/* ============================
   GENEL & DEĞİŞKENLER
   ============================ */

:root {
    /* Açık Tema Renkleri */
    --color-background: #FCFCFC;
    --color-surface: #FFFFFF;
    --color-text-primary: #181818;
    --color-text-secondary: #5A5A5A;
    --color-accent-primary: #D96B8A;
    --color-accent-hover: #C85A79;
    --border-color: #EAEAEA;

    /* Tipografi */
    --font-heading: 'EB Garamond', serif;
    --font-body: 'Inter', sans-serif;

    /* Diğer Değişkenler */
    --container-width: 1140px;
    --transition-speed: 0.3s;
}

:root.dark {
    /* Koyu Tema Renkleri */
    --color-background: #121212;
    --color-surface: #1E1E1E;
    --color-text-primary: #E0E0E0;
    --color-text-secondary: #A0A0A0;
    --color-accent-primary: #D96B8A;
    --color-accent-hover: #E08BA5;
    --border-color: #2D2D2D;
}

/* ============================
   TEMEL STİLLER & RESET
   ============================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
p { margin-bottom: 1rem; color: var(--color-text-secondary); }
a { color: var(--color-accent-primary); text-decoration: none; }
ul { list-style: none; }

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.subtitle {
    text-align: center;
    max-width: 600px;
    margin: -2rem auto 3rem;
    font-size: 1.1rem;
}

.cta-button {
    display: inline-block;
    background-color: var(--color-accent-primary);
    color: #FFFFFF;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
    transition: background-color var(--transition-speed);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    background-color: var(--color-accent-hover);
}

/* Resimlerin Koyu Tema Uyumu */
:root.dark img, :root.dark svg {
    filter: brightness(.85) saturate(.9);
    transition: filter var(--transition-speed);
}

/* ============================
   HEADER & NAVİGASYON
   ============================ */

.sticky-header {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: var(--color-surface);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: background-color var(--transition-speed);
    padding: 1rem 0;
}

.sticky-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-primary);
    transition: width var(--transition-speed);
}

.nav-menu a:hover::after {
    width: 100%;
}

/* Tema Değiştirme Düğmesi */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: var(--transition-speed);
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-speed);
}

input:checked +.slider {
    background-color: var(--color-accent-primary);
}

input:checked +.slider:before {
    transform: translateX(24px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* ============================
   HERO BÖLÜMÜ
   ============================ */

.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: 4rem 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
}

.hero-text.accent-text {
    color: var(--color-accent-primary);
}

.hero-text p {
    font-size: 1.2rem;
    margin: 1.5rem 0 2.5rem;
}

.hero-illustration img {
    max-width: 100%;
    height: auto;
}

/* ============================
   HİZMETLER BÖLÜMÜ (BENTO GRID)
   ============================ */

.services-section {
    padding: 5rem 0;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: 1.5rem;
}

.bento-item {
    background-color: var(--color-surface);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bento-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.07);
}

.item-large {
    grid-column: span 2;
    grid-row: span 2;
}

.bento-item h3 {
    margin-bottom: 1.5rem;
}

.bento-item ul {
    margin: 1.5rem 0;
    padding-left: 1rem;
}

.bento-item ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.bento-item ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent-primary);
}

.learn-more {
    font-weight: 500;
}

.accent-bg {
    background-color: var(--color-accent-primary);
}

.accent-bg h3,.accent-bg p {
    color: #FFFFFF;
}

/* ============================
   BOV OTORİTE MERKEZİ
   ============================ */

.authority-hub {
    padding: 5rem 0;
    background-color: var(--color-surface);
}

.blog-content {
    max-width: 800px;
    margin: 0 auto;
}

.blog-content h4 {
    margin-top: 2rem;
    font-size: 1.4rem;
}

.blog-content ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

/* ============================
   SCROLLYTELLING SÜREÇ BÖLÜMÜ
   ============================ */

.scrollytelling-section {
    padding: 6rem 0;
    position: relative;
}

.story-container {
    /* JS ile kontrol edilecek animasyonlar için placeholder */
}

.story-step {
    min-height: 80vh;
    display: flex;
    align-items: center;
    opacity: 0.2;
    transition: opacity 0.5s ease-in-out;
}

.story-step.active {
    opacity: 1;
}

/* ============================
   MÜŞTERİ YORUMLARI
   ============================ */

.testimonials-section {
    padding: 5rem 0;
    background-color: var(--color-surface);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.testimonial-card {
    background-color: var(--color-background);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--color-accent-primary);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 1rem;
}

.testimonial-card cite {
    font-weight: 700;
    color: var(--color-text-primary);
}


/* ============================
   İLETİŞİM BÖLÜMÜ
   ============================ */

.contact-section {
    padding: 5rem 0;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-family: var(--font-body);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-secondary);
}

/* ============================
   FOOTER
   ============================ */

.footer-section {
    background-color: var(--color-surface);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--color-text-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--color-text-secondary);
}

/* ============================
   DUYARLILIK (RESPONSIVE)
   ============================ */

@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
   .hero-content { grid-template-columns: 1fr; text-align: center; }
   .hero-illustration { display: none; }
   .bento-grid { grid-template-columns: 1fr; }
   .item-large { grid-column: span 1; grid-row: span 1; }
   .testimonial-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
   .nav-menu { display: none; /* Mobil menü için JS ile toggle edilecek */}
    h1 { font-size: 2.2rem; }
    h2 { font-size: 2rem; }
   .footer-content { grid-template-columns: 1fr; text-align: center; }
}