/* ==========================================================================
   LekshmySankar.com — design tokens + base
   Soft & Modern light palette. Sage mist + forest ink + refined gold.
   Editorial, dignified. Aesop / Kinfolk / MoMA publication energy.
   ========================================================================== */

:root {
  /* Color — soft sage mist background, deep forest ink, refined gold accent */
  --bg-0: #f2f4ef;              /* base background — very light sage mist */
  --bg-1: #ecefe8;              /* slightly deeper sage — mobile nav, off-panels */
  --bg-2: #e6eadf;              /* ambient tint */
  --surface: #faf9f4;           /* near-white sage cream for cards */
  --surface-2: #f6f5ee;         /* alternate card surface */

  /* Lines — very soft warm gray */
  --line: oklch(85% 0.012 90 / 0.55);
  --line-strong: oklch(78% 0.018 90 / 0.75);

  /* Ink — deep forest green primary, sage-olive muted */
  --ink-0: #1c2a22;             /* deep forest — headings / primary */
  --ink-1: #2b3a30;             /* body copy */
  --ink-2: #5c6a5e;             /* muted sage-olive — captions, meta */
  --ink-3: #8a9188;             /* very muted — timestamps, quiet labels */

  /* Refined gold accent — brass on parchment, not neon */
  --accent: oklch(64% 0.11 78);        /* warm muted gold — links, CTAs */
  --accent-strong: oklch(56% 0.12 70); /* deeper brass — hover, emphasis */
  --accent-dim: oklch(78% 0.07 85);    /* soft gold — dim states */
  --accent-soft: oklch(64% 0.11 78 / 0.14);
  --gold: oklch(64% 0.11 78);

  /* Type */
  --font-display: 'Fraunces', 'Newsreader', Georgia, serif;
  --font-body: 'General Sans', 'Satoshi', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;

  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.85rem + 0.15vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.3vw, 1.25rem);
  --text-xl: clamp(1.375rem, 1.2rem + 0.7vw, 1.75rem);
  --text-2xl: clamp(2rem, 1.5rem + 1.8vw, 3rem);
  --text-hero: clamp(2.5rem, 1.8rem + 4vw, 5.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --container: 1200px;
  --container-narrow: 780px;

  --radius: 4px;
  --radius-lg: 14px;

  /* Warm soft shadow — for cards, quiz, clock */
  --shadow-sm: 0 1px 2px oklch(30% 0.02 90 / 0.05);
  --shadow-md: 0 6px 20px oklch(30% 0.02 90 / 0.06), 0 2px 6px oklch(30% 0.02 90 / 0.04);
  --shadow-lg: 0 22px 55px oklch(30% 0.02 90 / 0.10), 0 4px 12px oklch(30% 0.02 90 / 0.05);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-0);
  color: var(--ink-1);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Ambient warm gradient — extremely subtle sage mist */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 700px at 82% -8%, oklch(90% 0.04 85 / 0.55), transparent 60%),
    radial-gradient(900px 600px at -8% 108%, oklch(88% 0.03 150 / 0.45), transparent 60%),
    linear-gradient(180deg, #f2f4ef 0%, #eef1ea 100%);
  pointer-events: none;
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(oklch(45% 0.03 145 / 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  pointer-events: none;
  mask-image: radial-gradient(circle at 70% 20%, black 5%, transparent 55%);
  -webkit-mask-image: radial-gradient(circle at 70% 20%, black 5%, transparent 55%);
}

img, svg, video { max-width: 100%; display: block; height: auto; }

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

button, input, textarea { font: inherit; color: inherit; }

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

/* Type */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--ink-0);
  letter-spacing: -0.02em;
  line-height: 1.08;
}
h1 { font-size: var(--text-hero); font-weight: 300; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); line-height: 1.2; }
h4 { font-size: var(--text-lg); font-family: var(--font-body); font-weight: 600; letter-spacing: 0; }

p { color: var(--ink-1); }
p + p { margin-top: 1em; }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-strong);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent-strong);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

section {
  padding-block: clamp(4rem, 8vw, 8rem);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.9em 1.6em;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-0);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 20%, oklch(64% 0.11 78 / 0.12) 50%, transparent 80%);
  transform: translateX(-100%);
  transition: transform 0.6s var(--ease-out);
}
.btn:hover { border-color: var(--accent); color: var(--accent-strong); }
.btn:hover::after { transform: translateX(100%); }

