/* =========================================================
   Karthik Sukumaran — executive profile
   Calm, editorial, outcome-first. Same palette as the blog.
   ========================================================= */

:root {
	--bg: #ffffff;
	--bg-soft: #f8f8f7;
	--surface: #ffffff;
	--text: #0a0a0a;
	--text-2: #57534e;
	--text-3: #8a8580;
	--line: #e7e5e4;
	--accent: #1d4ed8;
	--accent-soft: rgba(29, 78, 216, 0.08);
	--btn-bg: #0a0a0a;
	--btn-text: #ffffff;
	--cta-bg: #0a0a0a;
	--cta-text: #fafaf9;
	--cta-muted: #a8a29e;
	--logo-filter: grayscale(1) contrast(1.05);
	--shadow: 0 1px 2px rgba(0,0,0,.04), 0 20px 40px -24px rgba(0,0,0,.25);
	--font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	--serif: Newsreader, "Iowan Old Style", Georgia, serif;
	color-scheme: light;
}
@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) {
		--bg: #0b0c0e; --bg-soft: #111215; --surface: #15161a;
		--text: #f5f5f4; --text-2: #a8a29e; --text-3: #78716c; --line: #26272c;
		--accent: #93c5fd; --accent-soft: rgba(147, 197, 253, 0.1);
		--btn-bg: #f5f5f4; --btn-text: #0b0c0e;
		--cta-bg: #f5f5f4; --cta-text: #0b0c0e; --cta-muted: #57534e;
		--logo-filter: grayscale(1) invert(1) brightness(1.4) contrast(.9);
		--shadow: 0 1px 2px rgba(0,0,0,.5);
		color-scheme: dark;
	}
}
:root[data-theme="dark"] {
	--bg: #0b0c0e; --bg-soft: #111215; --surface: #15161a;
	--text: #f5f5f4; --text-2: #a8a29e; --text-3: #78716c; --line: #26272c;
	--accent: #93c5fd; --accent-soft: rgba(147, 197, 253, 0.1);
	--btn-bg: #f5f5f4; --btn-text: #0b0c0e;
	--cta-bg: #f5f5f4; --cta-text: #0b0c0e; --cta-muted: #57534e;
	--logo-filter: grayscale(1) invert(1) brightness(1.4) contrast(.9);
	--shadow: 0 1px 2px rgba(0,0,0,.5);
	color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; color: var(--text); }
p { margin: 0 0 1em; }
ul, ol, dl, dd { margin: 0; padding: 0; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.wrap { width: 100%; max-width: none; margin: 0 auto; padding: 0 clamp(20px, 5vw, 128px); }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--text); color: var(--bg); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 8px; }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .02em; color: var(--text-2); margin-bottom: 14px; }
.text-link { color: var(--accent); font-weight: 600; font-size: 15px; }
.text-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; height: 46px; padding: 0 22px; border-radius: 999px; font: 600 15px/1 var(--font); white-space: nowrap; transition: transform .15s, opacity .15s, background .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--btn-bg); color: var(--btn-text); }
.btn-primary:hover { opacity: .9; }
.btn-outline { box-shadow: inset 0 0 0 1px var(--line); color: var(--text); }
.btn-outline:hover { box-shadow: inset 0 0 0 1px var(--text-3); background: var(--bg-soft); }

