/* ==========================================
   Bir Roka - Simple Portfolio
   ========================================== */

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

:root {
    --primary: #3b82f6;
    --secondary: #1e293b;
    --accent: #10b981;
    --text: #334155;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 2px 10px rgba(0,0,0,0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text);
}

html {
    scroll-behavior: smooth;
}

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

/* ==========================================
   Navigation
   ========================================== */

.navbar {
    background: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 700;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 100px 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.highlight {
    border-bottom: 4px solid #fbbf24;
}

.title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--white);
    color: var(--primary);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

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

/* ==========================================
   About Section
   ========================================== */

.about {
    padding: 80px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--secondary);
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.expertise-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.area {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s;
}

.area:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.area-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.area h3 {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.area p {
    color: var(--text-light);
    text-align: left;
}

/* ==========================================
   Skills Section
   ========================================== */

.skills {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.skill-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    margin-bottom: 1.5rem;
    color: var(--secondary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tags span {
    background: var(--primary);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* ==========================================
   Projects Section
   ========================================== */

.projects {
    padding: 80px 0;
    background: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.project-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.project-card h3 {
    color: var(--secondary);
    margin-bottom: 1rem;
}

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

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    background: var(--bg-light);
    color: var(--primary);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ==========================================
   Contact Section
   ========================================== */

.contact {
    padding: 80px 0;
    background: var(--bg-light);
}

.contact-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

/* Contact Info */
.contact-info {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    height: fit-content;
}

.contact-info h3 {
    color: var(--secondary);
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.contact-icon {
    font-size: 2rem;
}

.contact-item h4 {
    color: var(--secondary);
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
}

.contact-item a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-item p {
    color: var(--text);
    margin: 0;
}

.social-links {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.social-links h4 {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    font-size: 2rem;
    transition: transform 0.3s;
}

.social-icons a:hover {
    transform: scale(1.2);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
}

.contact-form-wrapper h3 {
    color: var(--secondary);
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--secondary);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-submit:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

.form-message {
    margin-top: 1rem;
}

.success-message {
    padding: 1rem;
    background: #d1fae5;
    color: #065f46;
    border-radius: 6px;
    border-left: 4px solid var(--accent);
}

.error-message {
    padding: 1rem;
    background: #fee2e2;
    color: #991b1b;
    border-radius: 6px;
    border-left: 4px solid #ef4444;
}

/* ==========================================
   Footer
   ========================================== */

footer {
    background: var(--secondary);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
}

footer p {
    margin-bottom: 0.5rem;
}

.footer-note {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

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

    .title {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

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

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

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

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

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 2rem;
    }
}