:root {
    --bg-primary: #080d16;
    --bg-secondary: #0d1526;
    --bg-card: #111827;
    --accent: #5b8ef0;
    --accent-glow: rgba(91, 142, 240, 0.25);
    --accent-2: #00c9a7;
    --text: #d1ddf5;
    --text-muted: #6b7fa6;
    --border: rgba(255, 255, 255, 0.07);
    --gradient: linear-gradient(135deg, #5b8ef0, #00c9a7);
}

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

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-primary);
    color: var(--text);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ── Navbar ── */
#mainNav {
    background: rgba(8, 13, 22, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all 0.35s ease;
}

#mainNav.scrolled {
    background: rgba(8, 13, 22, 0.97);
    border-bottom-color: var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.03em;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.45rem 1rem !important;
    transition: color 0.25s;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text) !important;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 55%;
}

.nav-link.blog-link {
    color: var(--accent) !important;
    border: 1px solid rgba(91, 142, 240, 0.35);
    border-radius: 20px;
    margin-left: 0.5rem;
    transition: all 0.25s;
}

.nav-link.blog-link:hover {
    background: rgba(91, 142, 240, 0.1);
    color: var(--text) !important;
}

.nav-link.blog-link::after { display: none; }

.navbar-toggler {
    border: none !important;
    box-shadow: none !important;
    color: var(--text-muted);
    background: transparent !important;
}

@media (max-width: 991px) {
    .navbar-collapse {
        background: rgba(8, 13, 22, 0.98);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 0.75rem 1rem;
        margin-top: 0.5rem;
    }
}

/* ── Hero ── */
.hero-section {
    min-height: 100vh;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(91, 142, 240, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91, 142, 240, 0.025) 1px, transparent 1px);
    background-size: 64px 64px;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.12;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 550px;
    height: 550px;
    background: var(--accent);
    top: -150px;
    right: -150px;
    animation-delay: 0s;
}

.orb-2 {
    width: 420px;
    height: 420px;
    background: var(--accent-2);
    bottom: -120px;
    left: -120px;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-30px); }
}

.hero-content { position: relative; z-index: 2; }

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 1rem;
    background: rgba(0, 201, 167, 0.08);
    border: 1px solid rgba(0, 201, 167, 0.3);
    border-radius: 50px;
    color: var(--accent-2);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1.5rem;
}

.tag-dot {
    width: 7px;
    height: 7px;
    background: var(--accent-2);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-name {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #e0eaff 0%, #5b8ef0 50%, #00c9a7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.2vw, 1.25rem);
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 480px;
}

.btn-primary-custom {
    background: var(--gradient);
    border: none;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    color: #fff;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary-custom:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-outline-custom {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    color: var(--text);
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s;
}

.btn-outline-custom:hover {
    color: var(--accent);
    border-color: rgba(91, 142, 240, 0.5);
    transform: translateY(-2px);
}

.social-links a {
    color: var(--text-muted);
    font-size: 1.35rem;
    margin-right: 1.1rem;
    text-decoration: none;
    transition: all 0.25s;
    display: inline-block;
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

/* ── Sections ── */
section { padding: 5.5rem 0; }

.section-label {
    font-family: 'Courier New', monospace;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 3rem;
}

.section-title span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-sep {
    height: 1px;
    background: var(--border);
}

/* ── Cards ── */
.card-custom {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    transition: all 0.3s ease;
    height: 100%;
}

.card-custom:hover {
    border-color: rgba(91, 142, 240, 0.35);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* ── About Stats ── */
.stat-item {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    transition: all 0.3s;
}

.stat-item:hover {
    border-color: rgba(91, 142, 240, 0.3);
    transform: translateY(-3px);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.3rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Timeline ── */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-2), transparent);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2.75rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    transition: all 0.3s;
}

.timeline-item:hover {
    border-color: rgba(91, 142, 240, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.57rem;
    top: 1.45rem;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(91, 142, 240, 0.3);
    z-index: 1;
}

.timeline-date {
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    margin-bottom: 0.4rem;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.2rem;
}

.timeline-org {
    color: var(--accent-2);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
}

.timeline-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ── Volunteering Cards ── */
.vol-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    height: 100%;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.vol-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient);
    border-radius: 16px 16px 0 0;
}

.vol-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    border-color: rgba(91, 142, 240, 0.3);
}

.vol-role {
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    font-family: 'Courier New', monospace;
}

.vol-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.vol-org {
    color: var(--accent-2);
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 0.85rem;
}

.vol-desc {
    color: var(--text-muted);
    font-size: 0.87rem;
    line-height: 1.65;
}

/* ── Skills ── */
.skill-category-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-category-label i { color: var(--accent); font-size: 1rem; }

.skill-badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.82rem;
    color: var(--text);
    margin: 0.2rem;
    transition: all 0.2s ease;
    cursor: default;
}

.skill-badge:hover {
    background: rgba(91, 142, 240, 0.1);
    border-color: rgba(91, 142, 240, 0.4);
    color: var(--accent);
    transform: translateY(-1px);
}

/* ── Language Bars ── */
.lang-item { margin-bottom: 1.3rem; }
.lang-item:last-child { margin-bottom: 0; }

.lang-name {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.92rem;
    font-weight: 500;
}

.lang-level {
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.lang-bar {
    height: 4px;
    background: rgba(255,255,255,0.06);
    border-radius: 4px;
    overflow: hidden;
}

.lang-bar-fill {
    height: 100%;
    width: 0%;
    border-radius: 4px;
    background: var(--gradient);
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Cert Card ── */
.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s;
}

.cert-card:hover {
    border-color: rgba(91, 142, 240, 0.4);
    transform: translateX(6px);
}

.cert-icon {
    width: 48px;
    height: 48px;
    background: rgba(91, 142, 240, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.cert-name {
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
}

.cert-meta {
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-top: 0.15rem;
}

/* ── Footer ── */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 2.5rem 0;
    text-align: center;
}

footer .brand {
    font-size: 1.1rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
    display: block;
}

footer .copy {
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-top: 0.75rem;
}

/* ── Fade-in animation ── */
.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }
.fade-in.delay-4 { transition-delay: 0.4s; }

/* ── Blog coming soon ── */
.coming-soon-icon {
    font-size: 4.5rem;
    color: var(--accent-2);
    margin-bottom: 1.5rem;
    display: block;
    animation: float 4s ease-in-out infinite;
}