/* ---------- Nav ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner { height: 64px; display: flex; align-items: center; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15px; letter-spacing: -0.01em; }
.brand img { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; object-position: center 20%; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.nav-links a { padding: 8px 12px; border-radius: 999px; font-size: 14px; font-weight: 500; color: var(--text-2); transition: color .15s, background .15s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links .nav-cta { margin-left: 8px; padding: 9px 16px; background: var(--btn-bg); color: var(--btn-text); font-weight: 600; }
.nav-links .nav-cta:hover, .nav-links .nav-cta.active { color: var(--btn-text); opacity: .9; }
.nav-actions { display: flex; gap: 4px; }
.icon-btn { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; border: 0; background: transparent; color: var(--text-2); cursor: pointer; }
.icon-btn:hover { background: var(--bg-soft); color: var(--text); }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .i-sun { display: none; } :root:not([data-theme="light"]) .i-moon { display: block; } }
.menu-btn { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 48px; }
.hero-grid { display: grid; grid-template-columns: 1.35fr .9fr; gap: clamp(40px, 6vw, 120px); align-items: center; }
.hero h1 { font-size: clamp(40px, 5vw, 80px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.04; margin-bottom: 26px; }
.hero h1 em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -0.02em; }
.lead { font-size: clamp(18px, 1.3vw, 21px); line-height: 1.6; color: var(--text-2); max-width: 660px; margin-bottom: 32px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.portrait { position: relative; margin: 0; justify-self: end; width: 100%; max-width: clamp(320px, 30vw, 520px); }
.portrait > img { width: 100%; height: auto; aspect-ratio: 4 / 4.8; object-fit: cover; object-position: center 22%; border-radius: 28px; box-shadow: var(--shadow); }
.portrait figcaption { position: absolute; left: -28px; bottom: 28px; display: flex; align-items: center; gap: 10px; padding: 12px 16px 12px 12px; border-radius: 16px; background: var(--surface); box-shadow: 0 0 0 1px var(--line), 0 16px 32px -16px rgba(0,0,0,.25); font-size: 13px; line-height: 1.3; max-width: 260px; }
.portrait figcaption img { width: 28px; height: 28px; border-radius: 6px; object-fit: contain; background: #fff; flex-shrink: 0; }
.portrait figcaption span { display: flex; flex-direction: column; color: var(--text-2); }
.portrait figcaption strong { color: var(--text); font-weight: 600; }

.logos { display: flex; align-items: center; flex-wrap: wrap; gap: 20px 44px; margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--line); }
.logos-label { font-size: 13px; font-weight: 500; color: var(--text-3); }
.logos img { filter: var(--logo-filter); opacity: .75; transition: opacity .2s, filter .2s; }
.logos img:hover { opacity: 1; filter: none; }
.logo-citi { height: 26px; width: auto; }
.logo-hcl { height: 18px; width: auto; }
.logo-polaris { height: 34px; width: auto; mix-blend-mode: multiply; }
:root[data-theme="dark"] .logo-polaris { mix-blend-mode: screen; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .logo-polaris { mix-blend-mode: screen; } }
.logo-text { font-weight: 800; font-size: 20px; letter-spacing: .06em; color: var(--text-3); }

/* ---------- Impact ---------- */
.impact { padding: 8px 0 24px; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metrics > div { padding: 32px 28px 30px 0; }
.metrics > div + div { padding-left: 28px; border-left: 1px solid var(--line); }
.metrics dt { font-size: clamp(24px, 2.3vw, 30px); font-weight: 700; letter-spacing: -0.035em; line-height: 1.1; margin-bottom: 10px; }
.metrics dd { font-size: 14px; color: var(--text-2); line-height: 1.5; }

/* ---------- Sections ---------- */
.section { padding: 104px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 820px; margin-bottom: 52px; }
.section-head h2 { font-size: clamp(30px, 3.4vw, 42px); letter-spacing: -0.035em; line-height: 1.1; }
.section-sub { margin: 16px 0 0; font-size: 17px; color: var(--text-2); }
.section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; max-width: none; }

/* How I help */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(32px, 4vw, 72px); }
.pillar { border-top: 2px solid var(--text); padding-top: 22px; }
.pillar-num { font-size: 13px; font-weight: 600; color: var(--text-3); }
.pillar h3 { font-size: 21px; margin: 10px 0 12px; }
.pillar p { margin: 0; color: var(--text-2); font-size: 15.5px; }

