:root {
  --bg-light: #f5f5f5;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --accent: #800000;
  --text-dark: #013938;
  --panel: rgba(255, 255, 255, 0.92);
  --line: rgba(1, 57, 56, 0.14);
  --gold: #b8860b;
  --porul-bg: rgba(31, 58, 95, 0.06);
  --porul-color: #1f3a5f;
}
* { box-sizing: border-box; }
html { overflow-x: hidden; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Poppins', 'Noto Sans Tamil', sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  overflow-x: hidden;
  position: relative;
}

/* ===== Cyber background (same as main site) ===== */
canvas#cyber-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* ===== Header — same structure/theme as main site ===== */
header {
  background-color: var(--nav-bg);
  color: var(--text-dark);
  padding: 10px;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.logo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 0.5rem;
}
.header-text h1 {
  margin: 5px 0;
  font-family: 'Noto Sans Tamil', 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: bold;
  text-align: center;
  color: var(--text-dark);
}
.header-text h1.en { font-family: 'Poppins', sans-serif; }
.site-tagline {
  margin: 8px 0 0;
  text-align: center;
  line-height: 1.45;
  font-family: 'IBM Plex Mono', monospace;
}
.site-tagline span {
  display: block;
  color: var(--accent);
  font-style: italic;
}
.site-tagline [lang="ta"] {
  font-family: 'Noto Sans Tamil', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
}
.site-tagline .tagline-en {
  font-size: 0.68rem;
  font-weight: 400;
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: .4px;
}

/* ===== Thirukkural rotator (synced across all visitors by clock time) ===== */
.kural-box {
  position: relative;
  z-index: 5;
  margin: 20px auto 0;
  width: 100%;
  max-width: 480px;
  text-align: center;
  padding: 0 16px;
  overflow: hidden;
}
.kural-box .kno {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--gold);
  letter-spacing: .5px;
  margin-bottom: 6px;
}
.kural-box .ktext {
  font-family: 'Noto Sans Tamil', sans-serif;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.5;
  margin: 0 0 8px;
  transition: opacity .4s ease;
}
.kural-box .ktext .l1,
.kural-box .ktext .l2 {
  display: block;
  width: max-content;   /* natural text width, so JS can measure it */
  margin: 0 auto;
  white-space: nowrap;
  font-size: 17px;      /* JS auto-shrinks this to fit the box */
}
.kural-box .kporul {
  font-family: 'Noto Sans Tamil', sans-serif;
  font-size: 13px;
  color: var(--porul-color);
  background: var(--porul-bg);
  border-left: 3px solid var(--porul-color);
  border-radius: 6px;
  padding: 10px 14px;
  line-height: 1.55;
  text-align: left;
  transition: opacity .4s ease;
}
.kural-box .kporul b {
  color: var(--accent);
  font-weight: 700;
}
.fade { opacity: 0; }

/* ===== Mail sign-in section ===== */
main {
  position: relative;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 20px 30px;
}
.card {
  background: var(--panel);
  width: 100%;
  max-width: 380px;
  padding: 40px 34px;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 34px rgba(1, 57, 56, 0.12);
  text-align: center;
}
a.btn {
  display: block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 13px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: opacity .15s ease;
}
a.btn:hover { opacity: .9; }

.platform-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0 0 10px;
  text-align: left;
}
.platform-note .zoho-logo {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}
.platform-note p {
  margin: 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  line-height: 1.5;
  color: rgba(1, 57, 56, 0.55);
}

footer {
  position: relative;
  z-index: 5;
  text-align: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: rgba(1, 57, 56, 0.45);
  padding: 10px 20px 30px;
}
.platform-note .note-en { font-family: 'Poppins', sans-serif; }

/* ===== Desktop header: logo on the left, text beside it (matches main site) ===== */
@media (min-width: 768px) {
  header { padding: 12px 20px; }
  .header-content {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
  }
  .logo {
    width: 100px;
    height: 100px;
    margin-bottom: 0;
    flex-shrink: 0;
  }
  .header-text h1 { font-size: 1.1rem; }
}