/* =========================================
    1. GENEL AYARLAR & RENK DEĞİŞKENLERİ
    ========================================= */
:root {
    /* VARSAYILAN: AÇIK TEMA */
    --bg-color: #f8f9fa;
    --text-color: #2d3436;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --accent-color: #00b894; 
    --text-muted: #636e72;

    /* DÜZELTME: Açık temada gölgeyi tamamen kapatıyoruz, metin jilet gibi net olur */
    --accent-glow: transparent;
    --hero-glow: none; 
}

[data-theme="dark"] {
    /* KOYU TEMA */
    --bg-color: #0a0a0a;
    --text-color: #e0e0e0;
    --nav-bg: rgba(26, 26, 26, 0.9);
    --card-bg: #151515;
    --border-color: #222;
    --accent-color: #00ff88;
    --text-muted: #bbb;

    /* DÜZELTME: Koyu temada neon parlamayı geri getiriyoruz */
    --accent-glow: rgba(0, 255, 136, 0.4);
    --hero-glow: 0 0 15px var(--accent-glow);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }

body { 
    background-color: var(--bg-color); 
    color: var(--text-color); 
    overflow-x: hidden; 
    line-height: 1.6; 
    transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease; 
}

/* =========================================
    2. MASAÜSTÜ TASARIM (Bilgisayar)
    ========================================= */
.navbar { 
    display: flex; justify-content: space-between; align-items: center;
    padding: 30px 8% !important; 
    background: var(--nav-bg); backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--accent-glow); 
    position: sticky; top: 0; z-index: 1000; 
    transition: background 0.4s ease, border-bottom 0.4s ease;
}

.logo-container { display: flex; align-items: center; gap: 12px; }
.nav-logo-icon { width: 45px; height: 45px; border-radius: 50%; }

.logo-text { 
    font-size: 28px; font-weight: 800; color: var(--accent-color); 
    text-shadow: var(--hero-glow); 
    transition: 0.4s ease; 
}

.nav-links { list-style: none; display: flex; gap: 35px; position: absolute; left: 50%; transform: translateX(-50%); }
.nav-links a { color: var(--text-muted); text-decoration: none; font-weight: 500; transition: 0.3s; font-size: 1.1rem; }
.nav-links a:hover, .nav-links a.active-link { color: var(--accent-color); }

.theme-toggle-btn {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: 50px;
    width: 45px;
    height: 45px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s ease;
    z-index: 1001;
}
.theme-toggle-btn:hover {
    background: var(--accent-color);
    color: var(--bg-color);
    box-shadow: 0 0 15px var(--accent-glow);
    transform: rotate(15deg);
}

.hero { display: flex; flex-direction: column; justify-content: center; align-items: center; height: 90vh; text-align: center; }

.hero h1 { 
    font-size: 4rem; margin-bottom: 15px; 
    color: var(--accent-color) !important; 
    text-shadow: var(--hero-glow); 
    transition: 0.4s ease; 
}
.hero p { color: var(--text-color) !important; font-size: 1.1rem; transition: 0.4s ease; }

.hero .btn { 
    margin-top: 50px; padding: 16px 40px; background: var(--accent-color); color: #000; 
    text-decoration: none; font-weight: 700; border-radius: 8px; cursor: pointer; 
    border: none; transition: 0.4s ease; position: relative;
}
.hero .btn:hover { transform: translateY(-3px); box-shadow: 0 0 20px var(--accent-glow); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 25px; padding: 40px 8%; }
.project-card { 
    background: var(--card-bg); 
    padding: 30px; 
    border-radius: 15px; 
    border: 1px solid var(--border-color); 
    transition: background 0.4s ease, border 0.4s ease, transform 0.3s ease; 
}
.project-card:hover { transform: translateY(-5px); border-color: var(--accent-color); }

.tag {
    display: inline-block;
    background: var(--accent-glow);
    color: var(--accent-color);
    padding: 4px 10px;
    border-radius: 5px;
    font-size: 0.85rem;
    margin-right: 5px;
    font-weight: 600;
}

.content-section { display: none; padding: 40px 8%; min-height: 100vh; }
.content-section.active { display: block; }

footer, .footer { 
    width: 100% !important; display: flex !important; flex-direction: column !important;
    align-items: center !important; justify-content: center !important; text-align: center !important;
    padding: 50px 20px !important; background: var(--bg-color) !important; border-top: 1px solid var(--border-color) !important; clear: both;
    transition: background 0.4s ease, border-top 0.4s ease;
}
.social-links { display: flex !important; justify-content: center !important; align-items: center !important; gap: 25px !important; margin-bottom: 15px !important; width: 100% !important; }
.social-links a { color: var(--accent-color) !important; font-size: 2rem !important; text-decoration: none !important; transition: 0.3s ease; }
.social-links a:hover { transform: translateY(-5px); text-shadow: var(--hero-glow); }
footer p, .footer p { color: var(--text-muted) !important; font-size: 0.9rem !important; margin: 0 !important; width: 100% !important; text-align: center !important; }

