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

    :root {
        --bg: #F5F5F7;
        --surface: #FFFFFF;
        --text-primary: #1D1D1F;
        --text-secondary: #86868B;
        --accent: #007AFF;
        --white: #ffffff;
        --border-color: rgba(29, 29, 31, 0.1);
    }

    :root[data-theme="dark"] {
        --bg: #000000;
        --surface: #1C1C1E;
        --text-primary: #F5F5F7;
        --text-secondary: #86868B;
        --accent: #0A84FF;
        --white: #ffffff;
        --border-color: rgba(245, 245, 247, 0.1);
    }

    body {
        font-family: 'Inter', sans-serif;
        background: var(--bg);
        color: var(--text-primary);
        overflow-x: hidden;
        position: relative;
        transition: background-color 0.3s ease, color 0.3s ease;
    }

    .container {
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 2rem;
        position: relative;
        z-index: 2;
    }

    .content-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        max-width: 1200px;
        width: 100%;
        align-items: center;
    }

    .app-showcase {
        display: flex;
        justify-content: center;
        align-items: center;
        position: relative;
        animation: fadeIn 0.8s ease-out 0.2s both;
        height: 100%;
    }

    .app-showcase::before {
        content: '';
        position: absolute;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(0, 122, 255, 0.05) 0%, transparent 70%);
        border-radius: 50%;
        z-index: -1;
    }

    :root[data-theme="dark"] .app-showcase::before {
        background: radial-gradient(circle, rgba(10, 132, 255, 0.08) 0%, transparent 70%);
    }

    .phone-frame {
        position: relative;
        display: inline-block;
        padding: 10px;
        background: #1D1D1F;
        border-radius: 48px;
        box-shadow:
            0 20px 60px rgba(0, 0, 0, 0.12),
            inset 0 0 0 1px rgba(255, 255, 255, 0.08);
        animation: fadeIn 0.8s ease-out 0.4s both, float 6s ease-in-out infinite 1s;
        transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }

    :root[data-theme="dark"] .phone-frame {
        background: #1C1C1E;
        box-shadow:
            0 20px 60px rgba(0, 0, 0, 0.5),
            inset 0 0 0 1px rgba(255, 255, 255, 0.1);
    }

    /* Volume buttons on left side */
    .phone-frame::before {
        content: '';
        position: absolute;
        left: -4px;
        top: 25%;
        width: 3px;
        height: 32px;
        background: #1D1D1F;
        border-radius: 2px 0 0 2px;
        box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.3);
    }

    :root[data-theme="dark"] .phone-frame::before {
        background: #86868B;
        box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.2);
    }

    /* Power button on right side */
    .phone-frame::after {
        content: '';
        position: absolute;
        right: -4px;
        top: 20%;
        width: 3px;
        height: 40px;
        background: #1D1D1F;
        border-radius: 0 2px 2px 0;
        box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.3);
    }

    :root[data-theme="dark"] .phone-frame::after {
        background: #86868B;
        box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.2);
    }

    .phone-frame:hover {
        transform: translateY(-5px) scale(1.02);
        box-shadow:
            0 30px 80px rgba(0, 122, 255, 0.15),
            inset 0 0 0 1px rgba(255, 255, 255, 0.1);
    }

    :root[data-theme="dark"] .phone-frame:hover {
        box-shadow:
            0 30px 80px rgba(10, 132, 255, 0.2),
            inset 0 0 0 1px rgba(255, 255, 255, 0.15);
    }

    .image-container {
        position: relative;
        width: 100%;
        max-width: 300px;
        display: block;
    }

    .app-demo-img {
        width: 100%;
        max-width: 300px;
        height: auto;
        object-fit: contain;
        border-radius: 38px;
        display: block;
        filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.08));
        transition: filter 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 1s ease-in-out;
        position: absolute;
        top: 0;
        left: 0;
        opacity: 0;
        pointer-events: none;
    }

    .app-demo-img.active {
        opacity: 1;
        position: relative;
        pointer-events: auto;
    }

    :root[data-theme="dark"] .app-demo-img {
        filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.3));
    }

    .phone-frame:hover .app-demo-img {
        filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.12));
    }

    :root[data-theme="dark"] .phone-frame:hover .app-demo-img {
        filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.4));
    }

