/* ==========================================================================
   Gonca Kaya - Özel Eğitim Öğretmeni
   Modern, Temiz ve Duyarlı Web Sitesi Stilleri
   ========================================================================== */

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

:root {
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  --color-primary-dark: #12151a;
  --color-text-main: #1e2229;
  --color-text-muted: #4e5562;
  --color-text-light: #6c7585;
  --color-bg-light: #f5f7fa;
  --color-card-bg: #ffffff;
  --color-border: #e2e6ed;
  --color-accent: #2c3e50;
  --color-pill-bg: #eaecf0;
  --color-pill-hover: #e0e3e9;
  
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-avatar: 0 12px 36px rgba(0, 0, 0, 0.22);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-main);
  background-color: var(--color-bg-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

/* ==========================================================================
   Header & Navigasyon
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 18px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 230, 237, 0.7);
  transition: var(--transition);
}

.brand-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: #e9ecef;
  color: #495057;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 4px;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary-dark);
}

.site-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 4px;
  right: 4px;
  height: 2px;
  background-color: var(--color-primary-dark);
  border-radius: 2px;
}

.nav-btn {
  background: var(--color-primary-dark);
  color: #ffffff !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-pill);
  transition: var(--transition);
}

.nav-btn:hover {
  background: #2b303a;
  transform: translateY(-1px);
}

/* ==========================================================================
   Hero Bölümü - Referans Fotoğrafla Birebir Uyumlu
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #d8dde3;
  background-image: url('assets/geometric_bg.jpg');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  padding: 100px 60px 60px;
  overflow: hidden;
}

/* Hafif yumuşatıcı parlaklık katmanı */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 35% 50%, rgba(255, 255, 255, 0.4) 0%, rgba(220, 225, 232, 0.15) 100%);
  pointer-events: none;
}

.hero-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
}

.hero-text-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-left: 20px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3.2rem, 6.2vw, 5.2rem);
  font-weight: 900;
  line-height: 1.05;
  color: #0d0f12;
  letter-spacing: -1px;
  margin-bottom: 12px;
  text-transform: uppercase;
  text-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
}

.hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
  font-weight: 700;
  color: #3b4049;
  letter-spacing: -0.3px;
  margin-bottom: 34px;
  line-height: 1.25;
}

/* Referans fotoğraftaki butonun birebir kopyası */
.hero-pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #eaedf1;
  color: #1a1e24;
  font-family: var(--font-heading);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  font-weight: 800;
  letter-spacing: 0.5px;
  text-decoration: none;
  padding: 16px 42px;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), inset 0 1px 2px rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.7);
  transition: var(--transition);
  cursor: pointer;
}

.hero-pill-btn:hover {
  background: #dfe3e8;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18), inset 0 1px 2px rgba(255, 255, 255, 0.9);
  color: #000000;
}

.hero-pill-btn:active {
  transform: translateY(0) scale(0.99);
}

/* Sağ taraftaki dairesel profil görseli */
.hero-image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-avatar-circle {
  width: clamp(260px, 32vw, 420px);
  height: clamp(260px, 32vw, 420px);
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28), 0 6px 16px rgba(0, 0, 0, 0.15);
  border: 5px solid rgba(255, 255, 255, 0.85);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  background: #b5c7d8;
}

.hero-avatar-circle:hover {
  transform: scale(1.02);
  box-shadow: 0 26px 60px rgba(0, 0, 0, 0.35);
}

.hero-avatar-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ==========================================================================
   Özet & İstatistikler Şeridi
   ========================================================================== */
.stats-strip {
  background: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 20px;
}

.stats-container {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 10px 15px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-light);
}

/* ==========================================================================
   Sertifikalar Sayfası & Kartlar
   ========================================================================== */
.certificates-page-header {
  padding: 130px 20px 40px;
  text-align: center;
  background: linear-gradient(180deg, #e9edf2 0%, var(--color-bg-light) 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-badge {
  display: inline-block;
  background: var(--color-primary-dark);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.page-main-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.page-description {
  max-width: 700px;
  margin: 0 auto 30px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* Arama ve Filtre Kontrolleri */
.controls-container {
  max-width: 1100px;
  margin: 0 auto 40px;
  padding: 0 20px;
}

.search-box-wrapper {
  position: relative;
  max-width: 520px;
  margin: 0 auto 24px;
}

.search-input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  font-size: 0.98rem;
  font-family: var(--font-body);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: #ffffff;
  color: var(--color-text-main);
  box-shadow: var(--shadow-sm);
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 0 4px rgba(18, 21, 26, 0.08);
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-light);
  pointer-events: none;
}

/* Filtreleme Sekmeleri (Tabs) */
.filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.filter-btn {
  border: none;
  background: #ffffff;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.filter-btn:hover {
  background: #f1f3f7;
  color: var(--color-primary-dark);
}

.filter-btn.active {
  background: var(--color-primary-dark);
  color: #ffffff;
  border-color: var(--color-primary-dark);
}

