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

:root {
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        "Hiragino Sans",
        "Yu Gothic",
        "Meiryo",
        sans-serif;
    color: #202124;
    background: #ffffff;
    font-synthesis: none;
}

html,
body {
    margin: 0;
    min-height: 100%;
    background: #ffffff;
}

body {
    min-height: 100vh;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid #e5e7eb;
    backdrop-filter: blur(10px);
}

.app-header__inner {
    min-height: 62px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
}

.app-logo {
    font-size: 20px;
    letter-spacing: 0.01em;
}

.text-button {
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid #d6d9de;
    border-radius: 10px;
    background: #ffffff;
    color: #30343b;
}

.text-button:hover {
    background: #f7f8fa;
}

.app-main {
    max-width: 1440px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}

.welcome-card {
    min-height: 260px;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 8px;
    text-align: center;
    border: 1px solid #e6e8ec;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 8px 30px rgba(20, 30, 55, 0.06);
}

.welcome-card h1,
.welcome-card p {
    margin: 0;
}

.subtle {
    color: #6b7280;
}

.folder-mark {
    width: 64px;
    height: 46px;
    border-radius: 7px;
    background: #f2c94c;
    position: relative;
    margin-bottom: 10px;
}

.folder-mark::before {
    content: "";
    position: absolute;
    width: 28px;
    height: 10px;
    left: 4px;
    top: -7px;
    border-radius: 5px 5px 0 0;
    background: #f2c94c;
}

@media (max-width: 767px) {
    .app-header__inner {
        min-height: 72px;
        padding: 0 16px;
    }

    .app-logo {
        font-size: 24px;
    }

    .text-button {
        min-height: 48px;
        padding: 0 16px;
        font-size: 16px;
    }

    .app-main {
        padding: 20px 14px 60px;
    }

    .welcome-card {
        min-height: 330px;
        border-radius: 18px;
        padding: 28px 18px;
    }

    .welcome-card h1 {
        font-size: 30px;
    }

    .welcome-card p {
        font-size: 18px;
        line-height: 1.65;
    }

    .folder-mark {
        width: 84px;
        height: 60px;
    }

    .folder-mark::before {
        width: 36px;
        height: 13px;
        top: -9px;
    }
}