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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b0;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --border: #2a2a3a;
    --shadow: rgba(99, 102, 241, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border);
    padding: 2rem 0;
    position: relative;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    transition: color 0.3s;
}

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

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.logo .highlight {
    font-size: 1.5rem;
    color: var(--text-secondary);
    -webkit-text-fill-color: var(--text-secondary);
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Skills Container */
.skills-container {
    padding: 3rem 0;
}

.skills-grid {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Skill Category */
.skill-category {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.skill-category.visible {
    opacity: 1;
    transform: translateY(0);
}

.category-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--accent);
}

.category-title i {
    color: var(--accent);
    font-size: 1.5rem;
}

/* Skill Card */
.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateX(-20px);
}

.skill-card.visible {
    opacity: 1;
    transform: translateX(0);
}

.skill-card:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 30px var(--shadow);
    transform: translateX(5px);
}

.skill-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.75rem;
    font-family: 'Courier New', monospace;
}

.skill-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-content {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.footer-bottom {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .logo {
        font-size: 1.8rem;
    }

    .logo .highlight {
        font-size: 1.2rem;
    }

    .category-title {
        font-size: 1.4rem;
    }

    .skill-card {
        padding: 1.25rem;
    }
}