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

body {
    font-family: 'Inter', sans-serif;
    background-color: #0d0f12;
    color: #e0e0e0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    background: #161920;
    border-bottom: 1px solid #2a2f3a;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}
.logo {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}
.logo span {
    color: #ff6b00;
}
.nav-links a {
    color: #b0b8c4;
    text-decoration: none;
    margin-left: 20px;
    font-size: 0.95rem;
    transition: color 0.2s;
}
.nav-links a:hover {
    color: #ff6b00;
}
.btn-primary {
    background: #ff6b00;
    color: #fff !important;
    padding: 8px 18px;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
}
.btn-primary:hover {
    background: #e05e00;
}

.hero {
    padding: 90px 0;
    background: linear-gradient(135deg, #111318 0%, #1a1e28 100%);
    text-align: center;
    border-bottom: 1px solid #2a2f3a;
}
.hero h1 {
    font-family: 'Rajdhani', sans-serif;
    font-size: 2.8rem;
    color: #fff;
    margin-bottom: 15px;
}
.hero h1 span {
    color: #ff6b00;
}
.hero p {
    font-size: 1.15rem;
    color: #90a4ae;
    max-width: 700px;
    margin: 0 auto 30px;
}
.btn-outline {
    border: 1px solid #ff6b00;
    color: #ff6b00;
    padding: 8px 18px;
    border-radius: 4px;
    text-decoration: none;
    margin-left: 10px;
}

.section {
    padding: 60px 0;
}
.bg-darker {
    background-color: #0b0c0f;
}
.section-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 2rem;
    color: #fff;
    margin-bottom: 40px;
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.card {
    background: #161920;
    border: 1px solid #2a2f3a;
    padding: 25px;
    border-radius: 8px;
}
.card h3 {
    font-family: 'Rajdhani', sans-serif;
    color: #ff6b00;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

/* ZİNCİR DİŞLİ BİLEŞENLERİ */
.zincir-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
    align-items: start;
}
.zincir-calc-card, .zincir-table-card {
    background: #161920;
    border: 1px solid #2a2f3a;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.zincir-calc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 2px solid #ff6b00;
    padding-bottom: 10px;
}
.zincir-calc-header h3 {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.25rem;
    color: #fff;
    margin: 0;
}
.btn-clear {
    background: #2a2f3a;
    color: #ff6b00;
    border: 1px solid #ff6b00;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}
.btn-clear:hover {
    background: #ff6b00;
    color: #fff;
}
.zincir-calc-table, .zincir-standart-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
    font-size: 0.88rem;
}
.zincir-calc-table th, .zincir-calc-table td,
.zincir-standart-table th, .zincir-standart-table td {
    border: 1px solid #2c3240;
    padding: 8px 6px;
    text-align: center;
    word-wrap: break-word;
}
.zincir-calc-table th {
    background: #202532;
    color: #ff6b00;
    font-weight: 600;
}
.zincir-calc-table td {
    background: #111318;
    color: #e0e0e0;
}
.zincir-calc-table select, 
.zincir-calc-table input {
    width: 100%;
    box-sizing: border-box;
    background: #0d0f12;
    border: 1px solid #3a4150;
    color: #fff;
    padding: 6px 4px;
    border-radius: 4px;
    text-align: center;
    font-size: 0.85rem;
}
.zincir-calc-table input:focus, 
.zincir-calc-table select:focus {
    outline: none;
    border-color: #ff6b00;
}
.input-readonly {
    background: #1a1d24 !important;
    color: #8a94a6 !important;
    border-color: #2a2f3a !important;
}
.table-section-head th {
    background: #1b2230;
    color: #64b5f6;
    font-size: 0.85rem;
}
.table-main-title th {
    background: #251d14;
    color: #ff9800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.sub-label td {
    background: #161b26;
    color: #90a4ae;
    font-size: 0.78rem;
    font-weight: bold;
}
.val-row td {
    font-weight: bold;
    color: #4caf50;
    font-size: 0.95rem;
}
.table-responsive {
    overflow-x: auto;
    max-width: 100%;
}
.zincir-standart-table th {
    background: #1f2430;
    color: #ff6b00;
}
.zincir-standart-table tr:nth-child(even) td {
    background: #14171f;
}
.zincir-standart-table tr:nth-child(odd) td {
    background: #0f1117;
}

.footer {
    background: #08090b;
    border-top: 1px solid #1f2430;
    padding: 40px 0 20px;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 20px;
}
.footer h3 {
    font-family: 'Rajdhani', sans-serif;
    color: #ff6b00;
}
.footer-bottom {
    text-align: center;
    font-size: 0.85rem;
    color: #606d80;
    border-top: 1px solid #161920;
    padding-top: 15px;
}