/* ============================================================
   TD Business Hub — Design System
   ============================================================ */

:root {
    /* Brand */
    --color-primary:        #B1976B;
    --color-primary-dark:   #8c734b;
    --color-primary-bg:     #faf5ec;
    --color-primary-border: #ddd0b8;

    /* Status */
    --color-success:        #38a169;
    --color-danger:         #e53e3e;
    --color-warning:        #d69e2e;
    --color-info:           #3182ce;

    /* Text */
    --color-text:           #1a1a2e;
    --color-text-muted:     #6b7280;

    /* Structure */
    --color-border:         #e5e7eb;
    --color-bg:             #f8f9fa;
    --color-white:          #ffffff;
    --color-card:           #ffffff;

    /* Spacing */
    --spacing-xs:   4px;
    --spacing-sm:   8px;
    --spacing-md:   16px;
    --spacing-lg:   24px;
    --spacing-xl:   32px;
    --spacing-2xl:  48px;

    /* Radius */
    --radius-sm:   4px;
    --radius-md:   8px;
    --radius-lg:   12px;
    --radius-full: 9999px;

    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);

    /* Font weights */
    --font-weight-normal:   400;
    --font-weight-medium:   500;
    --font-weight-semibold: 600;
    --font-weight-bold:     700;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.main-wrapper { flex: 1; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; }
input, select, textarea, button { font: inherit; }

/* ---- Header ---- */
.app-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.header-container {
    max-width: 1280px;
    margin: 0;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    height: 56px;
    gap: var(--spacing-lg);
}
.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}
.header-logo-badge {
    width: 30px;
    height: 30px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: 12px;
    letter-spacing: .04em;
    flex-shrink: 0;
}
.header-logo-text {
    font-weight: var(--font-weight-bold);
    font-size: 15px;
    color: var(--color-text);
}
.header-nav {
    display: flex;
    gap: 2px;
    flex: 1;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
    font-size: 13px;
    transition: background .15s, color .15s;
    white-space: nowrap;
}
.nav-link:hover { background: var(--color-bg); color: var(--color-text); }
.nav-link.active { background: var(--color-primary-bg); color: var(--color-primary); }
.nav-separator {
    width: 1px;
    height: 16px;
    background: var(--color-border);
    margin: 0 4px;
    flex-shrink: 0;
    align-self: center;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-left: auto;
}

/* ---- Burger ---- */
.burger-btn {
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: var(--spacing-xs);
    color: var(--color-text-muted);
    margin-left: auto;
    border-radius: var(--radius-sm);
}
.burger-btn:hover { background: var(--color-bg); }

/* ---- Impersonation Banner ---- */
.impersonation-banner {
    background: var(--color-warning);
    color: #fff;
    padding: 6px var(--spacing-xl);
    font-size: 12px;
    font-weight: var(--font-weight-semibold);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}
.impersonation-banner .stop-btn {
    background: rgba(255,255,255,.25);
    border: 1px solid rgba(255,255,255,.5);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 2px 12px;
    font-size: 11px;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: background .15s;
}
.impersonation-banner .stop-btn:hover { background: rgba(255,255,255,.4); }

/* ---- Tenant Badge ---- */
.tenant-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--color-primary-bg);
    border: 1px solid var(--color-primary-border);
    border-radius: var(--radius-full);
    padding: 3px 12px 3px 8px;
    font-size: 12px;
    color: var(--color-primary-dark);
    font-weight: var(--font-weight-medium);
}
.tenant-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
    flex-shrink: 0;
}

/* ---- User Dropdown ---- */
.user-menu { position: relative; }
.user-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 4px 10px;
    font-size: 12px;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: background .15s, border-color .15s;
}
.user-btn:hover { background: var(--color-bg); border-color: var(--color-primary); color: var(--color-text); }
.user-btn > span { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 6px);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    min-width: 210px;
    z-index: 200;
}
.user-dropdown.open { display: block; }
.user-dropdown-header {
    padding: 10px var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}
.user-dropdown-header strong { display: block; font-weight: var(--font-weight-semibold); font-size: 13px; color: var(--color-text); }
.user-dropdown-header span { color: var(--color-text-muted); font-size: 11px; }
.user-dropdown a,
.user-dropdown button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 8px var(--spacing-md);
    font-size: 13px;
    color: var(--color-text);
    text-decoration: none;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: background .1s;
}
.user-dropdown a:hover,
.user-dropdown button:hover { background: var(--color-bg); }
.user-dropdown .danger-action { color: var(--color-danger); }
.user-dropdown-section {
    padding: 6px var(--spacing-md) 2px;
    border-top: 1px solid var(--color-border);
    margin-top: 2px;
}
.user-dropdown-section-label {
    font-size: 10px;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ---- Main Layout ---- */
.main-container {
    max-width: 1280px;
    margin: 0;
    padding: var(--spacing-xl) var(--spacing-xl);
}
.page-title {
    font-size: 22px;
    font-weight: var(--font-weight-bold);
    margin: 0 0 4px;
    color: var(--color-text);
}
.page-subtitle {
    color: var(--color-text-muted);
    margin: 0 0 var(--spacing-xl);
    font-size: 13px;
}

