/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Custom Font */
@font-face {
    font-family: "Doto";
    src: url("../fonts/Doto-Black.ttf") format("truetype");
    font-weight: 900;
    font-display: swap;
}

:root {
    color-scheme: dark;
    --primary-color: #ff6699;
    --background: #0d1117;
    --surface: #151b23;
    --text-primary: #edf1f5;
    --text-secondary: #9ca8b5;
    --border: #2a3441;
    --shadow: rgba(0, 0, 0, 0.32);
    --shadow-strong: rgba(0, 0, 0, 0.48);
    --border-radius: 12px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --section-padding: 56px;
    --section-heading-gap: 32px;
    --content-gap: 24px;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
        sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Header and Navigation */
.header {
    background-color: rgba(13, 17, 23, 0.94);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

@media (min-width: 768px) {
    .nav {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
}

.nav-brand h2 {
    font-family:
        "Doto",
        -apple-system,
        BlinkMacSystemFont,
        "SF Pro Display",
        sans-serif;
    font-size: 28px;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-links {
    display: none;
    gap: var(--spacing-md);
}

.mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0;
    margin: -4px;
    border-radius: 50%;
    transition:
        color 0.2s ease,
        transform 0.2s ease;
    position: relative;
    width: 48px;
    height: 48px;
    -webkit-tap-highlight-color: transparent;
}

.mobile-menu-toggle::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: transparent;
    transition: background-color 0.2s ease;
    pointer-events: none;
}

.mobile-menu-toggle:active::before {
    background-color: rgba(255, 102, 153, 0.15);
}

.mobile-menu-toggle:active {
    color: var(--primary-color);
    transform: scale(0.95);
}

.mobile-menu-toggle:focus {
    outline: none;
}

.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--background);
    border-top: 1px solid var(--border);
    padding: var(--spacing-md);
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 10;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex !important;
        flex-direction: row;
        align-items: center;
        position: static;
        background-color: transparent;
        border-top: none;
        padding: 0;
        box-shadow: none;
    }

    .mobile-menu-toggle {
        display: none;
    }
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s ease;
    padding: 12px 16px;
    margin: -8px -12px;
    border-radius: 8px;
    position: relative;
    display: block;
    -webkit-tap-highlight-color: transparent;
}

.nav-links a::before {
    content: "";
    position: absolute;
    top: -6px;
    left: -6px;
    right: -6px;
    bottom: -6px;
    border-radius: 12px;
    background: transparent;
    transition: background-color 0.2s ease;
    pointer-events: none;
}

.nav-links a:active::before {
    background-color: rgba(255, 102, 153, 0.15);
}

.nav-links a:hover {
    color: var(--primary-color);
}

.language-switcher {
    position: relative;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.language-switcher-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

.language-switcher-icon {
    position: absolute;
    left: 10px;
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    pointer-events: none;
    transition: color 0.2s ease;
    z-index: 1;
}

.language-switcher select {
    width: fit-content;
    min-width: 0;
    max-width: 100%;
    field-sizing: content;
    min-height: 36px;
    color: var(--text-primary);
    appearance: none;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 12px 6px 34px;
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition:
        color 0.2s ease,
        background-color 0.2s ease,
        border-color 0.2s ease;
}

.language-switcher select:hover {
    background-color: rgba(255, 102, 153, 0.1);
    border-color: rgba(255, 102, 153, 0.36);
    color: var(--primary-color);
}

.language-switcher:has(select:hover) .language-switcher-icon,
.language-switcher:has(select:focus-visible) .language-switcher-icon {
    color: var(--primary-color);
}

.language-switcher select option {
    color: var(--text-primary);
    background-color: var(--surface);
}

.language-switcher select:focus {
    outline: none;
}

.language-switcher select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Nav Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: inherit;
    font-family: inherit;
    transition: color 0.2s ease;
    padding: 12px 16px;
    margin: -8px -12px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 5px;
    -webkit-tap-highlight-color: transparent;
}

