/* Genel Stiller ve Değişkenler */
:root {
    --primary-color: #336666; /* Ana Renk - Koyu Camgöbeği/Teal */
    --secondary-color: #264c4c; /* Birincil rengin koyu tonu */
    --accent-color: #50A6A6; /* Birincil rengin daha açık, canlı bir tonu (vurgu için) */
    --background-light: #f4f7f7; /* Çok açık, hafif soğuk gri */
    --background-white: #ffffff;
    --text-dark: #2c3e50; /* Koyu Kurşuni Mavi (ana metin için) */
    --text-light: #5a6a7a; /* Orta Kurşuni Mavi (ikincil metin için) */
    --text-hero-light: #e0eaea; /* Hero bölümü alt başlığı için daha açık ton */
    --border-color: #dce4e4; /* Kenarlıklar için açık gri */

    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;

    --border-radius-sm: 5px;
    --border-radius-md: 10px;
    --box-shadow-light: 0 3px 10px rgba(0, 0, 0, 0.05);
    --box-shadow-medium: 0 6px 20px rgba(0, 0, 0, 0.08);

    --container-width: 1120px;
    --spacing-unit: 1rem; /* 16px */
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 100%; }
body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--background-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
.container { width: 90%; max-width: var(--container-width); margin: 0 auto; padding: 0 var(--spacing-unit); }
img.logo { border-radius: 0; }
a { text-decoration: none; color: var(--primary-color); transition: color 0.25s ease-in-out; }
a:hover { color: var(--secondary-color); }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-dark);
    line-height: 1.35;
    margin-bottom: calc(var(--spacing-unit) * 0.8);
    font-weight: 600;
}
h1 { font-size: clamp(2.1rem, 5vw, 3rem); margin-bottom: var(--spacing-unit); }
h2 {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    margin-bottom: calc(var(--spacing-unit) * 3);
    text-align: center;
    position: relative;
}
h2::after {
    content: ''; display: block; width: 60px; height: 3px;
    background-color: var(--accent-color);
    margin: calc(var(--spacing-unit) * 0.6) auto 0;
    border-radius: 2px;
}
h3 { font-size: clamp(1.3rem, 3vw, 1.6rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.25rem); font-weight: 500; }

p { margin-bottom: var(--spacing-unit); color: var(--text-light); font-size: 0.95rem; }

.section { padding: calc(var(--spacing-unit) * 4.5) 0; }
.section:nth-child(even) { background-color: var(--background-light); }
.section-subtitle {
    text-align: center; color: var(--text-light); font-size: 1.05rem;
    margin-top: calc(var(--spacing-unit) * -1.5);
    margin-bottom: calc(var(--spacing-unit) * 3);
    max-width: 700px; margin-left: auto; margin-right: auto;
}
.text-center { text-align: center; }
.mt-30 { margin-top: calc(var(--spacing-unit) * 1.875); }

.cta-button {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 2.2);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0.3px;
    transition: background-color 0.25s ease-in-out, transform 0.2s ease-in-out, box-shadow 0.25s ease-in-out;
    border: 1px solid transparent;
    font-family: var(--font-heading);
    font-size: 1rem;
    cursor: pointer;
    box-shadow: var(--box-shadow-light);
}
.cta-button.primary-cta {
    background-color: var(--primary-color);
    color: var(--background-white);
    border-color: var(--primary-color);
}
.cta-button.primary-cta:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(51, 102, 102, 0.3);
}
.cta-button.secondary-cta {
    background-color: transparent;
    color: var(--background-white);
    border-color: var(--background-white);
    margin-left: var(--spacing-unit);
}
.cta-button.secondary-cta:hover {
    background-color: var(--background-white);
    color: var(--primary-color);
    transform: translateY(-2px);
}
.link-arrow { font-weight: 500; color: var(--primary-color); transition: letter-spacing 0.25s ease; font-size: 0.95rem; }
.link-arrow:hover { letter-spacing: 0.3px; }


