/* ====================
   CSS Reset (destyle.css の主要部分)
   ==================== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-size: inherit;
    font-weight: inherit;
}

p {
    margin: 0;
}

ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

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

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

button {
    margin: 0;
    padding: 0;
    border: none;
    background: none;
    font: inherit;
    cursor: pointer;
}

/* ====================
   CSS Variables
   ==================== */
:root {
    --body-text: #333333;
    --body-font-family: 'ヒラギノ角ゴ Pro W3', 'Hiragino Kaku Gothic Pro', 'メイリオ', Meiryo, Osaka, 'MS Pゴシック', 'MS PGothic', sans-serif;
    --body-font-size: 15px;
    --body-link: #0f3284;
    --primary-color: #0f3284;
    --background-light: #f3f3f3;
    --background-section: #e6eaf2;
    --white: #ffffff;
}

/* ====================
   Base Styles
   ==================== */
html,
body {
    font-family: var(--body-font-family);
    font-size: var(--body-font-size);
    color: var(--body-text);
    line-height: normal;
}

a {
    color: var(--body-link);
}

a:hover {
    text-decoration: underline;
}

/* ====================
   Layout
   ==================== */
.root {
    background: var(--background-light);
}

.content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* ====================
   Introduction Heading
   ==================== */
.introduction-heading {
    color: var(--primary-color);
    text-align: center;
    font-size: 30px;
    margin: 0 16px 24px 16px;
}

@media screen and (max-width: 767px) {
    .introduction-heading {
        font-size: 18px;
    }
}

/* ====================
   Global Header
   ==================== */
.global-header {
    display: flex;
    flex-direction: row;
    align-items: center;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 102px;
    padding: 21px 42px;
    z-index: 20;
}

.global-header__logo {
    width: 38px;
    height: 58px;
}

.global-header__logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.global-header__spacer {
    flex-grow: 1;
}

/* ====================
   App Links
   ==================== */
.app-links {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 21px;
    gap: 16px;
}

.app-links a {
    -webkit-tap-highlight-color: transparent;
}

.app-links__button {
    height: 56px;
    width: auto;
    cursor: pointer;
}

@media screen and (max-width: 767px) {
    .app-links__button {
        height: 36px;
    }
}

/* ====================
   Register Form
   ==================== */
.register-form {
    background: rgba(255, 255, 255, 0.9);
    max-width: 520px;
    padding: 21px;
    border-radius: 12px;
    text-align: center;
    margin: 0 auto;
    position: relative;
    border: 1px solid #ddd;
}

@media screen and (max-width: 767px) {
    .register-form {
        box-sizing: border-box;
    }
}

.register-form__logo {
    max-width: 100%;
    height: auto;
}

.register-form__heading {
    font-size: 20px;
    margin: 10px 0 21px;
    color: #444;
    line-height: 26px;
    font-weight: normal;
}

@media screen and (max-width: 767px) {
    .register-form__heading {
        font-size: 16px;
        line-height: 21px;
    }
}

/* ====================
   Register Section (Hero)
   ==================== */
.register-section {
    height: 100vh;
    background: url('./assets/home/HP_pc.png') no-repeat 50% 50% #eee;
    background-size: cover;
    z-index: 6;
    padding: 0;
    position: relative;
}

@media (max-width: 79.9vh) {
    .register-section {
        background: url('./assets/home/HP_phone.png') no-repeat 50% 50% #eee;
        background-size: auto 100%;
    }
}

.register-section__container {
    background: rgba(255, 255, 255, 0.3);
    width: 100%;
    height: 100%;
    padding: 69px 48px 48px 48px;
    display: flex;
    align-items: center;
    position: relative;
}

@media screen and (max-width: 767px) {
    .register-section__container {
        padding: 18px;
    }
}

.register-section__form-wrapper {
    margin: 0 auto;
    transition: 0.5s ease-out;
    transform: translate3d(0, -36px, 0);
    opacity: 0;
}