/* ---- Cards ---- */
.card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}
.card-title {
    font-size: 15px;
    font-weight: var(--font-weight-semibold);
    margin: 0 0 var(--spacing-md);
    color: var(--color-text);
}
.card-subtitle {
    font-size: 12px;
    color: var(--color-text-muted);
    margin: -8px 0 var(--spacing-md);
}

/* ---- Grid ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-lg); }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ---- Forms ---- */
.form-group { margin-bottom: var(--spacing-md); }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}
.form-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color .15s, box-shadow .15s;
    outline: none;
}
.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(177, 151, 107, .15);
}
.form-input::placeholder { color: var(--color-text-muted); }
.form-error {
    font-size: 12px;
    color: var(--color-danger);
    margin-top: 4px;
}
.form-hint {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 13px;
}
.form-check input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}
.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: var(--font-weight-semibold);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background .15s, border-color .15s, color .15s;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.btn-secondary {
    background: var(--color-white);
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-bg); }
.btn-danger {
    background: var(--color-danger);
    color: var(--color-white);
    border-color: var(--color-danger);
}
.btn-danger:hover { background: #c53030; border-color: #c53030; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-full { width: 100%; }

/* ---- Alerts ---- */
.alert {
    padding: 12px var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 13px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.alert-success { background: #f0fff4; border: 1px solid #9ae6b4; color: #276749; }
.alert-danger  { background: #fff5f5; border: 1px solid #feb2b2; color: #c53030; }
.alert-warning { background: #fffbeb; border: 1px solid #fbd38d; color: #b7791f; }
.alert-info    { background: #ebf8ff; border: 1px solid #90cdf4; color: #2c5282; }

/* ---- Badge ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
}
.badge-primary { background: var(--color-primary-bg); color: var(--color-primary-dark); border: 1px solid var(--color-primary-border); }
.badge-success { background: #f0fff4; color: #276749; border: 1px solid #9ae6b4; }
.badge-warning { background: #fffbeb; color: #b7791f; border: 1px solid #fbd38d; }
.badge-danger  { background: #fff5f5; color: #c53030; border: 1px solid #feb2b2; }
.badge-muted   { background: var(--color-bg); color: var(--color-text-muted); border: 1px solid var(--color-border); }

/* ---- Tables ---- */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead { background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
th {
    padding: 10px var(--spacing-md);
    text-align: left;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .05em;
    white-space: nowrap;
}
td {
    padding: 10px var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--color-bg); }

/* ---- Auth Layout ---- */
.auth-page {
    min-height: 100vh;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}
.auth-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl) var(--spacing-xl);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}
.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}
.auth-logo-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: var(--font-weight-bold);
    letter-spacing: .04em;
    margin-bottom: var(--spacing-sm);
}
.auth-logo h1 {
    font-size: 18px;
    font-weight: var(--font-weight-bold);
    margin: 0;
    color: var(--color-text);
}
.auth-logo p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin: 4px 0 0;
}
.auth-status {
    background: var(--color-primary-bg);
    border: 1px solid var(--color-primary-border);
    color: var(--color-primary-dark);
    border-radius: var(--radius-md);
    padding: 10px var(--spacing-md);
    font-size: 13px;
    margin-bottom: var(--spacing-md);
}

/* ---- Footer ---- */
.app-footer {
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-xl);
    margin-top: auto;
    font-size: 11px;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}
.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-text-muted);
    font-size: 11px;
    transition: color .15s;
}
.footer-link:hover { color: var(--color-primary); }

/* ---- Changelog ---- */
.changelog-content h2 {
    font-size: 16px;
    font-weight: var(--font-weight-bold);
    margin: var(--spacing-xl) 0 var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}
.changelog-content h2:first-child { margin-top: 0; }
.changelog-content ul { padding-left: var(--spacing-lg); margin: var(--spacing-xs) 0; }
.changelog-content li { margin-bottom: 4px; font-size: 13px; }
.changelog-content p { font-size: 13px; color: var(--color-text-muted); }

/* ---- Profile ---- */
.profile-section {
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-xl);
}
.profile-section:last-child { border-bottom: none; margin-bottom: 0; }
.profile-section-title { font-size: 16px; font-weight: var(--font-weight-semibold); margin: 0 0 4px; }
.profile-section-subtitle { font-size: 13px; color: var(--color-text-muted); margin: 0 0 var(--spacing-lg); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .header-nav {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-sm);
        gap: 2px;
        box-shadow: var(--shadow-md);
        z-index: 99;
    }
    .header-nav.open { display: flex; }
    .nav-separator { display: none; }
    .burger-btn { display: flex; }
    .tenant-badge > span:last-child { display: none; }
    .main-container { padding: var(--spacing-md); }
    .impersonation-banner { padding: 6px var(--spacing-md); flex-wrap: wrap; }
    .auth-card { padding: var(--spacing-xl) var(--spacing-md); }
    .app-footer { flex-direction: column; align-items: flex-start; gap: 4px; }
}