:root {
    --ds-background-default: #FAFBFC;
    --ds-background-card: #FFFFFF;
    --ds-text: #172B4D;
    --ds-text-subtle: #5E6C84;
    --ds-border: #DFE1E6;
    --ds-border-focused: #4C9AFF;
    --primary-color: #0052CC;
    --primary-hover: #0065FF;
    --secondary-bg: #EBECF0;
    --secondary-hover: #DFE1E6;
    --danger-color: #DE350B;
    --danger-hover: #BF2600;
    --danger-bg: #FFEBE6;
    --danger-border: #FFBDAD;
    --success-color: #006644;
    --success-bg: #E3FCEF;
    --success-border: #ABF5D1;
    --success-btn: #36B37E;
    --success-btn-hover: #00875A;
    --warning-bg: #FFF0B3;
    --warning-text: #172B4D;
    --warning-border: #FFE380;
    --draft-bg: #EBECF0;
    --draft-text: #172B4D;
    --draft-border: #DFE1E6;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--ds-background-default);
    color: var(--ds-text);
    line-height: 1.4;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-container {
    width: 100%;
    max-width: 650px;
    background-color: var(--ds-background-card);
    border: 1px solid var(--ds-border);
    border-radius: 6px;
    box-shadow: 0 1px 2px rgba(9, 30, 66, 0.15);
    overflow: hidden;
}

header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--ds-border);
    background-color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; }
.logo { height: 40px; object-fit: contain; }

nav.main-nav {
    background-color: #FAFBFC;
    border-bottom: 1px solid var(--ds-border);
    padding: 6px 16px;
}

nav.main-nav ul { list-style: none; display: flex; gap: 12px; margin: 0; padding: 0; }
nav.main-nav a {
    text-decoration: none;
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
}
nav.main-nav a:hover { background-color: #EBECF0; color: var(--primary-hover); }
nav.main-nav a.active { color: var(--ds-text); font-weight: 700; background-color: #DFE1E6; }

.form-group { display: flex; flex-direction: column; gap: 4px; }
label { font-size: 0.8rem; font-weight: 600; color: var(--ds-text-subtle); }
label.required::after { content: " *"; color: var(--danger-color); }

input[type="text"], input[type="password"], select, textarea {
    width: 100%;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--ds-text);
    background-color: #FFFFFF;
    border: 1px solid var(--ds-border);
    border-radius: 4px;
    padding: 6px 10px;
    outline: none;
}

input[disabled], select[disabled], textarea[readonly] {
    background-color: #F4F5F7 !important;
    color: var(--ds-text-subtle);
    cursor: not-allowed;
}

textarea { resize: vertical; min-height: 50px; }

.btn {
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 4px;
    cursor: pointer;
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-primary { background-color: var(--primary-color); color: white; }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-secondary { background-color: var(--secondary-bg); color: var(--ds-text); }
.btn-secondary:hover { background-color: var(--secondary-hover); }
.btn-danger { background-color: var(--danger-color); color: white; }
.btn-danger:hover { background-color: var(--danger-hover); }
.btn-success { background-color: var(--success-btn); color: white; }
.btn-success:hover { background-color: var(--success-btn-hover); }

.badge { padding: 10px; border-radius: 4px; font-size: 0.85rem; font-weight: 500; display: none; }
.badge-error { background-color: var(--danger-bg); color: var(--danger-color); border: 1px solid var(--danger-border); }
.badge-success { background-color: var(--success-bg); color: var(--success-color); border: 1px solid var(--success-border); }

.loader-container { padding: 30px; text-align: center; color: var(--ds-text-subtle); }
.error-message { background-color: var(--danger-bg); color: var(--danger-color); border: 1px solid var(--danger-border); padding: 10px; border-radius: 4px; margin: 12px; font-size: 0.85rem; }