    .content {
        animation: fadeIn 0.8s ease-out;
    }

    .logo {
        width: 56px;
        height: 56px;
        margin-bottom: 3rem;
        opacity: 0;
        animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
        border-radius: 22%;
        overflow: hidden;
        background: var(--surface);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    :root[data-theme="dark"] .logo {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }

    .logo img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.3s ease;
        display: block;
    }

    .logo:hover img {
        transform: scale(1.1);
    }

    .theme-toggle {
        position: fixed;
        top: 2rem;
        right: 2rem;
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: var(--surface);
        color: var(--text-primary);
        border: 1px solid var(--border-color);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 1000;
        opacity: 0;
        animation: fadeIn 0.6s ease-out 0.9s forwards;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    :root[data-theme="dark"] .theme-toggle {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }

    .theme-toggle:hover {
        transform: scale(1.05);
        background: var(--accent);
        color: var(--white);
        box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
    }

    :root[data-theme="dark"] .theme-toggle:hover {
        box-shadow: 0 4px 12px rgba(10, 132, 255, 0.4);
    }

    .theme-toggle svg {
        width: 24px;
        height: 24px;
        transition: transform 0.3s ease;
    }

    @keyframes fadeIn {
        from {
            opacity: 0
        }

        to {
            opacity: 1
        }
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px)
        }

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

    @keyframes float {

        0%,
        100% {
            transform: translateY(0)
        }

        50% {
            transform: translateY(-10px)
        }
    }

    h1 {
        font-family: 'Bebas Neue', sans-serif;
        font-size: clamp(3.5rem, 6vw, 5rem);
        letter-spacing: 0.05em;
        line-height: 1;
        margin-bottom: 1rem;
        opacity: 0;
        animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
    }

    .subtitle {
        font-size: clamp(1.125rem, 2vw, 1.5rem);
        letter-spacing: 0.02em;
        color: var(--text-secondary);
        margin-bottom: 3rem;
        opacity: 0;
        animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
    }

    .download-buttons {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        margin-bottom: 4rem;
        opacity: 0;
        animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.7s forwards;
    }

    .download-buttons-row {
        display: flex;
        gap: 1rem;
    }

    .download-btn {
        display: inline-block;
        text-decoration: none;
        transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        line-height: 0;
    }

    .download-btn img {
        height: 60px;
        width: auto;
        display: block;
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .download-btn:hover {
        transform: translateY(-3px);
    }

    .download-btn:hover img {
        transform: scale(1.05);
        filter: brightness(1.1);
    }

    :root[data-theme="dark"] .download-btn:hover img {
        filter: brightness(1.15);
    }

    .download-btn.disabled {
        pointer-events: none;
        opacity: 0.5;
        cursor: not-allowed;
    }

    .download-btn.disabled:hover {
        transform: none;
    }

    .download-btn.disabled:hover img {
        transform: none;
        filter: none;
    }

    .coming-soon {
        text-align: center;
        font-size: 0.75rem;
        color: var(--text-secondary);
        margin-top: 0.5rem;
        font-weight: 500;
    }

    .github-source-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.75rem 1.5rem;
        background: var(--surface);
        color: var(--text-primary);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        text-decoration: none;
        font-size: 0.875rem;
        font-weight: 500;
        transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        width: fit-content;
    }

    :root[data-theme="dark"] .github-source-btn {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .github-source-btn svg {
        width: 18px;
        height: 18px;
        transition: transform 0.3s ease;
    }

    .github-source-btn:hover {
        transform: translateY(-2px);
        background: var(--accent);
        color: var(--white);
        border-color: var(--accent);
        box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25);
    }

    :root[data-theme="dark"] .github-source-btn:hover {
        box-shadow: 0 4px 12px rgba(10, 132, 255, 0.35);
    }

    .github-source-btn:hover svg {
        transform: scale(1.1);
    }

    .download-btn-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-note {
        color: var(--text-secondary);
        font-size: 0.875rem;
        opacity: 0;
        animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
    }

    .footer-note a {
        color: var(--accent);
        text-decoration: underline;
        text-underline-offset: 2px;
        transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        font-weight: 500;
    }

    .footer-note a:hover {
        color: var(--accent);
        opacity: 0.8;
    }

    .footer-note a:active {
        opacity: 0.6;
    }

    @media (max-width: 768px) {
        .content-wrapper {
            grid-template-columns: 1fr;
            gap: 1rem;
            text-align: center;
        }