.nav-dropdown-toggle:hover {
    color: var(--primary-color);
}

.nav-dropdown-toggle:focus {
    outline: none;
}

.nav-dropdown-toggle:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.dropdown-arrow {
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.nav-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 16px var(--shadow-strong);
    min-width: 180px;
    overflow: hidden;
}

.nav-dropdown-menu a {
    display: block;
    padding: 10px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.15s ease, background-color 0.15s ease;
    margin: 0;
    border-radius: 0;
    -webkit-tap-highlight-color: transparent;
}

.nav-dropdown-menu a:hover {
    color: var(--primary-color);
    background-color: var(--surface);
}

/* Desktop dropdown: absolute positioned, shown via JS open class */
@media (min-width: 768px) {
    .nav-dropdown-menu {
        position: absolute;
        top: calc(100% + 10px);
        right: 0;
        z-index: 200;
    }

    /* Transparent bridge covers the gap so mouseleave doesn't fire mid-travel */
    .nav-dropdown::after {
        content: "";
        position: absolute;
        top: 100%;
        left: -8px;
        right: -8px;
        height: 10px;
    }

    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
    }
}

/* Mobile dropdown: inline, toggled by click */
@media (max-width: 767px) {
    .nav-dropdown {
        /* Match the nav link negative margins so text aligns to the same left edge */
        margin-top: -8px;
        margin-bottom: -8px;
        margin-left: -12px;
        margin-right: -12px;
    }

    .nav-dropdown-toggle {
        width: 100%;
        margin: 0;
        padding: 12px 16px;
        justify-content: space-between;
        text-align: left;
    }

    .nav-dropdown-menu {
        border: none;
        border-top: 1px solid var(--border);
        border-radius: 0;
        box-shadow: none;
        background-color: transparent;
    }

    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
    }

    .nav-dropdown-menu a {
        padding: 10px 24px;
    }

    .language-switcher {
        justify-content: space-between;
        padding-top: var(--spacing-xs);
    }

    .language-switcher select {
        width: fit-content;
        max-width: 100%;
    }
}


.hero {
    position: relative;
    isolation: isolate;
    text-align: center;
    padding: 56px 0 32px;
    background-color: var(--background);
    overflow: hidden;
}

.hero::before,
.hero::after {
    content: "";
    position: absolute;
    z-index: 0;
    width: min(48vw, 560px);
    aspect-ratio: 1;
    border-radius: 50%;
    will-change: transform;
}

.hero > .container {
    position: relative;
    z-index: 1;
}

.hero::before {
    top: -28%;
    left: -10%;
    background: radial-gradient(
        circle,
        rgba(49, 105, 167, 0.18) 0%,
        rgba(49, 105, 167, 0.08) 38%,
        transparent 72%
    );
    animation: hero-mesh-blue 9s ease-in-out infinite alternate;
}

.hero::after {
    top: -22%;
    right: -8%;
    background: radial-gradient(
        circle,
        rgba(255, 102, 153, 0.12) 0%,
        rgba(255, 102, 153, 0.05) 40%,
        transparent 72%
    );
    animation: hero-mesh-pink 11s ease-in-out infinite alternate;
}

@keyframes hero-mesh-blue {
    to {
        transform: translate3d(38vw, 34%, 0);
    }
}

@keyframes hero-mesh-pink {
    to {
        transform: translate3d(-36vw, 42%, 0);
    }
}

@media (max-width: 768px) {
    .hero::before,
    .hero::after {
        width: min(115vw, 460px);
    }

    .hero::before {
        top: -140px;
        left: -42%;
        animation-name: hero-mesh-blue-mobile;
    }

    .hero::after {
        top: -110px;
        right: -42%;
        animation-name: hero-mesh-pink-mobile;
    }
}

@keyframes hero-mesh-blue-mobile {
    to {
        transform: translate3d(28vw, 18%, 0);
    }
}