/* Header */
.site-header {
    background-color: var(--background-white);
    padding: var(--spacing-unit) 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.03);
    position: relative;
}
.site-header.sticky-header {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
    animation: slideDownHeader 0.3s ease-out;
}
@keyframes slideDownHeader { from { transform: translateY(-100%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.header-content { display: flex; justify-content: space-between; align-items: center; }
.logo-container .logo { max-height: 50px; }
.main-navigation ul { list-style: none; display: flex; }
.main-navigation li { margin-left: calc(var(--spacing-unit) * 1.75); }
.main-navigation a {
    color: var(--text-dark); font-weight: 500; font-size: 0.95rem;
    padding: calc(var(--spacing-unit) * 0.4) 0; position: relative;
}
.main-navigation a::after {
    content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
    background-color: var(--primary-color); transition: width 0.25s ease-in-out;
}
.main-navigation a:hover::after, .main-navigation a.active::after { width: 100%; }
.main-navigation a.nav-cta {
    background-color: var(--primary-color); color: var(--background-white);
    padding: calc(var(--spacing-unit) * 0.6) calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-sm); font-size: 0.9rem;
}
.main-navigation a.nav-cta:hover { background-color: var(--secondary-color); color: var(--background-white); }
.main-navigation a.nav-cta::after { display: none; }
.mobile-menu-toggle {
    display: none; background: none; border: none; font-size: 1.8rem;
    color: var(--text-dark); cursor: pointer; padding: 5px;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--background-white);
    padding: calc(var(--spacing-unit) * 7) 0;
    text-align: center;
    min-height: 60vh;
    display: flex; align-items: center; justify-content: center;
    position: relative;
}
.hero-text-content { max-width: 750px; }
.hero-section h1 {
    color: var(--background-white); font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 0.8);
}
.hero-section h1 .highlight {
    color: var(--accent-color); /* Vurgu rengi */
}
.hero-section .subtitle {
    font-size: 1.15rem;
    margin-bottom: calc(var(--spacing-unit) * 2.2);
    color: var(--text-hero-light); /* Hero alt başlığı için özel açık renk */
    font-weight: 400;
}

/* Neden Önemli (Text Section) */
.text-section {
    padding-bottom: calc(var(--spacing-unit) * 2);
}
.text-content-centered {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}
.text-content-centered p {
    font-size: 1rem;
    line-height: 1.75;
}

/* Tedavilerimiz */
.services-section-alt { background-color: var(--background-light); }
.treatment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}
.treatment-card {
    background-color: var(--background-white);
    padding: calc(var(--spacing-unit) * 1.75);
    border-radius: var(--border-radius-md);
    text-align: left;
    border: 1px solid var(--border-color);
    transition: transform 0.25s ease-in-out, box-shadow 0.25s ease-in-out, border-color 0.25s ease-in-out;
    box-shadow: var(--box-shadow-light);
}
.treatment-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-medium);
    border-color: var(--primary-color);
}
.treatment-card .card-icon {
    font-size: 1.8rem; color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 0.8);
    background-color: rgba(51, 102, 102, 0.08);
    width: 45px; height: 45px; display: inline-flex;
    align-items: center; justify-content: center; border-radius: 50%;
}
.treatment-card h3 {
    margin-bottom: calc(var(--spacing-unit) * 0.6);
    font-size: 1.2rem; font-weight: 600;
}
.treatment-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }

/* Neden Biz */
.why-us-alt { background-color: var(--background-white); }
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: calc(var(--spacing-unit) * 1.875);
    margin-top: var(--spacing-unit);
}
.feature-item {
    background-color: var(--background-light);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid transparent;
}
.feature-item .feature-icon {
    font-size: 2.2rem; color: var(--primary-color);
    margin-bottom: var(--spacing-unit);
}
.feature-item h4 { margin-bottom: calc(var(--spacing-unit) * 0.5); font-weight: 600; font-size: 1.15rem; }
.feature-item p { font-size: 0.88rem; color: var(--text-light); }

