:root {
    color-scheme: light;
    font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
    color: #172033;
    background: #eef2f7;
}

* {
    box-sizing: border-box;
}

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

body {
    background: linear-gradient(135deg, #edf3fb 0%, #f8fafc 55%, #e8eef8 100%);
}

h1,
h2,
p {
    margin-top: 0;
}

a {
    color: #2459c4;
}

.center-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.card {
    width: min(620px, 100%);
    padding: 32px;
    border: 1px solid rgba(138, 154, 181, 0.25);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 22px 55px rgba(31, 49, 83, 0.14);
}

.compact-card {
    width: min(430px, 100%);
}

.card-header,
.viewer-header,
.status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.muted,
small {
    color: #667085;
}

.form-stack {
    display: grid;
    gap: 14px;
    margin-top: 24px;
}

label {
    font-weight: 650;
}

input[type="password"],
input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    background: white;
    font: inherit;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 18px;
    border: 0;
    border-radius: 10px;
    color: white;
    background: #2459c4;
    font: inherit;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.button:hover {
    background: #1949a7;
}

.button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.button.secondary {
    background: #e9effc;
    color: #1d4fb5;
}

.text-button {
    padding: 6px;
    border: 0;
    color: #526078;
    background: transparent;
    cursor: pointer;
}

.notice {
    margin: 18px 0;
    padding: 12px 14px;
    border-radius: 10px;
    background: #edf2f7;
}

.notice.success {
    color: #17633a;
    background: #dcfce7;
}

.notice.error,
.notice.warning {
    color: #8a3518;
    background: #fff1dc;
}

.status-row {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid #e5eaf2;
    color: #526078;
}

.viewer-page {
    height: 100vh;
    display: grid;
    grid-template-rows: auto 1fr auto;
    padding: 16px;
    gap: 14px;
}

.viewer-header {
    min-height: 58px;
    padding: 0 6px;
}

.viewer-header h1 {
    margin: 0;
    font-size: clamp(20px, 3vw, 28px);
}

.pdf-viewer {
    width: 100%;
    height: 100%;
    border: 1px solid #d4dce8;
    border-radius: 14px;
    background: #525659;
    box-shadow: 0 16px 40px rgba(31, 49, 83, 0.16);
}

.viewer-credit {
    margin: 0;
    color: #667085;
    font-size: 13px;
    text-align: center;
}

.empty-state {
    align-self: center;
    justify-self: center;
    padding: 40px;
    text-align: center;
}

@media (max-width: 600px) {
    .card {
        padding: 24px 20px;
    }

    .card-header,
    .status-row {
        align-items: flex-start;
    }

    .viewer-page {
        padding: 10px;
    }
}