/* Case studies */
.case { display: grid; grid-template-columns: .85fr 1.6fr; gap: 56px; padding: 40px; border-radius: 24px; background: var(--surface); box-shadow: 0 0 0 1px var(--line); margin-bottom: 20px; }
.case-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 4px 10px; border-radius: 999px; margin-bottom: 16px; }
.case h3 { font-size: 26px; letter-spacing: -0.03em; margin-bottom: 8px; }
.case-role { font-size: 14px; color: var(--text-3); margin-bottom: 28px; }
.case-result { margin: 0; padding-top: 18px; border-top: 1px solid var(--line); font-size: 15px; color: var(--text-2); }
.case-result strong { display: block; font-size: 22px; letter-spacing: -0.03em; color: var(--text); margin-bottom: 2px; }
.case-body { display: grid; gap: 22px; }
.case-body h4 { font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--text-3); margin-bottom: 6px; }
.case-body p { margin: 0; font-size: 15.5px; color: var(--text); }
.case-lead { background: var(--surface); box-shadow: 0 0 0 1px var(--line), var(--shadow); }
.case-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.case-small { display: block; padding: 32px; margin: 0; }
.case-small h3 { font-size: 21px; margin-bottom: 10px; }
.case-small p { color: var(--text-2); font-size: 15px; }
.case-small .case-result { margin-top: 18px; }
.case-small .case-result strong { font-size: 20px; margin: 0; }

/* Approach */
.approach-grid { display: grid; grid-template-columns: .9fr 1.2fr; gap: 72px; align-items: start; }
.approach-grid .section-head { margin-bottom: 0; position: sticky; top: 112px; }
.principles { list-style: none; counter-reset: p; display: grid; gap: 0; }
.principles li { counter-increment: p; display: grid; grid-template-columns: 56px 1fr; gap: 4px 0; padding: 26px 0; border-top: 1px solid var(--line); }
.principles li:last-child { border-bottom: 1px solid var(--line); }
.principles li::before { content: counter(p, decimal-leading-zero); grid-row: span 2; font-size: 13px; font-weight: 600; color: var(--text-3); padding-top: 4px; }
.principles h3 { font-size: 20px; margin-bottom: 6px; }
.principles p { margin: 0; color: var(--text-2); }

/* Experience */
.roles { list-style: none; }
.role { display: grid; grid-template-columns: 200px 1fr; gap: 40px; padding: 30px 0; border-top: 1px solid var(--line); }
.role:last-child { border-bottom: 1px solid var(--line); }
.role-when { font-size: 14px; font-weight: 500; color: var(--text-3); padding-top: 10px; }
.role-title { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.role-title img { width: 40px; height: 40px; object-fit: contain; border-radius: 8px; background: #fff; padding: 4px; box-shadow: 0 0 0 1px var(--line); flex-shrink: 0; }
.role-title h3 { font-size: 19px; letter-spacing: -0.02em; }
.role-title p { margin: 2px 0 0; font-size: 14px; color: var(--text-2); }
.role-what > p { margin: 0; max-width: 720px; color: var(--text-2); }

/* Expertise */
.expertise { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.expertise h3 { font-size: 16px; padding-bottom: 12px; margin-bottom: 12px; border-bottom: 1px solid var(--line); }
.expertise p { margin: 0; font-size: 14.5px; line-height: 1.8; color: var(--text-2); }

/* Credentials */
.creds { display: grid; grid-template-columns: 1.1fr 1.1fr 1fr; gap: 48px; }
.creds h3 { font-size: 16px; padding-bottom: 12px; margin-bottom: 8px; border-bottom: 1px solid var(--line); }
.cred-list { list-style: none; }
.cred-list li { display: flex; gap: 14px; align-items: flex-start; padding: 12px 0; }
.cred-list img { width: 36px; height: 36px; object-fit: contain; border-radius: 8px; background: #fff; padding: 3px; box-shadow: 0 0 0 1px var(--line); flex-shrink: 0; }
.cred-list span:last-child { display: flex; flex-direction: column; font-size: 14px; color: var(--text-2); line-height: 1.45; }
.cred-list strong { color: var(--text); font-weight: 600; font-size: 15px; }
.award { flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--text); box-shadow: inset 0 0 0 1px var(--line); background: var(--surface); }
.cert-list { list-style: none; }
.cert-list li { padding: 9px 0; font-size: 14.5px; color: var(--text); border-bottom: 1px solid var(--line); }
.cert-list li:last-child { border-bottom: 0; }

