@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Permanent+Marker&display=swap');

:root {
    --bg-color: #fdfbf7;
    --black: #111111;
    --border-width: 3px;
    --shadow-offset: 6px;
    
    --color-yks: #fef08a; 
    --color-kpss: #bbf7d0; 
    --color-dgs: #fbcfe8; 
    --color-hesapla: #bae6fd; 
    --color-pomodoro: #fca5a5; 
}

/* Temel Ayarlar */
body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--bg-color);
    color: var(--black);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    overflow-x: hidden; /* Taşmaları engellemek için */
    
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Üst Menü */
.navbar-custom {
    background-color: #ffffff;
    border-bottom: var(--border-width) solid var(--black);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.brand-text {
    font-family: 'Permanent Marker', cursive;
    font-size: 2.2rem;
    color: var(--black) !important;
    text-decoration: none;
    letter-spacing: 2px;
}

/* Navigasyon */
.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item { position: relative; }

.nav-link-custom {
    color: var(--black);
    text-decoration: none;
    font-weight: 700;
    padding: 0.5rem 1rem;
    border: 2px solid var(--black);
    box-shadow: 2px 2px 0px var(--black);
    background-color: #ffffff;
    border-radius: 6px;
    transition: all 0.15s ease-out;
    text-transform: uppercase;
    font-size: 0.95rem;
    display: inline-block;
}

.nav-link-custom:hover {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--black);
    background-color: #f3f4f6;
}

.btn-pomodoro {
    background-color: var(--color-pomodoro);
    border: 2px solid var(--black);
    box-shadow: 2px 2px 0px var(--black);
}

.btn-pomodoro:hover {
    background-color: #ef4444;
    color: #ffffff;
}

/* Açılır Menü */
.dropdown-menu-custom {
    position: absolute;
    top: 150%;
    left: 0;
    background-color: #ffffff;
    border: var(--border-width) solid var(--black);
    box-shadow: 4px 4px 0px var(--black);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1040;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.nav-item:hover .dropdown-menu-custom {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    top: 100%;
}

.dropdown-menu-custom a {
    padding: 1rem 1.5rem;
    color: var(--black);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid var(--black);
    text-transform: uppercase;
    font-size: 0.9rem;
}

.dropdown-menu-custom a:last-child { border-bottom: none; }
.dropdown-menu-custom a:hover { background-color: var(--color-kpss); }

/* Tipografi */
.welcome-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--black);
    text-align: center;
    margin-top: 4rem;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.welcome-subtitle {
    text-align: center;
    color: var(--black);
    margin-bottom: 2rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.section-heading-full {
    display: block;
    width: 100%;
    border-bottom: 4px solid var(--black);
    margin-top: 3rem;
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    font-weight: 800;
    font-size: 1.8rem;
    text-transform: uppercase;
    color: var(--black);
}

/* Kart Düzeni */
.box-grid {
    display: grid;
    /* Mobil uyumluluk için minmax */
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.category-box {
    background-color: #ffffff;
    border: var(--border-width) solid var(--black);
    border-radius: 8px;
    padding: 2.5rem 2rem;
    text-decoration: none;
    color: var(--black);
    transition: transform 0.15s ease-out, box-shadow 0.15s ease-out;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px 0px var(--black);
    display: block;
}

.category-box:hover {
    transform: translate(3px, 3px);
    box-shadow: 3px 3px 0px 0px var(--black);
    color: var(--black);
}

.category-box:active {
    transform: translate(6px, 6px);
    box-shadow: 0px 0px 0px 0px var(--black);
}

.box-kpss { background-color: var(--color-kpss); }
.box-yks { background-color: var(--color-yks); }
.box-dgs { background-color: var(--color-dgs); }
.box-hesapla { background-color: var(--color-hesapla); }
.box-pomodoro { background-color: var(--color-pomodoro); }

.box-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.box-desc {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.4;
    margin: 0;
    color: var(--black);
}

/* Yatay Reklam Alanı (Mobil Uyumlu) */
.ads-area-horizontal {
    min-height: 110px;
    width: 100%;
    max-width: 728px; /* Taşan ekranları engeller */
    margin: 0 auto 3rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-weight: 700;
    text-transform: uppercase;
    color: #888;
    border-radius: 8px;
}

/* Dikey Reklam Alanı (Yan Sütunlar için) */
.ads-area-vertical {
    min-height: 600px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-weight: 700;
    text-transform: uppercase;
    color: #888;
    border-radius: 8px;
    margin-bottom: 2rem;
}

/* Mobil Cihazlar İçin Responsive  */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 2.2rem;
        margin-top: 2rem;
    }
    .welcome-subtitle {
        font-size: 1rem;
    }
    .section-heading-full {
        font-size: 1.5rem;
        margin-top: 2rem;
    }
    .box-title {
        font-size: 1.5rem;
    }
    .category-box {
        padding: 1.5rem;
    }
    .ads-area-horizontal {
        min-height: 50px;
    }
}

.mobile-nav-link {
    display: block;
    padding: 0.7rem 1rem;
    border: 2px solid var(--black);
    box-shadow: 2px 2px 0px var(--black);
    border-radius: 6px;
    text-decoration: none;
    color: var(--black);
    font-weight: 700;
    font-size: 0.95rem;
    text-transform: uppercase;
    transition: transform 0.1s, box-shadow 0.1s;
}

.mobile-nav-link:hover {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--black);
    color: var(--black);
}