@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  --arka-plan: #06070a;
  --panel-arka-plan: #0c0e14;
  --kart-arka-plan: rgba(18, 20, 32, 0.6);
  --kart-kenarlik: rgba(255, 255, 255, 0.05);
  
  --metin-ana: #f8fafc;
  --metin-ikincil: #94a3b8;
  --metin-soluk: #64748b;
  
  /* Kurumsal Premium HSL Renk Şeması */
  --renk-birincil: #0284c7;        /* Gökyüzü Mavisi */
  --renk-birincil-glow: rgba(2, 132, 199, 0.2);
  --renk-ikincil: #6366f1;        /* İndigo */
  --renk-ikincil-glow: rgba(99, 102, 241, 0.2);
  
  --renk-basarili: #10b981;       /* Zümrüt Yeşili */
  --renk-basarili-glow: rgba(16, 185, 129, 0.25);
  --renk-hata: #f43f5e;           /* Gül Kırmızısı */
  --renk-hata-glow: rgba(244, 63, 94, 0.25);
  --renk-uyari: #f59e0b;          /* Kehribar Sarısı */
  
  --gecis-hizli: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --gecis-orta: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  --kenar-yumusatma-kart: 20px;
  --kenar-yumusatma-buton: 12px;
  --golge-derin: 0 12px 40px -10px rgba(0, 0, 0, 0.5);
  --golge-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

/* Scrollbar Özelleştirme */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--arka-plan);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--renk-birincil);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Outfit', sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--arka-plan);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 40%),
    radial-gradient(at 100% 0%, rgba(2, 132, 199, 0.08) 0px, transparent 40%),
    radial-gradient(at 50% 100%, rgba(16, 185, 129, 0.03) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--metin-ana);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* SOL KENAR ÇUBUĞU (PREMIUM SIDEBAR) */
aside.sol-menu {
  width: 280px;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  background: rgba(12, 14, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--kart-kenarlik);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 100;
}

.menu-logo-alani {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

.logo-simge {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--renk-birincil), var(--renk-ikincil));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.logo-metin {
  display: flex;
  flex-direction: column;
}

.logo-metin h2 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(to right, #ffffff, #e2e8f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-metin span {
  font-size: 11px;
  color: var(--metin-soluk);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.menu-navigasyon {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.menu-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  color: var(--metin-ikincil);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--kenar-yumusatma-buton);
  transition: var(--gecis-hizli);
}

.menu-link i {
  font-size: 18px;
}

.menu-link:hover, .menu-link.aktif {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.menu-link.aktif {
  background: linear-gradient(to right, rgba(99, 102, 241, 0.15), rgba(2, 132, 199, 0.05));
  border-left: 3px solid var(--renk-ikincil);
  padding-left: 13px; /* border-left kalınlığını dengelemek için */
}

.menu-profil-karti {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--kart-kenarlik);
  padding: 14px;
  border-radius: var(--kenar-yumusatma-kart);
  display: flex;
  align-items: center;
  gap: 12px;
}

.profil-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #0ea5e9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.profil-bilgi h4 {
  font-size: 13px;
  font-weight: 600;
}

.profil-bilgi span {
  font-size: 11px;
  color: var(--metin-soluk);
}

/* ANA PANEL (MAIN CONTAINER) */
main.ana-panel {
  margin-left: 280px;
  flex: 1;
  padding: 40px;
  max-width: 1600px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Üst Başlık & Durum Çubuğu */
.panel-ust {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.baslik-alani h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.baslik-alani p {
  font-size: 14px;
  color: var(--metin-ikincil);
  margin-top: 4px;
}

.aksiyon-bar {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* METRİKLER (STATS ROW) */
.metrik-satiri {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.metrik-kart {
  background: var(--kart-arka-plan);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-kart);
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--golge-derin);
  transition: var(--gecis-hizli);
}

.metrik-kart:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.2);
}

.metrik-detay h3 {
  font-size: 14px;
  font-weight: 500;
  color: var(--metin-ikincil);
}

.metrik-detay .sayi {
  font-size: 32px;
  font-weight: 700;
  margin-top: 8px;
  letter-spacing: -1px;
}

.metrik-detay .degisim {
  font-size: 12px;
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.metrik-detay .degisim.olumlu { color: var(--renk-basarili); }
.metrik-detay .degisim.notr { color: var(--metin-soluk); }

.metrik-ikon-kutusu {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.metrik-kart.m1 .metrik-ikon-kutusu { background: rgba(99, 102, 241, 0.1); color: var(--renk-ikincil); }
.metrik-kart.m2 .metrik-ikon-kutusu { background: rgba(16, 185, 129, 0.1); color: var(--renk-basarili); }
.metrik-kart.m3 .metrik-ikon-kutusu { background: rgba(244, 63, 94, 0.1); color: var(--renk-hata); }
.metrik-kart.m4 .metrik-ikon-kutusu { background: rgba(2, 132, 199, 0.1); color: var(--renk-birincil); }

