/* Niddhi Softwares — base stylesheet
   Original CSS design system. No third-party UI frameworks. */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7fb;
  --color-bg-dark: #0b2545;
  --color-text: #16233a;
  --color-text-muted: #4d5b70;
  --color-text-on-dark: #eef3fa;
  --color-text-on-dark-muted: #b7c4d9;
  --color-primary: #0b3d91;
  --color-primary-dark: #082b66;
  --color-primary-light: #1b5aa8;
  --color-accent: #c8500f;
  --color-accent-dark: #a13f0a;
  --color-border: #dbe3ee;
  --color-focus: #2f80ed;
  --radius: 10px;
  --max-width: 1160px;
  --font-body: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow-card: 0 1px 3px rgba(11, 37, 69, 0.08), 0 1px 2px rgba(11, 37, 69, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

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

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-primary-dark);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  color: var(--color-bg-dark);
  font-weight: 700;
}

h1 { font-size: clamp(1.9rem, 1.5rem + 1.6vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 1.3rem + 0.8vw, 2rem); }
h3 { font-size: 1.25rem; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  z-index: 1000;
  transition: top 0.15s ease;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--color-bg-dark);
}

.brand:hover {
  color: var(--color-primary);
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand-name {
  font-weight: 800;
  font-size: 1.15rem;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  cursor: pointer;
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  display: block;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.6rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.96rem;
  padding: 0.4rem 0.1rem;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover {
  color: var(--color-primary);
}

.main-nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    width: 100%;
    order: 3;
  }

  .main-nav.is-open {
    display: block;
  }

  .site-header .container {
    flex-wrap: wrap;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0 1rem;
    border-top: 1px solid var(--color-border);
    margin-top: 0.75rem;
  }

  .main-nav a {
    display: block;
    padding: 0.75rem 0.25rem;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
  font-size: 0.98rem;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

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

.btn-accent:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-on-dark);
  padding: 4rem 0;
}

.hero h1 {
  color: #fff;
  max-width: 34rem;
}

.hero p.lead {
  color: var(--color-text-on-dark-muted);
  font-size: 1.15rem;
  max-width: 36rem;
  margin: 1rem 0 2rem;
}

.page-header {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 3rem 0;
}

.page-header p.lead {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 42rem;
}

/* ---------- Sections ---------- */

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-heading {
  max-width: 42rem;
  margin: 0 0 2rem;
}

.section-heading p {
  color: var(--color-text-muted);
}

/* ---------- Cards / grid ---------- */

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
}

.card h3 {
  margin-top: 0.75rem;
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.card-icon {
  width: 44px;
  height: 44px;
  color: var(--color-primary);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.list-plain {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-plain li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.list-plain li:last-child {
  border-bottom: none;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.tag {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.callout {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.callout p:last-child {
  margin-bottom: 0;
}

/* ---------- Legal / content pages ---------- */

.prose {
  max-width: 48rem;
}

.prose h2 {
  margin-top: 2.5rem;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose ul, .prose ol {
  color: var(--color-text);
  padding-left: 1.4rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.draft-banner {
  background: #fff4e5;
  border: 1px solid #f2c94c;
  color: #6b4c00;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.meta-line {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* ---------- Contact ---------- */

.contact-box {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  max-width: 34rem;
}

.contact-box a.contact-email {
  font-size: 1.15rem;
  font-weight: 700;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark-muted);
  padding: 3rem 0 2rem;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 2fr 1fr 1fr;
}

@media (max-width: 700px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.site-footer h2 {
  color: #fff;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.site-footer a {
  color: var(--color-text-on-dark-muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav li {
  margin-bottom: 0.6rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
}

/* ---------- 404 ---------- */

.error-page {
  padding: 5rem 0;
  text-align: center;
}

.error-page .error-code {
  font-size: 5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0;
}