*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font: inherit;
    border: none;
    background: none;
    cursor: pointer;
    color: inherit;
}

/*theme*/
:root {
    /* light mode */
    --bg: #ffffff;
    --bg-soft: #fafafa;
    --text: #111418;
    --text-dim: #5a6270;
    --text-faint: #8a92a0;
    --accent: #dc2626;      
    --accent-soft: #fee2e2;  
    --rule: #e6e8ec;
    --code-bg: #f3f4f6;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    --avatar-ring: rgba(220, 38, 38, 0.18);
    --glow-1: rgba(220, 38, 38, 0.18);
    --glow-2: rgba(220, 38, 38, 0);
    --grain: 0;

    
    --max: 640px;
    --radius: 14px;
    --transition: 320ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg: #0a0e1a;
    --bg-soft: #0e1322;
    --text: #e6e8ee;
    --text-dim: #a5acba;
    --text-faint: #6c7488;
    --accent: #ef4444;      
    --accent-soft: #2a0e10;
    --rule: #1c2233;
    --code-bg: #11172a;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    --avatar-ring: rgba(239, 68, 68, 0.25);
    --glow-1: rgba(239, 68, 68, 0.22);
    --glow-2: rgba(239, 68, 68, 0);
}

/* back+body */
body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
}

.bg-glow {
    position: fixed;
    top: -160px;
    left: -160px;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle at center, var(--glow-1) 0%, var(--glow-2) 70%);
    pointer-events: none;
    z-index: 0;
    transition: background var(--transition);
}

/* second tiny glow */
[data-theme="dark"] .bg-glow::after {
    content: "";
    position: absolute;
    top: 60%;
    left: 70%;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle at center, rgba(239, 68, 68, 0.10) 0%, transparent 70%);
    transform: translate(-50%, -50%);
}

/*theme toggle*/
.theme-btn {
    position: fixed;
    top: 20px;
    right: 22px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: var(--text-dim);
    border: 1px solid var(--rule);
    background: var(--bg);
    box-shadow: var(--shadow);
    z-index: 10;
    transition: color var(--transition), border-color var(--transition),
                background var(--transition), transform var(--transition);
}

.theme-btn:hover {
    color: var(--accent);
    transform: rotate(15deg);
}

.theme-btn .ico {
    grid-column: 1;
    grid-row: 1;
    transition: opacity var(--transition), transform var(--transition);
}

[data-theme="light"] .ico-sun { opacity: 0; transform: scale(0.6) rotate(-45deg); }
[data-theme="light"] .ico-moon { opacity: 1; transform: scale(1); }
[data-theme="dark"]  .ico-sun { opacity: 1; transform: scale(1); }
[data-theme="dark"]  .ico-moon { opacity: 0; transform: scale(0.6) rotate(45deg); }

.wrap {
    position: relative;
    z-index: 1;
    max-width: var(--max);
    margin: 0 auto;
    padding: 110px 24px 80px;
}

/* ---------- avatar / pfp ---------- */
.avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 28px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-soft);
    box-shadow: 0 0 0 1px var(--rule), 0 0 0 4px var(--avatar-ring);
    transition: box-shadow var(--transition);
}

.avatar img {
    width: 100%;
    height: 100%;

    object-fit: cover;
    object-position: center top;
    transition: filter var(--transition), opacity var(--transition),
                transform var(--transition);
}

[data-theme="dark"] .avatar {
    box-shadow:
        0 0 0 1px var(--rule),
        0 0 0 4px var(--avatar-ring),
        0 0 22px rgba(239, 68, 68, 0.35);
}

.avatar:hover img {
    transform: scale(1.04);
}

[data-theme="dark"] .avatar img {
 transform: scale(1.04);
}

/* ligh mode */
[data-theme="light"] .avatar:hover img {
    transform: scale(1.05);
}

/* heading*/
.name {
    font-family: "Playfair Display", "Times New Roman", serif;
    font-style: italic;
    font-weight: 500;
    font-size: clamp(40px, 6vw, 56px);
    line-height: 1.1;
    text-align: center;
    margin: 0 0 6px;
    letter-spacing: -0.01em;
    transition: color var(--transition);
}

.name:hover {
    color: var(--accent);
    cursor: default;
}

.sub {
    text-align: center;
    color: var(--text-dim);
    font-size: 15px;
    margin: 0 0 36px;
    letter-spacing: 0.01em;
}

/*about */
.about p {
    margin: 0 0 18px;
    color: var(--text);
    font-size: 16px;
    line-height: 1.7;
}

