:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #eaf1f8;
  background: #07111f;
  font-synthesis: none;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }

.page-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
  background:
    radial-gradient(circle at 10% 15%, rgba(16, 185, 129, .18), transparent 32%),
    radial-gradient(circle at 65% 90%, rgba(37, 99, 235, .16), transparent 30%),
    #07111f;
}

.course-intro,
.form-card { padding: clamp(36px, 7vw, 96px); }

.course-intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow,
.form-kicker {
  margin: 0 0 18px;
  color: #5ee0b3;
  font-size: .77rem;
  font-weight: 800;
  letter-spacing: .18em;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(3rem, 7vw, 6.7rem);
  line-height: .9;
  letter-spacing: -.065em;
}

.lead {
  max-width: 620px;
  margin: 30px 0 44px;
  color: #afbed0;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.course-details { display: grid; gap: 18px; max-width: 620px; }
.course-details article { display: flex; align-items: center; gap: 18px; }
.course-details article > span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border: 1px solid rgba(94, 224, 179, .35);
  border-radius: 50%;
  color: #5ee0b3;
  font-size: .75rem;
  font-weight: 800;
}
.course-details strong,
.course-details small { display: block; }
.course-details small { margin-top: 4px; color: #8293a7; }

.form-card {
  align-self: center;
  margin: 36px 36px 36px 0;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 28px;
  background: rgba(13, 30, 50, .88);
  box-shadow: 0 30px 90px rgba(0, 0, 0, .32);
  backdrop-filter: blur(18px);
}

h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.3rem); letter-spacing: -.045em; }
.form-description { margin: 12px 0 28px; color: #9caec2; line-height: 1.55; }

form { display: grid; gap: 11px; }
label { margin-top: 7px; color: #dbe7f2; font-size: .88rem; font-weight: 700; }
input[type="text"],
input[type="email"],
input[type="tel"] {
  width: 100%;
  padding: 14px 15px;
  border: 1px solid #31445a;
  border-radius: 11px;
  background: #091725;
  color: #fff;
  font: inherit;
  outline: none;
}
input[type="password"] {
  width: 100%;
  padding: 14px 15px;
  border: 1px solid #31445a;
  border-radius: 11px;
  background: #091725;
  color: #fff;
  font: inherit;
  outline: none;
}
input:focus { border-color: #5ee0b3; box-shadow: 0 0 0 3px rgba(94, 224, 179, .12); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field-row > div { display: grid; gap: 11px; }

.consent { display: flex; align-items: flex-start; gap: 10px; margin: 15px 0; color: #9caec2; font-weight: 400; line-height: 1.45; }
.consent input { margin-top: 3px; accent-color: #5ee0b3; }

button {
  padding: 15px 22px;
  border: 0;
  border-radius: 999px;
  background: #5ee0b3;
  color: #07111f;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
  transition: transform .2s ease, opacity .2s ease;
}
button:hover { transform: translateY(-2px); }
button:disabled { cursor: wait; opacity: .65; }

.alert { margin-bottom: 18px; padding: 13px 15px; border-radius: 10px; line-height: 1.45; }
.alert.error { background: rgba(239, 68, 68, .14); color: #fecaca; border: 1px solid rgba(239, 68, 68, .25); }
.alert.success { background: rgba(16, 185, 129, .14); color: #a7f3d0; border: 1px solid rgba(16, 185, 129, .25); }

@media (max-width: 900px) {
  .page-shell { grid-template-columns: 1fr; }
  .course-intro { padding-bottom: 24px; }
  .form-card { margin: 0 20px 30px; }
}

@media (max-width: 560px) {
  .course-intro, .form-card { padding: 30px 22px; }
  .field-row { grid-template-columns: 1fr; }
  h1 { font-size: clamp(3rem, 17vw, 5rem); }
}

.import-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: radial-gradient(circle at 20% 15%, rgba(16, 185, 129, .18), transparent 32%), #07111f;
}
.import-card {
  width: min(720px, 100%);
  padding: clamp(30px, 6vw, 58px);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 28px;
  background: rgba(13, 30, 50, .92);
  box-shadow: 0 30px 90px rgba(0, 0, 0, .32);
}
.import-title { margin: 0; font-size: clamp(2.4rem, 7vw, 4.5rem); line-height: 1; }
.download-link,
.back-link { display: inline-block; color: #5ee0b3; font-weight: 800; }
.download-link { margin: 0 0 28px; }
.back-link { margin-top: 24px; }
.import-form { padding-top: 10px; }
.import-form input[type="file"] {
  padding: 14px;
  border: 1px dashed #4b6076;
  border-radius: 11px;
  background: #091725;
  color: #b8c5d4;
}
.import-result { display: grid; gap: 6px; margin: 0 0 22px; padding: 16px; border-radius: 12px; }
.import-result.success { background: rgba(16, 185, 129, .14); border: 1px solid rgba(16, 185, 129, .25); }
.import-result.warning { background: rgba(245, 158, 11, .13); border: 1px solid rgba(245, 158, 11, .25); }
.import-result details { margin-top: 8px; }
.import-result li { margin: 6px 0; }
.login-card { max-width: 520px; }
.logout-link { float: right; color: #fca5a5; }
.admin-list-link { margin-left: 20px; }
.admin-shell { min-height: 100vh; padding: 30px; background: #07111f; }
.admin-panel { width: min(1400px, 100%); margin: 0 auto; }
.admin-header { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 24px; }
.admin-title { margin: 0; font-size: clamp(2.7rem, 6vw, 5rem); line-height: 1; }
.admin-nav { display: flex; gap: 12px; }
.admin-nav a, .edit-link, .pagination a {
  padding: 9px 13px;
  border: 1px solid #31445a;
  border-radius: 9px;
  color: #dbe7f2;
  text-decoration: none;
  font-weight: 750;
}
.admin-nav .danger-link { color: #fca5a5; }
.search-form { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.search-form input[type="search"] {
  min-width: 0;
  flex: 1;
  padding: 14px 15px;
  border: 1px solid #31445a;
  border-radius: 11px;
  background: #091725;
  color: #fff;
  font: inherit;
}
.search-form a { color: #9caec2; }
.table-wrap { overflow-x: auto; border: 1px solid #24384d; border-radius: 16px; }
table { width: 100%; border-collapse: collapse; background: #0c1c2d; }
th, td { padding: 15px; border-bottom: 1px solid #24384d; text-align: left; vertical-align: top; }
th { color: #8fa2b7; font-size: .75rem; letter-spacing: .07em; text-transform: uppercase; }
td { color: #dbe7f2; font-size: .9rem; }
td span, td small { display: block; }
td small { margin-top: 5px; color: #8fa2b7; }
tbody tr:hover { background: rgba(94, 224, 179, .035); }
.empty-state { padding: 40px; text-align: center; color: #8fa2b7; }
.pagination { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.pagination a.active { background: #5ee0b3; color: #07111f; border-color: #5ee0b3; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.edit-card { max-width: 650px; }

@media (max-width: 700px) {
  .admin-shell { padding: 20px 12px; }
  .admin-header { align-items: flex-start; flex-direction: column; }
  .search-form { align-items: stretch; flex-direction: column; }
  .search-form button { width: 100%; }
}