/* ================================================================
   portfolio.css — Pasindu Liyanapathirana
   Structure inspired by nimila.online | Green-dark particles theme
   ================================================================ */

/* ── Reset & base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-primary:    #050e07;
    --bg-secondary:  #0c1a0f;
    --bg-card:       #101f14;
    --bg-card-hover: #162a1a;
    --accent:        #38ef7d;
    --accent-dark:   #11998e;
    --accent-dim:    rgba(56, 239, 125, 0.15);
    --text-primary:  #f0f4f1;
    --text-muted:    #8aa393;
    --border:        rgba(56, 239, 125, 0.15);
    --border-hover:  rgba(56, 239, 125, 0.45);
    --nav-height:    64px;
    --radius:        12px;
    --radius-sm:     8px;
    --transition:    0.3s ease;
    --font-main:     'Rubik', 'Nunito Sans', Arial, sans-serif;
    --font-mono:     'Fira Code', 'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
strong { color: var(--accent); }

/* ── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-dark); border-radius: 3px; }

/* ── Navbar ───────────────────────────────────────────────────── */
#navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2.5rem;
    z-index: 1000;
    transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
    background: rgba(5, 14, 7, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border);
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    object-position: top center;
    border: 2px solid var(--accent-dark);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.nav-logo:hover .nav-avatar {
    border-color: var(--accent-dark);
    box-shadow: 0 0 10px rgba(56, 239, 125, 0.4);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}
.nav-links a {
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    background: var(--accent-dim);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ─────────────────────────────────────────────────────── */
#home {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#particles-js {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #000c05 0%, #0a1a0e 50%, #050e07 100%);
    z-index: 0;
}

canvas { display: block; vertical-align: bottom; }

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 1.5rem;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.1rem;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-name {
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.5px;
}
.name-first { color: #fff; }
.name-last  { color: var(--accent); }

.hero-typing {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: #b0cfbb;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.prompt { color: var(--accent); }

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 0.4rem;
}

.btn-primary {
    padding: 0.7rem 1.6rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #050e07;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: opacity var(--transition), transform var(--transition);
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-2px); }

.btn-secondary {
    padding: 0.7rem 1.6rem;
    border: 1.5px solid var(--accent);
    color: var(--accent);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: background var(--transition), color var(--transition), transform var(--transition);
}
.btn-secondary:hover {
    background: var(--accent-dim);
    transform: translateY(-2px);
}

/* Terminal widget */
.hero-terminal {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    width: 100%;
    max-width: 520px;
    text-align: left;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    backdrop-filter: blur(8px);
}
.terminal-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid var(--border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green-dot { background: #28c840; }
.terminal-title { flex: 1; text-align: center; font-size: 0.72rem; color: var(--text-muted); }
.terminal-body { padding: 12px 16px; line-height: 1.6; }
.term-prompt { margin-bottom: 6px; }
.term-user   { color: var(--accent); }
.term-at     { color: var(--text-muted); }
.term-host   { color: #7dd3a8; }
.term-tilde  { color: var(--text-muted); }
.term-cmd    { color: #e2e8f0; }
.term-output { color: #8aa393; padding-left: 0.5rem; }
.term-output div { margin-bottom: 2px; }

/* Scroll arrow */
.scroll-down {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: var(--accent);
    font-size: 1.6rem;
    animation: bounce 1.8s infinite;
    opacity: 0.7;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(8px); }
}

/* ── Shared section styles ────────────────────────────────────── */
section:not(#home) {
    padding: 6rem 0;
}

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    border-radius: 2px;
    margin-top: 0.5rem;
}

.section-subtitle {
    color: var(--text-muted);
    margin: 1rem 0 1.8rem;
    font-size: 1rem;
    max-width: 600px;
}

.sub-title {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin: 2.5rem 0 1rem;
}

.btn-outline {
    display: inline-block;
    padding: 0.6rem 1.4rem;
    border: 1.5px solid var(--border-hover);
    color: var(--accent);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    transition: background var(--transition), transform var(--transition);
    margin-bottom: 0.5rem;
}
.btn-outline:hover { background: var(--accent-dim); transform: translateY(-1px); }

/* ── About ────────────────────────────────────────────────────── */
#about { background: var(--bg-secondary); }

.about-bio {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.97rem;
    line-height: 1.8;
}

