box-light {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.service-box-light:hover {
  border-color: var(--text-primary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
  transform: translateY(-3px);
}

.service-box-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--bg-tertiary);
}

.service-box-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(85%);
  transition: transform var(--transition-smooth), filter var(--transition-smooth);
}

.service-box-light:hover .service-box-media img {
  filter: grayscale(0%);
  transform: scale(1.04);
}

.service-box-num {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  background: #FFFFFF;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border-light);
}

.service-box-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.service-box-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.service-box-desc {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 1.5rem;
  flex: 1;
}

/* ==========================================================================
   Projeler Bölümü (Editoryal Vitrin)
   ========================================================================== */
.projects-light-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.project-card-light {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.project-card-light:hover {
  border-color: var(--text-primary);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.04);
}

.project-card-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--bg-tertiary);
}

.project-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(80%);
  transition: transform var(--transition-smooth), filter var(--transition-smooth);
}

.project-card-light:hover .project-card-media img {
  filter: grayscale(0%);
  transform: scale(1.03);
}

.project-card-status {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  background: #FFFFFF;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border-light);
}

.project-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-card-meta {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.project-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.project-card-summary {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 1.25rem;
}

.project-confidential-box {
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border-left: 2px solid var(--text-primary);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* ==========================================================================
   İş Ortaklığı Kartı (AVEK Otomotiv)
   ========================================================================== */
.partner-highlight-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  padding: clamp(2rem, 5vw, 3.5rem);
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 2.5rem;
  align-items: center;
}

.partner-badge-clean {
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  padding: 2.5rem 2rem;
  text-align: center;
}

.partner-badge-name {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--text-primary);
}

.partner-badge-sub {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--text-muted);
}

/* ==========================================================================
   İletişim Formu (Beyaz & Temiz Tasarım)
   ========================================================================== */
.form-light-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.form-group-light {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group-light label {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.form-input-light {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-medium);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.95rem;
  border-radius: 0;
  transition: all var(--transition-fast);
}

.form-input-light:focus {
  outline: none;
  background-color: #FFFFFF;
  border-color: var(--text-primary);
}

textarea.form-input-light {
  resize: vertical;
  min-height: 120px;
}

.status-badge-success {
  padding: 1rem 1.25rem;
  background-color: #E8F5E9;
  border: 1px solid #C8E6C9;
  color: #2E7D32;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.status-badge-error {
  padding: 1rem 1.25rem;
  background-color: #FFEBEE;
  border: 1px solid #FFCDD2;
  color: #C62828;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Footer (Aydınlık & Minimalist)
   ========================================================================== */
.site-footer-light {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding-top: clamp(3.5rem, 6vw, 5rem);
  padding-bottom: 2rem;
}

.footer-light-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-heading-light {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links-light {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-light a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.footer-links-light a:hover {
  color: var(--text-primary);
  padding-left: 0.25rem;
}

.footer-bottom-light {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-light);
  padding-top: 1.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .services-light-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-light-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .partner-highlight-box {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-nav, .header-cta {
    display: none;
  }
  .mobile-nav-toggle {
    display: flex;
  }
  .services-light-grid, .projects-light-grid {
    grid-template-columns: 1fr;
  }
  .footer-light-grid {
    grid-template-columns: 1fr;
  }
}