/* Fontlar */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;700&family=Archivo+Black&display=swap');

:root {
    --bg: #0e0e0e;
    --accent: #ffffff;
    --text-gray: #a0a0a0;
    --border: rgba(255,255,255,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background-color: var(--bg); color: var(--accent); font-family: 'Inter', sans-serif; overflow-x: hidden; }

/* --- HEADER / NAVIGATION --- */
header.site-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 30px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent);
}

.nav-group { display: flex; gap: 35px; align-items: center; flex: 1; }
.nav-group.right { justify-content: flex-end; }

.nav-link {
    text-decoration: none;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: opacity 0.3s;
}

.nav-link:hover { opacity: 0.7; }
.nav-link.active::before { content: '- '; } /* Görseldeki gibi aktif sayfaya tire ekler */

.logo-container { flex: 0; text-align: center; }
.logo-container img { height: 50px; } /* Logon varsa buraya */
.logo-text { font-family: 'Archivo Black', sans-serif; font-size: 2rem; }

/* --- HERO SECTION --- */
.hero {
    height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    background: linear-gradient(rgba(14, 21, 37, 0.4), rgba(14, 21, 37, 0.7)), 
                url('https://images.unsplash.com/photo-1628595351029-c2bf17511435?q=80&w=2000'); /* Senin görseldeki doku */
    background-size: cover;
    background-position: center;
}

.hero h1 {
    font-family: 'Archivo Black', sans-serif;
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    line-height: 1;
    text-transform: uppercase;
    margin-bottom: 30px;
    max-width: 900px;
}

.hero p {
    font-size: 1.1rem;
    color: var(--accent);
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Scroll İndikatörü (En alttaki yuvarlak) */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    width: 50px;
    height: 50px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255,255,255,0.05);
}

.main-footer {
    background-color: #0e0e0e; 
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.05);
    width: 100%;
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
}

.copyright {
    color: #ffffff;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    opacity: 0.6;
    letter-spacing: 0.5px;
}

.privacy-link {
    color: #ffffff;
    text-decoration: none;
    font-family: 'Archivo Black', sans-serif;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.privacy-link:hover {
    opacity: 0.5;
    letter-spacing: 3px; /* Hafif bir genişleme efekti şık durur */
}

/* CONTACT SECTION */
.contact-section {
    background-color: #ffffff;
    padding: 150px 5% 100px; /* Header mesafesi için üst padding fazla */
    min-height: 80vh;
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-title {
    text-align: center;
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: 2.5rem;
    color: #000;
    margin-bottom: 60px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 10px;
}

.input-group input, 
.input-group textarea {
    border: none;
    border-bottom: 1px solid #ccc; /* Görseldeki ince alt çizgi */
    padding: 10px 0;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
    background: transparent;
}

.input-group input:focus, 
.input-group textarea:focus {
    border-bottom-color: #000; /* Odaklanınca çizgi koyulaşır */
}

.input-group textarea {
    resize: none;
}

/* Form Butonu (Görseldeki Oval Tasarım) */
.form-submit {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.send-btn {
    background: transparent;
    border: 2px solid #000;
    color: #000;
    padding: 18px 70px;
    border-radius: 40px;
    font-family: 'Inter', sans-serif;
    font-weight: 800;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.send-btn:hover {
    background-color: #000;
    color: #fff;
}

/* ABOUT - TEAM PROFILE SECTION */
.team-profile-section {
    background-color: #000000; /* Saf siyah arka plan */
    color: #ffffff;
    padding: 150px 10%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.profile-container {
    max-width: 900px;
    margin: 0 auto;
}

.profile-name {
    font-family: 'Archivo Black', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.1;
    text-transform: uppercase;
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.profile-credentials {
    margin-bottom: 40px;
}

.profile-credentials .degree {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 300;
    color: #e0e0e0;
    margin-bottom: 8px;
}

.profile-credentials .university {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 700; /* Görseldeki kalın yazı */
    color: #ffffff;
}

.profile-bio {
    font-family: 'Inter', sans-serif;
    font-size: 1.2rem;
    line-height: 1.6;
    font-style: italic; /* Görseldeki italik hava */
    color: #d1d1d1;
    margin-bottom: 60px;
    font-weight: 300;
}

