:root {
    /* Temel renkler (Neon ve Yüksek Doygunluk) */
    --primary-color: #ff005c;     /* Elektrik Pembe/Kızıl - Aksiyon vurgusu, Kritik */
    --secondary-color: #00ffff;   /* Saf Siyan/Elektrik Mavi - Butonlar, Linkler, Interaktif */
    --accent-color: #ffff00;      /* Parlak Saf Sarı - Hover, Vurgu, Bildirimler */

    /* Arka plan ve metin (Koyu Tema Kontrastı) */
    --background-color: #0d0d0d;  /* Neredeyse Saf Siyah (Neon renkleri patlatmak için) */
    --surface-color: #1a1a1a;     /* Kartlar, Container arka plan (Çok Koyu Gri) */
    --text-color: #f0f0f0;         /* Yumuşak Beyaz Ana Metin */
    --subtext-color: #a9a9a9;      /* Alt metin, açıklamalar */

    /* Buton ve interaktif öğeler */
    --button-bg: var(--secondary-color);
    --button-text: #0d0d0d;      /* Buton üzerinde koyu metin (Yüksek Kontrast) */
    --button-hover-bg: var(--accent-color);

    /* Footer ve header */
    --header-bg: #141414;
    --footer-bg: #141414;
}



* {
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
}

/* HEADER START */
header {
    height: 70px;
    background-color: var(--header-bg);
    text-align: center;
    align-content: center;
}
.sayfa-baslik {
    color: var(--subtext-color);
    text-decoration: none;
    transition: 0.5s;
}
.sayfa-baslik:hover {
    color: var(--secondary-color);
}
/* HEADER STOP */

/* MAİN START */

.info-div {
    background-color: var(--surface-color);
    display: flex;
    margin: 8px 32px;
    padding: 12px 24px;
    border-radius: 12px;
    justify-content: space-between;
    align-items: center;
}
.game-info {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-direction: row;
}
.game-info-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}
.info-links a {
    text-decoration: none;
    background-color: var(--button-bg);
    padding: 6px;
    font-size: 16px;
    border-radius: 6px;
    color: white;
    transition: 0.3s;
}
.info-links a:hover {
    background-color: var(--button-hover-bg);
}
.oyunlar {
    background-color: var(--surface-color);
    display: flex;
    margin: 0px 32px 32px 32px;
    padding: 24px;
    border-radius: 12px;
    justify-content: space-evenly;
    flex-wrap: wrap;
}
.oyun-item {
    background-color: var(--subtext-color);
    margin: 8px;
    text-align: center;
    transition: 0.7s;
    padding: 6px;
    border-radius: 6px;
}
.oyun-item:hover {
    background-color: var(--button-hover-bg);
    border-radius: 12px;
}
.oyun-item a {
    color: var(--surface-color);
    text-decoration: none;
    font-size: 12px;
}

.oyun-item img {
    height: 100px;
    width: 100px;
    border-radius: 8px;
}
.game-div {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lesson-container {
    display: flex;
    justify-content: center; /* yatay ortalama */
    align-items: center;     /* dikey ortalama */
    padding: 20px;
}

.lesson-iframe {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 8px;
    border: 1px var(--primary-color) solid;
}
.lesson-iframe {
    image-rendering: optimizeSpeed; /* hızlı render */
    backface-visibility: hidden;    /* tarayıcı optimizasyonu */
    transform: translateZ(0);       /* GPU acceleration */
}

.butonlar {
    background-color: var(--surface-color);
    width: 40%;
    display: flex;
    justify-content: space-between;
    padding: 12px 16px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.geriDonBtn,
.tamEkranBtn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    padding: 10px 16px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.3s, box-shadow 0.3s;
    text-decoration: none;
}

.geriDonBtn {
    background-color: var(--primary-color);
    color: var(--text-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.geriDonBtn:hover {
    background-color: var(--surface-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.5);
}

.tamEkranBtn {
    background-color: var(--subtext-color);
    color: var(--text-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.tamEkranBtn:hover {
    background-color: var(--surface-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.5);
}

/* OYUNLAR STOP */

/* FOOTER START */
footer {
    position: relative;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--footer-bg);
    text-align: center;
    height: 32px;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    margin-top: 12px;
}
footer p a {
    text-decoration: none;
    color: var(--text-color);
}

/* FOOTER STOP */