:root {
    --bg-primary:   #0a0e14;
    --bg-secondary: #0d1117;
    --bg-tertiary:  #161b27;
    --bg-card:      #131a26;
    --accent-green:  #00ff9f;
    --accent-cyan:   #00d4ff;
    --accent-purple: #a78bfa;
    --accent-red:    #ff3366;
    --text-primary:  #e2e8f0;
    --text-secondary:#64748b;
    --text-muted:    #4a5568;
    --border-color:  #1e2a3a;
    --border-hover:  #2a3f55;
    --glow-green: rgba(0, 255, 159, 0.35);
    --glow-cyan:  rgba(0, 212, 255, 0.35);
}

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

body {
    font-family: 'Fira Code', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ── Matrix rain ── */
.matrix-bg {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none; z-index: 0; opacity: 0.03;
}
.matrix-column {
    position: absolute; top: -100%;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px; color: var(--accent-green);
    animation: matrix-fall linear infinite;
}
@keyframes matrix-fall {
    0%   { top: -100%; opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

/* ── Scanline ── */
.scanline {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(0,255,159,0.015) 51%);
    background-size: 100% 4px;
    pointer-events: none; z-index: 1;
    animation: scanmove 8s linear infinite;
}
@keyframes scanmove {
    0%   { transform: translateY(0); }
    100% { transform: translateY(4px); }
}

/* ── Container ── */
.container {
    max-width: 1400px; margin: 0 auto;
    padding: 0 40px; position: relative; z-index: 2;
}

/* ── Navigation ── */
nav {
    position: fixed; top: 0; left: 0; right: 0;
    background: rgba(10,14,20,0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000; padding: 20px 0;
}
nav .container { display: flex; justify-content: space-between; align-items: center; }
.nav-content   { display: flex; align-items: center; gap: 40px; }

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 800; font-size: 20px;
    color: var(--accent-green);
    text-shadow: 0 0 20px var(--glow-green);
    animation: pulse-glow 2s ease-in-out infinite;
}
@keyframes pulse-glow {
    0%,100% { text-shadow: 0 0 20px var(--glow-green); }
    50%      { text-shadow: 0 0 30px var(--glow-green), 0 0 40px var(--glow-green); }
}

.nav-links { display: flex; gap: 40px; list-style: none; }
.nav-links a {
    color: var(--text-secondary); text-decoration: none;
    font-size: 14px; font-weight: 500; transition: all 0.3s ease; position: relative;
}
.nav-links a::before { content: '> '; opacity: 0; margin-right: -10px; transition: all 0.3s ease; color: var(--accent-cyan); }
.nav-links a:hover::before { opacity: 1; margin-right: 5px; }
.nav-links a:hover { color: var(--accent-cyan); }

.resume-btn {
    padding: 10px 25px; background: transparent;
    border: 1px solid var(--accent-cyan); color: var(--accent-cyan);
    font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 600;
    text-decoration: none; border-radius: 4px;
    transition: all 0.3s ease; display: flex; align-items: center; gap: 8px;
}
.resume-btn:hover {
    background: var(--accent-cyan); color: var(--bg-primary);
    box-shadow: 0 0 16px var(--glow-cyan); transform: translateY(-2px);
}
.resume-btn svg { width: 16px; height: 16px; }

/* ── Hero ── */
.hero {
    display: flex; align-items: center;
    padding: 120px 0 80px; position: relative; min-height: 600px;
}
.hero-content { max-width: 800px; }
.hero-tag {
    color: var(--accent-cyan); font-size: 16px; margin-bottom: 20px;
    opacity: 0; animation: fadeInUp 0.8s ease forwards;
}
.hero h1 {
    font-family: 'JetBrains Mono', monospace; font-size: 72px;
    font-weight: 800; line-height: 1.1; margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    opacity: 0; animation: fadeInUp 0.8s ease 0.2s forwards;
}
.hero p {
    font-size: 18px; color: var(--text-secondary); margin-bottom: 40px;
    max-width: 600px; opacity: 0; animation: fadeInUp 0.8s ease 0.4s forwards;
}
.cta-buttons {
    display: flex; gap: 16px; opacity: 0; animation: fadeInUp 0.8s ease 0.6s forwards;
}

