/* =========================================================
   Professional Profile Site – Shared Stylesheet
   ========================================================= */

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Bharathi Brand Kit v1 (inspired, but intentionally not identical) */
  --brand-navy:       #2b406f;
  --brand-ocean:      #3160b6;
  --brand-sky:        #1a97c8;
  --brand-leaf:       #86bf48;
  --brand-mint:       #1abd84;
  --brand-lime:       #b4d44f;
  --brand-gold:       #f2c21a;
  --brand-carbon:     #1d2027;

  --status-info-bg:   #eaf3fb;
  --status-success-bg:#e8f5ec;
  --status-warn-bg:   #fff6dd;
  --status-danger-bg: #fdecef;

  --color-bg:         #ffffff;
  --color-surface:    #ffffff;
  --color-border:     #d2dceb;
  --color-accent:     var(--brand-ocean);
  --color-accent-dim: var(--brand-sky);
  --color-text:       #1b2c48;
  --color-muted:      #4f5e79;
  --color-tag-bg:     #eef4f7;
  --color-heading:    #11243f;
  --color-btn-text:   #ffffff;
  --nav-overlay:      rgba(243, 247, 241, 0.48);
  --nav-banner-image: url("../images/header.jpg");
  --cover-banner-image: url("../images/banner_light.jpg");
  --footer-overlay:   rgba(243, 247, 241, 0.72);
  --footer-text:      #21324e;
  --footer-link:      #244f96;
  --cover-overlay:    rgba(255, 255, 255, 0.08);
  --nav-link-color:   #15355f;
  --nav-link-active:  #1f4d91;
  --nav-link-shadow:  0 1px 2px rgba(255, 255, 255, 0.5);
  --nav-link-bg-hover: rgba(255, 255, 255, 0.38);
  --nav-link-bg-active: rgba(255, 255, 255, 0.72);
  --nav-link-border-active: rgba(21, 53, 95, 0.18);
  --font-sans:        'Avenir Next', 'Century Gothic', 'Segoe UI', Arial, sans-serif;
  --font-mono:        'JetBrains Mono', 'Fira Code', monospace;
  --radius:           10px;
  --max-w:            860px;
  --nav-h:            64px;
}

[data-theme="dark"] {
  --brand-navy:       #6e8fcf;
  --brand-ocean:      #79a0e2;
  --brand-sky:        #44b8de;
  --brand-leaf:       #98cd62;
  --brand-mint:       #3acb98;
  --brand-lime:       #c4df66;
  --brand-gold:       #f8cc3a;
  --brand-carbon:     #e7edf8;

  --status-info-bg:   #1d2d44;
  --status-success-bg:#1e3a30;
  --status-warn-bg:   #3d3320;
  --status-danger-bg: #412a31;

  --color-bg:         #101827;
  --color-surface:    #1a2335;
  --color-border:     #2f3f5b;
  --color-accent:     var(--brand-ocean);
  --color-accent-dim: var(--brand-sky);
  --color-text:       #dce6f5;
  --color-muted:      #8f9fba;
  --color-tag-bg:     #1f3047;
  --color-heading:    #f2f6ff;
  --color-btn-text:   #ffffff;
  --nav-overlay:      rgba(9, 15, 25, 0.68);
  --nav-banner-image: url("../images/header.jpg");
  --cover-banner-image: url("../images/banner_dark.jpg");
  --footer-overlay:   rgba(9, 15, 25, 0.82);
  --footer-text:      #dce6f5;
  --footer-link:      #8eb0ff;
  --cover-overlay:    rgba(8, 14, 24, 0.16);
  --nav-link-color:   #e7edf8;
  --nav-link-active:  var(--color-accent);
  --nav-link-shadow:  0 1px 2px rgba(0, 0, 0, 0.45);
  --nav-link-bg-hover: transparent;
  --nav-link-bg-active: transparent;
  --nav-link-border-active: transparent;
}

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ── Navigation ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-image:
    linear-gradient(var(--nav-overlay), var(--nav-overlay)),
    var(--nav-banner-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.35);
}
.nav-brand span { color: var(--color-accent); }

[data-theme="dark"] .nav-brand {
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
}

.nav-links { display: flex; gap: 8px; align-items: center; }

.nav-links a {
  color: var(--nav-link-color);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 8px;
  position: relative;
  text-shadow: var(--nav-link-shadow);
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.nav-links a:hover {
  color: var(--nav-link-color);
  background: var(--nav-link-bg-hover);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--nav-link-active);
  background: var(--nav-link-bg-active);
  border: 1px solid var(--nav-link-border-active);
  text-decoration: none;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: -2px;
  height: 2px;
  border-radius: 999px;
  background: var(--brand-gold);
}

