:root {
    --bg: #0a0a0c;
    --card-bg: #121216;
    --text-main: #f4f4f6;
    --text-muted: #8e8e99;
    --border: #22222c;
    --accent: #ffffff;
    --glow: rgba(255, 255, 255, 0.05);
    --cursor-dot: #ffffff;
    --cursor-ring: rgba(255, 255, 255, 0.2);
}
html[data-theme="light"] {
    --bg: #fafafa;
    --card-bg: #ffffff;
    --text-main: #16161a;
    --text-muted: #6b6b76;
    --border: #e3e3e8;
    --accent: #111111;
    --glow: rgba(0, 0, 0, 0.04);
    --cursor-dot: #111111;
    --cursor-ring: rgba(0, 0, 0, 0.18);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { color-scheme: dark; }
html[data-theme="light"] { color-scheme: light; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
    transition: background-color 0.3s ease, color 0.3s ease;
}
a { color: inherit; text-decoration: none; cursor: none; }

/* Custom cursor only makes sense with a mouse. Touchscreens (phones,
   tablets, and anything without real hover) get the normal system cursor
   and normal tap behavior instead. */
@media (hover: none), (pointer: coarse) {
    body, a, .filter-btn, .toast-close, .theme-toggle { cursor: auto !important; }
    .cursor-dot, .cursor-ring { display: none !important; }
}

.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 500;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s;
}
.theme-toggle:hover { transform: scale(1.08) rotate(-8deg); border-color: rgba(255,255,255,0.3); }

.cursor-dot {
    width: 10px; height: 10px;
    background: var(--cursor-dot);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
    transition: transform 0.1s ease-out, width 0.2s, height 0.2s, background 0.2s;
}
.cursor-ring {
    width: 36px; height: 36px;
    border: 1px solid var(--cursor-ring);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}
body.hovering .cursor-dot { transform: translate(-50%, -50%) scale(0.5); background: #3b82f6; }
body.hovering .cursor-ring { width: 56px; height: 56px; border-color: rgba(59, 130, 246, 0.5); background: rgba(59, 130, 246, 0.05); }

.container { max-width: 840px; margin: 0 auto; padding: 6rem 2rem; position: relative; z-index: 2; }

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

header { 
    margin-bottom: 4rem; 
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards; 
    display: flex;
    align-items: center;
    gap: 2rem;
}
.profile-pfp {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: 2px solid var(--border);
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s;
}
.profile-pfp:hover {
    transform: scale(1.05) rotate(3deg);
    border-color: rgba(255,255,255,0.4);
}
h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 0.5rem; background: linear-gradient(135deg, var(--text-main) 30%, var(--text-muted)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
p.bio { color: var(--text-muted); font-size: 1.1rem; }

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 3rem 0 1.5rem 0;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.filters { 
    display: flex; 
    gap: 0.75rem; 
    margin-bottom: 2rem; 
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}
.filter-btn { 
    background: transparent; 
    border: 1px solid var(--border); 
    font-size: 0.85rem; 
    color: var(--text-muted); 
    cursor: none; 
    padding: 0.5rem 1rem; 
    border-radius: 20px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.filter-btn:hover, .filter-btn.active { 
    color: var(--text-main); 
    border-color: rgba(255,255,255,0.4); 
    background: rgba(255,255,255,0.03);
    transform: translateY(-2px);
}
.filter-btn.active { border-color: var(--accent); background: var(--accent); color: var(--bg); font-weight: 600; }

.project-list, .experience-list { display: flex; flex-direction: column; gap: 1.25rem; }
.project-card, .experience-card {
    background: var(--card-bg);
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s, box-shadow 0.4s;
}
.project-card::before, .experience-card::before {
    content: '';
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(255,255,255,0.03), transparent 40%);
    opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.project-card:hover::before, .experience-card:hover::before { opacity: 1; }
.project-card:hover, .experience-card:hover { 
    transform: translateY(-6px) scale(1.01); 
    border-color: rgba(255,255,255,0.25); 
    box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 30px var(--glow);
}
.project-header, .experience-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 0.75rem; }
.project-title, .experience-role { font-weight: 600; font-size: 1.2rem; letter-spacing: -0.01em; }
.project-category, .experience-time { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; background: rgba(255,255,255,0.05); padding: 0.25rem 0.6rem; border-radius: 4px; border: 1px solid var(--border); }
.project-desc, .experience-desc { color: var(--text-muted); font-size: 0.95rem; line-height: 1.5; }
.experience-org { font-size: 0.9rem; color: var(--text-main); font-weight: 500; margin-bottom: 0.5rem; }

.toast {
    position: fixed; bottom: 2rem; right: 2rem;
    background: var(--card-bg); color: var(--text-main);
    padding: 1rem 1.5rem; border-radius: 10px;
    border: 1px solid var(--border);
    display: flex; gap: 2rem; align-items: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.35);
    transform: translateY(100px) scale(0.95); opacity: 0;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.6s, background-color 0.3s, color 0.3s;
    z-index: 1000;
    max-width: calc(100vw - 3rem);
}
.toast.visible { transform: translateY(0) scale(1); opacity: 1; }
.toast-close { background: none; border: none; color: var(--text-main); font-size: 1.2rem; opacity: 0.5; transition: opacity 0.2s, transform 0.2s; flex-shrink: 0; }
.toast-close:hover { opacity: 1; transform: scale(1.1); }

/* ---- contact ---- */
.contact-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.contact-pill {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.65rem 1.15rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--card-bg);
    color: var(--text-main);
    font-size: 0.9rem;
    font-family: inherit;
    transition: border-color 0.2s, transform 0.2s;
}
.contact-pill:hover { border-color: rgba(59,130,246,0.5); transform: translateY(-2px); }
.contact-pill .copied-tag { color: #3b82f6; font-weight: 600; }

/* ---- site footer ---- */
.site-footer {
    text-align: center;
    padding: 2rem 1.5rem 3rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}
.site-footer a { color: var(--text-main); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border); }
.site-footer a:hover { text-decoration-color: var(--text-main); }

@media (max-width: 768px) {
    .container { padding: 5rem 1.5rem 4rem; }
}

@media (max-width: 600px) {
    .container { padding: 4.5rem 1.25rem 3rem; }
    .theme-toggle { top: 1rem; right: 1rem; width: 40px; height: 40px; font-size: 1rem; }
    header { flex-direction: column; align-items: flex-start; gap: 1rem; margin-bottom: 2.5rem; }
    .profile-pfp { width: 72px; height: 72px; }
    h1 { font-size: 1.6rem; }
    p.bio { font-size: 1rem; }
    .section-title { font-size: 1.1rem; margin: 2.25rem 0 1.25rem; }
    .filters { flex-wrap: wrap; gap: 0.5rem; }
    .filter-btn { font-size: 0.8rem; padding: 0.45rem 0.85rem; }
    .project-card, .experience-card { padding: 1.5rem; }
    .project-header, .experience-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .toast { bottom: 1rem; right: 1rem; left: 1rem; justify-content: space-between; gap: 1rem; padding: 0.9rem 1.1rem; }
    .contact-row { gap: 0.6rem; }
    .contact-pill { font-size: 0.85rem; padding: 0.55rem 1rem; }
    .site-footer { font-size: 0.8rem; padding: 1.75rem 1.25rem 2.5rem; }
}

@media (max-width: 380px) {
    h1 { font-size: 1.4rem; }
    .project-title, .experience-role { font-size: 1.05rem; }
}

.empty-note { color: var(--text-muted); font-size: 0.9rem; padding: 0.5rem 0; }