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

:root[data-theme="dark"] {
    --bg-primary: #0a0a0f;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #25253a;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0b0;
    --text-tertiary: #6a6a7a;
    --accent-from: #6366f1;
    --accent-to: #8b5cf6;
    --accent-hover: #7c3aed;
    --card-bg: rgba(26, 26, 46, 0.6);
    --card-border: rgba(99, 102, 241, 0.1);
    --shadow: rgba(0, 0, 0, 0.3);
}

:root[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f5f5f5;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #8a8a8a;
    --accent-from: #3b82f6;
    --accent-to: #8b5cf6;
    --accent-hover: #6366f1;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(59, 130, 246, 0.1);
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 100;
}

:root[data-theme="dark"] .theme-toggle {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

:root[data-theme="light"] .theme-toggle {
    background: var(--card-bg);
    border-color: var(--card-border);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--accent-from);
}

:root[data-theme="dark"] .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-from);
}

.theme-icon {
    transition: all 0.3s ease;
    color: var(--text-primary);
}

:root[data-theme="dark"] .sun-icon {
    display: block;
    color: #fbbf24;
}

:root[data-theme="dark"] .moon-icon {
    display: none;
}

:root[data-theme="light"] .sun-icon {
    display: none;
}

:root[data-theme="light"] .moon-icon {
    display: block;
    color: var(--text-secondary);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    gap: 3rem;
    padding: 6rem 0 3rem;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--text-tertiary);
}

.hero-image {
    flex-shrink: 0;
}

.hero-image img {
    width: 200px;
    height: 200px;
    border-radius: 28px;
    object-fit: cover;
    border: 4px solid var(--card-border);
    box-shadow: 0 8px 32px var(--shadow);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.hero-image img:hover {
    transform: rotate(8deg) scale(1.05);
    box-shadow: 0 16px 56px var(--shadow);
    border-color: var(--accent-from);
}

.hero-content {
    flex: 1;
    text-align: left;
}

.name {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-tertiary);
    line-height: 1.8;
    max-width: 500px;
    margin-top: 1rem;
}

/* Content Sections */
main {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

section {
    scroll-margin-top: 2rem;
}

/* About Section */
.about {
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--text-tertiary);
}

.about-content {
    max-width: 680px;
}

.about-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-content a {
    color: var(--accent-from);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.about-content a:hover {
    color: var(--accent-to);
}

.about-content a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-from), var(--accent-to));
    transition: width 0.3s ease;
}

.about-content a:hover::after {
    width: 100%;
}

.about-content p:last-child {
    margin-bottom: 0;
}

.about-content mark {
    background: none;
    color: inherit;
    padding: 0 0.1em;
    position: relative;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

.about-content mark::after {
    content: '';
    position: absolute;
    left: 0;
    right: -0.05em;
    bottom: -0.15em;
    height: 0.25em;
    background-image:
        linear-gradient(
            105deg,
            transparent 0%,
            transparent 2%,
            rgba(139, 92, 246, 0.7) 2%,
            rgba(139, 92, 246, 0.6) 25%,
            rgba(139, 92, 246, 0.8) 30%,
            rgba(139, 92, 246, 0.5) 50%,
            rgba(139, 92, 246, 0.75) 60%,
            rgba(139, 92, 246, 0.6) 85%,
            rgba(139, 92, 246, 0.7) 97%,
            transparent 97%,
            transparent 100%
        );
    transform: translateY(-0.15em) rotate(-0.5deg) scaleY(0.8);
    border-radius: 50%;
    opacity: 0.9;
}

:root[data-theme="light"] .about-content mark::after {
    background-image:
        linear-gradient(
            105deg,
            transparent 0%,
            transparent 2%,
            rgba(99, 102, 241, 0.8) 2%,
            rgba(99, 102, 241, 0.65) 25%,
            rgba(99, 102, 241, 0.85) 30%,
            rgba(99, 102, 241, 0.6) 50%,
            rgba(99, 102, 241, 0.8) 60%,
            rgba(99, 102, 241, 0.65) 85%,
            rgba(99, 102, 241, 0.75) 97%,
            transparent 97%,
            transparent 100%
        );
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Notes Section */
.notes-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.notes-header .section-title {
    margin-bottom: 0;
}

.view-all-link {
    color: var(--accent-from);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.view-all-link:hover {
    color: var(--accent-bright);
    transform: translateX(4px);
}

/* Notes Section */
.notes-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.note-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 1rem 0;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s ease;
    gap: 2rem;
    border-bottom: 1px solid var(--card-border);
}

.note-item:first-child {
    padding-top: 0;
}

.note-item:hover {
    padding-left: 0.5rem;
}

.note-item:hover .note-title {
    color: var(--accent-from);
}

.note-title {
    font-size: 1.05rem;
    font-weight: 500;
    transition: all 0.2s ease;
    flex: 1;
}

.note-date {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    font-weight: 400;
}

.empty-state {
    color: var(--text-tertiary);
    font-size: 1rem;
    padding: 0;
}

/* Footer */
footer {
    margin-top: 2rem;
    padding-top: 3rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.email-link {
    color: var(--accent-from);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.email-link:hover {
    color: var(--accent-to);
}

.email-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-from), var(--accent-to));
    transition: width 0.3s ease;
}

.email-link:hover::after {
    width: 100%;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.social-links a {
    color: var(--text-tertiary);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
}

.social-links a:hover {
    color: var(--accent-from);
    transform: translateY(-2px);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

.copyright {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 44px;
        height: 44px;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 4rem 0 3rem;
        margin-bottom: 3rem;
        gap: 2rem;
    }

    .hero-image img {
        width: 120px;
        height: 120px;
    }

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

    .hero-description {
        margin: 0 auto;
    }

    .name {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: 1rem;
        margin: 0 auto;
        margin-top: 1rem;
    }

    .about-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.25rem;
        margin-bottom: 1.5rem;
    }

    .page-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .view-all-link {
        font-size: 0.9rem;
    }

    main {
        gap: 3rem;
    }

    .note-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .note-item:hover {
        padding-left: 0;
    }

    footer {
        margin-top: 4rem;
        gap: 1.25rem;
    }

    .social-links {
        gap: 2rem;
    }

    .social-links svg {
        width: 22px;
        height: 22px;
    }
}

/* Note Page Styles */
article {
    max-width: 680px;
}

article h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

article h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

article p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

article ul, article ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

article li {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

article code {
    font-family: 'Monaco', 'Cascadia Code', 'Courier New', monospace;
    background: var(--card-bg);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9em;
    border: 1px solid var(--card-border);
}

article pre {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    overflow-x: auto;
    border: 1px solid var(--card-border);
    margin: 1.5rem 0;
}

article pre code {
    background: none;
    padding: 0;
    border: none;
}

article a {
    color: var(--accent-from);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

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

article a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-from), var(--accent-to));
    transition: width 0.3s ease;
}

article a:hover::after {
    width: 100%;
}