.register-section__form-wrapper.animate {
    transform: none;
    opacity: 1;
}

.register-section__scroll-button-container {
    position: absolute;
    bottom: 39px;
    text-align: center;
    left: 0;
    right: 0;
}

.register-section__scroll-button {
    background: #ddd;
    color: #666;
    padding: 12px 21px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    transition: 0.1s linear;
    display: inline-block;
    -webkit-tap-highlight-color: transparent;
}

.register-section__scroll-button:hover {
    background: #e6e6e6;
    color: #999;
    text-decoration: none;
}

/* ====================
   Features Section
   ==================== */
.features-section {
    background: var(--background-section);
    z-index: 5;
    border-top: 1px solid #ddd;
    padding: 48px 0;
}

@media screen and (max-width: 767px) {
    .features-section {
        padding: 10px 0;
    }
}

/* ====================
   Carousel (CSS Only with Radio Buttons)
   ==================== */
.carousel {
    text-align: center;
    position: relative;
}

/* Hide radio inputs visually but keep them accessible for screen readers */
.carousel__radio {
    position: fixed;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0); /* Legacy fallback for older browsers */
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.carousel__slides {
    position: relative;
    overflow: hidden;
}

/* Mobile: fixed height container with all slides absolute positioned */
@media screen and (max-width: 767px) {
    .carousel__slides {
        /* Fixed height to accommodate all text content without clipping */
        min-height: calc(100vw * 0.52 + 230px);
    }
}

/* Fine-tune for smaller screens where text wraps more */
@media screen and (max-width: 500px) {
    .carousel__slides {
        min-height: calc(100vw * 0.52 + 235px);
    }
}

@media screen and (max-width: 374px) {
    .carousel__slides {
        min-height: calc(100vw * 0.52 + 260px);
    }
}

/* Stack slides on top of each other for fade effect */
.carousel__slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

/* First slide visible by default to set container height */
.carousel__slide:first-child {
    position: relative;
    opacity: 1;
    visibility: visible;
}

/* Mobile: all slides absolute positioned */
@media screen and (max-width: 767px) {
    .carousel__slide:first-child {
        position: absolute;
    }
}

/* Hide first slide when other slides are selected */
#carousel-1:checked ~ .carousel__slides .carousel__slide:first-child,
#carousel-2:checked ~ .carousel__slides .carousel__slide:first-child,
#carousel-3:checked ~ .carousel__slides .carousel__slide:first-child {
    position: absolute;
    opacity: 0;
    visibility: hidden;
}

/* CSS-only slide visibility control via :checked + sibling selectors */
#carousel-0:checked ~ .carousel__slides .carousel__slide:nth-child(1),
#carousel-1:checked ~ .carousel__slides .carousel__slide:nth-child(2),
#carousel-2:checked ~ .carousel__slides .carousel__slide:nth-child(3),
#carousel-3:checked ~ .carousel__slides .carousel__slide:nth-child(4) {
    position: relative;
    opacity: 1;
    visibility: visible;
}

/* Mobile: keep absolute positioning even when active */
@media screen and (max-width: 767px) {
    #carousel-0:checked ~ .carousel__slides .carousel__slide:nth-child(1),
    #carousel-1:checked ~ .carousel__slides .carousel__slide:nth-child(2),
    #carousel-2:checked ~ .carousel__slides .carousel__slide:nth-child(3),
    #carousel-3:checked ~ .carousel__slides .carousel__slide:nth-child(4) {
        position: absolute;
    }
}

/* CSS-only thumb active state via :checked + sibling selectors */
#carousel-0:checked ~ .carousel__thumbs .carousel__thumb:nth-child(1),
#carousel-1:checked ~ .carousel__thumbs .carousel__thumb:nth-child(2),
#carousel-2:checked ~ .carousel__thumbs .carousel__thumb:nth-child(3),
#carousel-3:checked ~ .carousel__thumbs .carousel__thumb:nth-child(4) {
    opacity: 1;
    background: white;
}

.carousel__page {
    display: flex;
    align-items: center;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 21px;
}

