:root {
    --bg-dark: #07090e;
    --bg-card: rgba(18, 24, 38, 0.7);
    --border-card: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-cyan: #06b6d4;
    --accent-blue: #3b82f6;
    --accent-emerald: #10b981;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 40%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 0 1.5rem 4rem 1.5rem;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Navigation / Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem 0 1.5rem 0;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.tech-badge {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--accent-cyan);
    padding: 4px 12px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Hero Section */
.hero {
    margin: 2rem 0 3rem 0;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.7;
}

/* Sections */
.section {
    margin-bottom: 3.5rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.4rem;
    font-weight: 700;
}

.section-line {
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.06);
}

/* Project Cards */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(12px);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    border-color: rgba(56, 189, 248, 0.3);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #fff;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 1rem;
}

.tag {
    background: rgba(255, 255, 255, 0.05);
    color: #cbd5e1;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: monospace;
}

.card-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
}

.card-link:hover {
    text-decoration: underline;
}

/* Skills Matrix */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.25rem;
}

.skill-category {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 1rem;
}

.skill-cat-name {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--accent-cyan);
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.skill-pill {
    display: inline-block;
    background: rgba(255, 255, 255, 0.04);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    margin: 2px;
}

/* Terminal Chips */
.chip {
    background: rgba(255, 255, 255, 0.07);
    color: #cbd5e1;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: monospace;
    cursor: pointer;
    transition: background 0.15s;
}

.chip:hover {
    background: rgba(255, 255, 255, 0.15);
}

.chip.benchmark {
    background: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.4);
    color: #38bdf8;
    font-weight: 600;
}

.chip.benchmark:hover {
    background: rgba(6, 182, 212, 0.25);
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 12px;
    padding: 1.5rem;
    max-width: 600px;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    font-weight: 500;
}

.form-input, .form-textarea {
    width: 100%;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    color: #fff;
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.form-input:focus, .form-textarea:focus {
    border-color: var(--accent-cyan);
}

.submit-btn {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: opacity 0.2s;
}

.submit-btn:hover {
    opacity: 0.9;
}

footer {
    text-align: center;
    color: #64748b;
    font-size: 0.85rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
}