/* --- Reset & Variables --- */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #38bdf8; /* Muted Sky Blue */
    --accent-hover: #0ea5e9;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
}

.container { max-width: 900px; margin: 0 auto; padding: 0 2rem; }

/* --- Typography --- */
h1, h2, h3, .logo, .terminal-text, .section-title { font-family: var(--font-mono); font-weight: 500; }
h1 { font-size: 2.5rem; margin-bottom: 0.5rem; line-height: 1.2; }
h2 { font-size: 1.5rem; color: var(--text-secondary); margin-bottom: 1rem; }
h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }

.accent { color: var(--accent); }
a { color: var(--text-primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }

/* --- Header / Nav --- */
header {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--bg-secondary);
    position: sticky;
    top: 0;
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(8px);
    z-index: 100;
}

nav { display: flex; justify-content: space-between; align-items: center; }
.logo { color: var(--accent); font-size: 1rem; }

nav ul { display: flex; list-style: none; gap: 2rem; }
nav ul li a { font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-secondary); }
nav ul li a:hover { color: var(--accent); }

/* --- Hero Section --- */
.hero { padding: 6rem 0 4rem; }
.terminal-text { color: var(--accent); font-size: 0.9rem; margin-bottom: 1.5rem; opacity: 0.8; }
#typing-cursor { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.subtitle { color: var(--text-secondary); font-size: 1.1rem; max-width: 650px; margin-bottom: 2rem; }

.hero-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.9rem;
}
.btn-primary:hover { background: var(--accent-hover); color: var(--bg-primary); }

.btn-secondary {
    border: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* --- Sections --- */
.section { padding: 4rem 0; border-top: 1px solid var(--bg-secondary); }
.section-title { color: var(--text-secondary); font-size: 1.2rem; margin-bottom: 2rem; }

/* --- About --- */
.content-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 3rem; }
.about-text { color: var(--text-secondary); }
.skills h3 { color: var(--accent); font-size: 0.9rem; margin-bottom: 1rem; }
.skills ul { list-style: none; }
.skills li { color: var(--text-secondary); font-family: var(--font-mono); font-size: 0.85rem; margin-bottom: 0.6rem; }

/* --- Projects --- */
.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.project-card {
    background: var(--bg-secondary);
    border: 1px solid #30363d;
    border-radius: 6px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s ease, transform 0.2s ease;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.project-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.project-header .icon { font-size: 1.2rem; }
.project-card p { color: var(--text-secondary); font-size: 0.95rem; flex-grow: 1; margin-bottom: 1.5rem; }
.project-card code { background: var(--bg-tertiary); padding: 0.1rem 0.3rem; border-radius: 3px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); }

.project-footer { display: flex; align-items: center; gap: 0.8rem; font-family: var(--font-mono); font-size: 0.8rem; flex-wrap: wrap; }
.tech-tag { color: var(--text-secondary); background: var(--bg-tertiary); padding: 0.2rem 0.5rem; border-radius: 12px; }
.project-footer a { margin-left: auto; }

/* --- Experience --- */
.timeline-item { margin-bottom: 2.5rem; padding-left: 1.5rem; border-left: 2px solid var(--bg-tertiary); }
.date { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); display: block; margin-bottom: 0.3rem; }
.timeline-item ul { margin-top: 0.5rem; padding-left: 1.2rem; color: var(--text-secondary); }
.timeline-item li { margin-bottom: 0.4rem; font-size: 0.95rem; }

/* --- Certifications --- */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.cert-item { background: var(--bg-secondary); padding: 1.5rem; border-radius: 6px; border-left: 3px solid var(--accent); }
.cert-item h3 { color: var(--text-primary); margin-bottom: 0.5rem; }
.cert-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* --- Footer --- */
footer { padding: 3rem 0; border-top: 1px solid var(--bg-secondary); text-align: center; }
.contact p:first-child { font-family: var(--font-mono); color: var(--text-secondary); margin-bottom: 1rem; }
.socials { display: flex; justify-content: center; gap: 2rem; margin: 1.5rem 0; font-family: var(--font-mono); font-size: 0.9rem; }
.copyright { font-size: 0.8rem; color: var(--text-secondary); font-family: var(--font-mono); }

/* --- Responsive --- */
@media (max-width: 768px) {
    .content-grid { grid-template-columns: 1fr; gap: 2rem; }
    h1 { font-size: 2rem; }
    nav ul { gap: 1rem; }
    .hero { padding: 4rem 0 2rem; }
    .project-footer a { margin-left: 0; width: 100%; text-align: right; margin-top: 0.5rem; }
}