@media screen and (max-width: 767px) {
    .carousel__page {
        flex-direction: column;
    }
}

.carousel__feature-image {
    display: block;
    height: 480px;
    width: auto;
}

.carousel__feature-image--desktop {
    display: block;
}

.carousel__feature-image--mobile {
    display: none;
}

@media screen and (max-width: 767px) {
    .carousel__feature-image--desktop {
        display: none;
    }
    
    .carousel__feature-image--mobile {
        display: block;
        width: 100%;
        height: auto;
    }
}

.carousel__feature-details {
    flex: 1;
    margin-left: 42px;
    padding: 21px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

@media screen and (max-width: 767px) {
    .carousel__feature-details {
        padding: 16px 0 16px 0;
        margin: 12px 0 0 0;
        border-top: none;
    }
}

.carousel__feature-title {
    font-size: 24px;
    margin-bottom: 21px;
    height: 21px;
    color: #a5a5a5;
    text-align: start;
}

@media screen and (max-width: 767px) {
    .carousel__feature-title {
        font-size: 18px;
        margin-bottom: 0;
    }
}

.carousel__feature-body {
    padding: 0;
    color: #444;
    font-size: 20px;
    line-height: 1.5;
    font-weight: 300;
    margin-top: 24px;
    text-align: justify;
}

@media screen and (max-width: 767px) {
    .carousel__feature-body {
        margin-top: 6px;
        font-size: 14px;
    }
}

/* Carousel Thumbs */
.carousel__thumbs {
    display: flex;
    justify-content: center;
    margin: 48px 0 0 0;
    gap: 16px;
}

@media screen and (max-width: 767px) {
    .carousel__thumbs {
        margin: 0 8px 0 8px;
        gap: 0px;
    }
}

.carousel__thumb {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.3;
    transition: opacity 0.2s linear, background 0.2s linear;
    text-align: center;
    font-size: 12px;
    width: 110px;
    padding: 12px;
    border-radius: 100px;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.carousel__thumb:hover {
    opacity: 0.6;
}

.carousel__thumb-image {
    display: block;
    width: auto;
    height: 24px;
    margin: 0 auto;
    padding: 0 12px;
}

.carousel__thumb-caption {
    width: 100%;
    color: var(--primary-color);
    text-align: center;
    padding-top: 4px;
}

/* ====================
   Personalization Section
   ==================== */
.personalization-section {
    background: #fcfcfc;
    overflow: hidden;
    padding: 48px 0 0;
    position: relative;
}

@media screen and (max-width: 767px) {
    .personalization-section {
        padding: 18px 0 0;
    }
}

/* Mobile Stamp Box */
.personalization-section__mobile-stamp-box {
    max-width: 960px;
    margin: 0 auto;
    display: none;
}

@media screen and (max-width: 767px) {
    .personalization-section__mobile-stamp-box {
        display: flex;
    }
}

.personalization-section__mobile-stamp-item {
    flex: 1;
    text-align: center;
}

.personalization-section__mobile-stamp-image {
    height: 70px;
    width: auto;
    transform: scale(0);
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.personalization-section__mobile-stamp-image.animate.display1 {
    transform: none;
}

.personalization-section__mobile-stamp-image.animate.display2 {
    transform: none;
    transition-delay: 0.1s;
}

.personalization-section__mobile-stamp-image.animate.display3 {
    transform: none;
    transition-delay: 0.2s;
}

.personalization-section__mobile-stamp-image.animate.display4 {
    transform: none;
    transition-delay: 0.3s;
}

/* Theme Box */
.personalization-section__theme-box {
    background: #fcfcfc;
    z-index: 4;
    position: relative;
    height: 400px;
}

@media screen and (max-width: 767px) {
    .personalization-section__theme-box {
        height: 180px;
    }
}

.personalization-section__theme-images-wrapper {
    width: 433px;
    margin: 0 auto;
}

@media screen and (max-width: 767px) {
    .personalization-section__theme-images-wrapper {
        width: 217px;
    }
}