        .app-showcase {
            order: 1
        }

        .content {
            order: 2
        }

        .logo {
            margin: 0 auto 2rem
        }

        .download-buttons {
            gap: 1rem;
            align-items: center;
        }

        .download-buttons-row {
            flex-direction: column;
            gap: 0.75rem;
            align-items: center;
        }

        .download-btn-wrapper {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .download-btn img {
            height: 56px;
        }

        .github-source-btn {
            padding: 0.875rem 1.75rem;
            font-size: 0.9375rem;
        }

        .github-source-btn svg {
            width: 20px;
            height: 20px;
        }

        .image-container {
            max-width: 240px;
        }

        .app-demo-img {
            max-width: 240px;
        }

        .phone-frame {
            padding: 8px;
        }

        .theme-toggle {
            top: 1rem;
            right: 1rem;
            width: 40px;
            height: 40px;
        }

        .theme-toggle svg {
            width: 20px;
            height: 20px;
        }
    }

    @media (max-width: 480px) {
        .container {
            padding: 1.5rem
        }

        h1 {
            font-size: 3rem;
            margin-bottom: 0.75rem
        }

        .subtitle {
            font-size: 1.25rem;
            margin-bottom: 1rem
        }

        .image-container {
            max-width: 200px;
        }

        .app-demo-img {
            max-width: 200px
        }

        .phone-frame {
            padding: 8px;
            border-radius: 36px;
        }

        .app-demo-img {
            border-radius: 28px;
        }

        .logo {
            width: 48px;
            height: 48px
        }

        .download-btn img {
            height: 52px;
        }

        .github-source-btn {
            padding: 0.8125rem 1.5rem;
            font-size: 0.875rem;
        }

        .github-source-btn svg {
            width: 18px;
            height: 18px;
        }
    }

    /* Modal Styles */
    .modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(5px);
        z-index: 2000;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .modal.show {
        display: flex;
        opacity: 1;
    }

    .modal-content {
        background: var(--surface);
        padding: 2rem;
        border-radius: 24px;
        max-width: 400px;
        width: 90%;
        text-align: center;
        position: relative;
        transform: scale(0.9);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
        border: 1px solid var(--border-color);
    }

    :root[data-theme="dark"] .modal-content {
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    }

    .modal.show .modal-content {
        transform: scale(1);
    }

    .close-btn {
        position: absolute;
        top: 1rem;
        right: 1rem;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--text-secondary);
        cursor: pointer;
        padding: 0.5rem;
        line-height: 1;
        transition: color 0.2s ease;
    }

    .close-btn:hover {
        color: var(--text-primary);
    }

    .modal h2 {
        font-family: 'Bebas Neue', sans-serif;
        font-size: 2rem;
        margin-bottom: 1rem;
        color: var(--text-primary);
    }

    .modal p {
        color: var(--text-secondary);
        margin-bottom: 1.5rem;
        line-height: 1.5;
    }

    .apk-download-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        background: var(--accent);
        color: var(--white);
        padding: 1rem 2rem;
        border-radius: 12px;
        text-decoration: none;
        font-weight: 600;
        transition: all 0.3s ease;
        width: 100%;
    }

    .apk-download-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
    }

    :root[data-theme="dark"] .apk-download-btn:hover {
        box-shadow: 0 4px 12px rgba(10, 132, 255, 0.4);
    }

    .apk-download-btn svg {
        width: 20px;
        height: 20px;
    }

    /* Loading Spinner */
    .spinner {
        width: 20px;
        height: 20px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        border-top-color: #fff;
        animation: spin 0.8s linear infinite;
        display: none;
    }

    @keyframes spin {
        to {
            transform: rotate(360deg);
        }
    }

    .apk-download-btn.loading {
        pointer-events: none;
        opacity: 0.9;
    }

    .apk-download-btn.loading .spinner {
        display: block;
    }

    .apk-download-btn.loading svg {
        display: none;
    }

    /* Toast Notification */
    .toast {
        position: fixed;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%) translateY(100px);
        background: rgba(0, 0, 0, 0.8);
        color: white;
        padding: 1rem 2rem;
        border-radius: 50px;
        font-weight: 500;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        backdrop-filter: blur(10px);
        z-index: 3000;
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        display: flex;
        align-items: center;
        gap: 0.75rem;
        white-space: nowrap;
    }

    :root[data-theme="dark"] .toast {
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .toast.show {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }