body.new-year-theme {
  /* Derin Gece Mavisi ve Buzul Tonları */
  --bg-main: #020510;
  --bg-content: #0a1124;
  --bg-elevated: #111b36;
  --bg-elevated-transparent: rgba(10, 20, 40, 0.9);

  --text-primary: #e0f7fa;
  /* Buz Beyazı */
  --text-secondary: #b3e5fc;
  /* Açık Mavi */
  --text-tertiary: #5d7a99;
  --text-placeholder: #455a64;

  --accent-primary: #00f3ff;
  /* Neon Buz Mavisi */
  --accent-secondary: #00ff9d;
  /* Aurora Yeşili */
  --text-on-accent: #000000;

  --border-color: #1e2f52;
  --border-input: #263a61;

  --bg-message-user: #004d61;
  /* Derin Okyanus */
  --bg-message-assistant: rgba(20, 30, 50, 0.8);
  /* Buzlu Gece */

  --modal-overlay: rgba(2, 5, 16, 0.95);

  /* Kuzey Işıkları (Aurora) Gradyanı */
  background-image: linear-gradient(to bottom, #020510 0%, #051026 100%);
  background-attachment: fixed;
}

/* ÖZEL ANİMASYON 1: YAZIYOR (TYPING) - BUZ KRİSTALLERİ */
body.new-year-theme #thinkingIndicator>div {
  background-color: #00f3ff;
  /* Buz Mavisi */
  box-shadow: 0 0 10px #00f3ff, 0 0 20px #00f3ff;
  border-radius: 50%;
  /* Hafif köşeli kristal hissi için border-radius 0 yapılabilir ama yuvarlak glow daha iyi durur */
  animation: icePulse 1s infinite alternate;
}

@keyframes icePulse {
  0% {
    transform: scale(0.8);
    opacity: 0.5;
    box-shadow: 0 0 5px #00f3ff;
  }

  100% {
    transform: scale(1.2);
    opacity: 1;
    box-shadow: 0 0 15px #00f3ff, 0 0 30px #ffffff;
  }
}

/* ÖZEL ANİMASYON 2: GÖRSEL OLUŞTURMA LOADER'I - AURORA BOREALIS */
body.new-year-theme .visualize-gradient-loader {
  /* Kuzey Işıkları Renkleri */
  background: linear-gradient(-45deg, #000428, #004e92, #00ff9d, #00f3ff, #5a189a);
  background-size: 400% 400%;
  border: 2px solid rgba(0, 243, 255, 0.3);
  box-shadow: 0 0 30px rgba(0, 243, 255, 0.15);
}

/* KAR YAĞIŞI EFEKTİ */
body.new-year-theme::before {
  content: '';
  position: fixed;
  top: -10px;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99999;
  /* Kar taneleri daha beyaz ve parlak */
  background-image:
    radial-gradient(3px 3px at 20% 30%, #fff, transparent),
    radial-gradient(3px 3px at 40% 70%, #fff, transparent),
    radial-gradient(2px 2px at 50% 160%, #a5f3fc, transparent),
    /* Hafif mavi kar */
    radial-gradient(3px 3px at 80% 120%, #fff, transparent),
    radial-gradient(4px 4px at 10% 50%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(4px 4px at 50% 100%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(4px 4px at 90% 40%, rgba(255, 255, 255, 0.9), transparent);
  background-size: 500px 500px;
  animation: snowFall 18s linear infinite;
  opacity: 0.8;
}

/* İkinci Kar Katmanı (Derinlik) */
body.new-year-theme::after {
  content: '';
  position: fixed;
  top: -10px;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99998;
  background-image:
    radial-gradient(2px 2px at 15% 25%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 35% 65%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 65% 15%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 85% 55%, rgba(255, 255, 255, 0.6), transparent);
  background-size: 350px 350px;
  animation: snowFall 28s linear infinite reverse;
  opacity: 0.6;
}

@keyframes snowFall {
  0% {
    transform: translateY(0);
  }

  100% {
    transform: translateY(800px);
  }
}



/* --- EKSTRA: TIKLAMA EFEKTİ (HAFİF BUZ SİSİ - REVIZE EDİLDİ) --- */
.click-frost {
  position: fixed;
  pointer-events: none;
  width: 40px;
  /* Biraz daha geniş ama silik */
  height: 40px;
  /* Opaklık %90'dan %30'a düşürüldü, sert beyaz yerine buz mavisi ağırlıklı */
  background: radial-gradient(circle, rgba(165, 243, 252, 0.3) 0%, rgba(255, 255, 255, 0.1) 40%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0.5);
  animation: frostMist 0.8s ease-out forwards;
  z-index: 100000;
  /* Gölge kaldırıldı veya çok silikleştirildi */
  filter: blur(4px);
  /* Keskin kenarlar yok edildi, sis efekti verildi */
  mix-blend-mode: screen;
  /* Arka planla daha iyi kaynaşması için */
}

@keyframes frostMist {
  0% {
    transform: translate(-50%, -50%) scale(0.5);
    opacity: 0.6;
  }

  100% {
    transform: translate(-50%, -50%) scale(2.5);
    /* Daha geniş yayılım */
    opacity: 0;
  }
}

/* ================================================ */
/* === RYUKO (LOVE) TEMASI - SOFT & ROMANTİK === */
/* ================================================ */
/* ================================================ */
/* === RYUKO (LOVE) TEMASI - SOFT & ROMANTİK === */
/* ================================================ */
/* ================================================================== */
/* === TEMA EFEKT MOTORU & YENİ NESİL TASARIMLAR === */
/* ================================================================== */

/* 1. Efekt Katmanının Temel Ayarı */
#theme-effect-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  display: none;
  overflow: hidden;
}

/* 2. Kapsayıcıları Şeffaf Yap (Efektler Görünsün) */
body.ryuko-theme .app-container,
body.ryuko-theme .main-content-area,
body.moonlight-theme .app-container,
body.moonlight-theme .main-content-area,
body.matrix-theme .app-container,
body.matrix-theme .main-content-area {
  background-color: transparent !important;
  background: transparent !important;
}

/* 3. Kart Okunabilirliği (Hafif Renkli Cam) */
body.ryuko-theme .card,
body.ryuko-theme .settings-card,
body.moonlight-theme .card,
body.moonlight-theme .settings-card,
body.matrix-theme .card,
body.matrix-theme .settings-card {
  background-color: var(--bg-elevated-transparent) !important;
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
}

/* ================================================================== */
/* === RYUKO (AMOLED DARK LOVE) - YENİDEN TASARLANDI === */
/* ================================================================== */
body.ryuko-theme {
  /* AMOLED Siyah ve Soft Bordo/Gül Kurusu */
  --bg-main: #050001;
  /* Neredeyse siyah (Amoled) */
  --bg-content: #1a050a;
  /* Çok koyu bordo */
  --bg-elevated: #2d0a12;
  --bg-elevated-transparent: rgba(30, 5, 10, 0.85);

  --text-primary: #ffe6ea;
  /* Soluk pembe beyaz */
  --text-secondary: #dcb5be;
  /* Kirli pembe */
  --text-tertiary: #8f5a6a;
  --text-placeholder: #6e3b4b;
  --text-on-accent: #ffffff;
  --text-link: #ff4d6d;

  --accent-primary: #b31237;
  /* Derin Bordo/Kırmızı */
  --accent-secondary: #ff4d6d;
  /* Canlı ama koyu pembe */

  --border-color: #4a0e1e;
  --border-input: #360812;

  --bg-message-user: #8a0e2b;
  /* Bordo Mesaj */
  --bg-message-assistant: rgba(45, 10, 18, 0.9);
  --bg-message-assistant-blur: 8px;

  --modal-overlay: rgba(10, 0, 2, 0.96);
  --blur-intensity-current: 10px;
  --bg-image-current: none;

  /* Arka Plan: Tam Ortada 'Ryuko' Yazısı (SVG) */
  background-color: #050001;
  background-image: url("data:image/svg+xml,%3Csvg width='100%25' height='100%25' xmlns='http://www.w3.org/2000/svg'%3E%3Cstyle%3E@import url('https://fonts.googleapis.com/css2?family=Cinzel+Decorative:wght@900&display=swap');%3C/style%3E%3Ctext x='50%25' y='50%25' dominant-baseline='middle' text-anchor='middle' font-family='Cinzel Decorative, serif' font-weight='900' font-size='15vw' fill='%231a050a' stroke='%232d0a12' stroke-width='1' letter-spacing='5px' opacity='0.5'%3ERYUKO%3C/text%3E%3C/svg%3E");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
}

/* Ryuko Efekt Katmanı (Akan Kalpler) */
body.ryuko-theme #theme-effect-layer {
  display: block;
  /* Akan Kalp Deseni */
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M10 3.22l-.61-.6a5.5 5.5 0 0 0-7.78 7.77L10 18.78l8.39-8.4a5.5 5.5 0 0 0-7.78-7.77l-.61.61z' fill='%23b31237' fill-opacity='0.2'/%3E%3C/svg%3E");
  background-size: 40px 40px;
  animation: heartsFlow 20s linear infinite;
}

@keyframes heartsFlow {
  0% {
    background-position: 0 0;
  }

  100% {
    background-position: 40px 80px;
  }

  /* Aşağı doğru akış */
}

/* ================================================================== */
/* === MOONLIGHT (ULTRA NIGHT) - YILDIZLAR ARTIRILDI === */
/* ================================================================== */
body.moonlight-theme {
  /* Derin Gece Paleti */
  --bg-main: #02040a;
  --bg-content: rgba(10, 15, 30, 0.6);
  --bg-elevated: rgba(20, 30, 50, 0.7);
  --bg-elevated-transparent: rgba(10, 15, 30, 0.8);

  --text-primary: #eef2ff;
  --text-secondary: #a5b4fc;
  --text-tertiary: #6366f1;

  --accent-primary: #818cf8;
  --accent-secondary: #c084fc;

  --border-color: rgba(99, 102, 241, 0.2);
  --border-input: rgba(30, 41, 59, 0.5);

  --bg-message-user: #4338ca;
  --bg-message-assistant: rgba(15, 23, 42, 0.8);

  /* Arka Plan Gradient */
  background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #0f172a 40%, #020617 100%);
  background-attachment: fixed;
}

/* Moonlight Efekt Katmanı (Çok Katmanlı Yıldızlar) */
body.moonlight-theme #theme-effect-layer {
  display: block;
  background-image:
    radial-gradient(1px 1px at 5% 10%, #fff, transparent),
    radial-gradient(1px 1px at 15% 25%, #fff, transparent),
    radial-gradient(2px 2px at 25% 5%, #fff, transparent),
    radial-gradient(1px 1px at 35% 45%, #fff, transparent),
    radial-gradient(2px 2px at 45% 15%, #a5b4fc, transparent),
    /* Mavi Yıldız */
    radial-gradient(1px 1px at 55% 55%, #fff, transparent),
    radial-gradient(1px 1px at 65% 35%, #fff, transparent),
    radial-gradient(2px 2px at 75% 65%, #fff, transparent),
    radial-gradient(1px 1px at 85% 15%, #c084fc, transparent),
    /* Mor Yıldız */
    radial-gradient(1px 1px at 95% 50%, #fff, transparent);
  background-size: 300px 300px;
  opacity: 0.9;
  animation: galaxyRotate 120s linear infinite;
}

@keyframes galaxyRotate {
  0% {
    background-position: 0 0;
  }

  100% {
    background-position: 300px 300px;
  }
}

/* ================================================================== */
/* === MATRIX (HACKER) TEMASI - YENİ === */
/* ================================================================== */
body.matrix-theme {
  --bg-main: #000000;
  --bg-content: rgba(0, 20, 0, 0.7);
  --bg-elevated: #001a00;
  --bg-elevated-transparent: rgba(0, 20, 0, 0.9);

  --text-primary: #00ff00;
  /* Hacker Yeşili */
  --text-secondary: #00cc00;
  --text-tertiary: #008800;
  --text-placeholder: #004400;
  --text-on-accent: #000000;
  --text-link: #00ff00;

  --accent-primary: #00ff00;
  --accent-secondary: #00aa00;

  --border-color: #004400;
  --border-input: #002200;

  --bg-message-user: #003300;
  --bg-message-assistant: rgba(0, 10, 0, 0.9);
  --bg-message-assistant-blur: 0px;

  --modal-overlay: rgba(0, 0, 0, 0.95);
  --code-bg: #001100;
  --code-header-bg: #002200;

  font-family: 'Courier New', monospace;
  letter-spacing: 0.5px;
  background-color: #000000;
}

/* Matrix Efekt Katmanı (Digital Rain Simülasyonu) */
body.matrix-theme #theme-effect-layer {
  display: block;
  background-image: linear-gradient(0deg, transparent 20%, rgba(0, 255, 0, 0.1) 50%, transparent 80%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Ctext x='5' y='15' fill='%23003300' font-family='monospace' font-size='12'%3E1%3C/text%3E%3Ctext x='25' y='35' fill='%23005500' font-family='monospace' font-size='12'%3E0%3C/text%3E%3Ctext x='45' y='10' fill='%23002200' font-family='monospace' font-size='12'%3E1%3C/text%3E%3Ctext x='15' y='50' fill='%23004400' font-family='monospace' font-size='12'%3E0%3C/text%3E%3C/svg%3E");
  background-size: 100% 100%, 60px 60px;
  animation: matrixRain 2s infinite linear;
  opacity: 0.7;
}

@keyframes matrixRain {
  0% {
    background-position: 0 0, 0 0;
  }

  100% {
    background-position: 0 100%, 0 60px;
  }
}

/* Matrix Özel Buton Stili */
body.matrix-theme .button {
  border-radius: 0;
  border: 1px solid #00ff00;
  box-shadow: 0 0 5px #00ff00;
  text-transform: uppercase;
}

body.matrix-theme .message {
  border-radius: 0;
  border: 1px solid #00ff00;
}

/* Pseudo elementlerin çakışmasını önlemek için temizlik */
body.ryuko-theme::before,
body.moonlight-theme::before {
  display: none !important;
  content: none !important;
}

/* --- RYUKO ÖZEL LOGO AYARLARI --- */
#headerSpecialLogo {
  display: none;
  height: 36px;
  /* Header'a sığması için küçültüldü */
  margin-right: 5px;
  margin-left: 5px;
  object-fit: contain;
  /* Önce ince sert beyaz kenar (Stroke simülasyonu), sonra pembe glow */
  filter:
    drop-shadow(1px 0 0 #fff) drop-shadow(-1px 0 0 #fff) drop-shadow(0 1px 0 #fff) drop-shadow(0 -1px 0 #fff) drop-shadow(0 0 10px #ff6b9d);
  /* Pembe Glow */
  transition: all 0.3s ease;
  animation: logoFloat 3s ease-in-out infinite;
  z-index: 10;
}

/* Sadece Ryuko Temasında Göster */
body.ryuko-theme #headerSpecialLogo {
  display: block;
}

@keyframes logoFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-2px);
  }
}

body.ocean-breeze-active {
  --bg-main: var(--bg-main-ocean-breeze);
  --bg-content: var(--bg-content-ocean-breeze);
  --bg-elevated: var(--bg-elevated-ocean-breeze);
  --bg-elevated-transparent: var(--bg-elevated-transparent-ocean-breeze);
  --text-primary: var(--text-primary-ocean-breeze);
  --text-secondary: var(--text-secondary-ocean-breeze);
  --text-tertiary: color-mix(in srgb, var(--text-secondary-ocean-breeze) 70%, var(--bg-main-ocean-breeze));
  --text-placeholder: color-mix(in srgb, var(--text-secondary-ocean-breeze) 50%, var(--bg-main-ocean-breeze));
  --text-on-accent: #FFFFFF;
  --text-link: var(--accent-primary-ocean-breeze);
  --border-color: var(--border-ocean-breeze);
  --border-input: color-mix(in srgb, var(--border-ocean-breeze) 70%, var(--bg-content-ocean-breeze));
  --accent-primary: var(--accent-primary-ocean-breeze);
  --accent-secondary: var(--accent-secondary-ocean-breeze);
  --bg-message-user: var(--bg-message-user-ocean-breeze);
  --bg-message-assistant: var(--bg-message-assistant-ocean-breeze);
  --bg-message-assistant-blur: var(--bg-message-assistant-blur-ocean-breeze);
  --code-bg: var(--code-bg-ocean-breeze);
  --code-header-bg: var(--code-header-bg-ocean-breeze);
  --modal-overlay: var(--modal-overlay-ocean-breeze);
}

