.fsz-form-card {
    position: relative;
    padding: clamp(24px, 3vw, 42px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(13, 18, 23, 0.96);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
    backdrop-filter: blur(18px);
  }

  .fsz-form-card::before {
    content: "";
    position: absolute;
    top: -1px;
    left: -1px;
    width: 42%;
    height: 3px;
    background: linear-gradient(90deg, var(--fsz-accent), var(--fsz-red));
  }

  .fsz-form-eyebrow {
    margin: 0 0 8px;
    color: var(--fsz-accent);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.16em;
    text-transform: uppercase;
  }

  .fsz-form-title {
    margin: 0;
    font-size: clamp(25px, 2.4vw, 36px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.02em;
  }

  .fsz-form-copy {
    margin: 12px 0 22px;
    color: var(--fsz-muted);
    font-size: 15px;
    line-height: 1.55;
  }

  .fsz-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 7px;
    margin: 0 0 24px;
    padding: 5px;
    border: 1px solid var(--fsz-line);
    background: rgba(0, 0, 0, 0.22);
  }

  .fsz-tab {
    min-height: 62px;
    padding: 9px;
    border: 1px solid transparent;
    border-radius: 0;
    color: #b6bec5;
    background: transparent;
    font: inherit;
    font-size: 12px;
    font-weight: 900;
    line-height: 1.3;
    letter-spacing: 0.06em;
    text-align: center;
    text-transform: uppercase;
    cursor: pointer;
  }

  .fsz-tab span {
    display: block;
    margin-top: 4px;
    color: #f06b73;
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .fsz-tab[aria-selected="true"] {
    border-color: rgba(227, 6, 19, 0.7);
    color: #fff;
    background: rgba(227, 6, 19, 0.13);
  }

  .fsz-tab:focus-visible,
  .fsz-submit:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
  }

  .fsz-panel[hidden],
  .fsz-conditional[hidden] {
    display: none !important;
  }

  .fsz-panel-label {
    display: inline-flex;
    margin: 0 0 16px;
    padding: 7px 10px;
    border-left: 3px solid var(--fsz-accent);
    color: #eef0f1;
    background: rgba(227, 6, 19, 0.08);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .fsz-segment-promise {
    margin: 0 0 20px;
    padding: 16px 17px;
    border: 1px solid rgba(227, 6, 19, 0.34);
    border-left: 4px solid var(--fsz-accent);
    color: #c8ced3;
    background: linear-gradient(110deg, rgba(227, 6, 19, 0.105), rgba(255, 255, 255, 0.025));
    font-size: 14px;
    line-height: 1.6;
  }

  .fsz-segment-promise strong {
    display: block;
    margin-bottom: 5px;
    color: #fff;
    font-size: 15px;
    line-height: 1.35;
  }

  .fsz-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 13px;
  }

  .fsz-field {
    display: flex;
    flex-direction: column;
    gap: 7px;
  }

  .fsz-wide {
    grid-column: 1 / -1;
  }

  .fsz-field label,
  .fsz-choice-group legend {
    color: #e4e8eb;
    font-size: 13px;
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: 0.025em;
  }

  .fsz-field input,
  .fsz-field textarea,
  .fsz-field select {
    width: 100%;
    min-height: 47px;
    margin: 0;
    padding: 0 13px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0;
    outline: 0;
    color: #fff;
    background: rgba(255, 255, 255, 0.055);
    font: inherit;
    font-size: 16px;
    box-shadow: none;
  }

  .fsz-field select option {
    color: #111;
    background: #fff;
  }

  .fsz-field textarea {
    min-height: 88px;
    padding-top: 12px;
    padding-bottom: 12px;
    line-height: 1.45;
    resize: vertical;
  }

  .fsz-field input::placeholder,
  .fsz-field textarea::placeholder {
    color: rgba(220, 226, 231, 0.43);
  }

  .fsz-field input:focus,
  .fsz-field textarea:focus,
  .fsz-field select:focus {
    border-color: var(--fsz-accent);
    box-shadow: 0 0 0 3px rgba(227, 6, 19, 0.12);
  }