/* Buttons */
.btn {
    padding: 12px 28px; font-family: 'JetBrains Mono', monospace;
    font-size: 13px; font-weight: 600; text-decoration: none;
    border: 1px solid; border-radius: 4px;
    cursor: pointer; transition: all 0.3s ease; position: relative; overflow: hidden;
}
.btn-primary { background: transparent; border-color: var(--accent-green); color: var(--accent-green); }
.btn-primary::before {
    content: ''; position: absolute; top: 0; left: -100%;
    width: 100%; height: 100%; background: var(--accent-green);
    transition: left 0.3s ease; z-index: -1;
}
.btn-primary:hover::before { left: 0; }
.btn-primary:hover { color: var(--bg-primary); box-shadow: 0 0 20px var(--glow-green); }

.btn-secondary { background: transparent; border-color: var(--accent-cyan); color: var(--accent-cyan); }
.btn-secondary::before {
    content: ''; position: absolute; top: 0; left: -100%;
    width: 100%; height: 100%; background: var(--accent-cyan);
    transition: left 0.3s ease; z-index: -1;
}
.btn-secondary:hover::before { left: 0; }
.btn-secondary:hover { color: var(--bg-primary); box-shadow: 0 0 20px var(--glow-cyan); }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Terminal cursor */
.cursor {
    display: inline-block; width: 12px; height: 28px;
    background: var(--accent-green); animation: blink 1s step-end infinite; margin-left: 5px;
}
@keyframes blink { 0%,50% { opacity: 1; } 51%,100% { opacity: 0; } }

/* ── Sections ── */
section { padding: 80px 0; position: relative; }
.section-header { margin-bottom: 60px; }
.section-tag { color: var(--accent-cyan); font-size: 13px; margin-bottom: 14px; font-weight: 600; letter-spacing: 0.05em; }
.section-title {
    font-family: 'JetBrains Mono', monospace; font-size: 46px;
    font-weight: 800; color: var(--text-primary);
    position: relative; display: inline-block;
}
.section-title::after {
    content: ''; position: absolute; bottom: -10px; left: 0;
    width: 80px; height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
}

/* ── About ── */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-text { font-size: 16px; line-height: 1.9; color: var(--text-secondary); }
.about-text p { margin-bottom: 20px; }

/* Terminal box */
.terminal-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px; overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    position: relative;
}
.terminal-box::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-green), transparent);
    background-size: 200% 100%; animation: scanline 3s linear infinite; z-index: 1;
}
@keyframes scanline {
    0%   { background-position: -200% 0; }
    100% { background-position:  200% 0; }
}
.terminal-header {
    background: var(--bg-tertiary); padding: 10px 14px;
    display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--border-color);
}
.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red    { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green  { background: #27c93f; }
.terminal-body { padding: 22px; font-size: 13px; line-height: 1.85; }
.terminal-line { margin-bottom: 8px; }
.terminal-prompt  { color: var(--accent-green); }
.terminal-command { color: var(--accent-cyan); }
.terminal-output  { color: var(--text-secondary); margin-left: 18px; }

/* ── Skills ── */
.skills-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px;
}
.skill-category {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px; padding: 0;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative; overflow: hidden;
}
.skill-category::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-green), transparent);
    background-size: 200% 100%; animation: scanline 3s linear infinite; z-index: 1;
    transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
}
.skill-category:hover::before { transform: scaleX(1); }
.skill-category:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,212,255,0.08);
}

.skill-titlebar {
    background: var(--bg-tertiary); padding: 10px 14px;
    display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--border-color);
}
.skill-titlebar .tdots { display: flex; gap: 6px; }
.skill-titlebar .td  { width: 10px; height: 10px; border-radius: 50%; }
.skill-titlebar .td-r{ background: #ff5f56; }
.skill-titlebar .td-y{ background: #ffbd2e; }
.skill-titlebar .td-g{ background: #27c93f; }