/* Writing */
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.post { display: flex; flex-direction: column; padding: 28px; border-radius: 20px; box-shadow: 0 0 0 1px var(--line); transition: box-shadow .2s, transform .2s; }
.post:hover { box-shadow: 0 0 0 1px var(--text-3); transform: translateY(-2px); }
.post-cat { font-size: 12px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--text-3); margin-bottom: 10px; }
.post h3 { font-size: 20px; margin-bottom: 10px; }
.post p { flex: 1; font-size: 15px; color: var(--text-2); }

/* Contact */
.contact { padding: 24px 0 96px; }
.contact-card { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; padding: 56px; border-radius: 28px; background: var(--cta-bg); color: var(--cta-text); }
.contact-card h2 { color: var(--cta-text); font-size: clamp(28px, 3vw, 38px); letter-spacing: -0.035em; margin-bottom: 14px; }
.contact-card p { color: var(--cta-muted); font-size: 17px; margin: 0; }
.contact-actions { display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.btn-invert { background: var(--cta-text); color: var(--cta-bg); }
.btn-ghost-invert { color: var(--cta-text); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--cta-text) 30%, transparent); }
.btn-ghost-invert:hover { box-shadow: inset 0 0 0 1px var(--cta-text); }

/* Footer */
.footer { border-top: 1px solid var(--line); color: var(--text-3); font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; padding-top: 28px; padding-bottom: 40px; }
.footer-links { display: flex; gap: 22px; }
.footer a:hover { color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
	.hero-grid { gap: 40px; }
	.metrics { grid-template-columns: repeat(2, 1fr); }
	.metrics > div:nth-child(3) { padding-left: 0; border-left: 0; }
	.metrics > div:nth-child(n+3) { border-top: 1px solid var(--line); }
	.pillars { gap: 32px; }
	.case { grid-template-columns: 1fr; gap: 28px; }
	.approach-grid { grid-template-columns: 1fr; gap: 32px; }
	.approach-grid .section-head { position: static; }
	.expertise { grid-template-columns: 1fr 1fr; }
	.creds { grid-template-columns: 1fr 1fr; }
	.contact-card { grid-template-columns: 1fr; }
	.contact-actions { align-items: flex-start; flex-direction: row; flex-wrap: wrap; }
}
@media (max-width: 860px) {
	.menu-btn { display: grid; }
	.nav-links { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 16px; background: var(--bg); border-bottom: 1px solid var(--line); opacity: 0; visibility: hidden; transform: translateY(-6px); pointer-events: none; transition: opacity .2s, transform .2s, visibility 0s .2s; }
	.nav-links.open { opacity: 1; visibility: visible; transform: none; pointer-events: auto; transition: opacity .2s, transform .2s; }
	.nav-links a { padding: 12px 8px; border-radius: 8px; }
	.nav-links .nav-cta { margin: 8px 0 0; text-align: center; }
	.nav-actions { margin-left: auto; }
	.hero { padding-top: 40px; }
	.hero-grid { grid-template-columns: 1fr; }
	.portrait { justify-self: start; max-width: 340px; order: -1; }
	.portrait figcaption { left: auto; right: -16px; bottom: 20px; }
	.pillars, .posts { grid-template-columns: 1fr; }
	.case-pair { grid-template-columns: 1fr; }
	.role { grid-template-columns: 1fr; gap: 6px; }
	.role-when { padding-top: 0; }
	.section { padding: 72px 0; }
}
@media (max-width: 560px) {
	.brand span { font-size: 14px; }
	.hero h1 { font-size: 38px; }
	.lead { font-size: 17px; }
	.btn { height: 44px; padding: 0 18px; font-size: 14px; }
	.logos { gap: 18px 28px; margin-top: 44px; }
	.metrics { grid-template-columns: 1fr; }
	.metrics > div, .metrics > div + div { padding: 22px 0; border-left: 0; }
	.metrics > div + div { border-top: 1px solid var(--line); }
	.case { padding: 26px 22px; border-radius: 18px; }
	.case-small { padding: 24px 22px; }
	.expertise, .creds { grid-template-columns: 1fr; gap: 32px; }
	.contact-card { padding: 32px 24px; border-radius: 22px; }
	.contact .btn { white-space: normal; height: auto; min-height: 44px; padding: 10px 18px; }
	.footer-inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	* { transition: none !important; }
}