.personalization-section__theme-image {
    width: 433px;
    height: 889px;
    display: block;
    position: absolute;
    bottom: -530px;
    z-index: 10;
    transform: translate3d(-60px, 15px, 0) rotate(-30deg);
}

.personalization-section__theme-image.animate.rotate1 {
    transform: rotate(0deg);
    transition: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.personalization-section__theme-image.animate.rotate2 {
    transform: translate3d(60px, 0, 0) rotate(30deg);
    transition: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@media screen and (max-width: 767px) {
    .personalization-section__theme-image {
        width: 217px;
        height: 444px;
        bottom: -292px;
    }
}

/* Desktop Stamp Box */
.personalization-section__stamp-box {
    z-index: 0;
    position: relative;
    bottom: 100px;
    height: 0;
    overflow: visible;
}

@media screen and (max-width: 767px) {
    .personalization-section__stamp-box {
        display: none;
    }
}

.personalization-section__stamp-image {
    position: absolute;
    top: 0;
    opacity: 0;
    object-fit: contain;
    transition: 0.4s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.personalization-section__stamp-image.stamp-left {
    left: 0;
}

.personalization-section__stamp-image.stamp-right {
    right: 0;
}

/* Stamp positions and animations */
.personalization-section__stamp-image:nth-of-type(1) {
    width: 66px;
    height: 68px;
    transform: translate3d(169px, 68px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(1).animate {
    transform: translate3d(169px, 68px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0s;
}

.personalization-section__stamp-image:nth-of-type(2) {
    width: 50px;
    height: 50px;
    transform: translate3d(-81px, 356px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(2).animate {
    transform: translate3d(-81px, 356px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.03s;
}

.personalization-section__stamp-image:nth-of-type(3) {
    width: 79px;
    height: 95px;
    transform: translate3d(131px, 232px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(3).animate {
    transform: translate3d(131px, 232px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.06s;
}

.personalization-section__stamp-image:nth-of-type(4) {
    width: 27px;
    height: 29px;
    transform: translate3d(246px, 289px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(4).animate {
    transform: translate3d(246px, 289px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.09s;
}

.personalization-section__stamp-image:nth-of-type(5) {
    width: 65px;
    height: 63px;
    transform: translate3d(-29px, 264px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(5).animate {
    transform: translate3d(-29px, 264px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.12s;
}

.personalization-section__stamp-image:nth-of-type(6) {
    width: 126px;
    height: 130px;
    transform: translate3d(-20px, 68px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(6).animate {
    transform: translate3d(-20px, 68px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.15s;
}

.personalization-section__stamp-image:nth-of-type(7) {
    width: 65px;
    height: 64px;
    transform: translate3d(204px, 368px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(7).animate {
    transform: translate3d(204px, 368px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.18s;
}

.personalization-section__stamp-image:nth-of-type(8) {
    width: 60px;
    height: 75px;
    transform: translate3d(249px, 161px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(8).animate {
    transform: translate3d(249px, 161px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.21s;
}

.personalization-section__stamp-image:nth-of-type(9) {
    width: 86px;
    height: 85px;
    transform: translate3d(-259px, 137px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(9).animate {
    transform: translate3d(-259px, 137px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.24s;
}

.personalization-section__stamp-image:nth-of-type(10) {
    width: 145px;
    height: 160px;
    transform: translate3d(-165px, 292px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(10).animate {
    transform: translate3d(-165px, 292px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.27s;
}

.personalization-section__stamp-image:nth-of-type(11) {
    width: 138px;
    height: 136px;
    transform: translate3d(19px, 130px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(11).animate {
    transform: translate3d(19px, 130px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.30s;
}

.personalization-section__stamp-image:nth-of-type(12) {
    width: 101px;
    height: 102px;
    transform: translate3d(29px, 360px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(12).animate {
    transform: translate3d(29px, 360px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.33s;
}

