/* --- RENK PALETİ VE GENEL AYARLAR --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #4f46e5; /* Derin İndigo / Mor */
    --secondary-color: #14b8a6; /* Parlak Turkuaz (Vurgu) */
    --text-dark: #1f2937; /* Koyu Gri */
    --text-light: #f9fafb;
    --bg-light: #ffffff;
    --bg-dark: #0f172a; /* Çok Koyu Arka Plan */
}

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

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-light);
    scroll-behavior: smooth;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { color: var(--text-light); }
h2 { color: var(--primary-color); }

/* --- HEADER / NAVİGASYON --- */
header {
    background-color: var(--bg-light);
    color: var(--primary-color);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 1px;
}

nav a {
    color: var(--text-dark);
    text-decoration: none;
    margin-left: 25px;
    font-weight: 600;
    transition: color 0.3s;
}

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

.cta-button {
    background-color: var(--secondary-color);
    color: var(--bg-dark) !important;
    padding: 10px 20px;
    border-radius: 50px; /* Yumuşak kenar */
    transition: opacity 0.3s;
    margin-left: 35px;
}

.cta-button:hover {
    opacity: 0.85;
}

/* --- MOBİL MENÜ --- */
.mobile-menu-btn {
    display: none; /* Masaüstünde gizle */
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

#mobile-menu {
    display: none;
    position: fixed;
    top: 65px;
    left: 0;
    width: 100%;
    background: var(--bg-dark);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    z-index: 999;
    padding: 20px 0;
    text-align: center;
}

#mobile-menu a {
    display: block;
    color: var(--text-light);
    padding: 10px 0;
    text-decoration: none;
    font-size: 1.1rem;
    border-bottom: 1px solid #334155;
}

#mobile-menu.open {
    display: block;
}

/* --- ANA BÖLÜM STİLLERİ --- */
.fullscreen-section {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 100px 5%;
    position: relative;
    overflow: hidden;
}

/* Parallax Etkisi için Arka Plan */
#hero {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.95), rgba(30, 41, 59, 0.9)), url('placeholder-hero.jpg') no-repeat center center / cover fixed;
    color: var(--text-light);
}

.hero-content {
    max-width: 800px;
}

#hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.creative-text {
    font-size: 1.4rem;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.scroll-down-btn {
    display: inline-block;
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 1.1rem;
    padding: 12px 25px;
    border: 2px solid var(--secondary-color);
    border-radius: 50px;
    transition: background-color 0.3s, color 0.3s;
}

.scroll-down-btn:hover {
    background-color: var(--secondary-color);
    color: var(--bg-dark);
}

.content-section {
    padding: 100px 10%;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.dark-section {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

.dark-section h2, .dark-section h3 {
    color: var(--secondary-color);
}

/* --- HİKAYE KARTLARI --- */
.story-cards-container {
    display: flex;
    gap: 40px;
    margin-top: 50px;
    text-align: left;
}

.story-card {
    flex: 1;
    padding: 30px;
    background: var(--bg-light);
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-top: 5px solid var(--primary-color);
}

.story-card h3 {
    color: var(--primary-color);
}

/* --- FELSEFE MANİFESTOSU --- */
.manifesto-text {
    max-width: 900px;
    margin: 40px auto;
    font-size: 1.5rem;
    line-height: 1.6;
    font-weight: 300;
    color: var(--text-light);
}

/* --- ETKİ ALANLARI GRID --- */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.impact-item {
    padding: 30px;
    border-radius: 10px;
    background-color: #f0f4f8; /* Açık gri fon */
    transition: all 0.3s;
}

.impact-item:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-5px);
}

.impact-item i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
    transition: color 0.3s;
}

.impact-item:hover i {
    color: var(--text-light);
}

/* --- İLETİŞİM FORMU --- */
.contact-section p {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

#contact-form {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}

#contact-form input, #contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
}

#contact-form button {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
    width: 100%;
}

#contact-form button:hover {
    background-color: #3b30bd;
}

#form-message {
    margin-top: 15px;
    font-weight: 600;
}

/* --- ALT BİLGİ VE SOSYAL MEDYA --- */
footer {
    text-align: center;
    padding: 30px;
    background-color: var(--bg-dark);
    color: var(--text-light);
}

.social-links a {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin: 0 10px;
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--text-light);
}

/* --- KAYDIRMA İLE GELEN ANİMASYONLAR --- */
/* Başlangıçta Görünmez */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* Görünür Olduğunda */
.fade-in-up.animate {
    opacity: 1;
    transform: translateY(0);
}

/* --- MEDYA SORGULARI (RESPONSIVE) --- */
@media (max-width: 1024px) {
    .story-cards-container {
        flex-direction: column;
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .desktop-nav {
        display: none; /* Mobil menü için masaüstü menüyü gizle */
    }

    .mobile-menu-btn {
        display: block; /* Mobil menü butonunu göster */
    }

    #hero h1 {
        font-size: 2.5rem;
    }

    .creative-text {
        font-size: 1.2rem;
    }

    .content-section {
        padding: 60px 5%;
    }

    .manifesto-text {
        font-size: 1.2rem;
    }
}