/* Sertifika Kartları Izgarası (Grid) */
.certificates-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px 20px 80px;
}

.category-section {
  margin-bottom: 60px;
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.category-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: 12px;
}

.category-count {
  font-size: 0.85rem;
  font-weight: 600;
  background: #e9ecef;
  color: #495057;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
}

/* Tekil Sertifika Kartı */
.cert-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.cert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd3df;
}

.cert-thumbnail-wrapper {
  position: relative;
  width: 100%;
  padding-top: 70%; /* Aspect ratio ~1.4:1 */
  background: #f0f2f5;
  overflow: hidden;
  cursor: pointer;
}

.cert-thumbnail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.cert-thumbnail-wrapper:hover .cert-thumbnail {
  transform: scale(1.05);
}

.cert-thumbnail-overlay {
  position: absolute;
  inset: 0;
  background: rgba(18, 21, 26, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.cert-thumbnail-wrapper:hover .cert-thumbnail-overlay {
  opacity: 1;
}

.overlay-btn {
  background: #ffffff;
  color: var(--color-primary-dark);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
}

.cert-card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.cert-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.badge-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.badge-pedagogy {
  background: #e8f5e9;
  color: #2e7d32;
}

.badge-rights {
  background: #e3f2fd;
  color: #1565c0;
}

.badge-safety {
  background: #fff3e0;
  color: #e65100;
}

.badge-parent {
  background: #f3e5f5;
  color: #7b1fa2;
}

.badge-coaching {
  background: #e0f2f1;
  color: #00695c;
}

.badge-uni {
  background: #ede7f6;
  color: #4527a0;
}

.badge-hours {
  background: #f1f3f5;
  color: #495057;
}

.cert-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.35;
  margin-bottom: 12px;
  flex-grow: 1;
}

.cert-meta-list {
  list-style: none;
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-bottom: 18px;
  border-top: 1px dashed var(--color-border);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cert-meta-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.meta-label {
  color: var(--color-text-light);
}

.meta-val {
  font-weight: 600;
  color: var(--color-text-main);
}

.cert-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: auto;
}

.btn-action-view {
  background: #f1f3f6;
  color: var(--color-primary-dark);
  border: none;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-action-view:hover {
  background: #e2e6eb;
}

.btn-action-pdf {
  background: var(--color-primary-dark);
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 10px;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-action-pdf:hover {
  background: #2b303a;
}

/* ==========================================================================
   Hakkında / Vizyon Bölümü (index.html için zenginleştirme)
   ========================================================================== */
.about-section {
  padding: 80px 20px;
  background: #ffffff;
}

.about-container {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-image-card {
  position: relative;
  background: #f8f9fa;
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.about-quote {
  font-style: italic;
  font-size: 1.1rem;
  color: #495057;
  line-height: 1.7;
  margin-top: 20px;
}

.about-author {
  margin-top: 14px;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.about-content h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.about-content p {
  color: var(--color-text-muted);
  font-size: 1.02rem;
  margin-bottom: 20px;
}

.feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.feature-chip {
  background: #f1f3f7;
  color: var(--color-text-main);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #111418;
  color: #9aa1ad;
  padding: 40px 20px;
  text-align: center;
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.footer-title {
  color: #ced4da;
  font-weight: 500;
}

.footer-copy {
  margin-top: 10px;
  font-size: 0.82rem;
  color: #6c757d;
}

/* ==========================================================================
   Görsel Lightbox Modalı
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 13, 18, 0.9);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 30px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox-modal.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  position: relative;
  max-width: 1050px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-header {
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8f9fa;
  border-bottom: 1px solid var(--color-border);
}

.lightbox-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.lightbox-close-btn {
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
  padding: 4px 8px;
  border-radius: 4px;
  transition: var(--transition);
}

.lightbox-close-btn:hover {
  color: #000;
  background: #e9ecef;
}

.lightbox-body {
  padding: 16px;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #1e2229;
}

.lightbox-img {
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
}

.lightbox-footer {
  padding: 14px 24px;
  background: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Responsive Düzenlemeler
   ========================================================================== */
@media (max-width: 960px) {
  .hero-section {
    padding: 120px 24px 60px;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-text-content {
    align-items: center;
    padding-left: 0;
    order: 2;
  }
  
  .hero-image-wrapper {
    order: 1;
  }
  
  .hero-avatar-circle {
    width: 280px;
    height: 280px;
  }
  
  .about-container {
    grid-template-columns: 1fr;
  }
  
  .stats-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .site-header {
    padding: 14px 20px;
  }
  
  .site-nav a:not(.nav-btn) {
    display: none;
  }
  
  .hero-title {
    font-size: 2.7rem;
  }
  
  .hero-subtitle {
    font-size: 1.3rem;
  }
  
  .hero-pill-btn {
    padding: 14px 32px;
    font-size: 1.05rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-container {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}