.skill-body { padding: 18px 18px 20px; }
.skill-category h3 {
    font-family: 'JetBrains Mono', monospace; font-size: 14px; font-weight: 700;
    margin-bottom: 14px; color: var(--accent-cyan);
    display: flex; align-items: center; gap: 10px; letter-spacing: 0.03em;
}
.skill-icon { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; }
.skill-icon svg { width: 18px; height: 18px; stroke: var(--accent-cyan); }

.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag {
    padding: 4px 10px;
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 3px; font-size: 11px; color: var(--text-secondary);
    font-family: 'Fira Code', monospace;
    transition: color 0.2s, border-color 0.2s;
}
.skill-category:hover .skill-tag { color: #94a3b8; border-color: var(--border-hover); }
.skill-tag:hover { color: var(--accent-green) !important; border-color: var(--accent-green) !important; }

/* ── Certificates ── */
.certificates-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px;
}
.certificate-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px; overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}
.certificate-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-green), var(--accent-cyan), transparent);
    background-size: 200% 100%; animation: scanline 4s linear infinite; z-index: 1;
}
.certificate-card::after {
    content: ''; position: absolute; inset: 0; border-radius: 6px; opacity: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.04) 0%, transparent 65%);
    transition: opacity 0.3s; pointer-events: none;
}
.certificate-card:hover::after { opacity: 1; }
.certificate-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0,212,255,0.25);
    box-shadow: 0 18px 40px rgba(0,212,255,0.07);
}

.cert-titlebar {
    background: var(--bg-tertiary); padding: 10px 14px;
    display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--border-color);
}
.cert-titlebar .tdots { display: flex; gap: 6px; }
.cert-titlebar .td  { width: 10px; height: 10px; border-radius: 50%; }
.cert-titlebar .td-r{ background: #ff5f56; }
.cert-titlebar .td-y{ background: #ffbd2e; }
.cert-titlebar .td-g{ background: #27c93f; }
.cert-path { font-size: 10px; color: var(--text-muted); font-family: 'Fira Code', monospace; margin-left: 4px; }
.cert-path span { color: var(--accent-cyan); }

.cert-body { padding: 16px 18px 20px; }

.cert-icon {
    width: 44px; height: 44px;
    background: rgba(0,255,159,0.08);
    border: 1px solid rgba(0,255,159,0.3);
    border-radius: 6px; display: flex; align-items: center; justify-content: center;
    margin-bottom: 14px; transition: all 0.3s ease;
}
.cert-icon svg { width: 22px; height: 22px; stroke: var(--accent-green); fill: none; stroke-width: 2; }
.certificate-card:hover .cert-icon { border-color: var(--accent-cyan); background: rgba(0,212,255,0.08); }
.certificate-card:hover .cert-icon svg { stroke: var(--accent-cyan); }

.certificate-card h3 { font-size: 15px; margin-bottom: 8px; color: var(--text-primary); line-height: 1.4; }
.cert-issuer { color: var(--accent-cyan); font-size: 12px; margin-bottom: 4px; }
.cert-date   { color: var(--text-muted); font-size: 11px; font-family: 'Fira Code', monospace; }

/* ── Projects ── */
.projects-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); gap: 24px;
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px; overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}
.project-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), #0070ff, var(--accent-cyan), transparent);
    background-size: 200% 100%; animation: scanline 3s linear infinite; z-index: 1;
}
.project-card::after {
    content: ''; position: absolute; inset: 0; opacity: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.05) 0%, transparent 65%);
    transition: opacity 0.3s; pointer-events: none;
}
.project-card:hover::after { opacity: 1; }
.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0,212,255,0.25);
    box-shadow: 0 24px 48px rgba(0,212,255,0.07), 0 0 0 1px rgba(0,212,255,0.1);
}

