:root {
    /* Core colors */
    --color-bg: #f9f7f2;
    --color-bg-elevated: #f5f2ea;
    --color-surface: #ffffff;
    --color-text: #2f3a42;
    --color-text-subtle: #5f6b73;
    --color-primary: #2e95a6;
    --color-primary-strong: #226f7c;
    --color-accent: #f49ea2;
    --color-accent-soft: #ffd8d9;
    --color-border: #dce4e7;
    --color-footer: #27343d;
    --color-on-dark: #f7fafc;

    /* Typography */
    --font-sans: 'Poppins', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
    --fs-hero: clamp(2.2rem, 4vw, 3.8rem);
    --fs-h2: clamp(1.7rem, 2.5vw, 2.2rem);
    --fs-body: 1rem;
    --lh-base: 1.7;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;

    /* Radius and shadow */
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-pill: 999px;
    --shadow-1: 0 10px 30px rgba(35, 49, 57, 0.08);
    --shadow-2: 0 18px 40px rgba(35, 49, 57, 0.14);

    /* Legacy aliases for existing styles */
    --primary: var(--color-primary);
    --primary-dark: var(--color-primary-strong);
    --secondary: var(--color-accent);
    --accent: #bde3dc;
    --bg-body: var(--color-bg);
    --bg-surface: var(--color-surface);
    --bg-footer: var(--color-footer);
    --text-main: var(--color-text);
    --text-muted: var(--color-text-subtle);
    --text-on-dark: var(--color-on-dark);
    --shadow-soft: var(--shadow-1);
    --shadow-hover: var(--shadow-2);
    --radius-btn: var(--radius-pill);
}

html {
    scroll-behavior: smooth;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: radial-gradient(circle at top right, #f1f8f9 0%, var(--color-bg) 45%, #f6f3ec 100%);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    line-height: var(--lh-base);
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    color: var(--color-text);
    line-height: 1.3;
}

p {
    margin-top: 0;
}

a,
button {
    transition: all 0.25s ease;
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--color-primary) 65%, white);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

.text-center {
    text-align: center;
}

.px-4 {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    text-decoration: none;
    font-weight: 600;
    padding: 0.85rem 1.65rem;
    border-radius: var(--radius-pill);
    letter-spacing: 0.02em;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-strong) 100%);
    color: #ffffff;
    box-shadow: var(--shadow-1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
}

.btn-secondary {
    color: var(--color-primary-strong);
    background-color: #f0fafb;
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background-color: #e5f4f6;
    transform: translateY(-2px);
}

.section {
    padding: clamp(3.5rem, 8vw, 5.2rem) var(--space-4);
}

.bg-light-gray {
    background-color: var(--color-bg-elevated);
}

.container {
    width: min(1200px, 100%);
    margin: 0 auto;
}

.section-title {
    font-size: var(--fs-h2);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-4);
    letter-spacing: 0.03em;
}

.section-title::after {
    content: '';
    display: block;
    width: 56px;
    height: 4px;
    border-radius: var(--radius-pill);
    margin: var(--space-3) auto 0;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.section-intro {
    max-width: 680px;
    margin: 0 auto var(--space-7);
    text-align: center;
    color: var(--color-text-subtle);
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.apps-vertical-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    max-width: 980px;
    margin: 0 auto;
}

@media (min-width: 700px) {
    .grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1080px) {
    .grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in.is-visible,
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.loader {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid #deeaed;
    border-top-color: var(--color-primary);
    animation: spin 1s linear infinite;
    z-index: 9999;
}

@keyframes spin {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.pop-element {
    animation: pop 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes pop {
    from {
        transform: translateY(12px) scale(0.98);
        opacity: 0;
    }

    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .fade-in,
    .pop-element {
        opacity: 1;
        transform: none;
    }
}

/* Hero Section */
.hero-section {
    position: relative;
    overflow: hidden;
    padding: clamp(4.5rem, 10vw, 7rem) 1rem clamp(3.5rem, 8vw, 5rem);
}

.hero-section::before,
.hero-section::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(2px);
    z-index: -1;
}

.hero-section::before {
    top: -120px;
    right: -120px;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(46, 149, 166, 0.18) 0%, rgba(46, 149, 166, 0) 70%);
}