.personalization-section__stamp-image:nth-of-type(13) {
    width: 63px;
    height: 62px;
    transform: translate3d(-131px, 226px, 0px) scale(0);
}
.personalization-section__stamp-image:nth-of-type(13).animate {
    transform: translate3d(-131px, 226px, 0px) scale(1);
    opacity: 1;
    transition-delay: 0.36s;
}

/* Theme Box Footer */
.personalization-section__theme-box-footer {
    color: #444;
    background: var(--background-light);
    border-top: 1px solid #eee;
    font-size: 20px;
    line-height: 1.5;
    font-weight: 300;
    margin-top: 24px;
    padding: 21px;
    flex: 1;
    position: relative;
    z-index: 10;
}

@media screen and (max-width: 767px) {
    .personalization-section__theme-box-footer {
        font-size: 16px;
    }
}

.personalization-section__theme-box-caption {
    max-width: 880px;
    margin: 0 auto;
}

/* ====================
   Miscellaneous Sections
   ==================== */
.miscellaneous-sections {
    display: flex;
}

@media screen and (max-width: 1280px) {
    .miscellaneous-sections {
        display: block;
    }
}

/* ====================
   Plan Section
   ==================== */
.plan-section {
    width: 100%;
    padding: 48px;
    background: var(--background-section);
    border-top: 2px solid #fafafa;
    z-index: 2;
    text-align: center;
}

@media screen and (max-width: 1280px) {
    .plan-section {
        background: #eee;
        padding: 18px;
    }
}

.plan-section__image {
    max-width: 100%;
    height: auto;
}

@media screen and (max-width: 767px) {
    .plan-section__image {
        height: 120px;
        width: 69px;
    }
}

.plan-section__caption {
    color: #444;
    font-size: 20px;
    line-height: 30px;
    padding: 21px;
    max-width: 880px;
    margin: 0 auto;
    text-align: start;
}

@media screen and (max-width: 767px) {
    .plan-section__caption {
        font-size: 16px;
        padding: 21px 0;
    }
}

.plan-section__button {
    display: inline-block;
    color: var(--primary-color);
    background: white;
    text-decoration: none;
    height: 41px;
    font-size: 17px;
    line-height: 41px;
    padding: 0 21px;
    border-radius: 4px;
    border: 1px solid var(--primary-color);
    transition: 0.1s ease-out;
    margin-top: 21px;
    -webkit-tap-highlight-color: transparent;
}

.plan-section__button:hover {
    background: var(--primary-color);
    color: white;
    text-decoration: none;
}

/* ====================
   Foot Register Section
   ==================== */
.foot-register-section {
    background: #fcfcfc;
    padding: 48px;
}

@media screen and (max-width: 767px) {
    .foot-register-section {
        padding: 18px;
    }
}

.foot-register-section__container {
    background: rgba(255, 255, 255, 0.3);
    padding: 0 0 48px 0;
    display: flex;
    align-items: center;
}

.foot-register-section__form-wrapper {
    margin: 0 auto;
    transition: 0.5s ease-out;
    transform: translate3d(0, -36px, 0);
    opacity: 0;
}

.foot-register-section__form-wrapper.animate {
    transform: none;
    opacity: 1;
}

/* ====================
   Global Footer
   ==================== */
.global-footer {
    background: #fafafa;
    border-top: 1px solid #eee;
    padding: 21px;
    display: flex;
    font-size: 14px;
}

.global-footer__nav {
    flex-shrink: 1;
    flex-grow: 1;
}

.global-footer__nav-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    align-content: flex-start;
}

.global-footer__nav-item {
    margin-right: 16px;
    margin-bottom: 4px;
}

.global-footer__nav-link {
    color: #999;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
}

.global-footer__nav-link:hover {
    text-decoration: underline;
}

.global-footer__sns-list {
    display: flex;
    place-content: flex-end;
    flex-shrink: 0.5;
}

.global-footer__sns-item {
    cursor: pointer;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

.global-footer__sns-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #999;
}

.global-footer__sns-link:hover {
    text-decoration: none;
}

.global-footer__sns-image {
    height: 24px;
    width: auto;
}

.global-footer__sns-text {
    white-space: nowrap;
}