.welcome-popup
{
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:rgba(0,0,0,0.6);
display:none;
display:flex;
justify-content:center;
align-items:center;
z-index:9999;
}

.popup-box
{
background:#fff;
padding:40px;
border-radius:12px;
width:320px;
text-align:center;
box-shadow:0 15px 40px rgba(0,0,0,0.2);
animation:popup 0.4s ease;
}

@keyframes popup
{
from
{
transform:scale(0.7);
opacity:0;
}
to
{
transform:scale(1);
opacity:1;
}
}

.popup-box h3
{
color:#5c050f;
margin-bottom:10px;
}

.popup-box button
{
margin-top:20px;
padding:10px 25px;
border:none;
background:linear-gradient(135deg, var(--primary), var(--accent));
color:white;
border-radius:6px;
cursor:pointer;
}













:root {
  --bg-body: #eef2f7;
  --bg-card: #ffffff;
  --text-bright: #0f172a;
  --text: #334155;
  --text-muted: #64748b;
  --border: rgba(15, 23, 42, 0.08);
  --accent: #22d3ee;
  --accent-strong: #0891b2;
  --violet: #7c3aed;
  --success: #059669;
  --danger: #e11d48;
  --radius: 14px;
  --radius-input: 10px;
  --shadow-card: 0 14px 36px rgba(15, 23, 42, 0.08);
  --shadow-card-hover: 0 20px 44px rgba(15, 23, 42, 0.12);
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 20px;
  --space-5: 24px;
  --space-6: 32px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 10%, rgba(8, 145, 178, 0.08), transparent 30%),
    radial-gradient(circle at 90% 15%, rgba(124, 58, 237, 0.08), transparent 36%),
    linear-gradient(145deg, #eef2f7 0%, #f8fafc 100%);
  line-height: 1.55;
  font-size: 15px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 55%, #0f172a 100%);
  border-bottom: 1px solid rgba(167, 139, 250, 0.2);
  backdrop-filter: blur(14px);
}

.topbar__inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand__logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #0f172a;
  background: linear-gradient(135deg, #22d3ee 0%, #a78bfa 100%);
}

.brand__text {
  color: #f1f5f9;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.topbar__menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.topbar__menu-link {
  color: rgba(226, 232, 240, 0.74);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 10px;
  transition: all 0.18s ease;
}

.topbar__menu-link:hover {
  color: #22d3ee;
  background: rgba(34, 211, 238, 0.12);
}

.topbar__menu-link--active {
  color: #fff;
  background: linear-gradient(135deg, #0891b2 0%, #7c3aed 100%);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.28), 0 0 30px rgba(124, 58, 237, 0.22);
}

.page-main {
  padding-bottom: 56px;
}

.hero-head__box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
}

.hero-head__eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-weight: 700;
  color: var(--accent-strong);
}

.hero-head__title {
  color: var(--text-bright);
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.6px;
  line-height: 1.15;
}

.hero-head__subtitle {
  color: var(--text-muted);
  max-width: 72ch;
}

.premium-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  transition: box-shadow 0.28s ease, transform 0.28s ease;
}

.premium-form-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.premium-form-card__head {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(8, 145, 178, 0.16);
}

.premium-form-card__head h2 {
  font-size: clamp(1.3rem, 2.2vw, 1.55rem);
  font-weight: 750;
  color: var(--text-bright);
  letter-spacing: -0.25px;
}

.premium-form-card__head p {
  color: var(--text-muted);
}

.form-floating > .form-control,
.form-floating > .form-select,
.form-control-file {
  border-radius: var(--radius-input);
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: #fff;
  transition: border-color 0.24s ease, box-shadow 0.24s ease, transform 0.2s ease;
}

.form-floating > .form-control,
.form-floating > .form-select {
  min-height: 56px;
  padding-top: 1.35rem;
}

.form-control--textarea {
  height: 130px !important;
}

.form-floating > label {
  color: var(--text-muted);
  transition: color 0.2s ease, opacity 0.2s ease;
}

.form-control:focus,
.form-select:focus,
.form-control-file:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.26rem rgba(34, 211, 238, 0.2);
  animation: focus-glow 320ms ease;
}