.hero-section::after {
    bottom: -140px;
    left: -80px;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(244, 158, 162, 0.22) 0%, rgba(244, 158, 162, 0) 72%);
}

.hero-layout {
    display: flex;
    justify-content: center;
}

.hero-copy {
    max-width: 560px;
    text-align: center;
}

.hero-title {
    font-size: var(--fs-hero);
    font-weight: 700;
    margin-bottom: 1.4rem;
    letter-spacing: 0.04em;
}

.hero-subtitle {
    color: var(--color-text-subtle);
    font-size: clamp(1rem, 1.7vw, 1.2rem);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

@media (max-width: 700px) {
    .hero-actions {
        width: 100%;
    }

    .hero-actions .btn-primary,
    .hero-actions .btn-secondary {
        flex: 1 1 auto;
        min-width: 0;
    }
}

/* Cards */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-1);
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    transition-delay: var(--delay, 0s);
}

.app-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: stretch;
    gap: var(--space-4);
}

.app-row-main {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    align-items: center;
    gap: var(--space-4);
}

.app-row-image-wrap {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: transparent;
}

.app-row-image {
    width: 100%;
    display: block;
    margin-bottom: 0;
    height: 100%;
    object-fit: cover;
    padding: 0;
    background: transparent;
}

.app-row-body {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.app-row-body .card-text {
    margin-bottom: 0.9rem;
}

.app-preview-link {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, #f9fbfc 0%, #f2f7f8 100%);
    padding: 0.75rem;
    gap: 0.55rem;
}

.app-preview-link:hover,
.app-preview-link:focus-visible {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--color-primary) 35%, var(--color-border));
    box-shadow: 0 10px 24px rgba(35, 49, 57, 0.12);
}

.app-preview-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-radius: 12px;
    background: #edf4f6;
}

.app-preview-label {
    color: var(--color-primary-strong);
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.card:hover,
.card:focus-within {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-2);
    border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border));
}

.card-img,
.sticker-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    border-radius: var(--radius-md);
    display: block;
    margin-bottom: 1.1rem;
    background: #f5f8f9;
}

.sticker-img {
    aspect-ratio: 1 / 1;
    background: transparent;
}

#stickers .card {
    max-width: 340px;
    min-width: min(340px, 82vw);
    flex: 0 0 auto;
    padding: 1rem;
    scroll-snap-align: start;
}

.stickers-carousel {
    position: relative;
    padding: 0 2.6rem;
}

#stickers .grid {
    display: flex;
    gap: var(--space-3);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    padding-bottom: var(--space-2);
}

#stickers .grid::-webkit-scrollbar {
    display: none;
}

.stickers-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: #ffffff;
    color: var(--color-primary-strong);
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(35, 49, 57, 0.14);
}

.stickers-nav:hover,
.stickers-nav:focus-visible {
    transform: translateY(-50%) scale(1.03);
    background: #f6fbfc;
}

.stickers-nav:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.stickers-nav-prev {
    left: 0;
}

.stickers-nav-next {
    right: 0;
}

.stickers-indicator {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.85rem;
}

#stickersIndicator {
    display: none;
}

.stickers-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #cad7db;
}

.stickers-dot.is-active {
    background: var(--color-primary);
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.7rem;
}

.card-text {
    color: var(--color-text-subtle);
    margin-bottom: 1.2rem;
    font-size: 0.96rem;
    flex-grow: 1;
}

.link-primary {
    width: fit-content;
    color: var(--color-primary-strong);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.92rem;
    border-bottom: 2px solid transparent;
    padding-bottom: 0.1rem;
}

.link-primary:hover,
.link-primary:focus-visible {
    color: var(--color-primary);
    border-bottom-color: var(--color-accent);
}

.app-store-link {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    min-height: 44px;
    margin-top: 0.15rem;
    border-radius: 10px;
}

.app-store-badge {
    width: 152px;
    height: auto;
    display: block;
}

.app-store-link:hover,
.app-store-link:focus-visible {
    transform: translateY(-1px);
}

@media (max-width: 920px) {
    .app-row {
        grid-template-columns: 1fr;
    }