/* Hasta Yorumları */
.testimonials-section {
    background-color: var(--secondary-color); /* Ana rengin koyu tonu */
    color: var(--secondary-color);
    padding: calc(var(--spacing-unit) * 4) 0;
}
.testimonials-section h2 {
    color: var(--secondary-color); /* Başlık beyaz */
}
.testimonials-section h2::after {
    background-color: var(--secondary-color); /* Vurgu rengiyle alt çizgi */
    opacity: 0.8;
}
.testimonial-slider {
    display: grid; grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 1.875);
    max-width: 750px; margin: 0 auto;
}
@media (min-width: 768px) {
    .testimonial-slider { grid-template-columns: repeat(2, 1fr); }
}
.testimonial-item {
    background-color: rgba(255,255,255,0.05);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255,255,255,0.15);
    text-align: center;
}
.testimonial-item p {
    font-style: italic; margin-bottom: var(--spacing-unit);
    font-size: 1rem; color: #000; opacity: 0.9;
}
.testimonial-item cite {
    font-weight: 500; font-style: normal; display: block;
    opacity: 0.8; font-size: 0.9rem;
}

/* SSS */
.faq-section-alt { background-color: var(--background-light); }
.faq-grid { max-width: 780px; margin: 0 auto; }
.faq-item {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    margin-bottom: calc(var(--spacing-unit) * 0.9);
    box-shadow: none;
}
.faq-item summary {
    padding: calc(var(--spacing-unit) * 0.9) calc(var(--spacing-unit) * 1.25);
    font-weight: 500; cursor: pointer; outline: none;
    display: flex; justify-content: space-between; align-items: center;
    color: var(--text-dark); transition: background-color 0.2s ease-in-out;
    font-size: 1.05rem;
}
.faq-item summary:hover { background-color: rgba(51, 102, 102, 0.03); }
.faq-item summary::after {
    content: '+'; /* DİREKT KARAKTER */
    font-size: 1.3em; font-weight: bold;
    transition: transform 0.25s ease-in-out; color: var(--primary-color);
}
.faq-item[open] summary::after {
    content: '−'; /* DİREKT KARAKTER */
}
.faq-item[open] summary {
    background-color: rgba(51, 102, 102, 0.02);
    font-weight: 600;
}
.faq-item p {
    padding: calc(var(--spacing-unit) * 0.9) calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 1.25);
    font-size: 0.9rem; color: var(--text-light);
    background-color: var(--background-white);
    border-top: 1px solid var(--border-color);
}
.faq-item[open] p { animation: fadeInContent 0.4s ease-out; }
@keyframes fadeInContent { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* İletişim */
.contact-section-alt { background-color: var(--background-white); }
.contact-info-centered {
    text-align: center;
    max-width: 700px;
    margin: 0 auto calc(var(--spacing-unit) * 2.5) auto;
}
.contact-info-centered .contact-item {
    margin-bottom: calc(var(--spacing-unit) * 2);
}
.contact-info-centered .contact-item i {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    display: block;
}
.contact-info-centered .contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: calc(var(--spacing-unit) * 0.4);
}
.contact-info-centered .contact-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-dark);
}
.contact-link-big {
    font-size: 1.3rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: var(--spacing-unit);
}
.whatsapp-button {
    margin-top: var(--spacing-unit); /* Telefon numarasından sonra boşluk */
}
.whatsapp-button i {
    margin-right: 8px;
    font-size: 1.1em;
}
.map-container-alt {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--box-shadow-medium);
    border: 1px solid var(--border-color);
}
.map-container-alt iframe { display: block; }