.form-floating:focus-within > label {
  color: var(--accent-strong);
}

.form-control.is-valid,
.form-select.is-valid {
  border-color: var(--success);
  box-shadow: 0 0 0 0.2rem rgba(5, 150, 105, 0.16);
}

.form-control.is-invalid,
.form-select.is-invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 0.2rem rgba(225, 29, 72, 0.14);
}

.invalid-feedback {
  font-size: 0.78rem;
}

.valid-feedback {
  font-size: 0.78rem;
}

@keyframes focus-glow {
  0% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.18); }
  100% { box-shadow: 0 0 0 0.26rem rgba(34, 211, 238, 0.2); }
}

.btn-submit {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: none;
  border-radius: 999px;
  padding: 12px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #0891b2 0%, #7c3aed 100%);
  box-shadow: 0 10px 24px rgba(8, 145, 178, 0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease, filter 0.3s ease;
}

.btn-submit::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: linear-gradient(105deg, transparent 25%, rgba(255, 255, 255, 0.42) 50%, transparent 75%);
  transform: translateX(-140%);
  transition: transform 0.55s ease;
  z-index: -1;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(8, 145, 178, 0.28), 0 0 18px rgba(124, 58, 237, 0.2);
  filter: brightness(1.05);
}

.btn-submit:hover::before {
  transform: translateX(140%);
}

.btn-submit:active {
  transform: translateY(0);
}

.section-title h3 {
  color: var(--text-bright);
  font-size: clamp(1.25rem, 2vw, 1.45rem);
  font-weight: 750;
  letter-spacing: -0.4px;
}

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

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(260px, 38%) 1fr;
  transition: box-shadow 0.28s ease, transform 0.28s ease;
}

.auth-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.auth-card--reverse {
  grid-template-columns: 1fr minmax(260px, 38%);
}

.auth-card--reverse .auth-card__media {
  order: 2;
}

.auth-card--reverse .auth-card__content {
  order: 1;
}

.auth-card__media {
  min-height: 360px;
  background:
    linear-gradient(160deg, rgba(15, 23, 42, 0.42), rgba(30, 27, 75, 0.42)),
    url("../images/coding-and-robotics.jpg");
  background-size: cover;
  background-position: center;
}

.auth-card__content {
  padding: var(--space-5);
}

.auth-card__content h4 {
  color: var(--text-bright);
  font-weight: 750;
}

.link-accent {
  color: var(--accent-strong);
  text-decoration: none;
}

.link-accent:hover {
  color: var(--violet);
}

.site-footer {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 55%, #0f172a 100%);
  border-top: 1px solid rgba(167, 139, 250, 0.2);
  color: rgba(226, 232, 240, 0.8);
  padding: 16px 0;
  margin-top: 8px;
}

.site-footer__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.site-footer__links {
  display: inline-flex;
  gap: 14px;
}

.site-footer__links a {
  color: rgba(226, 232, 240, 0.82);
  text-decoration: none;
  font-size: 0.88rem;
}

.site-footer__links a:hover {
  color: #22d3ee;
}

@media (max-width: 991.98px) {
  .auth-card,
  .auth-card--reverse {
    grid-template-columns: 1fr;
  }

  .auth-card__media,
  .auth-card--reverse .auth-card__media {
    order: 1;
    min-height: 250px;
  }

  .auth-card__content,
  .auth-card--reverse .auth-card__content {
    order: 2;
  }
}

@media (max-width: 767.98px) {
  .hero-head__box,
  .premium-form-card,
  .auth-card__content {
    padding: var(--space-4);
  }

  .topbar__inner {
    min-height: 56px;
  }

  .brand__text {
    font-size: 0.92rem;
  }

  .premium-form-card__head {
    margin-bottom: var(--space-4);
  }

  .premium-form-card__head h2 {
    font-size: 1.2rem;
  }

  .btn-submit {
    width: 100%;
  }
}

@media (max-width: 575.98px) {
  .hero-head__box,
  .premium-form-card,
  .auth-card__content {
    padding: var(--space-3);
  }

  .auth-card__media,
  .auth-card--reverse .auth-card__media {
    min-height: 210px;
  }

  .section-title {
    margin-bottom: var(--space-3) !important;
  }
}