:root {
    --color-background: #f8faff;
    --color-navbar-text: #1a237e;
    --color-highlight: #1976d2;
    --color-project-card: #e3eefd;
    --color-project-card-alt: #bbdefb;
    --color-hover: #1565c0;
    --color-code-bg: #e3eefd;
    --color-code-text: #1976d2;
    --color-card-bg: #e3eefd;
    --color-card-alt: #bbdefb;
    --color-white: #fff;
    --color-yellow: #FFD600;
    --color-accent: #1976d2;
}

body.dark-mode {
    --color-background: #0A192F;
    --color-navbar-text: #CCD6F6;
    --color-highlight: #64FFDA;
    --color-project-card: #112240;
    --color-project-card-alt: #1C273B;
    --color-hover: #38BDF8;
    --color-code-bg: #1C273B;
    --color-code-text: #64FFDA;
    --color-card-bg: #181f2a;
    --color-card-alt: #232b39;
    --color-white: #fff;
}

#darkModeToggle {
    position: fixed;
    top: 18px;
    right: 24px;
    z-index: 1000;
    background: var(--color-project-card);
    color: var(--color-navbar-text);
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(26,35,126,0.10);
    transition: background 0.2s, color 0.2s;
}
#darkModeToggle:hover {
    background: var(--color-highlight);
    color: var(--color-background);
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--color-background);
    color: var(--color-navbar-text);
    overflow-x: hidden;
}

/* Ensure all images are responsive */
img {
    max-width: 100%;
    height: auto;
}

.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 320px;
    background: var(--color-project-card);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 2px 0 16px rgba(26,35,126,0.08);
}

.profile-card {
    background: var(--color-project-card-alt);
    border-radius: 18px;
    padding: 2rem 1.5rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 4px 24px rgba(26,35,126,0.10);
}

.sidebar-photo {
    width: 100px;
    height: 100px;
    border-radius: 18px;
    object-fit: cover;
    margin-bottom: 1rem;
    border: 3px solid var(--color-white);
    background: var(--color-background);
}

.profile-card h2 {
    margin: 0.5rem 0 0.2rem 0;
    color: var(--color-navbar-text);
    font-size: 1.5rem;
}

.sidebar-role {
    background: var(--color-highlight);
    color: var(--color-white);
    padding: 0.3rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 1.2rem;
    font-weight: bold;
}

.sidebar-contact {
    width: 100%;
    font-size: 0.98rem;
    color: var(--color-navbar-text);
    margin-bottom: 1.2rem;
}
.sidebar-label {
    color: var(--color-highlight);
    font-weight: bold;
}
.sidebar-contact a {
    color: var(--color-highlight);
    text-decoration: none;
}
.sidebar-contact a:hover {
    text-decoration: underline;
}

.sidebar-social {
    display: flex;
    gap: 0.7rem;
    margin-top: 1rem;
}
.sidebar-social img {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--color-card-bg);
    padding: 4px;
    transition: background 0.2s, transform 0.2s;
}
.sidebar-social img:hover {
    background: var(--color-hover);
    transform: scale(1.1);
}

.main-content {
    flex: 1;
    padding: 2.5rem 3vw;
    background: var(--color-background);
}

.main-nav {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
    background: var(--color-project-card);
    border-radius: 12px;
    padding: 1rem 2rem;
    box-shadow: 0 2px 8px rgba(26,35,126,0.08);
}
.main-nav a {
    color: var(--color-navbar-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-bottom 0.2s;
}
.main-nav a.active,
.main-nav a:hover {
    color: var(--color-highlight);
    border-bottom: 2px solid var(--color-highlight);
}

.main-section {
    margin-bottom: 2.5rem;
}

.main-section h1, .main-section h2 {
    color: var(--color-highlight);
    margin-bottom: 1.2rem;
}

