/* ==================================================
  ALSOK セミナー申し込みフォーム
================================================== */
:root {
  --color-navy: #0b318f;
  --color-navy-deep: #19235a;
  --color-navy-footer: #12183d;
  --color-navy-footer-box: #20254a;
  --color-yellow: #fff100;
  --color-white: #ffffff;
  --color-text: #222222;
  --color-placeholder: #888888;
  --color-input-bg: #f7f8fc;
  --color-input-border: #c5cee8;
  --color-note: #666666;
  --color-error: #d00303;
  --color-error-bg: #efefef;
  --color-link: #37a5ff;
  --color-copy: #9aa3c7;
  --color-page-bg: #baedff;
  --frame-width: 375px;
  --max-width-inner: 343px;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
}

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

body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
  background: var(--color-page-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

.form_bg {
  min-height: 100vh;
}

.form_frame {
  width: 100%;
  max-width: var(--frame-width);
  margin: 0 auto;
  background: var(--color-white);
  overflow-x: hidden;
}

/* ========================================
   Header（LP と同型）
======================================== */
.site_header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  background: var(--color-navy);
}

.form_logo {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.form_logo a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: inherit;
  text-decoration: none;
}

.site_header_label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
}

.site_header_badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1px 6px;
  background: var(--color-white);
  color: var(--color-navy);
}

.site_header_lead {
  color: var(--color-yellow);
}

/* ========================================
   Form body
======================================== */
.form_section {
  padding: 0 16px 24px;
}

.form_section_inner {
  width: 100%;
  max-width: var(--max-width-inner);
  margin: 0 auto;
}

.form_container {
  padding: 16px 0 0;
  background: var(--color-white);
  border-radius: 10px;
}

.form_header {
  margin: 0 0 12px;
  text-align: center;
}

.form_title {
  margin: 0;
  color: var(--color-navy-deep);
  font-size: 16px;
  font-weight: 900;
  line-height: 22px;
  text-align: center;
}

.form_lead {
  margin: 0 0 16px;
  color: var(--color-navy-deep);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
}

.form_body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form_body form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
}

.error_message {
  margin: 0;
  padding: 10px 12px;
  list-style: none;
  background: var(--color-error-bg);
  color: var(--color-error);
  font-size: 12px;
  font-weight: 700;
  border-radius: 6px;
}

.input_wrap {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 0;
  padding: 0;
  border: 0;
}

.form_label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  color: var(--color-navy-deep);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
}

.required {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  background: var(--color-navy-deep);
  border-radius: 3px;
  color: var(--color-yellow);
  font-size: 9px;
  font-weight: 700;
  line-height: 1.2;
}

.input_wrap input[type="text"],
.input_wrap input[type="email"],
.input_wrap input[type="tel"],
.input_wrap textarea {
  width: 100%;
  padding: 12px;
  border: 1.5px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
}

.input_wrap input::placeholder,
.input_wrap textarea::placeholder {
  color: var(--color-placeholder);
}

.input_wrap textarea {
  min-height: 88px;
  resize: vertical;
}

.validation-error {
  display: block;
  margin-top: 4px;
  color: var(--color-error);
  font-size: 11px;
  font-weight: 700;
}

/* ========================================
   参加人数（ボタン式ラジオ）
======================================== */
.participants_btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.participants_btns > div {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
}

.participants_btns input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.participants_btns label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  padding: 10px 8px;
  border: 1.5px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
  color: var(--color-navy-deep);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.participants_btns input[type="radio"]:checked + label {
  border-color: var(--color-navy-deep);
  background: var(--color-yellow);
  color: var(--color-navy-deep);
}

.participants_btns input[type="radio"]:focus-visible + label {
  outline: 2px solid var(--color-navy);
  outline-offset: 2px;
}

/* ========================================
   プライバシー同意
======================================== */
.privacy_agree {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.privacy_agree input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  accent-color: var(--color-navy-deep);
  cursor: pointer;
}

.privacy_agree label {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  color: var(--color-navy-deep);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
}

.privacy_agree label a {
  color: var(--color-link);
  text-decoration: underline;
}

/* ========================================
   Submit
======================================== */
.button_wrap {
  margin: 0;
  text-align: center;
}

.button,
input.button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 12px;
  border: 2px solid var(--color-navy-deep);
  border-radius: 8px;
  background: var(--color-yellow);
  box-shadow: 0 3px 0 0 rgba(26, 36, 89, 0.25);
  color: var(--color-navy-deep);
  font-family: inherit;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

@media (hover: hover) and (pointer: fine) {
  .button:hover,
  input.button:hover {
    transform: translateY(1px);
    box-shadow: 0 2px 0 0 rgba(26, 36, 89, 0.25);
  }
}

.button:active,
input.button:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 0 rgba(26, 36, 89, 0.25);
}

.back_button {
  background: var(--color-white);
  box-shadow: none;
  border-color: var(--color-navy-deep);
  color: var(--color-navy-deep);
}

@media (hover: hover) and (pointer: fine) {
  .back_button:hover {
    background: var(--color-input-bg);
    transform: none;
    box-shadow: none;
  }
}

.back_button:active {
  transform: none;
  box-shadow: none;
  opacity: 0.85;
}

.form_note {
  margin: 0;
  color: var(--color-note);
  font-size: 8px;
  font-weight: 500;
  line-height: 15px;
  text-align: center;
}

/* ========================================
   Confirm
======================================== */
dl.confirm {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  border: 0;
}

.confirm_item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  border: 1.5px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
}

dl.confirm dt,
dl.confirm dd {
  margin: 0;
  padding: 0;
  border: 0;
}

dl.confirm dt {
  color: var(--color-navy-deep);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}

dl.confirm dd {
  color: var(--color-text);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  word-break: break-word;
}

.form_submit_button {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 4px 0 0;
}

/* ========================================
   Complete
======================================== */
.complete_heading {
  margin: 0 0 12px;
  color: var(--color-navy-deep);
  font-size: 15px;
  font-weight: 900;
  line-height: 1.4;
  text-align: center;
}

.complete_txt {
  margin: 0 0 10px;
  color: var(--color-text);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.6;
  text-align: center;
}

.complete_txt--note {
  margin-bottom: 20px;
  color: var(--color-note);
  font-size: 11px;
}

/* ========================================
   Footer（LP と同型）
======================================== */
.site_footer {
  padding: 24px 16px;
  background: var(--color-navy-footer);
}

.site_footer .wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
  width: 100%;
  max-width: var(--max-width-inner);
  margin: 0 auto;
}

.footer_heading {
  margin: 0;
  color: var(--color-white);
  font-size: 12px;
  font-weight: 500;
  line-height: 19px;
}

.footer_dl {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  margin: 0;
  padding: 6px 10px;
  background: var(--color-navy-footer-box);
  color: var(--color-white);
  font-size: 10px;
  font-weight: 300;
  line-height: 17px;
}

.footer_dl div {
  display: flex;
  gap: 0;
}

.footer_dl dt,
.footer_dl dd {
  margin: 0;
}

.footer_dl dt::after {
  content: "：";
}

.footer_privacy {
  margin: 0;
}

.footer_privacy a {
  color: var(--color-link);
  font-size: 10px;
  font-weight: 500;
  text-decoration: underline;
}

.footer_copy {
  margin: 0;
  color: var(--color-copy);
  font-size: 10px;
  font-weight: 500;
}