/* 
 * SerMimar Hazır Sera - Master CSS (main.css)
 * %100 Lokal, Sıfır CDN, Ultra Hızlı
 */

:root {
    --primary: #1A3C5E;
    --primary-hover: #122B44;
    --accent: #E8A020;
    --accent-hover: #D18D15;
    --whatsapp: #25D366;
    --whatsapp-hover: #1EBE57;
    --dark: #0F172A;
    --light: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-600: #475569;
    --gray-800: #1E293B;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--light);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Tipografi */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 0.75rem;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }

p { margin-bottom: 1rem; color: var(--gray-600); }
a { color: var(--primary); text-decoration: none; transition: all 0.2s ease; }
a:hover { color: var(--accent); }

/* Layout & Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.container-narrow {
    width: 100%;
    max-width: 950px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.section-padding {
    padding: 3.5rem 0;
}

.bg-gray {
    background-color: var(--gray-100);
}

/* Off-Canvas Mobil Menü (rules.md F-23 Uyumlu) */
.offcanvas-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    z-index: 99999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.offcanvas-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 85%;
    max-width: 340px;
    height: 100vh;
    background: #ffffff;
    z-index: 100000;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -5px 0 25px rgba(0,0,0,0.2);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    overflow-y: auto;
}

.offcanvas-menu.active {
    transform: translateX(0);
}

.offcanvas-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Sabit Butonlar (rules.md F-24, F-25 Uyumlu) */
.floating-btn-scroll {
    position: fixed;
    bottom: 24px;
    left: 20px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 990;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.floating-btn-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.floating-btn-scroll:hover {
    background-color: var(--accent);
}

.floating-btn-whatsapp {
    position: fixed;
    bottom: 24px;
    right: 20px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background-color: var(--whatsapp);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 990;
    transition: transform 0.2s ease, background-color 0.2s ease;
    animation: pulse 2s infinite;
}

.floating-btn-whatsapp:hover {
    background-color: var(--whatsapp-hover);
    transform: scale(1.08);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* Header & Navbar */
.header-top {
    background-color: var(--primary);
    color: #ffffff;
    font-size: 0.85rem;
    padding: 0.5rem 0;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.navbar {
    background: #ffffff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 900;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 75px;
    flex-wrap: nowrap;
}

.logo-brand {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    white-space: nowrap;
}

.logo-brand span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: clamp(0.4rem, 1vw, 1.1rem);
    align-items: center;
    list-style: none;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.nav-links li {
    flex-shrink: 0;
    white-space: nowrap;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--gray-800);
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--primary);
}

.hamburger-toggle {
    display: none;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--primary);
    transition: all 0.2s ease;
    align-items: center;
    justify-content: center;
}

.hamburger-toggle:hover {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.bg-white {
    background-color: #ffffff;
}

/* Grid & Kartlar */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

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

.card {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Hizmet Bölgesi Özel Kart & Pill Stilleri */
.location-item {
    transition: all 0.2s ease;
    border-radius: 6px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.location-item:hover {
    background-color: var(--primary) !important;
    color: #ffffff !important;
    border-color: var(--primary) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.location-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
}

.btn-secondary {
    background-color: var(--gray-100);
    color: var(--primary);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.btn-accent {
    background-color: var(--accent);
    color: #ffffff;
}

.btn-accent:hover {
    background-color: var(--accent-hover);
    color: #ffffff;
}

.btn-whatsapp {
    background-color: var(--whatsapp);
    color: #ffffff;
}

.btn-whatsapp:hover {
    background-color: var(--whatsapp-hover);
    color: #ffffff;
}

/* SSS Accordion */
.faq-accordion {
    margin-top: 1.5rem;
}

.faq-item {
    background: #ffffff;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 1.25rem 1.25rem 1.25rem;
    display: none;
    color: var(--gray-600);
}

.faq-item.active .faq-answer {
    display: block;
}

/* Responsive */
@media (max-width: 1100px) {
    .nav-links { display: none !important; }
    .hamburger-toggle { display: inline-flex !important; }
}

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.4rem; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 576px) {
    .grid-4, .grid-3 { grid-template-columns: 1fr; }
}

/* Kategori Gruplama & Filtre Stilleri */
.category-filter-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.25rem;
}

.category-filter-btn {
    background: #ffffff;
    border: 1px solid var(--gray-300);
    color: var(--gray-800);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.category-filter-btn:hover,
.category-filter-btn.active {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 4px 10px rgba(26, 60, 94, 0.2);
}

.category-filter-btn .badge-count {
    background: var(--gray-200);
    color: var(--gray-800);
    font-size: 0.75rem;
    padding: 0.15rem 0.45rem;
    border-radius: 12px;
    font-weight: 700;
    transition: all 0.2s ease;
}

.category-filter-btn:hover .badge-count,
.category-filter-btn.active .badge-count {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.category-group-header {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--gray-200);
    border-left: 5px solid var(--primary);
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
}

@media (max-width: 768px) {
    .category-group-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

.category-card-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    margin-bottom: 0.75rem;
    width: fit-content;
}

.tag-urun { background: #E0F2FE; color: #0369A1; }
.tag-kullanim { background: #DCFCE7; color: #15803D; }
.tag-iklim { background: #FEF3C7; color: #B45309; }
.tag-sistem { background: #F3E8FF; color: #6B21A8; }
.tag-kaplama { background: #FCE7F3; color: #BE185D; }
.tag-cati { background: #E0E7FF; color: #3730A3; }
.tag-konstruksiyon { background: #F1F5F9; color: #334155; }
.tag-teknik { background: #CCFBF1; color: #0F766E; }