.floating-contact { position: fixed; bottom: 30px; right: 30px; z-index: 2000; }
.contact-btn { background: var(--accent-color); color: #000; border: none; padding: 15px 25px; border-radius: 50px; cursor: pointer; font-weight: bold; box-shadow: 0 5px 15px var(--accent-glow); transition: 0.3s; }
.contact-btn:hover { transform: scale(1.05); }

.contact-popup { 
    display: none; background: var(--card-bg); padding: 25px; border-radius: 15px; 
    width: 320px; border: 1px solid var(--accent-color); margin-bottom: 15px; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.2); 
    transition: background 0.4s ease;
}
.contact-popup.show { display: block; animation: fadeInUp 0.3s ease; }
.contact-popup input, .contact-popup textarea { 
    width: 100% !important; margin-bottom: 10px; background: var(--bg-color); 
    color: var(--text-color); border: 1px solid var(--border-color); 
    padding: 10px; border-radius: 5px; outline: none; font-size: 0.9rem; 
    transition: 0.4s ease;
}
.contact-popup textarea { resize: none; height: 100px; }
.contact-popup button { width: 100%; padding: 12px; background: var(--accent-color); border: none; font-weight: bold; cursor: pointer; border-radius: 5px; color: #000; }

@media (max-width: 768px) {
    .navbar { flex-direction: column !important; padding: 20px 15px !important; gap: 15px !important; }
    .nav-links { position: static !important; transform: none !important; width: 100% !important; justify-content: center !important; background: transparent !important; border: none !important; padding: 0 !important; }
    .theme-toggle-btn { position: absolute; top: 20px; right: 20px; width: 40px; height: 40px; }
    .hero h1 { font-size: 2.2rem !important; }
    .projects-grid { grid-template-columns: 1fr !important; padding: 20px; }
    .content-section { padding-bottom: 60px !important; }
    footer, .footer { padding-bottom: 50px !important; }
    .floating-contact { bottom: 30px; right: 20px; }
    .contact-popup { width: 280px; right: 0; }
}

@keyframes fadeInUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
/* =========================================
    3. CV YÖNETİMİ & MODAL (BÜYÜTEÇ)
   ========================================= */

/* Admin panelindeki o boş kutu için özel stil */
.cv-yonetim-container {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 2px dashed var(--border-color);
    text-align: center;
    transition: 0.3s ease;
    margin-bottom: 25px;
}

.cv-yonetim-container:hover {
    border-color: var(--accent-color);
    box-shadow: var(--hero-glow);
}

/* CV Önizleme Kutusu */
.cv-preview-box {
    position: relative;
    width: 100%;
    height: 220px;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    margin-bottom: 15px;
}

.cv-preview-box iframe {
    width: 100%;
    height: 100%;
    border: none;
    pointer-events: none; /* Üzerine tıklanmasın, kutuya tıklanınca JS çalışsın */
    opacity: 0.6;
    transition: 0.3s;
}

.cv-preview-box:hover iframe {
    opacity: 0.9;
}

/* Üstündeki "Büyüt" Yazısı */
.cv-overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    pointer-events: none;
    text-shadow: 0 0 10px rgba(0,0,0,0.8);
}

/* PDF Büyüdüğünde Açılan Ekran (Modal) */
.cv-modal {
    display: none; 
    position: fixed; 
    z-index: 3000; 
    left: 0; 
    top: 0; 
    width: 100%; 
    height: 100%; 
    background-color: rgba(0,0,0,0.95);
    backdrop-filter: blur(5px);
}

.cv-modal-content {
    margin: 2% auto;
    width: 85%;
    height: 90%;
    border: 2px solid var(--accent-color);
    border-radius: 10px;
    display: block;
}

.cv-close {
    position: absolute;
    top: 15px;
    right: 25px;
    color: var(--accent-color);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.cv-close:hover {
    transform: scale(1.2);
    text-shadow: var(--hero-glow);
}

/* Güncelle butonu için ek stil (Eğer hero btn stilini kullanmak istemezsen) */
.btn-cv-update {
    display: inline-block;
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: 5px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.btn-cv-update:hover {
    background: var(--accent-color);
    color: #000;
}