/* ========================================
   CSS Reset ve Temel Ayarlar
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 18px;
    line-height: 1.6;
    color: #495057;
    background-color: #FFFFFF;
    overflow-x: hidden;
}

/* ========================================
   Tipografi
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: #1E1E1E;
    line-height: 1.2;
}

h1 {
    font-size: 56px;
}

h2 {
    font-size: 42px;
}

h3 {
    font-size: 24px;
    font-weight: 600;
}

p {
    margin-bottom: 16px;
}

/* ========================================
   Container ve Layout
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header - Sticky Navigation
   ======================================== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

#header.scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #BB1730 0%, #E85A70 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 24px;
    font-weight: 700;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #BB1730;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 8px;
    margin-left: 24px;
}

.lang-btn {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid #E9ECEF;
    border-radius: 6px;
    background-color: #FFFFFF;
    color: #495057;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    border-color: #BB1730;
    color: #BB1730;
}

.lang-btn.active {
    background-color: #BB1730;
    color: #FFFFFF;
    border-color: #BB1730;
}

#nav ul {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-link {
    font-size: 16px;
    font-weight: 500;
    color: #495057;
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #BB1730;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #BB1730;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: #BB1730;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 999;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu ul {
    list-style: none;
    padding: 24px;
}

.mobile-menu ul li {
    margin-bottom: 16px;
}

.mobile-nav-link {
    font-size: 18px;
    font-weight: 500;
    color: #495057;
    text-decoration: none;
    display: block;
    padding: 12px 0;
    transition: color 0.3s ease;
}

.mobile-nav-link:hover {
    color: #BB1730;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: #BB1730;
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(187, 23, 48, 0.2);
}

.btn-primary:hover {
    background-color: #E85A70;
    box-shadow: 0 6px 16px rgba(187, 23, 48, 0.3);
    transform: translateY(-2px);
}

.btn-large {
    padding: 20px 40px;
    font-size: 18px;
}

/* ========================================
   Hero Section - Başlık Bölümü
   ======================================== */
.hero-section {
    /* solid fallback */
    background-color: #0F4C81;
    /* kırmızı → mavi → çok açık mavi */
    background: linear-gradient(
        135deg,
        #BB1730 0%,
        #0F4C81 55%,
        #E9F1F7 100%
    );
   
    padding: 160px 0 96px;
    margin-top: 80px;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    color: #FFFFFF;
    margin-bottom: 24px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 20px;
    color: #FFFFFF;
    margin-bottom: 32px;
    line-height: 1.6;
}

/* ========================================
   Hero Info Section
   ======================================== */
.hero-info-section {
    padding: 96px 0;
    background-color: #F8F9FA;
}

.hero-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-info-left h2 {
    margin-bottom: 24px;
}

.hero-info-left p {
    font-size: 18px;
    margin-bottom: 16px;
}

.gradient-card {
    background: linear-gradient(135deg, #BB1730 0%, #E85A70 100%);
    padding: 32px;
    border-radius: 16px;
    color: #FFFFFF;
    box-shadow: 0 8px 24px rgba(187, 23, 48, 0.2);
}

.gradient-card p {
    font-size: 18px;
    margin-bottom: 0;
    color: #FFFFFF;
}

/* ========================================
   Problems Section - Sorun Bölümü
   ======================================== */
.problems-section {
    padding: 96px 0;
    background-color: #FFFFFF;
}

.section-title {
    text-align: center;
    margin-bottom: 64px;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.problem-card {
    background-color: #FFFFFF;
    padding: 32px;
    border-radius: 16px;
    border: 1px solid #E9ECEF;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.problem-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #BB1730 0%, #E85A70 100%);
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.problem-card h3 {
    margin-bottom: 16px;
}

.problem-card p {
    margin-bottom: 0;
}

/* ========================================
   Solution Section - Çözüm Bölümü
   ======================================== */
.solution-section {
    padding: 96px 0;
    background-color: #F8F9FA;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 64px;
}

.subsection-title {
    text-align: center;
    margin: 48px 0 16px;
}

.subsection-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 48px;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.solution-card {
    background-color: #FFFFFF;
    padding: 32px;
    border-radius: 16px;
    border: 1px solid #E9ECEF;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: center;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.solution-number {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #BB1730 0%, #E85A70 100%);
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 24px;
}

.solution-card h3 {
    margin-bottom: 16px;
}

.solution-card p {
    margin-bottom: 0;
}

/* ========================================
   Comparison Section - Karşılaştırma
   ======================================== */
.comparison-section {
    padding: 96px 0;
    background-color: #FFFFFF;
}

.table-wrapper {
    overflow-x: auto;
    margin-top: 48px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #FFFFFF;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    overflow: hidden;
}

.comparison-table thead {
    background-color: #BB1730;
    color: #FFFFFF;
}

.comparison-table th {
    padding: 20px;
    text-align: left;
    font-weight: 600;
    font-size: 16px;
}

.comparison-table td {
    padding: 20px;
    border-bottom: 1px solid #E9ECEF;
}

