:root {
    /* Colors */
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-primary-accessible: #5568d3;
    --color-text-dark: #333;
    --color-text-medium: #555;
    --color-text-light: #888;
    --color-text-white: #fff;
    --color-text-gray: #ccc;
    --color-background-dark: #1a1a1a;
    --color-background-medium: #2a2a2a;
    --color-background-footer: #333;
    --color-background-white: white;
    --color-background-light: #f8f9fa;
    --color-background-learning: #e7f3ff;
    --color-border-light: #ddd;
    --color-border-dark: #d0d0d0;
    --color-black: #000;

    /* Fonts */
    --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 1rem;
    --font-size-small: 0.9rem;
    --font-size-medium: 0.95rem;
    --font-size-large: 1.2rem;
    --font-size-xlarge: 1.5rem;
    --font-size-xxlarge: 1.8rem;
    --font-size-xxxlarge: 2rem;
    --font-size-huge: 2.5rem;
    --line-height-base: 1.6;
    --line-height-relaxed: 1.7;
}

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

body {
    font-family: var(--font-family-primary);
    line-height: var(--line-height-base);
    color: var(--color-text-dark);
    background-color: var(--color-background-dark);
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--color-background-white);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-white);
    padding: 3rem 2rem;
    text-align: center;
}

header h1 {
    font-size: var(--font-size-huge);
    margin-bottom: 0.5rem;
}

header p {
    font-size: var(--font-size-large);
    opacity: 0.95;
    margin-bottom: 1.5rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    font-size: var(--font-size-medium);
}

.contact-info a {
    color: var(--color-text-white);
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s;
}

.contact-info a:hover {
    opacity: 1;
    text-decoration: underline;
}

main {
    padding: 2rem;
}

section {
    margin-bottom: 2.5rem;
}

h2 {
    color: var(--color-primary);
    font-size: var(--font-size-xxlarge);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}

h3 {
    color: var(--color-text-medium);
    font-size: var(--font-size-large);
    margin-bottom: 0.5rem;
}

ul {
    list-style-type: square;
    list-style-position: inside;
    margin-left: 1rem;
}

li {
    margin-bottom: 0.5rem;
    line-height: var(--line-height-relaxed);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.skill-category {
    background-color: var(--color-background-light);
    padding: 1rem;
    border-radius: 5px;
}

.skill-category strong {
    color: var(--color-primary-accessible);
    display: block;
    margin-bottom: 0.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th,
td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

th {
    background-color: var(--color-primary-accessible);
    color: var(--color-text-white);
    font-weight: 600;
}

tr:hover {
    background-color: var(--color-background-light);
}

.learning-box {
    padding: 1rem;
    margin-top: 1rem;
}

.learning-box ul {
    margin-left: 1.5rem;
}

.learning-item {
    margin-bottom: 1.5rem;
}

.learning-item:last-child {
    margin-bottom: 0;
}

.learning-item span {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.progress-gauge {
    display: flex;
    gap: 0.25rem;
    height: 1.5rem;
}

.gauge-segment {
    flex: 1;
    background-color: var(--color-border-dark);
    border-radius: 3px;
    transition: background-color 0.3s ease;
}

.gauge-segment.filled {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

footer {
    background-color: var(--color-background-footer);
    color: var(--color-text-white);
    text-align: center;
    padding: 1.5rem;
    font-size: var(--font-size-small);
}

@media (max-width: 768px) {
    header h1 {
        font-size: var(--font-size-xxxlarge);
    }

    header p {
        font-size: var(--font-size-base);
    }

    .contact-info {
        flex-direction: column;
        gap: 0.5rem;
    }

    main {
        padding: 1.5rem;
    }

    h2 {
        font-size: var(--font-size-xlarge);
    }

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

    table {
        font-size: var(--font-size-small);
    }

    th,
    td {
        padding: 0.5rem;
    }
}

/* Gallery Page Styles */
body.gallery-page {
    color: var(--color-text-white);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100vh;
}

body.gallery-page header {
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav h1 {
    font-size: var(--font-size-xlarge);
}

.nav-links {
    display: flex;
    gap: 1rem;
}

nav a {
    color: var(--color-text-white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.explore-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.explore-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: 2px solid var(--color-primary);
    border-radius: 10px;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.explore-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
}

.explore-card h3 {
    color: var(--color-primary-accessible);
    font-size: var(--font-size-large);
    margin-bottom: 0.5rem;
}

.explore-card p {
    color: var(--color-text-medium);
    font-size: var(--font-size-medium);
    margin: 0;
}

body.gallery-page main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: hidden;
    min-height: 0;
}