.highlights-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.highlights-list li {
    padding-left: 1.4rem;
    position: relative;
    color: var(--text-muted);
    font-size: 0.95rem;
}
.highlights-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.75rem;
}
.skill-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 1rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
    transition: border-color var(--transition), background var(--transition);
}
.skill-item:hover { border-color: var(--accent); background: var(--bg-card-hover); }

.edu-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem 1.5rem;
}
.edu-degree { font-weight: 600; font-size: 1rem; margin-bottom: 0.25rem; }
.edu-school { color: var(--accent); font-size: 0.9rem; margin-bottom: 0.2rem; }
.edu-date   { color: var(--text-muted); font-size: 0.85rem; }

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.tech-stack span {
    background: var(--accent-dim);
    border: 1px solid var(--border);
    color: var(--accent);
    border-radius: 20px;
    padding: 0.3rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 500;
    font-family: var(--font-mono);
    transition: background var(--transition);
}
.tech-stack span:hover { background: rgba(56, 239, 125, 0.28); }

/* ── Resume ───────────────────────────────────────────────────── */
#resume { background: var(--bg-primary); }

.timeline {
    position: relative;
    padding-left: 1.5rem;
    border-left: 2px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
.timeline-item {
    position: relative;
}
.timeline-dot {
    position: absolute;
    left: calc(-1.5rem - 1px);
    top: 0.35rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(56, 239, 125, 0.5);
    transform: translateX(-50%);
}
.timeline-content h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}
.timeline-meta {
    font-size: 0.82rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}
.timeline-content p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 0.75rem;
}
.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.timeline-tags span {
    background: var(--accent-dim);
    border: 1px solid var(--border);
    color: var(--accent);
    border-radius: 4px;
    padding: 0.15rem 0.55rem;
    font-size: 0.76rem;
    font-family: var(--font-mono);
}

/* ── Blog ─────────────────────────────────────────────────────── */
#blog { background: var(--bg-secondary); }

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.2rem;
    margin-top: 2rem;
}

.blog-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.4rem;
    transition: border-color var(--transition), background var(--transition), transform var(--transition);
    cursor: pointer;
}
.blog-card:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateY(-3px);
}
.blog-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.blog-card h4 {
    font-size: 0.97rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    flex: 1;
}
.blog-card p {
    font-size: 0.84rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
}
.blog-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: auto;
}

/* ── Contact ──────────────────────────────────────────────────── */
#contact { background: var(--bg-primary); }

.contact-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.4rem;
    transition: border-color var(--transition), background var(--transition);
    min-width: 240px;
}
.contact-card:hover { border-color: var(--accent); background: var(--bg-card-hover); }
.contact-card i { font-size: 1.4rem; color: var(--accent); }
.contact-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}
.contact-value {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
}
.social-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem 1rem;
    transition: border-color var(--transition), background var(--transition), transform var(--transition);
    text-align: center;
}
.social-item:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateY(-3px);
}
.social-item i, .social-item .fiverr-icon {
    font-size: 1.5rem;
    color: var(--accent);
}
.fiverr-icon { width: 22px; height: 22px; }
.social-label  { font-size: 0.82rem; font-weight: 600; color: var(--text-primary); }
.social-handle { font-family: var(--font-mono); font-size: 0.73rem; color: var(--text-muted); }

/* ── Footer ───────────────────────────────────────────────────── */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 2rem 1rem;
}
footer p { color: var(--text-primary); font-weight: 500; }
.footer-sub { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.25rem; }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
    #navbar { padding: 0 1.25rem; }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0; right: 0;
        background: rgba(5, 14, 7, 0.97);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 1rem 1.5rem 2rem;
        gap: 0.25rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.35s ease, opacity 0.35s ease;
        z-index: 999;
    }
    .nav-links.open { transform: translateY(0); opacity: 1; }
    .nav-toggle { display: flex; }

    .hero-terminal { display: none; }

    section:not(#home) { padding: 4rem 0; }

    .blog-grid { grid-template-columns: 1fr; }
    .social-grid { grid-template-columns: repeat(2, 1fr); }

    .timeline { padding-left: 1.1rem; }
    .timeline-dot { left: -1.35rem; }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2rem; }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
    .social-grid { grid-template-columns: 1fr 1fr; }
    .contact-card { min-width: unset; width: 100%; }
}