:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0e0a;
    --bg-tertiary: #0d1b0d;
    --text-primary: #00ff41;
    --text-secondary: #00b32d;
    --border-color: #003311;
    --accent-primary: #00ff41;
    --accent-secondary: #00cc33;
    --accent-hover: #00ff66;
    --success-color: #00ff41;
    --warning-color: #ffff00;
    --danger-color: #ff0000;
    --shadow: rgba(0, 255, 65, 0.3);
    --transition: all 0.3s ease;
    --matrix-color: #00ff41;
}

[data-theme="light"] {
    --bg-primary: #f0f6f0;
    --bg-secondary: #e8f5e8;
    --bg-tertiary: #ffffff;
    --text-primary: #1a4d1a;
    --text-secondary: #2d662d;
    --border-color: #c8e6c8;
    --accent-primary: #2d8b2d;
    --accent-secondary: #1f6b1f;
    --accent-hover: #3da63d;
    --success-color: #1f8b1f;
    --warning-color: #b38600;
    --danger-color: #cc0000;
    --shadow: rgba(0, 0, 0, 0.1);
    --matrix-color: #88cc88;
}

/* Respect system theme preference by default */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]):not([data-theme="light"]) {
        --bg-primary: #f0f6f0;
        --bg-secondary: #e8f5e8;
        --bg-tertiary: #ffffff;
        --text-primary: #1a4d1a;
        --text-secondary: #2d662d;
        --border-color: #c8e6c8;
        --accent-primary: #2d8b2d;
        --accent-secondary: #1f6b1f;
        --accent-hover: #3da63d;
        --success-color: #1f8b1f;
        --warning-color: #b38600;
        --danger-color: #cc0000;
        --shadow: rgba(0, 0, 0, 0.1);
        --matrix-color: #88cc88;
    }
}

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

/* Matrix Background Canvas */
#matrixCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.15;
    pointer-events: none;
}

body {
    font-family: 'Courier New', 'Consolas', monospace, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 6px var(--shadow);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(20deg);
    border-color: var(--accent-primary);
}

.theme-icon {
    font-size: 24px;
}

/* Header */
.header {
    background: linear-gradient(135deg, rgba(10, 14, 10, 0.9) 0%, rgba(13, 27, 13, 0.9) 100%);
    padding: 60px 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(5px);
}

.profile {
    text-align: center;
    animation: fadeIn 0.6s ease-in;
}

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

.profile-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid var(--accent-primary);
    margin-bottom: 20px;
    transition: var(--transition);
    box-shadow: 0 8px 16px var(--shadow);
}

.profile-avatar:hover {
    transform: scale(1.05);
    border-color: var(--accent-hover);
}

.profile-name {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--accent-primary);
    text-shadow: 0 0 10px var(--shadow);
}

.profile-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent-secondary);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.profile-bio {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-style: italic;
}

.profile-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.profile-links {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: transparent;
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-primary:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow), 0 0 20px var(--shadow);
}

/* Main Content */
.main {
    flex: 1;
    padding: 20px 0 60px;
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.filter-controls {
    display: flex;
    gap: 10px;
}

.filter-select {
    padding: 8px 16px;
    border-radius: 6px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-select:hover,
.filter-select:focus {
    border-color: var(--accent-primary);
    outline: none;
}

/* Repository Grid */
.repo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
    animation: fadeIn 0.6s ease-in;
}

.repo-card {
    background: rgba(10, 14, 10, 0.8);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    backdrop-filter: blur(10px);
}

.repo-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow), 0 0 30px var(--shadow);
    background: rgba(13, 27, 13, 0.9);
}

.repo-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.repo-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.repo-title {
    flex: 1;
}

.repo-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    display: block;
    margin-bottom: 4px;
    word-break: break-word;
}

.repo-name:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.repo-visibility {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-transform: uppercase;
}

.repo-description {
    color: var(--text-secondary);
    margin-bottom: 16px;
    flex: 1;
    line-height: 1.5;
}

.repo-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.repo-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.repo-language {
    display: flex;
    align-items: center;
    gap: 6px;
}

.language-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.repo-stats {
    display: flex;
    gap: 12px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Loading & Error States */
.loading,
.error {
    text-align: center;
    padding: 60px 20px;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    color: var(--danger-color);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .profile-name {
        font-size: 2rem;
    }

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

    .profile-stats {
        gap: 20px;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
    }

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

    .theme-toggle {
        width: 45px;
        height: 45px;
        top: 15px;
        right: 15px;
    }
}

@media (max-width: 480px) {
    .profile-avatar {
        width: 120px;
        height: 120px;
    }

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

    .profile-stats {
        gap: 15px;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }
}