:root {
    /* Shared Variables */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

body.theme-dark {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-card: #1a1a1a;
    --bg-card-hover: #222222;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border-color: #2a2a2a;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --link-icon-bg: rgba(255, 255, 255, 0.1);
    --learning-card-bg: linear-gradient(135deg, var(--bg-card) 0%, rgba(139, 92, 246, 0.1) 100%);
}

body.theme-light {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ebebeb;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f8f8;
    --text-primary: #1a1a1a;
    --text-secondary: #5f5f5f;
    --border-color: #d5d5d5;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --link-icon-bg: rgba(0, 0, 0, 0.05);
    --learning-card-bg: linear-gradient(135deg, var(--bg-card) 0%, rgba(139, 92, 246, 0.08) 100%);
}

/* Base reset applies colors to body */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: var(--spacing-lg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Profile Header */
.profile-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease;
}

.profile-avatar {
    margin-bottom: var(--spacing-lg);
}

.avatar-image {
    width: 96px;
    height: 96px;
    margin: 0 auto;
    border-radius: var(--radius-full);
    display: block;
    object-fit: cover;
    box-shadow: var(--shadow-lg), 0 0 0 4px var(--bg-primary), 0 0 0 5px var(--border-color);
    transition: transform var(--transition-base);
}

.avatar-image:hover {
    transform: scale(1.05);
}

.profile-name {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
    transition: letter-spacing var(--transition-base);
    user-select: none;
}

.profile-name:hover {
    letter-spacing: 0.02em;
}

.profile-bio {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Links Section */
.links-section {
    margin-bottom: var(--spacing-2xl);
}

.links-grid {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--spacing-md);
    align-items: start;
}

.links-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.link-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 0;
}

.link-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.link-card:hover::before {
    opacity: 0.1;
}

.link-card.primary {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

.link-card.primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.link-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--link-icon-bg);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.link-card.primary .link-icon {
    background: rgba(255, 255, 255, 0.2);
}

.link-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
    position: relative;
    z-index: 1;
}

.link-title {
    font-weight: 600;
    font-size: 1.125rem;
}

.link-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.link-card.primary .link-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.link-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Small Hobby Card */
.hobby-card-small {
    position: relative;
    width: 180px;
    height: 100%;
    min-height: 180px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s ease;
}

.hobby-card-small:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hobby-image-small {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hobby-card-small:hover .hobby-image-small {
    transform: scale(1.1);
}

.hobby-overlay-small {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-base);
}

.hobby-card-small:hover .hobby-overlay-small {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.5) 50%, transparent 100%);
}

.hobby-icon-small {
    font-size: 1.75rem;
}

/* Sections */
.section {
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.skill-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    text-align: center;
    transition: all var(--transition-base);
    min-height: 120px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.skill-card:hover::before {
    opacity: 0.15;
}

.skill-card.non-clickable {
    cursor: default;
}

.skill-card.learning {
    border-color: var(--accent-secondary);
    background: var(--learning-card-bg);
}

.skill-icon {
    font-size: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.skill-favicon {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.skill-text {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    position: relative;
    z-index: 1;
}

.skill-name {
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
}

.skill-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-md);
    }

    .container {
        padding: var(--spacing-md) 0;
    }

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

    .hobby-card-small {
        width: 100%;
        min-height: 150px;
    }

    .profile-name {
        font-size: 1.75rem;
    }

    .profile-bio {
        font-size: 1rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--spacing-sm);
    }

    .skill-card {
        min-height: 100px;
        padding: var(--spacing-md);
    }

    .link-card {
        padding: var(--spacing-md);
    }

    .theme-toggle {
        top: var(--spacing-md);
        right: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .skills-grid {
        grid-template-columns: 1fr 1fr;
    }

    .profile-name {
        font-size: 1.5rem;
    }

    .avatar-image {
        width: 80px;
        height: 80px;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .link-card,
    .skill-card {
        break-inside: avoid;
    }

    .theme-toggle {
        display: none;
    }
}