.btn-primary {
  background: linear-gradient(135deg, oklch(64% 0.11 78), oklch(56% 0.12 70));
  border-color: transparent;
  color: #fbf9f2;
  font-weight: 600;
}
.btn-primary:hover { color: #fbf9f2; filter: brightness(1.05); }

.btn-arrow::after {
  display: none;
}
.btn-arrow {
  padding: 0;
  border: none;
  color: var(--accent-strong);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  display: inline-flex;
  gap: 0.5em;
  align-items: center;
}
.btn-arrow::before {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--accent-strong);
  transform: scaleX(0.3);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.btn-arrow:hover::before { transform: scaleX(1); }
.btn-arrow span.arrow { transition: transform 0.3s var(--ease-out); }
.btn-arrow:hover span.arrow { transform: translateX(4px); }

/* Reveal on scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal][data-delay="1"] { transition-delay: 0.08s; }
[data-reveal][data-delay="2"] { transition-delay: 0.16s; }
[data-reveal][data-delay="3"] { transition-delay: 0.24s; }
[data-reveal][data-delay="4"] { transition-delay: 0.32s; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(96% 0.008 130 / 0.72);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}
.header.is-scrolled {
  border-bottom-color: var(--line);
  background: oklch(96% 0.008 130 / 0.9);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.05rem clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--ink-0);
}
.brand-mark {
  width: 32px; height: 32px;
  color: var(--accent-strong);
}
.brand strong { font-weight: 500; }
.brand em { font-style: normal; color: var(--ink-2); font-family: var(--font-body); font-size: 0.72em; letter-spacing: 0.18em; text-transform: uppercase; padding-left: 0.4em; border-left: 1px solid var(--line-strong); margin-left: 0.4em; }

.nav {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}
.nav a {
  font-size: var(--text-sm);
  color: var(--ink-2);
  letter-spacing: 0.02em;
  position: relative;
  padding-block: 4px;
}
.nav a:hover { color: var(--ink-0); }
.nav a.is-active { color: var(--accent-strong); }
.nav a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: var(--accent-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-out);
}
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  color: var(--ink-1);
  cursor: pointer;
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(80vw, 320px);
    background: var(--bg-1);
    border-left: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
    z-index: 60;
  }
  .nav.is-open { transform: translateX(0); }
  .nav a { font-size: 1.1rem; }
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  padding-block: 3rem;
  margin-top: 4rem;
  color: var(--ink-3);
  font-size: var(--text-sm);
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-links {
  display: flex;
  gap: 1.75rem;
}
.footer-links a:hover { color: var(--accent-strong); }

/* Utility */
.text-accent { color: var(--accent-strong); }
.text-mono { font-family: var(--font-mono); }
.grid { display: grid; gap: var(--space-8); }
.stack-sm { display: flex; flex-direction: column; gap: var(--space-3); }
.stack-md { display: flex; flex-direction: column; gap: var(--space-6); }
.stack-lg { display: flex; flex-direction: column; gap: var(--space-8); }
.hstack { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
  margin-block: var(--space-16);
}

/* Cards */
.card {
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.4s var(--ease-out), transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 0%), oklch(64% 0.11 78 / 0.10), transparent 40%);
  opacity: 0;
  transition: opacity 0.5s var(--ease-out);
  pointer-events: none;
}
.card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-md); }
.card:hover::before { opacity: 1; }