.theme-toggle-btn {
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  color: var(--color-text);
  font-size: 0.96rem;
  line-height: 1;
  border-radius: 8px;
  width: 34px;
  height: 34px;
  padding: 0;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.theme-toggle-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ── Page wrapper ── */
.page { max-width: var(--max-w); margin: 0 auto; padding: 0 24px 80px; }

.site-cover-wrap {
  padding: 18px 24px 0;
}

.site-cover {
  max-width: var(--max-w);
  margin: 0 auto;
  min-height: 220px;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background-image:
    linear-gradient(var(--cover-overlay), var(--cover-overlay)),
    var(--cover-banner-image);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  box-shadow: 0 16px 34px rgba(8, 15, 25, 0.08);
}

.site-cover-home {
  min-height: 180px;
  background-position: center 34%;
}

.site-cover-compact {
  min-height: 180px;
  background-position: center 34%;
}

/* ── Hero (index only) ── */
.hero {
  padding: 56px 0 64px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
  color: var(--color-heading);
}

.hero h1 span { color: var(--color-accent); }

.hero-sub {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 560px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }

.hero-banner {
  margin-top: 16px;
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--color-surface);
}

.hero-banner img {
  width: 100%;
  height: auto;
  display: block;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  transition: opacity 0.2s, transform 0.15s;
  cursor: pointer;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-btn-text);
}

.btn-outline {
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: transparent;
}
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ── Section heading ── */
.section { margin-top: 64px; }
.section-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--color-heading);
}

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 48px 0;
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card:hover { border-color: var(--color-accent-dim); transform: translateY(-2px); }

.card-icon { font-size: 1.6rem; }
.card h3 { font-size: 1.05rem; font-weight: 700; color: var(--color-heading); }
.card p { font-size: 0.9rem; color: var(--color-muted); flex: 1; }

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}

/* ── Tags ── */
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  background: var(--color-tag-bg);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
}

/* ── List items (writing / articles) ── */
.post-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.post-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}
.post-item:last-child { border-bottom: none; }

.post-title { font-size: 1rem; font-weight: 500; color: var(--color-text); }
.post-title:hover { color: var(--color-accent); }
.post-meta { font-size: 0.8rem; color: var(--color-muted); white-space: nowrap; font-family: var(--font-mono); }

/* ── Page header (inner pages) ── */
.page-header { padding: 56px 0 40px; }
.page-header h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.03em; color: var(--color-heading); }
.page-header p { color: var(--color-muted); margin-top: 8px; max-width: 520px; }

/* ── Skill pills (profile) ── */
.skill-group { margin-bottom: 20px; }
.skill-group-label { font-size: 0.8rem; font-family: var(--font-mono); color: var(--color-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.06em; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.85rem;
  padding: 5px 14px;
  border-radius: 6px;
}

/* ── Social links ── */
.social-links { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-muted);
  font-size: 0.88rem;
  transition: color 0.2s;
}
.social-link:hover { color: var(--color-accent); text-decoration: none; }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--color-border);
  margin-top: 80px;
  padding: 32px 0;
  background-image:
    linear-gradient(var(--footer-overlay), var(--footer-overlay)),
    var(--nav-banner-image);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-inner p { font-size: 0.82rem; color: var(--footer-text); }
.footer-inner a { color: var(--footer-link) !important; }

/* ── Brand kit (reusable for future pages) ── */
.brand-kit {
  margin-top: 22px;
  border: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--status-info-bg), var(--color-surface));
  border-radius: 14px;
  padding: 20px;
}

.brand-kit h3 {
  font-size: 1rem;
  color: var(--color-heading);
  margin-bottom: 6px;
}

.brand-kit p {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.brand-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.brand-swatch {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--color-surface);
}

.brand-swatch-color {
  height: 36px;
}

.brand-swatch-meta {
  padding: 8px 10px;
}

.brand-swatch-name {
  display: block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text);
}

.brand-swatch-hex {
  display: block;
  font-size: 0.72rem;
  color: var(--color-muted);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .nav-links a { padding: 6px 8px; font-size: 0.85rem; }
  .theme-toggle-btn { width: 30px; height: 30px; font-size: 0.9rem; }
  .site-cover-wrap { padding: 12px 16px 0; }
  .site-cover-home { min-height: 128px; background-position: 62% center; }
  .site-cover-compact { min-height: 128px; background-position: 62% center; }
  .hero { padding: 48px 0 40px; }
  .hero-banner { border-radius: 10px; }
  .card-grid { grid-template-columns: 1fr; }
  .post-item { flex-direction: column; gap: 4px; }
  .footer-inner { justify-content: center; text-align: center; }
}