  .fsz-invalid {
    border-color: var(--fsz-error) !important;
    box-shadow: 0 0 0 3px rgba(255, 79, 70, 0.2) !important;
  }

  .fsz-field.fsz-has-error,
  .fsz-consent.fsz-has-error,
  .fsz-choice-group.fsz-invalid-group,
  .fsz-additional-section.fsz-invalid-group {
    outline: 2px solid rgba(255, 122, 113, 0.95);
    outline-offset: 4px;
    background: rgba(227, 6, 19, 0.09);
    box-shadow: 0 0 0 7px rgba(227, 6, 19, 0.08);
    animation: fsz-error-pulse 0.8s ease-out 1;
  }

  .fsz-field.fsz-has-error > label,
  .fsz-consent.fsz-has-error > span,
  .fsz-choice-group.fsz-invalid-group > legend {
    color: #ffd0cc;
  }

  .fsz-inline-error {
    display: block;
    margin: 7px 0 0;
    color: #ffb3ad;
    font-size: 12px;
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: 0.01em;
  }

  .fsz-consent.fsz-has-error {
    flex-wrap: wrap;
    padding: 10px;
  }

  .fsz-consent.fsz-has-error > span {
    flex: 1 1 calc(100% - 30px);
  }

  .fsz-consent .fsz-inline-error {
    flex: 0 0 100%;
    margin: 2px 0 0 26px;
  }

  @keyframes fsz-error-pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 79, 70, 0.52); }
    100% { box-shadow: 0 0 0 12px rgba(255, 79, 70, 0); }
  }

  .fsz-choice-group {
    grid-column: 1 / -1;
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
  }

  .fsz-choice-group legend {
    width: 100%;
    margin: 0 0 8px;
    padding: 0;
  }

  .fsz-choice-group legend small {
    color: var(--fsz-muted);
    font-weight: 600;
  }

  .fsz-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 3px;
    border: 1px solid transparent;
  }

  .fsz-choice-group.fsz-invalid-group .fsz-options {
    border-color: var(--fsz-error);
    background: rgba(227, 6, 19, 0.07);
  }

  .fsz-option {
    display: flex;
    align-items: center;
    gap: 9px;
    min-height: 45px;
    padding: 9px 11px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #e1e5e8;
    background: rgba(255, 255, 255, 0.04);
    font-size: 13px;
    font-weight: 750;
    line-height: 1.35;
    cursor: pointer;
  }

  .fsz-option:hover {
    border-color: rgba(227, 6, 19, 0.7);
    background: rgba(227, 6, 19, 0.08);
  }

  .fsz-option.is-unavailable {
    border-color: rgba(255, 255, 255, 0.09);
    color: #858c92;
    background: rgba(255, 255, 255, 0.018);
    cursor: not-allowed;
  }

  .fsz-option.is-unavailable:hover {
    border-color: rgba(255, 255, 255, 0.09);
    background: rgba(255, 255, 255, 0.018);
  }

  .fsz-option.is-unavailable .fsz-event-date {
    color: #c3c7ca;
    background: #42464a;
  }

  .fsz-option.is-unavailable .fsz-event-city::after {
    content: "BRAK MIEJSC";
    display: block;
    margin-top: 3px;
    color: #8f969c;
    font-size: 10px;
    letter-spacing: 0.1em;
  }

  .fsz-option input,
  .fsz-consent input {
    width: 17px;
    height: 17px;
    min-height: 0;
    margin: 0;
    accent-color: var(--fsz-accent);
    flex: 0 0 auto;
  }

  .fsz-event-option {
    align-items: stretch;
    padding: 0;
  }

  .fsz-event-option input {
    margin: 14px 0 14px 11px;
  }

  .fsz-event-date {
    display: grid;
    place-items: center;
    min-width: 76px;
    padding: 7px;
    color: #fff;
    background: linear-gradient(135deg, #e30613, #990a13);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.04em;
  }

