:root {
    --primary: #ef233c;
    --dark: #2b2d42;
    --gray: #8d99ae;
    --light: #edf2f4;
    --white: #fff;
    --radius: 8px;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--light);
    color: var(--dark);
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 66px;
    height: 100vh;
    background: var(--dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 10;
    box-shadow: 2px 0 8px rgba(0,0,0,0.03);
}

.sidebar .logo {
    margin: 20px 0 40px 0;
    font-size: 2.4rem;
    font-weight: bold;
    color: var(--primary);
    background: var(--white);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar li {
    margin: 16px 0;
}

.sidebar a {
    color: var(--gray);
    text-decoration: none;
    font-size: 1.4rem;
    display: block;
    transition: color 0.2s, transform 0.2s;
    padding: 7px;
    border-radius: 6px;
}

.sidebar a.active,
.sidebar a:hover {
    color: var(--primary);
    background: var(--light);
    transform: scale(1.15);
}

main {
    margin-left: 66px;
    min-height: 100vh;
}

.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 0 20px;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.4rem;
    margin: 0 0 12px 0;
}

.hero h2 {
    font-size: 1.4rem;
    color: var(--primary);
    margin: 0 0 20px 0;
}

.hero p {
    font-size: 1.07rem;
    color: var(--gray);
}

.hero-socials {
    margin: 24px 0 16px 0;
}

.hero-socials a {
    color: var(--white);
    margin: 0 10px;
    font-size: 1.5rem;
    transition: color 0.2s, transform 0.2s;
}

.hero-socials a:hover {
    color: var(--primary);
    transform: scale(1.15);
}

.hero-contact-btn {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 11px 30px;
    border-radius: var(--radius);
    font-size: 1.02rem;
    font-weight: 600;
    text-decoration: none;
    margin-top: 16px;
    transition: background 0.2s;
}

.hero-contact-btn:hover {
    background: #d90429;
}

.section {
    background: var(--white);
    margin: 36px auto 0 auto;
    max-width: 820px;
    border-radius: var(--radius);
    box-shadow: 0 2px 16px rgba(0,0,0,0.04);
    padding: 48px 32px;
}

.section h2 {
    color: var(--primary);
    margin-top: 0;
}

.edu-list {
    display: flex;
    flex-wrap: wrap;
    gap: 36px;
    margin-top: 28px;
}

.edu-list > div {
    background: var(--light);
    padding: 18px 24px;
    border-radius: var(--radius);
    flex: 1;
    min-width: 240px;
    box-sizing: border-box;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 32px;
}

.skills-grid > div {
    background: var(--light);
    padding: 16px 20px;
    border-radius: var(--radius);
    min-width: 180px;
}

.skills-grid h4 {
    margin: 0 0 8px 0;
    color: var(--dark);
    font-size: 1rem;
}

.work-item {
    background: var(--light);
    padding: 18px 28px;
    border-radius: var(--radius);
    margin-top: 20px;
}

.work-item h3 {
    margin: 0;
    color: var(--dark);
    font-size: 1.25rem;
}

.work-item h3 span {
    color: var(--primary);
    font-size: 1rem;
    font-weight: 400;
}

.work-duration {
    color: var(--gray);
    font-size: 0.98rem;
    margin-bottom: 9px;
    display: block;
}

.work-item ul {
    margin: 12px 0 0 18px;
}

.project-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    margin-top: 32px;
}

.project-card {
    background: var(--light);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    padding: 16px 22px;
    flex: 1;
    min-width: 260px;
    box-sizing: border-box;
}

.project-card h4 {
    margin: 0 0 8px 0;
    color: var(--primary);
}

.project-meta {
    display: block;
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.achievements {
    margin-top: 42px;
}

.achievements h4 {
    color: var(--primary);
    margin-bottom: 10px;
}

.achievements ul {
    margin: 0 0 0 18px;
}

.contact-section {
    text-align: center;
}

.contact-info {
    margin: 28px auto 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    max-width: 370px;
}

.contact-info div {
    font-size: 1.1rem;
}

.contact-info i {
    color: var(--primary);
    margin-right: 7px;
}

footer {
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 18px 0;
    font-size: 1rem;
    margin-top: 40px;
}

/* Responsive */
@media (max-width: 950px) {
    main {
        margin-left: 0;
    }
    .sidebar {
        position: static;
        width: 100vw;
        height: 56px;
        flex-direction: row;
        box-shadow: none;
        justify-content: flex-start;
    }
    .sidebar .logo {
        margin: 0 20px 0 0;
    }
    .sidebar ul {
        flex-direction: row;
        width: 100vw;
        margin-left: 12px;
    }
    .sidebar li {
        margin: 0 10px;
    }
}

@media (max-width: 700px) {
    .section, .hero-content {
        padding: 22px 5vw;
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
    .edu-list {
        flex-direction: column;
        gap: 16px;
    }
    .project-grid {
        flex-direction: column;
        gap: 18px;
    }
}

@media (max-width: 500px) {
    .section, .hero-content {
        padding: 10px 2vw;
    }
    .sidebar .logo {
        font-size: 1.5rem;
        width: 32px;
        height: 32px;
    }
}