/* İÇERİK BÖLÜMÜ (CONTENT SPLIT) */
.icerik-kapsayici {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
}

@media (max-width: 1200px) {
  .icerik-kapsayici {
    grid-template-columns: 1fr;
  }
}

/* TAHTALAR BÖLÜMÜ & ARAMA BAR */
.sol-bolum {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.filtre-paneli {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.arama-kutusu {
  position: relative;
  flex: 1;
  max-width: 400px;
}

.arama-kutusu input {
  width: 100%;
  background: var(--kart-arka-plan);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-buton);
  color: var(--metin-ana);
  padding: 12px 16px 12px 42px;
  font-size: 14px;
  outline: none;
  transition: var(--gecis-hizli);
}

.arama-kutusu input:focus {
  border-color: var(--renk-ikincil);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

.arama-kutusu span {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--metin-soluk);
  font-size: 16px;
}

.filtre-butonlari {
  display: flex;
  gap: 8px;
}

.filtre-butonu {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--kart-kenarlik);
  color: var(--metin-ikincil);
  padding: 10px 16px;
  border-radius: var(--kenar-yumusatma-buton);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: var(--gecis-hizli);
}

.filtre-butonu:hover, .filtre-butonu.aktif {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.15);
}

.filtre-butonu.aktif {
  border-color: var(--renk-ikincil);
  background: rgba(99, 102, 241, 0.1);
  color: var(--renk-ikincil);
}

/* TAHTA KARTI (LÜKS TASARIM) */
.tahta-grid-premium {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.tahta-kart-premium {
  background: var(--kart-arka-plan);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-kart);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 240px;
  box-shadow: var(--golge-derin);
  transition: var(--gecis-orta);
  position: relative;
  overflow: hidden;
}

.tahta-kart-premium::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--renk-ikincil), transparent);
  opacity: 0;
  transition: var(--gecis-orta);
}

.tahta-kart-premium:hover::before {
  opacity: 1;
}

.tahta-kart-premium:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.25);
  box-shadow: 0 20px 40px -15px rgba(99, 102, 241, 0.15);
}

/* Tahta Mockup Ekran Simülasyonu */
.tahta-mockup {
  height: 70px;
  background: #08090d;
  border: 4px solid #1c1e28;
  border-radius: 8px;
  margin-bottom: 15px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.8);
}

.tahta-mockup-ekran {
  width: 90%;
  height: 80%;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  transition: var(--gecis-orta);
}

.tahta-kart-premium.kilitli .tahta-mockup-ekran {
  background: radial-gradient(circle, rgba(244, 63, 94, 0.15) 0%, rgba(8, 9, 13, 0) 100%);
  border: 1px dashed rgba(244, 63, 94, 0.3);
}

.tahta-kart-premium.acik .tahta-mockup-ekran {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(8, 9, 13, 0) 100%);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.tahta-mockup-detay {
  font-size: 10px;
  color: var(--metin-ikincil);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tahta-mockup-qr {
  width: 24px;
  height: 24px;
  background: #fff;
  border-radius: 2px;
  padding: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tahta-mockup-qr span {
  font-size: 12px;
  color: #000;
}

.tahta-kart-premium.acik .tahta-mockup-qr {
  opacity: 0.15;
}

.kart-durum-rozet {
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tahta-kart-premium.acik .kart-durum-rozet {
  background: var(--renk-basarili-glow);
  color: var(--renk-basarili);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.tahta-kart-premium.kilitli .kart-durum-rozet {
  background: var(--renk-hata-glow);
  color: var(--renk-hata);
  border: 1px solid rgba(244, 63, 94, 0.2);
}

.kart-orta-alan {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kart-cihaz-adi {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

.kart-cihaz-id {
  font-size: 11px;
  color: var(--metin-soluk);
  font-family: monospace;
  margin-top: 2px;
}

/* PREMIUM KONTROL SWITCH (TOGGLE SWITCH) */
.switch-kontrol {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

.switch-kontrol input {
  opacity: 0;
  width: 0;
  height: 0;
}

.kaydirici {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.1);
  transition: .4s;
  border-radius: 34px;
  border: 1px solid var(--kart-kenarlik);
}

.kaydirici:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: var(--metin-ikincil);
  transition: .4s;
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.switch-kontrol input:checked + .kaydirici {
  background-color: var(--renk-basarili-glow);
  border-color: rgba(16, 185, 129, 0.3);
}

.switch-kontrol input:checked + .kaydirici:before {
  transform: translateX(24px);
  background-color: var(--renk-basarili);
  box-shadow: 0 0 10px var(--renk-basarili);
}

.switch-kontrol input:disabled + .kaydirici {
  opacity: 0.3;
  cursor: not-allowed;
}

.kart-alt-alan {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding-top: 14px;
  margin-top: 10px;
}