body.emerald-forest-active {
  --bg-main: var(--bg-main-emerald-forest);
  --bg-content: var(--bg-content-emerald-forest);
  --bg-elevated: var(--bg-elevated-emerald-forest);
  --bg-elevated-transparent: var(--bg-elevated-transparent-emerald-forest);
  --text-primary: var(--text-primary-emerald-forest);
  --text-secondary: var(--text-secondary-emerald-forest);
  --text-tertiary: color-mix(in srgb, var(--text-secondary-emerald-forest) 70%, var(--bg-content-emerald-forest));
  --text-placeholder: color-mix(in srgb, var(--text-secondary-emerald-forest) 50%, var(--bg-content-emerald-forest));
  --text-on-accent: #FFFFFF;
  --text-link: var(--accent-primary-emerald-forest);
  --border-color: var(--border-emerald-forest);
  --border-input: color-mix(in srgb, var(--border-emerald-forest) 70%, var(--bg-content-emerald-forest));
  --accent-primary: var(--accent-primary-emerald-forest);
  --accent-secondary: var(--accent-secondary-emerald-forest);
  --bg-message-user: var(--bg-message-user-emerald-forest);
  --bg-message-assistant: var(--bg-message-assistant-emerald-forest);
  --bg-message-assistant-blur: var(--bg-message-assistant-blur-emerald-forest);
  --code-bg: var(--code-bg-emerald-forest);
  --code-header-bg: var(--code-header-bg-emerald-forest);
  --modal-overlay: var(--modal-overlay-emerald-forest);
  --blur-intensity-current: var(--blur-intensity);
  --bg-image-current: none;
}

/* Custom Theme Placeholder - CSS variables will be injected by JS */
body.custom-theme-active {
  --bg-main: var(--bg-main-custom, var(--bg-main-dark));
  --bg-content: var(--bg-content-custom, var(--bg-content-dark));
  --bg-elevated: var(--bg-elevated-custom, var(--bg-elevated-dark));
  --text-primary: var(--text-primary-custom, var(--text-primary-dark));
  --text-secondary: var(--text-secondary-custom, var(--text-secondary-dark));
  --text-tertiary: var(--text-tertiary-custom, var(--text-tertiary-dark));
  --text-placeholder: var(--text-placeholder-custom, var(--text-placeholder-dark));
  --text-on-accent: var(--text-on-accent-custom, var(--text-on-accent-dark));
  --text-link: var(--text-link-custom, var(--text-link-dark));
  --border-color: var(--border-custom, var(--border-dark));
  --border-input: var(--border-input-custom, var(--border-input-dark));
  --accent-primary: var(--accent-primary-custom, var(--accent-primary-dark));
  --accent-secondary: var(--accent-secondary-custom, var(--accent-secondary-dark));
  --bg-message-user: var(--bg-message-user-custom, var(--bg-message-user-dark));
  --bg-message-assistant: var(--bg-message-assistant-custom, var(--bg-message-assistant-dark));
  --bg-message-assistant-blur: var(--bg-message-assistant-blur-custom, var(--bg-message-assistant-blur-dark));
  --bg-elevated-transparent: var(--bg-elevated-transparent-custom, var(--bg-elevated-transparent-dark));
  --code-bg: var(--code-bg-custom, var(--code-bg-dark));
  --code-header-bg: var(--code-header-bg-custom, var(--code-header-bg-dark));
  --modal-overlay: var(--modal-overlay-custom, var(--modal-overlay-dark));
  --blur-intensity-current: var(--blur-intensity);
  --bg-image-current: var(--bg-image-custom, none);
  /* RGB variants for custom themes also need to be defined here if used directly in CSS */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}


/* --- Temel Stiller & Sıfırlama --- */