.project-header {
    background: var(--bg-tertiary); padding: 10px 14px;
    display: flex; align-items: center; gap: 10px;
    border-bottom: 1px solid var(--border-color);
}
.card-dots { display: flex; gap: 6px; }
.card-dot  { width: 10px; height: 10px; border-radius: 50%; }
.card-dot-r{ background: #ff5f56; }
.card-dot-y{ background: #ffbd2e; }
.card-dot-g{ background: #27c93f; }
.card-path { font-size: 10px; color: var(--text-muted); font-family: 'Fira Code', monospace; margin-left: 2px; }
.card-path span { color: var(--accent-cyan); }

.badge-row { padding: 13px 18px 0; display: flex; gap: 7px; flex-wrap: wrap; }
.badge {
    font-size: 9px; font-weight: 700; letter-spacing: 0.12em;
    text-transform: uppercase; padding: 3px 8px; border-radius: 3px; border: 1px solid;
}
.badge-type     { color: var(--accent-cyan);   border-color: rgba(0,212,255,0.3);  background: rgba(0,212,255,0.07); }
.badge-security { color: var(--accent-purple);  border-color: rgba(167,139,250,0.3); background: rgba(167,139,250,0.07); }
.badge-wip      { color: #fbbf24;               border-color: rgba(251,191,36,0.3);  background: rgba(251,191,36,0.07); }
.badge-fullstack{ color: var(--accent-green);   border-color: rgba(0,255,159,0.3);  background: rgba(0,255,159,0.07); }
.badge-ai       { color: #f472b6;               border-color: rgba(244,114,182,0.3); background: rgba(244,114,182,0.07); }

.project-body { padding: 13px 18px 18px; }
.card-prompt { font-size: 10px; color: var(--text-muted); font-family: 'Fira Code', monospace; margin-bottom: 6px; }
.card-prompt span { color: #27c93f; }

.project-header h3,
.project-card h3 {
    font-family: 'JetBrains Mono', monospace; font-size: 20px; font-weight: 700;
    color: var(--text-primary); margin-bottom: 10px; line-height: 1.2; letter-spacing: -0.01em;
}
.project-card h3 em { color: var(--accent-cyan); font-style: normal; }

.project-description {
    font-size: 11.5px; color: var(--text-secondary);
    line-height: 1.75; margin-bottom: 14px; font-family: 'Fira Code', monospace;
}
.project-description .hl { color: #94a3b8; }

.feature-label { font-size: 9px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 7px; }
.feature-list  { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.feature-item  {
    font-size: 10.5px; color: var(--text-muted); font-family: 'Fira Code', monospace;
    display: flex; align-items: center; gap: 8px; transition: color 0.2s;
}
.feature-item::before { content: '→'; color: rgba(0,212,255,0.4); transition: color 0.2s; flex-shrink: 0; }
.project-card:hover .feature-item { color: var(--text-secondary); }
.project-card:hover .feature-item::before { color: var(--accent-cyan); }

.tech-label { font-size: 9px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 7px; margin-top: 12px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.tech-badge {
    font-size: 10px; color: #7c8ea6;
    background: var(--bg-card); border: 1px solid var(--border-color);
    padding: 3px 9px; border-radius: 3px; font-family: 'Fira Code', monospace;
    transition: color 0.2s, border-color 0.2s;
}
.project-card:hover .tech-badge { color: #94a3b8; border-color: var(--border-hover); }

.card-divider { height: 1px; background: var(--border-color); margin-bottom: 14px; }

.project-links { display: flex; gap: 10px; }
.project-link {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 11px; text-decoration: none; padding: 6px 14px; border-radius: 4px;
    font-family: 'Fira Code', monospace; font-weight: 500; transition: all 0.2s;
}
.project-link-primary {
    color: var(--bg-primary); background: var(--accent-cyan); border: 1px solid var(--accent-cyan);
}
.project-link-primary:hover { background: #22ddff; box-shadow: 0 0 14px rgba(0,212,255,0.45); }
.project-link-ghost {
    color: var(--text-secondary); background: transparent; border: 1px solid var(--border-color);
}
.project-link-ghost:hover { color: #94a3b8; border-color: var(--border-hover); background: var(--bg-card); }

