:root {
    color-scheme: light;
    --bg: #f4f6fb;
    --panel: #ffffff;
    --primary: #1b5cff;
    --primary-dark: #184ed6;
    --text: #1c2430;
    --muted: #5f6b7a;
    --border: #dbe1ea;
    --success: #1b9a59;
    --danger: #d64545;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

header {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header h1 {
    font-size: 1.4rem;
    font-weight: 600;
}

nav a {
    margin-left: 16px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
}

.container {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 20px;
}

.hero {
    background: linear-gradient(120deg, #1b5cff 0%, #6a8dff 100%);
    border-radius: 20px;
    padding: 48px;
    color: #fff;
    display: grid;
    gap: 20px;
}

.hero h2 {
    font-size: 2.4rem;
}

.hero p {
    font-size: 1.1rem;
    max-width: 680px;
}

.hero .actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.button {
    background: var(--primary);
    color: #fff;
    padding: 12px 22px;
    border-radius: 10px;
    border: none;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
}

.button.secondary {
    background: #ffffff;
    color: var(--primary);
}

.section {
    margin-top: 32px;
    display: grid;
    gap: 20px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 20px rgba(28, 36, 48, 0.05);
}

.form-panel {
    background: var(--panel);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 10px 20px rgba(28, 36, 48, 0.08);
    max-width: 520px;
    margin: 40px auto;
}

form {
    display: grid;
    gap: 14px;
}

label {
    font-weight: 600;
}

input[type='text'],
input[type='password'],
input[type='file'] {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
}

.notice {
    padding: 12px 14px;
    border-radius: 10px;
    font-weight: 600;
}

.notice.error {
    background: #ffe7e7;
    color: #9f2b2b;
}

.notice.success {
    background: #e3f7ec;
    color: #1b6d45;
}

.dashboard {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 20px;
}

.sidebar {
    background: var(--panel);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--border);
    height: fit-content;
}

.file-list {
    background: var(--panel);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--border);
}

.file-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 10px;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.file-row:last-child {
    border-bottom: none;
}

.file-actions {
    display: flex;
    gap: 10px;
}

.inline-form {
    display: inline;
}

.badge {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    background: #eef3ff;
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.85rem;
}

footer {
    text-align: center;
    color: var(--muted);
    padding: 30px 0;
}