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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, sans-serif;
    background: #f5fbff;
    color: #1f2937;
    line-height: 1.6;
}

/* ÜST MENÜ */
.navbar {
    width: 100%;
    padding: 20px 8%;
    background: #ffffff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #0284c7;
}

.navbar nav a {
    text-decoration: none;
    color: #1f2937;
    margin-left: 22px;
    font-weight: 600;
    transition: 0.3s;
}

.navbar nav a:hover {
    color: #facc15;
}

/* ANA SAYFA */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 70px 8%;
    gap: 40px;
    background: linear-gradient(135deg, #e0f2fe, #ffffff, #fef9c3);
}

.hero-text {
    width: 60%;
}

.small-title {
    color: #0284c7;
    font-weight: bold;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.hero h1 {
    font-size: 54px;
    color: #0f172a;
    margin-bottom: 12px;
}

.hero h2 {
    font-size: 27px;
    color: #334155;
    margin-bottom: 22px;
}

.description {
    font-size: 18px;
    margin-bottom: 32px;
    color: #475569;
}

.buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 14px 24px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

.primary {
    background: #0284c7;
    color: white;
}

.primary:hover {
    background: #0369a1;
}

.secondary {
    background: #facc15;
    color: #1f2937;
}

.secondary:hover {
    background: #eab308;
}

.hero-card {
    width: 35%;
    background: white;
    padding: 32px;
    border-radius: 22px;
    border-top: 8px solid #facc15;
    box-shadow: 0 10px 35px rgba(2, 132, 199, 0.18);
}

.hero-card h3 {
    color: #0284c7;
    margin-bottom: 20px;
    font-size: 25px;
}

.hero-card p {
    margin-bottom: 12px;
}

/* GENEL BÖLÜMLER */
.section {
    padding: 75px 8%;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title p {
    color: #0284c7;
    font-weight: bold;
    margin-bottom: 8px;
}

.section-title h2 {
    font-size: 36px;
    color: #0f172a;
}

/* HAKKIMDA */
.about {
    background: #ffffff;
}

.about-content {
    display: flex;
    gap: 35px;
    align-items: stretch;
}

.about-text {
    width: 65%;
    background: #f8fafc;
    padding: 30px;
    border-radius: 18px;
    border-left: 6px solid #0284c7;
}

.about-text p {
    margin-bottom: 18px;
    font-size: 17px;
    color: #334155;
}

.skills-box {
    width: 35%;
    background: #e0f2fe;
    padding: 30px;
    border-radius: 18px;
    border-bottom: 6px solid #facc15;
}

.skills-box h3 {
    color: #0284c7;
    margin-bottom: 18px;
}

.skills-box ul {
    list-style: none;
}

.skills-box li {
    background: white;
    margin-bottom: 12px;
    padding: 12px;
    border-radius: 10px;
    font-weight: 600;
}

/* İK BÖLÜMÜ */
.hr-section {
    background: #f5fbff;
}

.hr-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.info-card {
    background: white;
    padding: 28px;
    border-radius: 18px;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.08);
    border-top: 5px solid #0284c7;
}

.info-card h3 {
    color: #0284c7;
    margin-bottom: 14px;
    font-size: 22px;
}

.info-card p {
    color: #475569;
    font-size: 16px;
}

/* VAKA ÇALIŞMASI */
.case-section {
    background: linear-gradient(135deg, #fef9c3, #ffffff);
}

.case-box {
    background: white;
    max-width: 1000px;
    margin: auto;
    padding: 35px;
    border-radius: 20px;
    border-left: 8px solid #facc15;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.08);
}

.case-box p {
    margin-bottom: 18px;
    font-size: 17px;
    color: #334155;
}

/* PROJELER */
.projects {
    background: #ffffff;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.project-card {
    background: #f8fafc;
    padding: 28px;
    border-radius: 18px;
    border-bottom: 6px solid #facc15;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.07);
}

.project-card h3 {
    color: #0284c7;
    margin-bottom: 14px;
    font-size: 21px;
}

.project-card p {
    color: #475569;
}

/* İLETİŞİM */
.contact {
    background: #e0f2fe;
}

.contact-container {
    display: flex;
    gap: 35px;
}

.contact-info {
    width: 40%;
    background: white;
    padding: 30px;
    border-radius: 18px;
    border-top: 6px solid #facc15;
}

.contact-info h3 {
    color: #0284c7;
    margin-bottom: 20px;
    font-size: 24px;
}

.contact-info p {
    margin-bottom: 14px;
    color: #334155;
}

.note {
    margin-top: 22px;
    background: #fef9c3;
    padding: 15px;
    border-radius: 12px;
}

.contact-form {
    width: 60%;
    background: white;
    padding: 30px;
    border-radius: 18px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px;
    margin-bottom: 15px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font-size: 15px;
}

.contact-form textarea {
    height: 150px;
    resize: none;
}

.contact-form button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    background: #0284c7;
    color: white;
    font-size: 17px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.contact-form button:hover {
    background: #0369a1;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 25px;
    background: #0f172a;
    color: white;
}

/* TELEFON VE TABLET UYUMU */
@media (max-width: 900px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }

    .navbar nav {
        text-align: center;
    }

    .navbar nav a {
        display: inline-block;
        margin: 6px 8px;
        font-size: 14px;
    }

    .hero {
        flex-direction: column;
        padding: 50px 6%;
        text-align: center;
    }

    .hero-text {
        width: 100%;
    }

    .hero h1 {
        font-size: 38px;
    }

    .hero h2 {
        font-size: 22px;
    }

    .buttons {
        justify-content: center;
        flex-direction: column;
    }

    .hero-card {
        width: 100%;
    }

    .about-content {
        flex-direction: column;
    }

    .about-text,
    .skills-box {
        width: 100%;
    }

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

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

    .contact-container {
        flex-direction: column;
    }

    .contact-info,
    .contact-form {
        width: 100%;
    }
}