.baglanti-etiketi {
  font-size: 12px;
  color: var(--metin-soluk);
  display: flex;
  align-items: center;
  gap: 6px;
}

.baglanti-etiketi .sinyal-nokta {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--metin-soluk);
}

.cevrimici .sinyal-nokta {
  background: var(--renk-basarili);
  box-shadow: 0 0 8px var(--renk-basarili);
  animation: pulse-signal 2s infinite;
}

@keyframes pulse-signal {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.4; }
  100% { transform: scale(1); opacity: 1; }
}

/* BUTONLAR (PREMIUM GRADYAN) */
.btn-premium {
  background: linear-gradient(135deg, var(--renk-birincil), var(--renk-ikincil));
  color: #fff;
  border: none;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--kenar-yumusatma-buton);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--gecis-hizli);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
}

.btn-premium:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
  background: linear-gradient(135deg, #0284c7, #4f46e5);
}

.btn-ikincil {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--kart-kenarlik);
  color: var(--metin-ana);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--kenar-yumusatma-buton);
  cursor: pointer;
  transition: var(--gecis-hizli);
}

.btn-ikincil:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* SAĞ BÖLÜM (SETTINGS & TIMELINE LOGS) */
.sag-bolum {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.ayar-kart-premium {
  background: var(--kart-arka-plan);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-kart);
  padding: 24px;
  box-shadow: var(--golge-derin);
}

.ayar-kart-premium h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ayar-satir-input {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.ayar-satir-input label {
  font-size: 13px;
  color: var(--metin-ikincil);
}

.input-alani-premium {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-buton);
  color: #fff;
  padding: 12px 14px;
  font-size: 14px;
  outline: none;
  transition: var(--gecis-hizli);
}

.input-alani-premium:focus {
  border-color: var(--renk-ikincil);
}

/* ZAMAN TÜNELİ (TIMELINE LOGS) */
.gunluk-kart-premium {
  background: var(--kart-arka-plan);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-kart);
  padding: 24px;
  box-shadow: var(--golge-derin);
  display: flex;
  flex-direction: column;
  max-height: 480px;
}

.gunluk-kart-premium h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
}

.zaman-tuneli {
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  padding-right: 8px;
}

.t-oge {
  display: flex;
  gap: 16px;
  position: relative;
}

.t-oge:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 24px;
  left: 11px;
  width: 2px;
  height: calc(100% + 4px);
  background: rgba(255, 255, 255, 0.05);
}

.t-ikon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  z-index: 2;
}

.t-oge.KİLİT_ACILDI .t-ikon { background: var(--renk-basarili-glow); color: var(--renk-basarili); }
.t-oge.KİLİTLENDİ .t-ikon { background: var(--renk-hata-glow); color: var(--renk-hata); }
.t-oge.BAĞLANTI_KURULDU .t-ikon { background: rgba(2, 132, 199, 0.15); color: var(--renk-birincil); }
.t-oge.BAĞLANTI_KOPTU .t-ikon { background: rgba(255, 255, 255, 0.06); color: var(--metin-soluk); }

.t-icerik {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.t-detay {
  font-size: 13px;
  color: var(--metin-ana);
  line-height: 1.4;
}

.t-alt-satir {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--metin-soluk);
}

/* LÜKS MODAL MASKE */
.modal-maske-premium {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4, 5, 8, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fade-in 0.2s ease;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-premium {
  background: #0d0f17;
  border: 1px solid rgba(255, 255, 255, 0.08);
  width: 90%;
  max-width: 440px;
  border-radius: var(--kenar-yumusatma-kart);
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
  gap: 20px;
  transform: translateY(0);
}

.modal-premium h3 {
  font-size: 20px;
  font-weight: 700;
}

/* ÖĞRETMEN YÖNETİMİ TABLE STİLLERİ */
.tablo-kapsayici {
  background: var(--kart-arka-plan);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--kart-kenarlik);
  border-radius: var(--kenar-yumusatma-kart);
  padding: 24px;
  box-shadow: var(--golge-derin);
  overflow-x: auto;
}

.premium-tablo {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.premium-tablo th {
  padding: 14px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--metin-ikincil);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.premium-tablo td {
  padding: 16px;
  font-size: 14px;
  color: var(--metin-ana);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  transition: var(--gecis-hizli);
}

.premium-tablo tr:hover td {
  background: rgba(255, 255, 255, 0.01);
}

.btn-sil {
  background: var(--renk-hata-glow);
  color: var(--renk-hata);
  border: 1px solid rgba(244, 63, 94, 0.2);
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--gecis-hizli);
}

.btn-sil:hover {
  background: var(--renk-hata);
  color: #fff;
  transform: translateY(-1px);
}

.btn-tahta-sil {
  opacity: 0.6;
}

.btn-tahta-sil:hover {
  color: var(--renk-hata) !important;
  opacity: 1;
  transform: scale(1.1);
}