/* Footer */
.site-footer-alt {
    background-color: var(--text-dark); color: #b0b0b0;
    padding: calc(var(--spacing-unit) * 3.5) 0 calc(var(--spacing-unit) * 2);
}
.footer-content {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: calc(var(--spacing-unit) * 2.5);
    margin-bottom: calc(var(--spacing-unit) * 3);
}
.footer-logo-img {
    max-height: 45px; margin-bottom: var(--spacing-unit);
    filter: brightness(0) invert(0.8);
}
.footer-logo p { font-size: 0.9rem; line-height: 1.6; color: #b0b0b0; }
.footer-links h4, .footer-contact h4 {
    color: var(--background-white); font-family: var(--font-heading);
    font-size: 1.05rem; margin-bottom: var(--spacing-unit); font-weight: 500;
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: calc(var(--spacing-unit) * 0.6); }
.footer-links a, .footer-contact p a { color: #b0b0b0; font-size: 0.9rem; }
.footer-links a:hover, .footer-contact p a:hover { color: var(--background-white); padding-left: 4px; }
.footer-contact p { font-size: 0.9rem; margin-bottom: calc(var(--spacing-unit) * 0.6); color: #b0b0b0; }
.footer-bottom {
    text-align: center; padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid #454f5b;
    font-size: 0.85rem; color: #909090;
}
.footer-bottom a { color: #b0b0b0; }
.footer-bottom a:hover { color: var(--background-white); }


/* Mobil Uyumluluk (Tablet ve Altı) */
@media (max-width: 991px) {
    .section { padding: calc(var(--spacing-unit) * 3.5) 0; }
    h2 { margin-bottom: calc(var(--spacing-unit) * 2.5); }
    .section-subtitle { margin-bottom: calc(var(--spacing-unit) * 2.5); }
}

@media (max-width: 767px) { /* Mobil */
    .main-navigation {
        display: none; position: absolute; top: 100%; left: 0; width: 100%;
        background-color: var(--background-white); box-shadow: var(--box-shadow-medium);
        padding: var(--spacing-unit) 0; border-top: 1px solid var(--border-color);
    }
    .main-navigation.active { display: block; animation: fadeInNav 0.3s ease-out; }
    @keyframes fadeInNav { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
    .main-navigation ul { flex-direction: column; align-items: flex-start; padding: 0 var(--spacing-unit); }
    .main-navigation li { margin: 0; width: 100%; }
    .main-navigation a {
        display: block; padding: calc(var(--spacing-unit) * 0.8);
        border-bottom: 1px solid var(--border-color);
    }
    .main-navigation li:last-child a { border-bottom: none; }
    .main-navigation a::after { display: none; }
    .main-navigation a.nav-cta {
        margin: var(--spacing-unit) 0 0; text-align: center; width: 100%;
        padding: calc(var(--spacing-unit) * 0.8);
    }
    .mobile-menu-toggle { display: block; }

    .hero-section { padding: calc(var(--spacing-unit) * 5) 0; min-height: 55vh; }
    .hero-section h1 { font-size: 1.9rem; }
    .hero-section .subtitle { font-size: 1.05rem; }
    .cta-button { padding: calc(var(--spacing-unit) * 0.7) calc(var(--spacing-unit) * 1.8); font-size: 0.95rem; }
    .cta-button.secondary-cta { margin-left: 0; margin-top: var(--spacing-unit); } /* Alt alta gelmesi için */


    .section { padding: calc(var(--spacing-unit) * 3) 0; }
    h2 { font-size: 1.6rem; }
    .treatment-grid, .feature-grid, .testimonial-slider { grid-template-columns: 1fr; gap: var(--spacing-unit); }
    .text-content-centered p { font-size: 0.95rem; }
    .map-container-alt iframe { height: 280px; }
    .footer-content { gap: calc(var(--spacing-unit) * 2); }
    .contact-info-centered .contact-item i { font-size: 1.6rem; }
    .contact-info-centered .contact-item h3 { font-size: 1.2rem; }
    .contact-info-centered .contact-item p { font-size: 0.95rem; }
    .contact-link-big { font-size: 1.15rem; }
}