.comparison-table tbody tr:nth-child(even) {
    background-color: #F8F9FA;
}

.comparison-table tbody tr:hover {
    background-color: #FDE6EA;
}

.vipera-col {
    background-color: #BB1730;
    color: #FFFFFF;
    font-weight: 600;
}

.comparison-table tbody .vipera-col {
    background-color: #FDE6EA;
    color: #BB1730;
}

/* ========================================
   FAQ Section - S/S
   ======================================== */
.faq-section {
    padding: 96px 0;
    background-color: #F8F9FA;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: #FFFFFF;
    border: 1px solid #E9ECEF;
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 18px;
    font-weight: 600;
    color: #1E1E1E;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #F8F9FA;
}

.faq-question[aria-expanded="true"] {
    background-color: #F8F9FA;
}

.faq-icon {
    font-size: 28px;
    font-weight: 300;
    color: #BB1730;
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-answer.active {
    max-height: 500px;
    padding: 0 24px 24px;
}

.faq-answer p {
    margin-bottom: 0;
}

/* ========================================
   Testimonials Section - Müşteri Yorumları
   ======================================== */
.testimonials-section {
    padding: 96px 0;
    background-color: #FFFFFF;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.testimonial-card {
    background-color: #FFFFFF;
    padding: 32px;
    border-radius: 16px;
    border: 1px solid #E9ECEF;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 24px;
    border: 3px solid #EFA3B1;
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-text {
    font-style: italic;
    color: #495057;
    margin-bottom: 24px;
    font-size: 16px;
}

.testimonial-author {
    font-weight: 600;
    color: #1E1E1E;
    margin-bottom: 4px;
}

.testimonial-title {
    font-size: 14px;
    color: #BB1730;
    margin-bottom: 0;
}

/* ========================================
   Final CTA Section
   ======================================== */
.final-cta-section {
    padding: 96px 0;
    background: linear-gradient(135deg, #BB1730 0%, #E85A70 100%);
    text-align: center;
}

.final-cta-content h2 {
    color: #FFFFFF;
    margin-bottom: 24px;
}

.final-cta-content p {
    color: #FFFFFF;
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 32px;
}

.final-cta-section .btn-primary {
    background-color: #FFFFFF;
    color: #BB1730;
}

.final-cta-section .btn-primary:hover {
    background-color: #FDE6EA;
    color: #BB1730;
}

/* ========================================
   Placeholder Sections
   ======================================== */
.placeholder-section {
    padding: 96px 0;
    background-color: #F8F9FA;
}

.placeholder-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 64px 32px;
    background-color: #FFFFFF;
    border-radius: 16px;
    border: 2px dashed #E9ECEF;
}

.placeholder-content p {
    font-size: 18px;
    color: #495057;
    margin-bottom: 0;
}

/* ========================================
   Contact Section - İletişim
   ======================================== */
.contact-section {
    padding: 96px 0;
    background-color: #FFFFFF;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-content > p {
    text-align: center;
    margin-bottom: 48px;
}

.contact-form {
    background-color: #F8F9FA;
    padding: 48px;
    border-radius: 16px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #1E1E1E;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #E9ECEF;
    border-radius: 8px;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #BB1730;
}

.contact-form .btn {
    width: 100%;
}

/* ========================================
   Footer
   ======================================== */
#footer {
    background-color: #1E1E1E;
    padding: 48px 0;
    text-align: center;
}

.footer-content {
    color: #FFFFFF;
}

.footer-brand {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #EFA3B1;
}

.footer-copyright {
    font-size: 14px;
    color: #FFFFFF;
    margin-bottom: 0;
    opacity: 0.8;
}

/* ========================================
   Responsive Design - Mobile
   ======================================== */
@media (max-width: 992px) {
    h1 {
        font-size: 42px;
    }

    h2 {
        font-size: 36px;
    }

    .hero-info-grid {
        grid-template-columns: 1fr;
    }

    .solution-grid {
        grid-template-columns: 1fr;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 32px;
    }

    #nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .hero-section {
        padding: 120px 0 64px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .problems-grid {
        grid-template-columns: 1fr;
    }

    .solution-grid {
        grid-template-columns: 1fr;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .comparison-table {
        font-size: 14px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px;
    }

    .contact-form {
        padding: 32px 24px;
    }
}

/* ========================================
   Focus Visible for Accessibility
   ======================================== */
*:focus-visible {
    outline: 2px solid #BB1730;
    outline-offset: 2px;
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-32 {
    margin-top: 32px;
}
/* Logo image sizing */
.logo-img {
  height: 32px;
  width: auto;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}
@media (min-width: 768px) {
  .logo-img { height: 60px; }
}
/* Footer & table logos */
.footer-logo {
  height: 22px;
  width: auto;
  vertical-align: middle;
  margin-right: 8px;
}
.comparison-table th .table-logo {
  height: 18px;
  width: auto;
  vertical-align: middle;
  margin-right: 6px;
}