/* ======================================= */
/* 1. CSS Değişkenleri (Theme System) */
/* ======================================= */

:root {
    /* DEFAULT THEME: DARK (Cyberpunk) */
    --clr-bg: #140b1e; /* Koyu Mor/Siyah */
    --clr-text: #e0e0e0;
    --clr-primary: #8a2be2; /* Koyu Mor Aksan */
    --clr-secondary: #00d0ff; /* Elektrik Mavi Aksan */
    --clr-accent: #ff00ff; /* Neon Fuşya/Mor */
    --clr-sap-subtle: rgba(0, 112, 173, 0.2); /* SAP Mavisinin Hafif Hali */
    --clr-border: #331a4a;
    --clr-card-bg: #1e132c;
    --shadow-neon: 0 0 8px var(--clr-accent);
}

/* LIGHT MODE OVERRIDES (SAP Professional Theme) */
.light-mode {
    --clr-bg: #f5f7fa; /* Çok Açık Gri/Beyaz */
    --clr-text: #333333;
    --clr-primary: #0070ad; /* SAP Mavisi */
    --clr-secondary: #1e3f66; /* Koyu Mavi/Gri */
    --clr-accent: #ff8c00; /* Turuncu Vurgu */
    --clr-sap-subtle: rgba(0, 112, 173, 0.1);
    --clr-border: #cccccc;
    --clr-card-bg: #ffffff;
    --shadow-neon: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ======================================= */
/* 2. Genel Stil ve Tipografi */
/* ======================================= */

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

body {
    font-family: 'Roboto Mono', monospace;
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    transition: background-color 0.5s ease, color 0.5s ease;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Orbitron', sans-serif;
    color: var(--clr-secondary);
    margin-bottom: 20px;
}

a {
    color: var(--clr-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--clr-secondary);
}

/* Neon Efekti */
.neon-text {
    color: var(--clr-accent);
    text-shadow: 0 0 5px var(--clr-accent), 0 0 10px var(--clr-accent);
}

.neon-accent-icon {
    font-size: 1.5em;
    filter: drop-shadow(0 0 3px var(--clr-accent));
}

/* ======================================= */
/* 3. Navigasyon Çubuğu */
/* ======================================= */

#navbar {
    background-color: var(--clr-card-bg);
    border-bottom: 1px solid var(--clr-border);
    padding: 15px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.logo {
    font-size: 1.2em;
    font-weight: bold;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
}

.nav-links li a {
    color: var(--clr-text);
    padding: 10px 15px;
    margin-left: 5px;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.nav-links li a:hover {
    color: var(--clr-accent);
    border-bottom-color: var(--clr-accent);
}

/* Toggle Butonları */
.toggle-container {
    margin-left: 20px;
}

.toggle-container button {
    background: none;
    border: 1px solid var(--clr-border);
    color: var(--clr-text);
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-family: 'Roboto Mono', monospace;
    transition: all 0.3s ease;
}

.toggle-container button:hover {
    background-color: var(--clr-primary);
    color: white;
    box-shadow: var(--shadow-neon);
}

/* ======================================= */
/* 4. Hero Section (Cyberpunk Command Center) */
/* ======================================= */

#tsparticles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-section {
    min-height: 90vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.hero-content {
    z-index: 1;
    max-width: 800px;
    padding: 20px;
}

.profile-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--clr-accent);
    object-fit: cover;
    margin-bottom: 20px;
    box-shadow: var(--shadow-neon);
    transition: all 0.5s ease;
}

.data-stream {
    color: var(--clr-secondary);
    font-size: 1.1em;
    margin-top: 15px;
    opacity: 0.8;
}

.social-links a {
    margin: 0 15px;
    font-size: 1.8em;
    display: inline-block;
    margin-top: 30px;
}

/* ======================================= */
/* 5. Main İçerik ve Responsive Tasarım */
/* ======================================= */

main {
    padding: 50px 5%;
}

section {
    margin-bottom: 80px;
    padding: 40px;
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border);
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
    transition: background-color 0.5s ease, border-color 0.5s ease;
}

/* Mobile ve Tablet için Responsive Ayarlar */
@media (max-width: 768px) {
    #navbar {
        flex-direction: column;
        padding: 10px 5%;
    }
    .nav-links {
        margin-top: 10px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .nav-links li {
        margin: 5px;
    }
    .hero-content {
        padding-top: 100px; /* Navbar kaybolduysa boşluk bırak */
    }
}

/* style.css (EKLENEN BÖLÜMLER) */

/* ======================================= */
/* 6. Projeler Bölümü (Level Unlock Estetiği) */
/* ======================================= */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.project-card {
    background-color: var(--clr-card-bg);
    padding: 25px;
    border-radius: 8px;
    border: 2px solid var(--clr-border);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--clr-accent);
    box-shadow: var(--shadow-neon);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.level-indicator {
    color: var(--clr-accent);
    background-color: var(--clr-primary);
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 0.8em;
    font-family: 'Roboto Mono', monospace;
}

.project-sector {
    font-size: 0.9em;
    color: var(--clr-secondary);
    margin-bottom: 15px;
}

/* İlerleme Çubuğu */
.progress-bar-container {
    width: 100%;
    height: 10px;
    background-color: var(--clr-border);
    border-radius: 5px;
    overflow: hidden;
    margin-top: 10px;
}

.progress-bar {
    height: 100%;
    background-color: var(--clr-secondary);
    transition: width 0.5s ease;
    filter: brightness(1.5);
}

.progress-text {
    font-size: 0.75em;
    color: var(--clr-text);
    margin-top: 5px;
    display: block;
    text-align: right;
}

/* Kilit Açma Overlay Efekti */

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 0.3s ease;
    opacity: 1;
}

/* Kilitli durum */
.project-card.locked .card-overlay {
    opacity: 1;
}

/* Mouse ile üzerine gelindiğinde kilit açma animasyonu */
.project-card:not(.unlocked):hover .card-overlay {
    opacity: 0.1; /* Hafif saydamlık, alttaki kart görünür */
}

/* Tıklandıktan sonra kilidin tamamen kalkması */
.project-card.unlocked .card-overlay {
    display: none;
}

.unlock-icon {
    font-size: 3em;
    color: var(--clr-accent);
    filter: drop-shadow(0 0 5px var(--clr-accent));
    margin-bottom: 10px;
}

.unlock-text {
    font-family: 'Roboto Mono', monospace;
    color: var(--clr-accent);
    text-shadow: 0 0 2px var(--clr-accent);
}


/* ======================================= */
/* 7. Modal Stilleri */
/* ======================================= */
.modal {
    display: none; /* Varsayılan olarak gizli */
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9); /* Siyah, yarı saydam arka plan */
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--clr-card-bg);
    margin: auto;
    padding: 30px;
    border: 3px solid var(--clr-accent);
    width: 80%;
    max-width: 900px;
    border-radius: 10px;
    box-shadow: var(--shadow-neon);
    position: relative;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9);}
    to { opacity: 1; transform: scale(1);}
}

.close-button {
    color: var(--clr-accent);
    float: right;
    font-size: 36px;
    font-weight: bold;
    transition: color 0.3s;
}

.close-button:hover,
.close-button:focus {
    color: white;
    text-decoration: none;
    cursor: pointer;
}

#modal-video-container {
    margin-top: 20px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 56.25%; /* 16:9 oranı */
    height: 0;
    overflow: hidden;
}

#modal-video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 1px solid var(--clr-secondary);
}