/* Root Variables */
:root {
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #565656;
    --text-tertiary: #8e8e8e;
    --accent: #0066ff;
    --border: #e5e5e5;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-hover: rgba(0, 0, 0, 0.12);
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --spacing: 24px;
    --max-width: 1400px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--secondary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 16px;
}

/* Header Section */
.header {
    text-align: center;
    margin-bottom: 64px;
    padding: 48px 24px;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 2px 8px var(--shadow);
}

.profile-section {
    max-width: 600px;
    margin: 0 auto;
}

.avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 24px;
    object-fit: cover;
    border: 4px solid var(--border);
    box-shadow: 0 4px 12px var(--shadow);
}

.title {
    font-size: 44px;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.bio {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
}

.contact {
    font-size: 16px;
    color: var(--text-tertiary);
}

.contact a {
    color: var(--accent);
    text-decoration: underline;
    transition: opacity 0.2s;
}

.contact a:hover {
    opacity: 0.8;
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing);
    margin-bottom: 48px;
}

.span-2 {
    grid-column: span 2;
}

/* Section Styles */
section {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: 0 2px 8px var(--shadow);
    transition: box-shadow 0.3s ease;
}

section:hover {
    box-shadow: 0 4px 16px var(--shadow-hover);
}

section h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* Gallery Section */
.gallery-section {
    overflow: hidden;
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.photo-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.photo-grid img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px var(--shadow-hover);
}

/* Link Cards */
.link-grid,
.community-grid,
.fun-grid,
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
}

.link-card,
.community-card,
.fun-card,
.research-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    text-align: center;
}

.link-card:hover,
.community-card:hover,
.fun-card:hover,
.research-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--shadow-hover);
    border-color: var(--accent);
}

.link-card img,
.community-card img,
.fun-card img,
.research-card img {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    margin-bottom: 12px;
    object-fit: cover;
}

.link-card span,
.community-card span,
.fun-card span,
.research-card span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Startup Cards */
.startup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.startup-card {
    display: flex;
    flex-direction: column;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.startup-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px var(--shadow-hover);
    border-color: var(--accent);
}

.startup-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.startup-info {
    padding: 20px;
}

.startup-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.startup-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Playlist Cards */
.playlist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.playlist-card {
    display: flex;
    flex-direction: column;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    padding-bottom: 16px;
}

.playlist-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px var(--shadow-hover);
    border-color: var(--accent);
}

.playlist-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.playlist-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 12px 16px 4px;
    color: var(--text-primary);
}

.playlist-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0 16px;
}

/* Video Section */
.video-container {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
}

.video-container a {
    display: block;
    position: relative;
}

.video-container img {
    width: 100%;
    height: auto;
    display: block;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    transition: all 0.3s ease;
}

.video-container:hover .play-button {
    background: var(--accent);
    transform: translate(-50%, -50%) scale(1.1);
}

/* Footer */
.footer {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-tertiary);
    font-size: 14px;
}

.footer p {
    margin-bottom: 8px;
}

.footer a {
    color: var(--accent);
    text-decoration: underline;
}

.footer a:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .span-2 {
        grid-column: span 1;
    }

    .title {
        font-size: 36px;
    }

    section h2 {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    .header {
        margin-bottom: 32px;
        padding: 32px 16px;
    }

    .avatar {
        width: 100px;
        height: 100px;
    }

    .title {
        font-size: 28px;
    }

    .bio {
        font-size: 16px;
    }

    .bento-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    section {
        padding: 24px 16px;
    }

    section h2 {
        font-size: 22px;
        margin-bottom: 16px;
    }

    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 8px;
    }

    .photo-grid img {
        height: 150px;
    }

    .startup-grid,
    .playlist-grid {
        grid-template-columns: 1fr;
    }

    .link-grid,
    .community-grid,
    .fun-grid,
    .research-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 24px;
        letter-spacing: -1px;
    }

    .bio {
        font-size: 14px;
    }

    section h2 {
        font-size: 20px;
    }

    .play-button {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    animation: fadeIn 0.6s ease-out;
}

section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.2s; }
section:nth-child(4) { animation-delay: 0.3s; }
section:nth-child(5) { animation-delay: 0.4s; }
section:nth-child(6) { animation-delay: 0.5s; }

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background: var(--accent);
    color: white;
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-bg: #0a0a0a;
        --secondary-bg: #141414;
        --card-bg: #1a1a1a;
        --text-primary: #ffffff;
        --text-secondary: #b3b3b3;
        --text-tertiary: #8e8e8e;
        --border: #2a2a2a;
        --shadow: rgba(0, 0, 0, 0.3);
        --shadow-hover: rgba(0, 0, 0, 0.5);
    }

    .play-button {
        background: rgba(255, 255, 255, 0.15);
    }
}