:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --background: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius: 0.75rem;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: 0.95rem;
}

.page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Header / Hero */
.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.hero-content h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 8px;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.subhead {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
}

.hero-panel {
    background: var(--surface);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.panel-label {
    font-weight: 600;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.panel-actions {
    display: flex;
    gap: 8px;
}

.panel-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 12px;
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.span-2 {
    grid-column: span 2;
}

.card-header {
    margin-bottom: 8px;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.card-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Forms */
.form-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-main);
}

input, select {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
    width: 100%;
    transition: border 0.2s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.action-row {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

/* Buttons */
button {
    cursor: pointer;
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 600;
    background: var(--primary);
    color: white;
    transition: all 0.2s;
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

button.secondary {
    background: white;
    border: 1px solid var(--border);
    color: var(--text-main);
}

button.secondary:hover {
    background: var(--background);
}

button.danger {
    background: #fee2e2;
    color: var(--danger);
}

button.danger:hover {
    background: #fecaca;
}

button.ghost {
    background: transparent;
    color: var(--text-muted);
    padding: 8px 12px;
}

button.ghost:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

/* Lists & Tables */
.table {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tenant-row, .user-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr auto;
    align-items: center;
    padding: 16px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 8px;
    gap: 16px;
}

.user-row {
    grid-template-columns: 1.5fr 1.5fr auto;
}

.tenant-row strong, .user-row strong {
    font-weight: 600;
    color: var(--text-main);
}

.tenant-row small, .user-row small {
    color: var(--text-muted);
    display: block;
    margin-top: 4px;
}

.tenant-actions {
    display: flex;
    gap: 8px;
}

.result {
    margin-top: 12px;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    display: none;
}

.result:not(:empty) {
    display: block;
    background: #f1f5f9;
    color: var(--text-main);
    border: 1px solid var(--border);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    width: 100%;
    max-width: 400px;
}