@keyframes hero-mesh-pink-mobile {
    to {
        transform: translate3d(-26vw, 28%, 0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .hero::before,
    .hero::after {
        animation: none;
    }
}

.hero-icon {
    width: 120px;
    height: 120px;
    border-radius: 22.37%;
    margin: 0 auto var(--spacing-md);
    display: block;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.android .hero-icon {
    border-radius: 30%;
}

.hero-subtitle {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.3;
    text-align: center;
}

@media (max-width: 768px) {
    .hero-icon {
        width: 100px;
        height: 100px;
        border-radius: 22.37%;
    }

    .android .hero-icon {
        border-radius: 30%;
    }

    .hero-subtitle {
        font-size: 22px;
        max-width: 90%;
    }

    .hero-description {
        max-width: 95%;
        text-align: left;
    }

    .hero-description p {
        font-size: 15px;
        margin: 0;
    }
}

.download-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.download-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.store-badge-link {
    display: inline-block;
    overflow: hidden;
}

.store-badge-link img {
    height: 60px;
    width: auto;
    display: block;
}

.version-label {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 2px;
}

.hero-description {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-description p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
    margin: 0 0 8px 0;
}

.hero-description p:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .hero-description {
        font-size: 16px;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition:
        color 0.2s ease,
        background-color 0.2s ease,
        border-color 0.2s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Device Gallery */
.devices {
    padding: 0;
    background-color: var(--background);
    --device-gallery-max-aspect-ratio: 1.5223;
    --device-gallery-inline-padding: var(--spacing-sm);
    --device-gallery-block-start-padding: var(--spacing-md);
    --device-gallery-block-end-padding: var(--spacing-lg);
}

.device-tabs {
    display: flex;
    width: fit-content;
    margin: var(--spacing-sm) auto 0;
    padding: 4px;
    gap: 4px;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.device-tab {
    min-width: 104px;
    padding: 8px 18px;
    border: 0;
    border-radius: 7px;
    background-color: transparent;
    color: var(--text-secondary);
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition:
        color 0.2s ease,
        background-color 0.2s ease;
}

.device-tab[aria-selected="true"] {
    background-color: rgba(255, 102, 153, 0.12);
    box-shadow: inset 0 0 0 1px rgba(255, 102, 153, 0.28);
    color: var(--primary-color);
}

.device-tab:focus-visible {
    outline-offset: 3px;
}

.device-gallery-viewport {
    overflow-x: auto;
    overflow-y: clip;
    -webkit-overflow-scrolling: touch;
}

.device-gallery {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: var(--content-gap);
    width: max-content;
    min-width: 100%;
    margin: 0 auto;
    padding: var(--device-gallery-block-start-padding)
        var(--device-gallery-inline-padding)
        var(--device-gallery-block-end-padding);
}

.device-gallery[hidden] {
    display: none;
}

.device-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 0 0 auto;
}

.device-image {
    display: block;
    height: 300px;
    width: auto;
    object-fit: contain;
}

.device-item span {
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsive adjustments for device gallery */
@media (min-width: 768px) {
    .devices {
        --device-gallery-inline-padding: clamp(
            var(--spacing-md),
            4vw,
            var(--spacing-xl)
        );
    }
}

@media (max-width: 768px) {
    .device-image {
        height: min(
            300px,
            calc((100vw - 64px) / var(--device-gallery-max-aspect-ratio))
        );
    }
}

@media (max-width: 480px) {
    .device-gallery {
        gap: var(--spacing-md);
    }

    .device-image {
        height: min(
            300px,
            calc((100vw - 48px) / var(--device-gallery-max-aspect-ratio))
        );
    }
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0 0;
}

.features h2 {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--section-heading-gap);
    color: var(--text-primary);
}

.feature {
    margin-bottom: var(--content-gap);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.feature:last-child {
    margin-bottom: 0;
}

