*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 20px;
}

:root {
  --green: #abcd03;
  --dark: #131313;
  --input-bg: #1e1e1e;
  --input-border: #3a3a3a;
  --text: #fff;
  --text-muted: #aaa;
  --font: 'Noto Sans TC', sans-serif;
}

body {
  background: #131313;
  color: var(--text);
  font-family: var(--font);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

.reg-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  display: block;
  z-index: -1;
  pointer-events: none;
}

/* ?€?€ Top event logo ?€?€ */
.reg-top-logo {
  padding: 48px 24px 16px;
}

.reg-top-logo-inner {
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
}

.reg-top-logo-img {
  max-width: 800px;
  width: 100%;
  height: auto;
  display: block;
  margin-left: 100px;
}

/* ── Hero block (logos A + B stacked, 工作區域 3 background) ── */
.reg-hero {
  background: url('../images/reg_images_2x/工作區域%203@2x.png') center / cover no-repeat;
  padding: 25px 24px;
}

.reg-hero-inner {
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.reg-hero-logo {
  max-width: 480px;
  width: 100%;
  height: auto;
  display: block;
}

/* ?€?€ Form area ?€?€ */
.reg-form-area {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 0 24px;
}

.reg-form-box {
  width: 100%;
  max-width: 1300px;
  border: 2px solid var(--green);
  padding: 44px 40px 52px;
  border-radius: 32px;
  background-color: var(--dark);
}

.reg-form-title {
  font-size: clamp(2rem, 3.5vw, 3.15rem);
  font-weight: 700;
  letter-spacing: 6px;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text);
}

.reg-form-divider {
  text-align: center;
  margin-bottom: 44px;
}

.reg-form-divider img {
  width: 100%;
  height: auto;
  display: block;
}

/* ?€?€ Form sections ?€?€ */
.form-section {
  margin-bottom: 36px;
}

.form-sec-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--green);
  border-bottom: 1px solid #2e2e2e;
  padding-bottom: 10px;
  margin-bottom: 24px;
}

.form-row {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 1rem;
  color: #fff;
  margin-bottom: 7px;
  letter-spacing: 1px;
}

.form-label.req::after {
  content: ' *';
  color: var(--green);
}

/* ?€?€ Text inputs & select ?€?€ */
.form-input,
.form-select {
  width: 100%;
  background: #ffffff;
  border: 1px solid #d0d0d0;
  color: #131313;
  font-family: var(--font);
  font-size: 1rem;
  padding: 6px 10px;
  outline: none;
  transition: border-color 0.2s;
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--green);
}

.form-input::placeholder {
  color: #999;
}

.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23555' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

.form-select option {
  background: #ffffff;
  color: #131313;
}

/* ?€?€ Radio buttons ?€?€ */
.form-radios {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-left: 1em;
}

.form-radios.col {
  flex-direction: column;
  gap: 10px;
}

.radio-opt {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  font-size: 1rem;
  color: #fff;
  line-height: 1.5;
  user-select: none;
}

.radio-opt input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid #888;
  border-radius: 50%;
  background: #ffffff;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s;
}

.radio-opt input[type="radio"]:checked {
  border-color: var(--green);
  background: var(--green);
}

.radio-opt input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  background: var(--dark);
  border-radius: 50%;
}

/* ?€?€ Checkboxes ?€?€ */
.check-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 1em;
  cursor: pointer;
  font-size: 1rem;
  color: #fff;
  line-height: 1.65;
  user-select: none;
}

.check-opt.req-check>span::after {
  content: ' *';
  color: var(--green);
}

.check-opt input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid #888;
  background: #ffffff;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s, background 0.15s;
}

.check-opt input[type="checkbox"]:checked {
  background: var(--green);
  border-color: var(--green);
}

.check-opt input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 5px;
  width: 4px;
  height: 8px;
  border: 2px solid var(--dark);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

/* ?€?€ Survey checkbox groups ?€?€ */
.form-checks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-left: 1em;
}

.check-tag {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  font-size: 1rem;
  color: #fff;
  line-height: 1.5;
  user-select: none;
}

.check-tag input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid #888;
  background: #ffffff;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s, background 0.15s;
}

.check-tag input[type="checkbox"]:checked {
  background: var(--green);
  border-color: var(--green);
}

.check-tag input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 5px;
  width: 4px;
  height: 8px;
  border: 2px solid var(--dark);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

/* ?€?€ Textarea ?€?€ */
.form-textarea {
  width: 100%;
  background: #ffffff;
  border: 1px solid #d0d0d0;
  color: #131313;
  font-family: var(--font);
  font-size: 1rem;
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.2s;
  border-radius: 0;
  resize: vertical;
  min-height: 120px;
  -webkit-appearance: none;
  appearance: none;
}

.form-textarea:focus {
  border-color: var(--green);
}

.form-textarea::placeholder {
  color: #999;
}

/* ?€?€ Afternoon row (conditional) ?€?€ */
.form-row.hidden {
  display: none;
}

/* ?€?€ Validation error states ?€?€ */
.form-input.invalid,
.form-select.invalid {
  border-color: #e0334c;
}

.field-error {
  font-size: 0.75rem;
  color: #e0334c;
  margin-top: 5px;
  letter-spacing: 0.5px;
}

/* ?€?€ Submit result modal ?€?€ */
.reg-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.reg-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.reg-modal-box {
  background: var(--dark);
  border: 2px solid var(--green);
  border-radius: 16px;
  padding: 48px 40px;
  max-width: 480px;
  width: calc(100% - 48px);
  text-align: center;
}

.reg-modal-icon {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1;
}

.reg-modal-icon.success {
  color: var(--green);
}

.reg-modal-icon.success::before {
  content: '??;

}

.reg-modal-icon.error {
  color: #f2631d;
}

.reg-modal-icon.error::before {
  content: '??;

}

.reg-modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 12px;
  color: var(--text);
}

.reg-modal-msg {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.reg-modal-close {
  background: var(--green);
  color: var(--dark);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 3px;
  padding: 12px 48px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.reg-modal-close:hover {
  opacity: 0.85;
}

/* ?€?€ Submit ?€?€ */
.form-submit {
  margin-top: 36px;
  text-align: center;
}

.btn-submit {
  background: var(--green);
  color: var(--dark);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 4px;
  padding: 14px 64px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-submit:hover {
  opacity: 0.85;
}

/* ?€?€ Footer ?€?€ */
.reg-footer {
  background: var(--green);
  padding: 24px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-shrink: 0;
}

.reg-footer-logo {
  height: 32px;
  width: auto;
}

.reg-footer-contact {
  font-size: 0.82rem;
  color: var(--dark);
  font-weight: 500;
  letter-spacing: 1px;
}

/* ?€?€ Mobile ?€?€ */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .reg-top-logo-img {
    margin-left: 0px;
  }

  .reg-hero {
    padding: 18px 16px;
    gap: 16px;
  }

  .reg-hero-logo {
    max-width: 320px;
  }

  .reg-form-area {
    padding: 40px 16px;
  }

  .reg-form-box {
    padding: 28px 20px 36px;
  }

  .btn-submit {
    width: 100%;
    padding: 14px 0;
  }

  .reg-footer {
    padding: 16px 24px;
    flex-direction: column;
    gap: 8px;
  }
}