.doing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}
.doing-card {
    background: var(--color-card-bg);
    border-radius: 14px;
    padding: 1.5rem 1.2rem;
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
    box-shadow: 0 2px 12px rgba(26,35,126,0.10);
    color: var(--color-navbar-text);
    transition: background 0.2s, box-shadow 0.2s;
}
.doing-card img {
    width: 40px;
    height: 40px;
    margin-top: 4px;
}
.doing-card h3 {
    margin: 0 0 0.5rem 0;
    color: var(--color-highlight);
    font-size: 1.15rem;
}
.doing-card p {
    margin: 0;
    color: var(--color-navbar-text);
    font-size: 1rem;
}
.doing-card:hover {
    background: var(--color-card-alt);
    box-shadow: 0 4px 24px var(--color-hover);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}
.skill-card {
    background: var(--color-card-bg);
    border-radius: 18px;
    padding: 1.5rem 0.5rem 1rem 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 2px 8px rgba(26,35,126,0.08);
    transition: background 0.2s, box-shadow 0.2s;
}
.skill-card img {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
}
.skill-card span {
    color: var(--color-navbar-text);
    font-weight: 600;
    font-size: 1.1rem;
}
.skill-card:hover {
    background: var(--color-highlight);
    color: var(--color-white);
    box-shadow: 0 4px 16px var(--color-hover);
}
/* Mobile and Tablet Responsive Design */
@media (max-width: 900px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        flex-direction: row;
        justify-content: center;
        box-shadow: none;
        padding: 1rem;
    }
    .profile-card {
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: 1rem;
        padding: 1rem;
    }
    .sidebar-photo {
        width: 80px;
        height: 80px;
        margin-bottom: 0;
    }
    .main-content {
        padding: 1.5rem 2vw;
    }
    .main-nav {
        flex-wrap: wrap;
        gap: 1rem;
        padding: 1rem;
        justify-content: center;
    }
    .main-nav a {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    #darkModeToggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .sidebar {
        padding: 0.8rem;
    }
    
    .profile-card {
        flex-direction: column;
        text-align: center;
        padding: 1rem 0.8rem;
    }
    
    .profile-card h2 {
        font-size: 1.3rem;
        margin: 0.3rem 0;
    }
    
    .sidebar-photo {
        width: 70px;
        height: 70px;
        margin-bottom: 0.5rem;
    }
    
    .sidebar-role {
        font-size: 0.9rem;
        padding: 0.25rem 0.8rem;
        margin-bottom: 0.8rem;
    }
    
    .sidebar-social {
        gap: 0.5rem;
        margin-top: 0.5rem;
    }
    
    .sidebar-social img {
        width: 24px;
        height: 24px;
        padding: 3px;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .main-nav {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 0.8rem;
        margin-bottom: 1.5rem;
    }
    
    .main-nav a {
        font-size: 0.95rem;
        padding: 0.5rem 0.8rem;
        border-radius: 6px;
        border-bottom: none;
        background: var(--color-background);
    }
    
    .main-nav a.active,
    .main-nav a:hover {
        background: var(--color-highlight);
        color: var(--color-white);
        border-bottom: none;
    }
    
    .main-section {
        margin-bottom: 1.5rem;
    }
    
    .main-section h1 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    .main-section h2 {
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }
    
    .main-section p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 1rem;
    }
    
    .doing-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-top: 1rem;
    }
    
    .doing-card {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
        gap: 0.8rem;
    }
    
    .doing-card img {
        width: 35px;
        height: 35px;
        margin-top: 0;
    }
    
    .doing-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.3rem;
    }
    
    .doing-card p {
        font-size: 0.95rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .skill-card {
        padding: 1rem 0.3rem 0.8rem 0.3rem;
    }
    
    .skill-card img {
        width: 40px;
        height: 40px;
        margin-bottom: 0.8rem;
    }
    
    .skill-card span {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px;
    }
    
    #darkModeToggle {
        top: 8px;
        right: 8px;
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .sidebar {
        padding: 0.5rem;
    }
    
    .profile-card {
        padding: 0.8rem 0.5rem;
    }
    
    .profile-card h2 {
        font-size: 1.2rem;
    }
    
    .sidebar-photo {
        width: 60px;
        height: 60px;
    }
    
    .sidebar-role {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }
    
    .sidebar-social img {
        width: 20px;
        height: 20px;
        padding: 2px;
    }
    
    .main-content {
        padding: 0.8rem;
    }
    
    .main-nav {
        gap: 0.3rem;
        padding: 0.6rem;
    }
    
    .main-nav a {
        font-size: 0.85rem;
        padding: 0.4rem 0.6rem;
    }
    
    .main-section h1 {
        font-size: 1.6rem;
    }
    
    .main-section h2 {
        font-size: 1.2rem;
    }
    
    .main-section p {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .doing-card {
        padding: 0.8rem;
    }
    
    .doing-card img {
        width: 30px;
        height: 30px;
    }
    
    .doing-card h3 {
        font-size: 1rem;
    }
    
    .doing-card p {
        font-size: 0.9rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
        gap: 0.8rem;
    }
    
    .skill-card {
        padding: 0.8rem 0.2rem 0.6rem 0.2rem;
    }
    
    .skill-card img {
        width: 35px;
        height: 35px;
        margin-bottom: 0.6rem;
    }
    
    .skill-card span {
        font-size: 0.9rem;
    }
}

@media (max-width: 360px) {
    .main-nav {
        flex-direction: column;
        align-items: center;
    }
    
    .main-nav a {
        width: 100%;
        text-align: center;
        max-width: 200px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .doing-grid {
        gap: 0.8rem;
    }
}