    .app-preview-link {
        flex-direction: row;
        align-items: center;
    }

    .app-preview-img {
        width: 180px;
    }
}

@media (max-width: 640px) {
    .app-row-main {
        grid-template-columns: 1fr;
    }

    .app-row-image {
        max-height: none;
        aspect-ratio: 1 / 1;
        object-fit: contain;
    }

    .app-preview-link {
        flex-direction: column;
        align-items: flex-start;
    }

    .app-preview-img {
        width: 100%;
    }
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.24rem 0.62rem;
    border-radius: var(--radius-pill);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    line-height: 1;
}

.new-badge {
    color: #67232a;
    background-color: var(--color-accent-soft);
}

.update-badge {
    color: #184048;
    background-color: #d5edf0;
}

/* Footer */
.footer {
    padding: 3.4rem 1rem 2.2rem;
    background: linear-gradient(180deg, #314651 0%, var(--color-footer) 100%);
    color: var(--color-on-dark);
}

.footer-inner {
    display: grid;
    gap: 1.35rem;
    justify-items: center;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.profile-image {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.profile-name {
    margin: 0;
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--color-on-dark);
    text-align: left;
}

.profile-copy {
    margin: 0.24rem 0 0;
    color: rgba(245, 250, 252, 0.76);
    font-size: 0.92rem;
    text-align: left;
}

.footer-links {
    display: flex;
    gap: 1.1rem;
}

.footer-links a {
    color: var(--color-on-dark);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    padding-bottom: 0.12rem;
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: #ffffff;
    border-bottom-color: var(--color-accent-soft);
}

.profile-contact-icons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.profile-contact-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
}

.social-icon {
    height: 24px;
    width: auto;
    opacity: 0.9;
    filter: brightness(0) invert(1);
}

.profile-contact-icons a:hover .social-icon,
.profile-contact-icons a:focus-visible .social-icon {
    opacity: 1;
    transform: translateY(-1px);
}

.footer-text {
    margin: 0.2rem 0 0;
    font-size: 0.83rem;
    color: rgba(245, 250, 252, 0.65);
}

@media (max-width: 640px) {
    .footer-brand {
        flex-direction: column;
    }

    .profile-name,
    .profile-copy {
        text-align: center;
    }
}

@media (max-width: 700px) {
    .btn-primary,
    .btn-secondary,
    .link-primary,
    .footer-links a,
    .app-preview-link,
    .app-store-link {
        min-height: 44px;
    }

    .link-primary,
    .footer-links a {
        display: inline-flex;
        align-items: center;
    }
}

@media (max-width: 640px) {
    .app-store-badge {
        width: 168px;
    }

    .stickers-carousel {
        padding: 0 1.9rem;
    }

    .stickers-nav {
        width: 40px;
        height: 40px;
        font-size: 0.96rem;
    }
}

/* Privacy Policy */
.privacy-container {
    max-width: 820px;
}

.privacy-policy-page h2 {
    font-size: 1.25rem;
    margin-top: 2.2rem;
    margin-bottom: 0.9rem;
    color: var(--color-primary-strong);
    font-weight: 700;
}

.privacy-policy-page p {
    margin-bottom: 1rem;
    color: var(--color-text);
}

.privacy-policy-page a:not(.btn-back) {
    color: var(--color-primary-strong);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 65%, white);
    font-weight: 600;
}

.privacy-policy-page a:not(.btn-back):hover,
.privacy-policy-page a:not(.btn-back):focus-visible {
    color: var(--color-primary);
    border-bottom-color: var(--color-accent);
}

.policy-footer {
    padding: 0 1rem 2.2rem;
}

.policy-footer-inner {
    display: grid;
    gap: 1rem;
    justify-items: center;
}

.policy-footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 210px;
    padding: 0.72rem 1.3rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    background: #eef6f7;
    border: 1px solid var(--color-border);
    color: var(--color-primary-strong);
    font-weight: 600;
}

.btn-back:hover,
.btn-back:focus-visible {
    background: #e2f0f2;
    transform: translateY(-2px);
}

.policy-footer-text {
    margin: 0;
    color: var(--color-text-subtle);
    font-size: 0.86rem;
}