.feature h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.features-subtitle {
    max-width: 680px;
    margin: calc(-1 * var(--spacing-sm)) auto var(--spacing-lg);
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    text-align: center;
}

/* Partners Section */
.partners {
    padding: var(--spacing-xl) 0 0;
    text-align: center;
    background-color: var(--background);
}

.partners h2 {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--section-heading-gap);
    color: var(--text-primary);
}

.partners-grid {
    display: flex;
    gap: var(--content-gap);
    justify-content: center;
    max-width: 700px;
    margin: 0 auto;
}

.partner-card {
    flex: 1;
    text-decoration: none;
    background-color: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    transition: border-color 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    color: inherit;
    position: relative;
    overflow: hidden;
}

.partner-logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 6px;
    line-height: 1.1;
}

.partner-tagline {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.partner-card:hover .partner-tagline {
    opacity: 0.9;
}

.partner-description {
    font-size: 13px;
    color: var(--text-secondary);
    font-style: italic;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.partner-card:hover .partner-description {
    opacity: 1;
}

.genki-brand .partner-logo {
    color: #ff4444;
    text-shadow: 0 2px 8px rgba(255, 68, 68, 0.3);
}

.genki-brand .partner-tagline {
    color: var(--text-secondary);
}

.genki-brand:hover {
    border-color: #ff4444;
}

.hagibis-brand .partner-logo {
    color: #0066cc;
    text-shadow: 0 2px 8px rgba(0, 102, 204, 0.3);
}

.hagibis-brand .partner-tagline {
    color: var(--text-secondary);
}

.hagibis-brand:hover {
    border-color: #0066cc;
}

@media (max-width: 768px) {
    .partners-grid {
        flex-direction: column;
        align-items: center;
    }

    .partner-card {
        width: 100%;
        max-width: 320px;
    }

    .partner-logo {
        font-size: 22px;
        letter-spacing: 2px;
    }
}

/* FAQ Section */
.faq {
    padding: var(--spacing-xl) 0 var(--section-padding);
}

.faq h2 {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--section-heading-gap);
    color: var(--text-primary);
}

.faq-grid {
    display: grid;
    gap: var(--spacing-sm);
    max-width: 800px;
    margin: 0 auto;
}

.faq-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.faq-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.faq-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.platform-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 8px;
    border-radius: 20px;
    margin-bottom: var(--spacing-xs);
    background-color: var(--border);
    color: var(--text-secondary);
}

.platform-badge.ios {
    background-color: rgba(0, 122, 255, 0.12);
    color: #007aff;
}

.platform-badge.android {
    background-color: rgba(52, 199, 89, 0.12);
    color: #34c759;
}

/* Footer */
.footer {
    background-color: var(--background);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.copyright {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0;
}

@media (max-width: 768px) {
    .footer {
        padding: var(--spacing-md) 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding: 48px;
        --section-heading-gap: 28px;
        --content-gap: 20px;
    }

    .hero {
        padding: 40px 0 24px;
    }

    .device-tabs {
        margin-top: 12px;
    }

    .devices {
        --device-gallery-block-start-padding: var(--spacing-md);
        --device-gallery-block-end-padding: var(--spacing-sm);
    }

    .store-badge-link img {
        height: 44px;
    }

    .download-buttons {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-items: start;
        gap: var(--spacing-sm) 12px;
        width: min(100%, 360px);
        margin-right: auto;
        margin-left: auto;
    }

    .download-item:first-child {
        grid-column: 1 / -1;
    }

    .version-label {
        font-size: 13px;
        line-height: 1.3;
    }

    .features,
    .partners,
    .faq {
        padding: 40px 0 0;
    }

    .faq {
        padding-bottom: var(--section-padding);
    }

    .features h2,
    .partners h2,
    .faq h2 {
        font-size: 28px;
    }
}

@media (max-width: 340px) {
    .download-buttons {
        grid-template-columns: 1fr;
    }

    .download-item:first-child {
        grid-column: auto;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}