.search-input-wrapper {
    position: relative;
    max-width: 500px;
    margin: 0 auto 1.5rem auto;
}

.search-input-wrapper input {
    width: 100%;
    padding: 0.85rem 1rem 0.85rem 2.8rem;
    border-radius: 30px;
    border: 1px solid var(--gray-300);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
}

.search-input-wrapper input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 60, 94, 0.15);
}

.search-input-wrapper svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-600);
}

/* 14. Hesaplama Araçları (11-Tool Suite) CSS Stilleri */
.calc-suite-container {
    margin-top: 1rem;
}

.calc-nav-tabs {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.55rem;
    padding-bottom: 1.25rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--gray-200);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

@media (max-width: 1024px) {
    .calc-nav-tabs {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 640px) {
    .calc-nav-tabs {
        grid-template-columns: repeat(2, 1fr);
    }
}

.calc-nav-tabs::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

.calc-tab-btn {
    width: 100%;
    justify-content: center;
    background: #ffffff;
    border: 1px solid var(--gray-300);
    border-radius: 10px;
    padding: 0.65rem 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-800);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.calc-tab-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background-color: var(--gray-100);
}

.calc-tab-btn.active {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(26, 60, 94, 0.25);
}

.calc-tab-btn svg {
    flex-shrink: 0;
}

.calc-panel {
    display: none;
}

.calc-panel.active {
    display: block;
    animation: calcFadeIn 0.25s ease-in-out;
}

@keyframes calcFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.calc-grid-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-group .unit-badge {
    font-size: 0.75rem;
    color: var(--gray-600);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background: #ffffff;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 60, 94, 0.15);
}

.calc-result-card {
    background: #ffffff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.calc-metric-highlight {
    background: linear-gradient(135deg, var(--primary) 0%, #0f2b48 100%);
    color: #ffffff;
    padding: 1.1rem 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    text-align: center;
    box-shadow: 0 4px 12px rgba(26, 60, 94, 0.15);
}

.calc-metric-val {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.25;
    margin-top: 0.25rem;
}

.calc-spec-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 1rem 0;
}

.calc-spec-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--gray-100);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    gap: 0.75rem;
    transition: background 0.2s ease;
}

.calc-spec-item:hover {
    background: #f8fafc;
    border-color: var(--gray-300);
}

.calc-spec-main {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.calc-spec-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--gray-600);
}

.calc-spec-val {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    word-break: break-word;
}

.calc-spec-sub {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--gray-600);
    display: inline-block;
}

.calc-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

.calc-badge-success { background: #DCFCE7; color: #15803D; border: 1px solid #bbf7d0; }
.calc-badge-warning { background: #FEF3C7; color: #B45309; border: 1px solid #fde68a; }
.calc-badge-info { background: #E0F2FE; color: #0369A1; border: 1px solid #bae6fd; }

.calc-terms-accordion {
    margin-top: 1rem;
    background: #f8fafc;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    font-size: 0.84rem;
}

.calc-terms-accordion summary {
    font-weight: 700;
    color: var(--gray-800);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.calc-terms-accordion summary::-webkit-details-marker {
    display: none;
}

.calc-terms-content {
    margin-top: 0.65rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-600);
    line-height: 1.55;
    font-size: 0.82rem;
}

/* 15. Ana Sayfa & Hakkımızda Zenginleştirme Stilleri */
/* İstatistik Sayaç Barı */
.stats-bar-wrapper {
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
    color: #ffffff;
    padding: 2.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
    padding: 1rem;
    position: relative;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--gray-300);
    font-weight: 600;
}

.stat-subtext {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 0.2rem;
}

/* B2C vs B2B Segment Kartları */
.segment-box {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 2px solid var(--gray-200);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.segment-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.segment-box.b2c { border-color: #38BDF8; }
.segment-box.b2b { border-color: var(--accent); }

.segment-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
    width: fit-content;
}

.b2c .segment-badge { background: #E0F2FE; color: #0284C7; }
.b2b .segment-badge { background: #FEF3C7; color: #D97706; }

/* Mühendislik Üstünlük Kartları */
.feature-card {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 1.75rem;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.feature-icon-wrapper {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--gray-100);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    transition: all 0.25s ease;
}

.feature-card:hover .feature-icon-wrapper {
    background: var(--primary);
    color: #ffffff;
}

/* Süreç Zaman Çizelgesi (Process Steps) */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    position: relative;
}

@media (max-width: 900px) {
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .process-grid {
        grid-template-columns: 1fr;
    }
}

.process-step-card {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 1.75rem 1.25rem;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
}

.process-number {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem auto;
    box-shadow: 0 4px 10px rgba(26, 60, 94, 0.3);
}

/* Proje Vitrini Kartları */
.project-card {
    background: #ffffff;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.project-card-header {
    background: linear-gradient(135deg, var(--primary) 0%, #11283f 100%);
    color: #ffffff;
    padding: 1.25rem;
}

.project-tag {
    display: inline-block;
    background: rgba(232, 160, 32, 0.25);
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Kurucu & Ekip Biyografi Kartları */
.founder-profile-card {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

@media (max-width: 640px) {
    .founder-profile-card {
        flex-direction: column;
    }
}

.founder-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 800;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

/* Kilometre Taşları (Milestones) Timeline */
.milestone-list {
    position: relative;
    padding-left: 2rem;
    border-left: 3px solid var(--primary);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem 0;
}

.milestone-item {
    position: relative;
}

.milestone-dot {
    position: absolute;
    left: calc(-2rem - 7px);
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--primary);
}

.milestone-year {
    display: inline-block;
    background: var(--primary);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    margin-bottom: 0.35rem;
}