* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, sans-serif;
    margin: 0;
    padding: 20px;
    font-size: 16px;
    line-height: 1.6;
    color: #2c3e50;
    background-color: #f8f9fa;
    min-height: 100vh;
}
.container {
    max-width: 900px;
    margin: 0 auto;
}
h1 {
    text-align: center;
    margin: 30px 0;
    font-size: 32px;
    font-weight: 600;
    color: #1a1a1a;
}
h1 a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}
h1 a:hover {
    color: #4a5568;
}
h2 {
    font-size: 24px;
    font-weight: 500;
    margin: 20px 0;
    color: #2d3748;
    text-align: center;
}
p {
    margin: 12px 0;
    color: #4a5568;
}
a {
    color: #2c5282;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
hr {
    border: none;
    border-top: 1px solid #e2e8f0;
    margin: 30px 0;
}
.btn,
.back-btn,
.upload-btn,
.regular-button,
button[type="submit"] {
    display: inline-block;
    padding: 12px 24px;
    background: #ffffff;
    border: 1px solid #cbd5e0;
    border-radius: 6px;
    text-decoration: none;
    color: #2d3748;
    font-size: 15px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}
.btn:hover,
.back-btn:hover,
.upload-btn:hover,
.regular-button:hover,
button[type="submit"]:hover {
    background: #f7fafc;
    border-color: #a0aec0;
    text-decoration: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}
.back-btn,
.upload-btn {
    margin: 5px;
}
.main-page {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}
.main-page h1 {
    font-size: 40px;
    margin-bottom: 40px;
}
.main-page p {
    margin: 20px auto;
    max-width: 600px;
    font-size: 15px;
}
.main-page .btn {
    font-size: 16px;
    padding: 14px 32px;
    margin: 8px;
    min-width: 160px;
}
.main-page .disclaimer {
    margin-top: 50px;
    padding: 20px;
    background-color: #edf2f7;
    border-radius: 8px;
    border: 1px solid #cbd5e0;
    font-size: 14px;
    color: #4a5568;
}
.error {
    color: #c53030;
    background-color: #fff5f5;
    padding: 12px 16px;
    border-radius: 6px;
    border: 1px solid #feb2b2;
    margin: 20px 0;
    text-align: center;
}
.quota-info {
    margin: 25px 0;
    padding: 12px 20px;
    font-size: 14px;
    color: #4a5568;
    text-align: center;
    background-color: #edf2f7;
    border-radius: 6px;
    border: 1px solid #cbd5e0;
}
.login-form {
    max-width: 420px;
    margin: 30px auto;
    padding: 30px;
    background-color: #ffffff;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
.login-form input {
    width: 100%;
    padding: 14px 16px;
    margin: 10px 0;
    font-size: 15px;
    border: 1px solid #cbd5e0;
    border-radius: 6px;
    background-color: #ffffff;
    font-family: inherit;
}
.login-form input:focus {
    outline: none;
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}
.login-form button {
    width: 100%;
    margin-top: 10px;
}
form[action="/upload"] {
    margin: 25px 0;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    text-align: center;
}
input[type="file"] {
    padding: 10px;
    margin: 10px;
    border: 1px solid #cbd5e0;
    border-radius: 6px;
    background-color: #ffffff;
    cursor: pointer;
}
.files-list-item,
div[style*="margin: 5px 0"] {
    margin: 12px 0 !important;
    padding: 14px 16px !important;
    display: flex !important;
    align-items: center !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 6px !important;
    background-color: #ffffff !important;
}
.files-list-item:hover,
div[style*="margin: 5px 0"]:hover {
    background-color: #f7fafc !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05) !important;
}
.files-list-item span,
div[style*="margin: 5px 0"] span {
    flex: 1 !important;
    text-align: left !important;
}
.files-list-item a,
div[style*="margin: 5px 0"] a {
    font-weight: 500;
    color: #2c5282;
    word-break: break-all;
}
.files-list-item form,
div[style*="margin: 5px 0"] form {
    display: inline !important;
    margin-left: 10px !important;
}
.files-list-item button,
div[style*="margin: 5px 0"] button {
    padding: 8px 16px !important;
    font-size: 14px !important;
    margin: 0 !important;
}
div[style*="margin: 5px 0"] a:only-child {
    display: block;
    padding: 12px 0px;
    font-weight: 500;
    width: 100%;
}
p a.back-btn {
    display: inline-block;
    margin: 10px 5px;
}

@media (max-width: 768px) {
    body {
        padding: 15px;
        font-size: 15px;
    }
    h1 {
        font-size: 28px;
        margin: 20px 0;
    }
    h2 {
        font-size: 22px;
    }
    .main-page h1 {
        font-size: 32px;
    }
    .btn,
    .back-btn,
    .upload-btn,
    button[type="submit"] {
        padding: 14px 20px;
        font-size: 15px;
    }
    .main-page .btn {
        width: 100%;
        max-width: 300px;
        display: block;
        margin: 10px auto;
    }
    .login-form {
        padding: 25px 20px;
    }
    form[action="/upload"] {
        padding: 15px;
    }
    input[type="file"] {
        width: 100%;
        margin: 10px 0;
    }
    form[action="/upload"] button {
        width: 100%;
        margin-top: 10px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    h1 {
        font-size: 24px;
        margin: 15px 0;
    }
    h2 {
        font-size: 20px;
    }
    .main-page h1 {
        font-size: 28px;
    }
    .main-page p {
        font-size: 14px;
    }
    .btn,
    .back-btn,
    .upload-btn,
    button[type="submit"] {
        padding: 12px 16px;
        font-size: 14px;
    }
    .main-page .btn {
        font-size: 15px;
        padding: 14px 24px;
    }
    .login-form {
        padding: 20px 15px;
    }
    .files-list-item,
    div[style*="margin: 5px 0"] {
        flex-direction: column !important;
        align-items: flex-start !important;
        padding: 12px !important;
    }
    .files-list-item span,
    div[style*="margin: 5px 0"] span {
        margin-bottom: 10px !important;
        width: 100% !important;
    }
    .files-list-item form,
    div[style*="margin: 5px 0"] form {
        width: 100% !important;
        margin-left: 0 !important;
        margin-top: 8px !important;
    }
    .files-list-item button,
    div[style*="margin: 5px 0"] button {
        width: 100% !important;
    }
    p a.back-btn {
        display: block;
        margin: 8px 0;
    }
}