.about a {
    color: var(--accent);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.about a:hover {
    border-bottom-color: var(--accent);
}

/* link row*/
.links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 28px;
    margin: 40px 0 28px;
}

.link {
    position: relative;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    padding: 4px 2px;
    transition: color var(--transition), transform var(--transition);
}

/* hover line */
.link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

.link:hover {
    color: var(--accent);
    transform: translateY(-1px);
}

.link:hover::after {
    transform: scaleX(1);
}

/* clock and loc */
.loc {
    text-align: center;
    color: var(--text-dim);
    font-size: 13.5px;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.loc .dot {
    color: var(--text-faint);
}

.loc .pin {
    display: inline-block;
    width: 9px;
    height: 9px;
    background: var(--accent);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    margin-right: 2px;
    box-shadow: 0 0 8px rgba(220, 38, 38, 0.5);
}

/* blog */
.subhead {
    margin: 0 0 6px;
    color: var(--text-dim);
    font-size: 14px;
}

.subhead a {
    color: var(--accent);
}

.subhead a:hover {
    text-decoration: underline;
}

.page-title {
    font-family: "Playfair Display", serif;
    font-style: italic;
    font-weight: 500;
    font-size: clamp(40px, 6vw, 56px);
    margin: 18px 0 10px;
    letter-spacing: -0.01em;
}

.page-sub {
    color: var(--text-dim);
    margin: 0 0 36px;
}

/* blog list */
.post-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.post-list li {
    border-top: 1px solid var(--rule);
    padding: 22px 0;
    transition: background var(--transition);
}

.post-list li:last-child {
    border-bottom: 1px solid var(--rule);
}

.post-list a {
    display: block;
    color: var(--text);
    transition: color var(--transition), transform var(--transition);
}

.post-list a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.post-date {
    color: var(--text-faint);
    font-size: 12.5px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.post-title {
    font-family: "Playfair Display", serif;
    font-style: italic;
    font-size: 22px;
    line-height: 1.3;
    margin: 0;
}

/* single post page */
.post-header {
    margin-bottom: 36px;
}

.post-meta {
    color: var(--text-faint);
    font-size: 14px;
    margin-top: 6px;
}

.post-body p {
    margin: 0 0 20px;
    line-height: 1.75;
    font-size: 16.5px;
}

.post-body a {
    color: var(--accent);
    border-bottom: 1px solid var(--accent-soft);
    transition: border-color var(--transition);
}

.post-body a:hover {
    border-bottom-color: var(--accent);
}

/*skill/cve card */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin: 0 0 36px;
}

.skill-card {
    padding: 14px 16px;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: var(--bg-soft);
    color: var(--text);
    font-size: 14.5px;
    font-weight: 500;
    text-align: center;
    transition: transform var(--transition), border-color var(--transition),
                color var(--transition), background var(--transition);
}

.skill-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    color: var(--accent);
}

.cve-item {
    padding: 20px 0;
    border-top: 1px solid var(--rule);
}

.cve-item:last-child {
    border-bottom: 1px solid var(--rule);
}

.cve-id {
    font-family: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 0.02em;
}

.cve-title {
    font-family: "Playfair Display", serif;
    font-style: italic;
    font-size: 21px;
    margin: 4px 0 6px;
    color: var(--text);
}

.cve-desc {
    color: var(--text-dim);
    font-size: 14.5px;
    margin: 0;
}

/* link embeed slot */
.embed-slot {
    margin-top: 18px;
    padding: 18px;
    border: 1px dashed var(--rule);
    border-radius: var(--radius);
    color: var(--text-faint);
    font-size: 14px;
    text-align: center;
    background: var(--bg-soft);
}

.embed-slot code {
    color: var(--accent);
    background: var(--code-bg);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 13px;
}

/*black line */
.back {
    color: var(--text-dim);
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 24px;
    transition: color var(--transition), transform var(--transition);
}

.back:hover {
    color: var(--accent);
    transform: translateX(-3px);
}

/* colour*/
::selection {
    background: var(--accent);
    color: #fff;
}

/* made by me footer */
.foot {
    text-align: center;
    color: var(--text-faint);
    font-size: 12.5px;
    margin-top: 60px;
    letter-spacing: 0.04em;
}

/*response */
@media (max-width: 540px) {
    .wrap { padding: 90px 20px 60px; }
    .links { gap: 18px; }
    .name { font-size: 38px; }
}