.project-link:not(.project-link-primary):not(.project-link-ghost) {
    color: var(--accent-cyan); font-size: 13px; transition: all 0.3s ease;
    border: 1px solid var(--border-color); border-radius: 4px; padding: 6px 12px;
    background: transparent;
}
.project-link:not(.project-link-primary):not(.project-link-ghost):hover {
    color: var(--bg-primary); background: var(--accent-cyan); border-color: var(--accent-cyan);
}

/* ── Contact ── */
.contact-content { max-width: 860px; margin: 0 auto; }
.contact-intro { text-align: center; font-size: 17px; color: var(--text-secondary); margin-bottom: 50px; line-height: 1.75; }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; margin-bottom: 60px; }

.contact-method {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: 6px; overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}
.contact-method::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-green), var(--accent-cyan), transparent);
    background-size: 200% 100%; animation: scanline 4s linear infinite; z-index: 1;
}
.contact-method:hover {
    border-color: rgba(0,212,255,0.25);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,212,255,0.07);
}

.contact-titlebar {
    background: var(--bg-tertiary); padding: 10px 14px;
    display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--border-color);
}
.contact-titlebar .tdots { display: flex; gap: 6px; }
.contact-titlebar .td   { width: 10px; height: 10px; border-radius: 50%; }
.contact-titlebar .td-r { background: #ff5f56; }
.contact-titlebar .td-y { background: #ffbd2e; }
.contact-titlebar .td-g { background: #27c93f; }

.contact-body { padding: 20px 22px 22px; text-align: center; }

.contact-icon {
    width: 50px; height: 50px; margin: 0 auto 14px;
    background: rgba(0,255,159,0.08); border: 1px solid rgba(0,255,159,0.3);
    border-radius: 6px; display: flex; align-items: center; justify-content: center;
    transition: all 0.3s ease;
}
.contact-icon svg {
    width: 24px; height: 24px; stroke: var(--accent-green);
    fill: none; stroke-width: 2; transition: all 0.3s ease;
}
.contact-method:hover .contact-icon { border-color: var(--accent-cyan); background: rgba(0,212,255,0.08); }
.contact-method:hover .contact-icon svg { stroke: var(--accent-cyan); }

.contact-method h3 { font-size: 15px; color: var(--text-primary); font-family: 'JetBrains Mono', monospace; }

.contact-icon-link { display: inline-block; text-decoration: none; margin-bottom: 14px; }
.contact-icon-link:hover .contact-icon {
    border-color: var(--accent-cyan); background: rgba(0,212,255,0.08);
    transform: scale(1.12);
}
.contact-icon-link:hover .contact-icon svg { stroke: var(--accent-cyan); }

/* ── Footer ── */
footer { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 36px 0; text-align: center; }
footer p { color: var(--text-secondary); font-size: 13px; }
.footer-text { color: var(--accent-cyan); }

.hl { color: #94a3b8; }

/* ── Responsive ── */
/* ── Hamburger button ── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    background: transparent;
    border: 1px solid rgba(0, 255, 65, 0.25);
    border-radius: 4px;
    cursor: pointer;
    padding: 6px;
    transition: border-color 0.3s ease;
    z-index: 1001;
}
.hamburger:hover { border-color: var(--accent-green); }
.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--accent-green);
    border-radius: 2px;
    transition: transform 0.35s ease, opacity 0.25s ease, width 0.3s ease;
    transform-origin: center;
}
/* X state */
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile menu overlay ── */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 999;
    background: rgba(0, 0, 0, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}
/* border-top scanline effect */
.mobile-menu::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--accent-green);
    box-shadow: 0 0 12px var(--accent-green);
}
.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 40px;
}
.mobile-nav-links li {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.mobile-menu.open .mobile-nav-links li { opacity: 1; transform: translateY(0); }
.mobile-menu.open .mobile-nav-links li:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open .mobile-nav-links li:nth-child(2) { transition-delay: 0.10s; }
.mobile-menu.open .mobile-nav-links li:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-nav-links li:nth-child(4) { transition-delay: 0.20s; }
.mobile-menu.open .mobile-nav-links li:nth-child(5) { transition-delay: 0.25s; }

