* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: #08090a;
    color: #e2e8f0;
    overflow-x: hidden;
}

/* Siyah & Neon Detaylı OFD İkonu */
.ofd-badge {
    background: #000000;
    color: #ffffff;
    font-weight: 900;
    border: 1px solid #1f242d;
    border-radius: 12px;
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.9), inset 0 0 8px rgba(255, 255, 255, 0.05);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.ofd-badge .bracket {
    color: #00d2ff;
    font-weight: 400;
    margin: 0 4px;
}

.large-badge {
    font-size: 2.2rem;
    padding: 18px 36px;
    margin-bottom: 24px;
    border: 1px solid #2d3748;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 210, 255, 0.2);
}

.nav-badge {
    font-size: 1.1rem;
    padding: 8px 16px;
}

/* Karşılama Ekranı & Katmanları */
#welcome-screen {
    position: relative;
    height: 100vh;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000000;
    overflow: hidden;
}

/* Karşılama En Arka Katman: Resim */
.full-bg-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    filter: brightness(0.35) contrast(1.1);
    pointer-events: none;
}

/* Karşılama Orta Katman: Karartma Filtresi */
.dark-tint {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1;
    pointer-events: none;
}

/* Karşılama En Ön Katman: İkon, Başlık ve Buton */
.welcome-overlay {
    position: relative;
    z-index: 10;
    text-align: center;
}

.welcome-overlay h1 {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(180deg, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-overlay p {
    color: #94a3b8;
    font-size: 1.2rem;
    margin-bottom: 35px;
}

#enter-btn {
    padding: 14px 36px;
    font-size: 1.05rem;
    font-weight: 600;
    background: #000000;
    color: #ffffff;
    border: 1px solid #334155;
    border-radius: 50px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

#enter-btn:hover {
    border-color: #00d2ff;
    box-shadow: 0 0 25px rgba(0, 210, 255, 0.3);
    transform: translateY(-2px);
}

/* Ana Bölümler & Karşılama ile Aynı Arka Plan Görseli */
.hidden {
    display: none;
}

#main-content {
    background: linear-gradient(rgba(8, 9, 10, 0.88), rgba(8, 9, 10, 0.88)), url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1920&q=80') center/cover fixed no-repeat;
    min-height: 100vh;
    width: 100%;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 10%;
    background: rgba(8, 9, 10, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #1e293b;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar nav a {
    color: #94a3b8;
    text-decoration: none;
    margin-left: 25px;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.navbar nav a:hover {
    color: #00d2ff;
}

.section {
    padding: 70px 10%;
}

.section h2 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #f8fafc;
}

/* Hakkımda Pencere Kutusu */
.about-container {
    max-width: 800px;
    margin: 0 auto;
}

.about-window {
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid #30363d;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.about-window:hover {
    border-color: #38bdf8;
}

.about-window-bar {
    background: #161b22;
    padding: 12px 18px;
    border-bottom: 1px solid #30363d;
    display: flex;
    align-items: center;
    gap: 12px;
}

.window-dots {
    display: flex;
    gap: 6px;
}

.window-dots .dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.window-dots .red { background: #ff5f56; }
.window-dots .yellow { background: #ffbd2e; }
.window-dots .green { background: #27c93f; }

.window-title {
    color: #8b949e;
    font-size: 0.85rem;
    font-family: 'Fira Code', monospace;
    display: flex;
    align-items: center;
    gap: 8px;
}

.about-content-box {
    padding: 30px;
}

.about-lead .code-tag {
    display: block;
    color: #60a5fa;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    margin: 6px 0;
    opacity: 0.7;
}

.about-lead h3 {
    font-size: 1.5rem;
    color: #f0f6fc;
    margin: 8px 0;
}

.about-lead p {
    color: #94a3b8;
    line-height: 1.7;
    font-size: 0.98rem;
    padding-left: 12px;
    border-left: 2px solid #238636;
    margin: 12px 0;
}

.about-tags-box {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #21262d;
}

.about-tags-box span {
    background: #161b22;
    border: 1px solid #30363d;
    color: #cbd5e1;
    font-size: 0.8rem;
    padding: 6px 14px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.about-tags-box span i {
    color: #38bdf8;
}

/* Beceriler */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.skill-card {
    background: rgba(15, 18, 23, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid #1e293b;
    border-radius: 12px;
    padding: 28px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.skill-card:hover {
    border-color: #38bdf8;
    transform: translateY(-4px);
}

.skill-card i,
.skill-svg-icon {
    font-size: 2.4rem;
    width: 2.4rem;
    height: 2.4rem;
    color: #38bdf8;
    margin: 0 auto 15px auto;
    display: block;
}

.skill-card h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.skill-card p {
    color: #64748b;
    font-size: 0.85rem;
}

/* Projeler */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.project-card {
    background: rgba(15, 18, 23, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid #1e293b;
    border-radius: 12px;
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.project-header i {
    font-size: 1.6rem;
    color: #38bdf8;
}

.external-link i {
    font-size: 1.1rem;
    color: #94a3b8;
    transition: color 0.2s, transform 0.2s;
}

.external-link:hover i {
    color: #00d2ff;
    transform: translate(2px, -2px);
}

.project-card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.project-card p {
    color: #94a3b8;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 20px;
}

.tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tags span {
    background: #1e293b;
    color: #38bdf8;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
}

.project-btn {
    margin-top: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: #14171f;
    color: #e2e8f0;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid #1e293b;
    border-radius: 8px;
    transition: all 0.25s ease;
}

.project-btn:hover {
    background: #000000;
    border-color: #38bdf8;
    color: #38bdf8;
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

/* İletişim / Footer */
.contact-section {
    border-top: 1px solid #1e293b;
    background: rgba(5, 6, 8, 0.95);
    padding-bottom: 30px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.contact-card {
    background: rgba(15, 18, 23, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid #1e293b;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
}

.contact-card i {
    font-size: 1.8rem;
    color: #38bdf8;
    margin-bottom: 10px;
}

.contact-card h4 {
    color: #cbd5e1;
    margin-bottom: 6px;
}

.contact-card a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.contact-card a:hover {
    color: #00d2ff;
}

.footer-bottom {
    text-align: center;
    color: #475569;
    font-size: 0.85rem;
    padding-top: 20px;
    border-top: 1px solid #111827;
}