/* ============================================
   Burak Başara - Professional Website
   Design: Minimal-Modern Professional
   Color Palette: Navy Blue (Lacivert), Gold Accent
   ============================================ */

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

:root {
    --primary-navy: #1a2a4a;
    --accent-gold: #d4af37;
    --background: #f8f9fa;
    --text-dark: #2d3748;
    --text-light: #718096;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    background-color: var(--background);
    line-height: 1.6;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
    color: var(--primary-navy);
}

h2 {
    font-size: 2.25rem;
    color: var(--primary-navy);
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--primary-navy);
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
    font-size: 1rem;
}

a {
    color: var(--primary-navy);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-gold);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--accent-gold);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-navy);
    margin: 5px 0;
    transition: 0.3s;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--accent-gold);
    color: var(--primary-navy);
}

.btn-primary:hover {
    background-color: #c9a227;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-navy);
    border: 2px solid var(--primary-navy);
}

.btn-secondary:hover {
    background-color: var(--primary-navy);
    color: var(--white);
}



.read-more {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-gold);
    font-weight: 600;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: #c9a227;
    transform: translateX(4px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: linear-gradient(135deg, #1a2a4a 0%, #0f1b2e 100%);
    color: var(--white);
    padding: 4rem 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    width: 100%;
}

.hero-content h1 {
    color: var(--white);
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
}

.hero-content h2 {
    color: var(--accent-gold);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-content p {
    color: #d0d8e0;
    font-size: 1.05rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    text-align: center;
}

.hero-image img {
    width: 70%;
    max-width: 350px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

/* ============================================
   EXPERTISE SECTION
   ============================================ */

.expertise {
    padding: 4rem 0;
    background-color: var(--white);
}

.expertise h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.expertise-card {
    background-color: var(--background);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-gold);
    transition: all 0.3s ease;
}

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

.expertise-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.expertise-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ============================================
   INSIGHTS SECTION
   ============================================ */

.insights {
    padding: 4rem 0;
    background-color: var(--background);
}

.insights h2 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.article-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-gold);
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

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

.article-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.article-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.view-all {
    text-align: center;
}

/* ============================================
   MAKALELER SECTION
   ============================================ */

.makaleler {
    padding: 4rem 0;
    background-color: var(--white);
}

.makaleler h2 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.makaleler-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--text-light);
}

/* ============================================
   NEWSLETTER SECTION
   ============================================ */

.newsletter {
    background: linear-gradient(135deg, #1a2a4a 0%, #0f1b2e 100%);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

.newsletter h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.newsletter p {
    color: #d0d8e0;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
    padding: 4rem 0;
    background-color: var(--white);
}

.about h1 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.about-section {
    margin-bottom: 3rem;
}

.about-section h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-navy);
}

.about-section p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.focus-list {
    list-style: none;
    margin-bottom: 2rem;
}

.focus-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.focus-list li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: bold;
}

.credentials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.credential {
    background-color: var(--background);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-gold);
}

.credential h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.credential p {
    font-size: 0.95rem;
}

.publications-list {
    list-style: none;
}

.publications-list li {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.publications-list li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: bold;
}

/* ============================================
   WRITING SECTION
   ============================================ */

.writing {
    padding: 4rem 0;
    background-color: var(--background);
}

.writing h1 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.writing-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--text-light);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    background-color: var(--white);
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid var(--border);
    font-weight: 600;
    font-size: 1rem;
}

.filter-tab:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.filter-tab.active {
    background-color: var(--accent-gold);
    color: var(--primary-navy);
    border-color: var(--accent-gold);
}

.tab-content {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.filter-tags {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-tag {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    background-color: var(--white);
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.filter-tag:hover,
.filter-tag.active {
    background-color: var(--accent-gold);
    color: var(--primary-navy);
    border-color: var(--accent-gold);
}

.full-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.philosophy-coming {
    opacity: 0.7;
}

/* ============================================
   CONNECT SECTION
   ============================================ */

.connect {
    padding: 4rem 0;
    background-color: var(--white);
}

.connect h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.social-links-horizontal {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background-color: var(--background);
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    color: var(--text-dark);
    font-weight: 600;
}

.social-link:hover {
    background-color: var(--accent-gold);
    color: var(--primary-navy);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.social-link svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
    padding: 4rem 0;
    background-color: var(--background);
}

.contact h1 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-form h2,
.contact-info h2 {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-gold);
}

.form-note {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 1rem;
}

.info-item {
    margin-bottom: 2rem;
}

.info-item strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-navy);
}

.info-item a {
    color: var(--accent-gold);
    font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background-color: var(--primary-navy);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.footer-section p {
    color: #d0d8e0;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #d0d8e0;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #a0aec0;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

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

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-image img {
        max-width: 250px;
    }

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

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

    .social-links-horizontal {
        gap: 1rem;
    }

    .social-link {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

    .hero-content h2 {
        font-size: 1.1rem;
    }

    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .filter-tags {
        gap: 0.5rem;
    }

    .filter-tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
}