.mobile-nav-link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 1px;
    padding: 12px 24px;
    display: block;
    transition: color 0.2s ease;
}
.mobile-nav-link::before { content: '> '; color: var(--accent-cyan); opacity: 0; transition: opacity 0.2s; }
.mobile-nav-link:hover { color: var(--accent-green); }
.mobile-nav-link:hover::before { opacity: 1; }

.mobile-resume-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    letter-spacing: 1px;
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
    padding: 10px 28px;
    text-decoration: none;
    border-radius: 4px;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.3s ease 0.30s, transform 0.3s ease 0.30s, background 0.2s, color 0.2s;
}
.mobile-menu.open .mobile-resume-btn { opacity: 1; transform: translateY(0); }
.mobile-resume-btn:hover { background: var(--accent-green); color: var(--bg-primary); }

/* ── Scroll indicator ── */
.hero { position: relative; }
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    opacity: 0;
    animation: fadeInScroll 1s ease 1.8s forwards;
    transition: opacity 0.4s ease;
    cursor: pointer;
    user-select: none;
}
.scroll-indicator.hidden { opacity: 0 !important; pointer-events: none; }
.scroll-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-secondary);
    opacity: 0.5;
}
.scroll-chevrons {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.scroll-chevrons svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent-green);
    stroke-width: 2;
    opacity: 0;
}
.scroll-chevrons svg:nth-child(1) { animation: chevronPulse 1.6s ease-in-out 2s infinite; }
.scroll-chevrons svg:nth-child(2) { animation: chevronPulse 1.6s ease-in-out 2.2s infinite; }

@keyframes fadeInScroll {
    to { opacity: 1; }
}
@keyframes chevronPulse {
    0%, 100% { opacity: 0; transform: translateY(-4px); }
    50%       { opacity: 0.7; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .nav-content { display: none; }
    .hamburger { display: flex; }
    .mobile-menu { display: flex; }
    .hero h1 { font-size: 44px; }
    .hero p  { font-size: 15px; }
    .about-content { grid-template-columns: 1fr; }
    .section-title { font-size: 34px; }
    .projects-grid, .certificates-grid { grid-template-columns: 1fr; }
    .cta-buttons { flex-direction: column; }
    .btn { width: 100%; text-align: center; }
    .scroll-indicator { bottom: 20px; }
}

/* ── Scroll reveal ── */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* ── Scroll Indicator ─────────────────────────────── */
#scroll-indicator {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #00ff88, #00d4ff);
  z-index: 9999;
  transition: width 0.1s linear;
  box-shadow: 0 0 6px #00ff8866;
}

/* ── Hamburger Button ─────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
  margin-left: auto;
}

.hamburger .bar {
  display: block;
  width: 22px;
  height: 2px;
  background: #00ff88;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Animate to X when open */
.hamburger.open .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open .bar:nth-child(2) {
  opacity: 0;
}
.hamburger.open .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Nav ───────────────────────────────────── */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-content {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 75%;
    max-width: 300px;
    height: 100vh;
    background: rgba(5, 5, 15, 0.97);
    backdrop-filter: blur(12px);
    border-left: 1px solid rgba(0, 255, 136, 0.15);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 32px 40px;
    gap: 28px;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-content.open {
    display: flex;
    transform: translateX(0);
  }

  .nav-links {
    flex-direction: column;
    gap: 20px;
    width: 100%;
  }

  .nav-links li a {
    font-size: 1.1rem;
    padding: 6px 0;
    display: block;
    border-bottom: 1px solid rgba(0, 255, 136, 0.08);
  }

  .resume-btn {
    margin-top: 8px;
    width: 100%;
    justify-content: center;
  }

  /* Overlay backdrop */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

  .nav-overlay.open {
    display: block;
  }
}