:root {
  --online-hero-bg:
    radial-gradient(circle at top left, rgba(15, 93, 122, 0.14), transparent 32%),
    linear-gradient(145deg, #f7fbfd 0%, #eef7fa 100%);
  --online-card-shadow: 0 18px 44px rgba(15, 93, 122, 0.12);
  --online-soft-border: rgba(215, 229, 235, 0.9);
}

.online-hero {
  background: var(--online-hero-bg);
  padding: 5rem 0 4rem;
}

.online-hero-grid,
.online-form-layout,
.join-layout,
.success-layout {
  display: grid;
  gap: 1.5rem;
}

.online-hero-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  align-items: center;
}

.online-hero-copy h1,
.form-card-title,
.join-panel h2,
.success-card h1 {
  font-family: "Poppins", sans-serif;
}

.online-hero-copy h1 {
  margin: 0.8rem 0 1rem;
  font-size: clamp(2.3rem, 4vw, 3.8rem);
  line-height: 1.15;
}

.online-hero-copy p,
.hero-note,
.section-intro,
.support-text,
.inline-note,
.limitations-list,
.success-card p {
  color: var(--muted);
}

.hero-note {
  margin-top: 1rem;
  font-weight: 600;
}

.hero-points,
.info-list,
.limitations-list {
  margin: 0;
  padding-left: 1.1rem;
}

.hero-points {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.online-highlight-card,
.form-card,
.join-panel,
.meeting-panel,
.success-card {
  background: var(--surface);
  border: 1px solid var(--online-soft-border);
  border-radius: 24px;
  box-shadow: var(--online-card-shadow);
}

.online-highlight-card {
  padding: 1.75rem;
}

.highlight-stats {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.highlight-stat {
  padding: 1rem 1.1rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface-alt);
}

.highlight-stat strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--primary);
  font-family: "Poppins", sans-serif;
}

.online-section {
  padding: 4.5rem 0;
}

.online-form-layout {
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  align-items: start;
}

.form-support-card {
  position: sticky;
  top: 110px;
  padding: 1.5rem;
}

.support-card-title {
  margin: 0.75rem 0;
  font-family: "Poppins", sans-serif;
}

.support-box {
  padding: 1rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(15, 93, 122, 0.08), rgba(23, 152, 117, 0.08));
  border: 1px solid var(--border);
}

.support-box + .support-box {
  margin-top: 1rem;
}

.support-box strong {
  display: block;
  margin-bottom: 0.35rem;
}

.form-card {
  padding: 2rem;
}

.form-card-title {
  margin: 0.55rem 0 0.65rem;
  font-size: 1.9rem;
}

.section-intro {
  margin-bottom: 1.5rem;
}

.online-form {
  display: grid;
  gap: 1rem;
}

.online-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.online-field {
  display: grid;
  gap: 0.45rem;
}

.online-field.full-width {
  grid-column: 1 / -1;
}

.online-field label {
  font-weight: 700;
  color: var(--text);
}

.online-field input,
.online-field select,
.online-field textarea {
  background: #fbfdff;
  border: 1px solid #cfe0e7;
  border-radius: 16px;
  padding: 0.95rem 1rem;
}

.online-field textarea {
  min-height: 140px;
  resize: vertical;
}

.online-field input:focus,
.online-field select:focus,
.online-field textarea:focus {
  background: #ffffff;
}

.submit-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.submit-note {
  font-size: 0.96rem;
  color: var(--muted);
}

.subtle-note {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.tab-switcher {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
}

.tab-switcher button {
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--muted);
  padding: 0.9rem 1.15rem;
  border-radius: 999px;
  font-weight: 700;
  transition: all 0.2s ease;
}

.tab-switcher button.is-active {
  background: linear-gradient(135deg, var(--primary), #1180a0);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 12px 28px rgba(15, 93, 122, 0.2);
}

.join-layout {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  align-items: start;
}

.join-panel,
.meeting-panel {
  padding: 1.75rem;
}

.join-panel {
  display: grid;
  gap: 1.5rem;
}

.panel-header h2,
.meeting-panel h2 {
  margin: 0.55rem 0 0.6rem;
}

.panel-copy {
  margin: 0;
}

.tab-content[hidden] {
  display: none !important;
}

.room-code-box,
.message-box,
.limitations-box {
  border-radius: 18px;
  padding: 1rem 1.1rem;
}

.room-code-box {
  background: rgba(15, 93, 122, 0.08);
  border: 1px solid rgba(15, 93, 122, 0.14);
}

.room-code-box strong {
  display: block;
  margin-bottom: 0.25rem;
}

.room-code-value {
  font-family: "Poppins", sans-serif;
  font-size: 1.05rem;
  color: var(--primary);
  word-break: break-word;
}

.message-box {
  border: 1px solid transparent;
  font-weight: 600;
}

.message-box.is-info {
  background: rgba(15, 93, 122, 0.08);
  border-color: rgba(15, 93, 122, 0.15);
  color: var(--primary);
}

.message-box.is-error {
  background: rgba(198, 57, 57, 0.08);
  border-color: rgba(198, 57, 57, 0.18);
  color: #b33535;
}

.meeting-panel {
  min-height: 100%;
}

.meeting-stage {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at top, rgba(23, 152, 117, 0.08), transparent 35%),
    #091822;
  min-height: 700px;
}

.meeting-placeholder {
  min-height: 700px;
  display: grid;
  place-items: center;
  padding: 2rem;
  text-align: center;
  color: #e7f3f7;
}

.meeting-placeholder h3 {
  margin-bottom: 0.75rem;
  font-family: "Poppins", sans-serif;
}

.meeting-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.limitations-box {
  margin-top: 1rem;
  border: 1px solid var(--border);
  background: var(--surface-alt);
}

.limitations-box h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  font-family: "Poppins", sans-serif;
}

.success-page {
  min-height: calc(100vh - 220px);
  display: grid;
  place-items: center;
  padding: 4rem 0;
}

.success-layout {
  max-width: 760px;
}

.success-card {
  padding: 2.25rem;
  text-align: center;
}

.success-badge {
  width: 78px;
  height: 78px;
  margin: 0 auto 1.2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--secondary), #49b490);
  color: #ffffff;
  font-size: 1.5rem;
  font-family: "Poppins", sans-serif;
  font-weight: 700;
}

.success-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

@media (max-width: 1080px) {
  .online-hero-grid,
  .online-form-layout,
  .join-layout {
    grid-template-columns: 1fr;
  }

  .form-support-card {
    position: static;
  }
}

@media (max-width: 820px) {
  .online-hero,
  .online-section {
    padding: 4rem 0;
  }

  .online-form-grid {
    grid-template-columns: 1fr;
  }

  .form-card,
  .join-panel,
  .meeting-panel,
  .success-card {
    padding: 1.35rem;
  }

  .meeting-stage,
  .meeting-placeholder {
    min-height: 540px;
  }
}

@media (max-width: 560px) {
  .submit-strip,
  .meeting-controls,
  .success-actions {
    align-items: stretch;
  }

  .submit-strip .btn,
  .meeting-controls .btn,
  .success-actions .btn {
    width: 100%;
  }

  .tab-switcher {
    display: grid;
  }

  .tab-switcher button {
    width: 100%;
  }
}