/* ==========================================================================
   PREMIUM HARDWARE / MATTE PCB PORTFOLIO - CSS 
   ========================================================================== */

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

/* Genel Ayarlar ve "Muted Light PCB" (Aydınlık Mod) Paleti */
:root {
    --bg-color: #e6e9ef; /* Göz yormayan, mat alüminyum/gümüş grisi arka plan */
    --grid-color: rgba(0, 0, 0, 0.04); /* Izgara dokusu hafifçe belirginleştirildi */
    --card-bg: #f4f6f9; /* Göz alan saf beyaz (#ffffff) yerine yumuşak kırık beyaz/gri */
    --border-color: #cbd5e1;
    --border-hover: #d97706; /* Bakır/Altın Rengi */
    --text-color: #334155; /* Metinler daha rahat okunması için bir tık koyulaştırıldı */
    --heading-color: #0f172a; 
    --accent-color: #d97706; /* ENIG Gold / Copper */
    --accent-glow: rgba(217, 119, 6, 0.15);
}

/* Karanlık Mod - "Matte Black PCB" (Kömür Siyahı ve Altın) */
[data-theme="dark"] {
    --bg-color: #0a0a0a; 
    --grid-color: rgba(255, 255, 255, 0.03);
    --card-bg: #121212; 
    --border-color: #262626;
    --border-hover: #eab308; /* Parlak Altın */
    --text-color: #9ca3af; 
    --heading-color: #ffffff; 
    --accent-color: #eab308; 
    --accent-glow: rgba(234, 179, 8, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    /* Teknik Izgara (Grid) Arka Planı */
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 30px 30px;
    
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   HEADER TASARIMI
   ========================================================================== */
header {
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at center, var(--card-bg) 0%, transparent 100%);
}

header h1 {
    font-family: 'Rajdhani', sans-serif;
    font-size: 4.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 2px;
    color: var(--heading-color);
    text-transform: uppercase;
}

header p {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 40px;
    letter-spacing: 1px;
}

/* Yetenekler (Skills) - Çip Bacakları (Pins) Görünümü */
.skills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px; 
    margin-bottom: 40px;
}

.skills span {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 6px 16px;
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
    border-radius: 4px;
    white-space: nowrap; 
    transition: all 0.3s ease;
}

.skills span:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background-color: var(--accent-glow);
    box-shadow: 0 0 10px var(--accent-glow);
}

@media (max-width: 768px) {
    header h1 { font-size: 3rem; }
    .skills { gap: 8px; }
    .skills span { padding: 4px 10px; font-size: 0.75rem; }
}

/* İletişim & Tema Butonları */
.contact-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.contact-links a, .theme-btn {
    background-color: transparent;
    color: var(--heading-color);
    text-decoration: none;
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    font-weight: 500;
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.contact-links a:hover, .theme-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Üst Menü (Sekmeler) */
.top-nav {
    margin-top: 50px;
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.top-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-family: 'Rajdhani', sans-serif;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.top-nav a:hover {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
}

/* ==========================================================================
   PROJELER BÖLÜMÜ (MAIN)
   ========================================================================== */
main {
    padding: 100px 20px;
}

main h2 {
    font-family: 'Rajdhani', sans-serif;
    text-align: center;
    margin-bottom: 70px;
    font-size: 2.5rem;
    color: var(--heading-color); 
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

main h2::after {
    content: " //";
    color: var(--accent-color);
}

main h2::before {
    content: "// ";
    color: var(--accent-color);
}

.project-grid {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

/* Kart Tasarımı - İnce Hatlı Devre Kartı Şablonu */
.project-card {
    display: flex;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.project-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 10px 30px var(--accent-glow);
    transform: translateY(-5px);
}

.project-card:nth-child(even) {
    flex-direction: row-reverse;
}

/* Görsel Alanı */
.image-placeholder {
    flex: 1;
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px; 
    border-right: 1px solid var(--border-color);
    position: relative;
}

.project-card:hover .image-placeholder {
    border-color: var(--border-hover);
}

.project-card:nth-child(even) .image-placeholder {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.image-placeholder img {
    max-width: 100%;
    max-height: 350px; 
    object-fit: contain; 
    border-radius: 4px; 
    transition: transform 0.5s ease;
}

.project-card:hover .image-placeholder img {
    transform: scale(1.02);
}

/* İçerik Kısmı */
.project-content {
    flex: 1.2;
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-content h3 {
    font-family: 'Rajdhani', sans-serif;
    color: var(--heading-color);
    margin-bottom: 15px;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.function {
    margin-bottom: 25px;
    font-size: 1rem;
    color: var(--text-color);
}

.function strong {
    color: var(--heading-color);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.features {
    list-style-type: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.features li {
    position: relative;
    padding-left: 20px;
    font-size: 0.95rem;
}

.features li::before {
    content: "+";
    color: var(--accent-color);
    font-family: 'JetBrains Mono', monospace;
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0;
}

.features li strong {
    color: var(--heading-color);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   BÜTONLAR (GITHUB VB.)
   ========================================================================== */
.card-actions {
    margin-top: 30px;
}

.github-btn {
    display: inline-flex;
    background-color: transparent;
    color: var(--heading-color);
    padding: 10px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.github-btn:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #ffffff;
    box-shadow: 0 0 15px var(--accent-glow);
}

[data-theme="dark"] .github-btn:hover {
    color: #000000; /* Koyu modda altın butonun üstündeki yazı siyah olur */
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
    text-align: center;
    padding: 40px 0;
    background-color: transparent;
    border-top: 1px solid var(--border-color);
    color: var(--text-color);
    margin-top: 60px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

/* ==========================================================================
   MOBİL UYUM (RESPONSIVE)
   ========================================================================== */
@media (max-width: 992px) {
    .project-card, 
    .project-card:nth-child(even) {
        flex-direction: column;
    }
    
    .image-placeholder,
    .project-card:nth-child(even) .image-placeholder {
        border-right: none;
        border-left: none;
        border-bottom: 1px solid var(--border-color);
        padding: 30px;
    }
    
    .project-content {
        padding: 30px;
    }
}

/* ==========================================================================
   DİL SEÇENEĞİ (LANGUAGE TOGGLE) MANTIĞI
   ========================================================================== */
body.lang-en .lang-tr { display: none; }
body.lang-tr .lang-en { display: none; }