.gallery-container {
    max-width: 1200px;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.image-display {
    width: 100%;
    flex: 1;
    background-color: var(--color-background-medium);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
}

.image-display img {
    max-width: 100%;
    max-height: 100%;
    display: block;
    object-fit: contain;
    background-color: var(--color-black);
}

.controls {
    display: flex;
    align-items: center;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    flex-shrink: 0;
}

.nav-button {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-white);
    border: none;
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    min-width: 120px;
}

.nav-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.nav-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.image-counter {
    font-size: var(--font-size-large);
    color: var(--color-text-gray);
    min-width: 100px;
    text-align: center;
}

.keyboard-hint {
    color: var(--color-text-light);
    font-size: var(--font-size-small);
    text-align: center;
    flex-shrink: 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

@media (max-width: 768px) {
    body.gallery-page header {
        padding: 1rem;
    }

    nav h1 {
        font-size: var(--font-size-large);
    }

    .controls {
        gap: 1rem;
    }

    .nav-button {
        padding: 0.75rem 1.5rem;
        font-size: var(--font-size-small);
        min-width: 100px;
    }
}

/* Vibe Coding Page Styles */
body.vibe-coding-page {
    color: var(--color-text-white);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body.vibe-coding-page header {
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

body.vibe-coding-page main {
    flex: 1;
    padding: 2rem;
}

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

.intro-section {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    border-radius: 10px;
}

.intro-section p {
    font-size: var(--font-size-large);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-gray);
}

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

.project-card {
    background-color: var(--color-background-medium);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.4);
}

.project-card h2 {
    color: var(--color-text-white);
    font-size: var(--font-size-xlarge);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.5rem;
}

.project-card h3 {
    color: var(--color-text-gray);
    font-size: var(--font-size-base);
    margin: 1rem 0 0.5rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.ai-badge {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-white);
    padding: 0.25rem 0.75rem;
    border-radius: 5px;
    font-size: var(--font-size-small);
    font-weight: 600;
}

.tech-stack {
    color: var(--color-text-gray);
    font-size: var(--font-size-small);
    padding: 0.25rem 0.75rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
}

.project-card > p {
    color: var(--color-text-gray);
    line-height: var(--line-height-relaxed);
    margin-bottom: 1rem;
}

.project-highlights ul {
    list-style-type: none;
    margin-left: 0;
    color: var(--color-text-gray);
}

.project-highlights li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.project-highlights li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.demo-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-white);
    text-decoration: none;
    border-radius: 5px;
    font-size: var(--font-size-small);
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.demo-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.philosophy-section {
    background-color: var(--color-background-medium);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.philosophy-section h2 {
    color: var(--color-text-white);
    font-size: var(--font-size-xxlarge);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.5rem;
}

.philosophy-section p {
    color: var(--color-text-gray);
    line-height: var(--line-height-relaxed);
    margin-bottom: 1rem;
}

.philosophy-section p:last-child {
    margin-bottom: 0;
}

.approach-section {
    background-color: var(--color-background-medium);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    margin-top: 2rem;
}

.approach-section h2 {
    color: var(--color-text-white);
    font-size: var(--font-size-xxlarge);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.5rem;
}

.approach-section > p {
    color: var(--color-text-gray);
    line-height: var(--line-height-relaxed);
    margin-bottom: 1.5rem;
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.approach-card {
    background-color: rgba(0, 0, 0, 0.2);
    border-left: 4px solid var(--color-primary);
    border-radius: 5px;
    padding: 1.5rem;
}

.approach-card h3 {
    color: var(--color-primary);
    font-size: var(--font-size-large);
    margin-bottom: 0.75rem;
}

.approach-card p {
    color: var(--color-text-gray);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

@media (max-width: 768px) {
    body.vibe-coding-page header {
        padding: 1rem;
    }

    body.vibe-coding-page main {
        padding: 1rem;
    }

    .intro-section {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }

    .intro-section p {
        font-size: var(--font-size-base);
    }

    .project-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }

    .project-card {
        padding: 1.5rem;
    }

    .project-card h2 {
        font-size: var(--font-size-large);
    }

    .philosophy-section {
        padding: 1.5rem;
    }

    .philosophy-section h2 {
        font-size: var(--font-size-xlarge);
    }

    .approach-section {
        padding: 1.5rem;
        margin-top: 1.5rem;
    }

    .approach-section h2 {
        font-size: var(--font-size-xlarge);
    }

    .approach-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .approach-card {
        padding: 1rem;
    }
}