  .fsz-event-city {
    align-self: center;
    padding: 8px 8px 8px 2px;
    font-size: 13px;
    letter-spacing: 0.07em;
  }

  .fsz-consent {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    grid-column: 1 / -1;
    color: #aeb7bf;
    font-size: 12px;
    line-height: 1.45;
    cursor: pointer;
  }

  .fsz-consent input {
    margin-top: 1px;
  }

  .fsz-additional-section {
    grid-column: 1 / -1;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.025);
  }

  .fsz-additional-section.fsz-invalid-group {
    border-color: var(--fsz-error);
  }

  .fsz-additional-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 14px;
  }

  .fsz-additional-heading strong,
  .fsz-additional-heading small {
    display: block;
  }

  .fsz-additional-heading strong {
    color: #fff;
    font-size: 14px;
  }

  .fsz-additional-heading small {
    margin-top: 3px;
    color: var(--fsz-muted);
    font-size: 12px;
    line-height: 1.45;
  }

  .fsz-add-person {
    min-height: 42px;
    padding: 10px 13px;
    border: 1px solid rgba(227, 6, 19, 0.72);
    color: #fff;
    background: rgba(227, 6, 19, 0.13);
    font-size: 12px;
    font-weight: 850;
    line-height: 1.25;
    letter-spacing: 0.035em;
    cursor: pointer;
  }

  .fsz-add-person:hover {
    background: rgba(227, 6, 19, 0.23);
  }

  .fsz-additional-person {
    position: relative;
    min-width: 0;
    margin: 0 0 12px;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.18);
  }

  .fsz-additional-person:last-child {
    margin-bottom: 0;
  }

  .fsz-additional-person legend {
    padding: 0 8px;
    color: #fff;
    font-size: 13px;
    font-weight: 850;
  }

  .fsz-additional-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 13px;
  }

  .fsz-remove-person {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 2;
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.24);
    color: #fff;
    background: rgba(227, 6, 19, 0.18);
    font-size: 21px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
  }

  .fsz-remove-person:hover {
    border-color: var(--fsz-accent);
    background: rgba(227, 6, 19, 0.34);
  }

  .fsz-required {
    color: #f06b73;
  }

  .fsz-submit {
    width: 100%;
    min-height: 54px;
    margin-top: 18px;
    padding: 14px 18px;
    border: 0;
    border-radius: 0;
    color: #fff;
    background: linear-gradient(135deg, #f11623 0%, var(--fsz-accent) 48%, #950b13 100%);
    box-shadow: 0 12px 28px rgba(227, 6, 19, 0.18);
    font: inherit;
    font-size: 14px;
    font-weight: 950;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
  }

  .fsz-submit:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
  }

  .fsz-submit:disabled {
    cursor: wait;
    opacity: 0.68;
    transform: none;
  }

  .fsz-error,
  .fsz-response,
  .fsz-note {
    margin: 12px 0 0;
    font-size: 13px;
    line-height: 1.5;
  }

  .fsz-error {
    display: none;
    color: var(--fsz-error);
    font-weight: 750;
  }

  .fsz-error.is-visible {
    display: block;
  }

  .fsz-response {
    display: none;
    padding: 12px 13px;
    border: 1px solid transparent;
    font-weight: 750;
  }

  .fsz-response.is-success {
    display: block;
    border-color: rgba(126, 214, 155, 0.55);
    color: var(--fsz-success);
    background: rgba(58, 144, 86, 0.16);
  }

  .fsz-response.is-error {
    display: block;
    border-color: rgba(255, 170, 164, 0.55);
    color: var(--fsz-error);
    background: rgba(180, 55, 47, 0.14);
  }

  .fsz-note {
    color: #9ca8b1;
  }

  .fsz-contact {
    margin: 18px 0 0;
    padding-top: 17px;
    border-top: 1px solid var(--fsz-line);
    color: var(--fsz-muted);
    font-size: 14px;
    line-height: 1.5;
  }

  .fsz-contact strong {
    color: #fff;
  }