.profile-email {
    margin-top: 20px;
}

.profile-email a {
    color: #ffffff;
    text-decoration: none;
    font-family: 'Archivo Black', sans-serif;
    font-size: 1rem;
    letter-spacing: 2px;
    padding-bottom: 8px;
    border-bottom: 2px solid #ffffff; /* Görseldeki kalın alt çizgi */
    transition: opacity 0.3s ease;
}

.profile-email a:hover {
    opacity: 0.7;
}

@media (max-width: 768px) {
    .team-profile-section {
        padding: 100px 5%;
    }
}

/* LIGHT MODE (Beyaz Arka Plan) AYARLARI */
.team-profile-section.light {
    background-color: #ffffff; /* Saf beyaz arka plan */
    color: #000000; /* Tüm yazılar siyah */
}

.team-profile-section.light .profile-name {
    color: #000000;
}

.team-profile-section.light .profile-credentials .degree {
    color: #555555; /* Derece yazısı biraz daha yumuşak siyah/gri */
}

.team-profile-section.light .profile-credentials .university {
    color: #000000;
    font-weight: 800;
}

.team-profile-section.light .profile-bio {
    color: #333333;
    font-weight: 400; /* Beyaz zeminde okunaklılık için normal ağırlık */
}

/* Siyah Zeminli Email Linki */
.email-black {
    color: #000000 !important;
    border-bottom: 2px solid #000000 !important;
}

.email-black:hover {
    opacity: 0.6;
}

/* Bu kısım style.css dosyasında MUTLAKA olmalı */

.team-profile-section {
    background-color: #000; /* Varsayılan siyah */
    color: #fff;
    padding: 100px 5%;
    text-align: center;
}

.team-profile-section.light {
    background-color: #fff; /* Light sınıfı varsa beyaz yap */
    color: #000;
}

.team-profile-section.light .profile-name,
.team-profile-section.light .profile-credentials .university {
    color: #000;
}

.email-black {
    color: #000 !important;
    border-bottom: 2px solid #000 !important;
}

/* --- ALTTOXAI PRODUCT PAGE STYLES --- */

/* Hero Düzenlemesi */
.product-hero {
    background-color: #ffffff;
    padding: 160px 10% 80px; /* Header mesafesi için */
    text-align: center;
    border-bottom: 1px solid #eeeeee;
}

.badge {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid #000;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 30px;
    color: #000;
}

.hero-subtitle-dark {
    font-family: 'Inter', sans-serif;
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    font-weight: 400;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.4;
}

/* İçerik Izgarası */
.content-section {
    background-color: #ffffff;
    padding: 100px 10%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.main-description {
    font-size: 1.4rem;
    color: #000;
    font-weight: 500;
}

.sub-text {
    font-size: 1.1rem;
    color: #666;
    font-weight: 300;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    padding: 40px 30px;
    border: 1px solid #eeeeee;
    background: #fdfdfd;
    text-align: center;
}

.stat-card h4 {
    font-family: 'Archivo Black', sans-serif;
    font-size: 2.5rem;
    color: #4facfe; /* Senin o canlı mavi tonun */
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    color: #888;
    letter-spacing: 1px;
}

/* Özellikler Listesi */
.features-section {
    padding: 120px 10%;
    background-color: #fcfcfc;
}

.section-title {
    font-family: 'Archivo Black', sans-serif;
    font-size: 2.2rem;
    text-align: center;
    text-transform: uppercase;
    margin-bottom: 80px;
}

.feature-item {
    border-top: 1px solid #eee;
    padding: 40px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.feature-item:last-child {
    border-bottom: 1px solid #eee;
}

.feature-title {
    font-family: 'Archivo Black', sans-serif;
    font-size: 1.3rem;
    text-transform: uppercase;
    flex: 1;
}

.feature-desc {
    flex: 2;
    color: #555;
    font-size: 1.1rem;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .content-section { grid-template-columns: 1fr; gap: 40px; }
    .feature-item { flex-direction: column; align-items: flex-start; gap: 15px; }
}