/* ================================================================
   B2B CRM — Global Design System
   Matte white | Soft green accent | App-like layout
================================================================ */

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

:root {
    --bg:          #F7F8F6;
    --surface:     #FFFFFF;
    --border:      #E8EAE6;
    --text:        #3A3D36;
    --text-muted:  #8A8E84;
    --text-light:  #B4B8AE;
    --green:       #5C8A5E;
    --green-light: #E8F0E8;
    --green-dark:  #3E6040;
    --danger:      #C0392B;
    --danger-bg:   #FDF0EF;
    --warning:     #C07A2B;
    --warning-bg:  #FDF5EF;
    --shadow-sm:   0 1px 3px rgba(0,0,0,.06);
    --shadow-md:   0 4px 16px rgba(0,0,0,.08);
    --shadow-lg:   0 8px 32px rgba(0,0,0,.1);
    --radius:      10px;
    --radius-sm:   6px;
    --font:        'DM Sans', sans-serif;
    --font-mono:   'DM Mono', monospace;
    --sidebar-w:   240px;
    --topbar-h:    58px;
    --transition:  0.2s ease;
}

html, body {
    height: 100%;
    font-family: var(--font);
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

/* ── App Shell ──────────────────────────────────────────────── */
.app-shell {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform var(--transition);
    z-index: 100;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 15px;
}

.brand-icon {
    font-size: 20px;
    color: var(--green);
}

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition);
    position: relative;
}

.nav-item:hover:not(.disabled) {
    background: var(--green-light);
    color: var(--green-dark);
}

.nav-item.active {
    background: var(--green-light);
    color: var(--green);
}

.nav-item.disabled {
    opacity: 0.5;
    cursor: default;
}

.nav-icon { font-size: 16px; width: 20px; text-align: center; }

.nav-badge {
    margin-left: auto;
    font-size: 10px;
    font-family: var(--font-mono);
    background: var(--border);
    padding: 2px 6px;
    border-radius: 20px;
    color: var(--text-light);
}

.sidebar-footer {
    padding: 14px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--green);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

.user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.user-name {
    font-weight: 500;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: capitalize;
}

.logout-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 16px;
    transition: all var(--transition);
    flex-shrink: 0;
}

.logout-btn:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

/* ── Main Area ──────────────────────────────────────────────── */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ── Topbar ─────────────────────────────────────────────────── */
.topbar {
    height: var(--topbar-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 24px;
    flex-shrink: 0;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-muted);
    padding: 4px;
}

.page-title {
    font-size: 15px;
    font-weight: 600;
    flex: 1;
}

.topbar-time {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-light);
}

/* ── Content Area ───────────────────────────────────────────── */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
}

.card-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

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

a.stat-link {
    text-decoration: none;
    display: block;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
a.stat-link:hover {
    border-color: var(--green);
    box-shadow: 0 4px 16px rgba(80,130,80,.12);
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 22px;
    margin-bottom: 6px;
    line-height: 1;
}

.stat-value {
    font-size: 28px;
    font-weight: 600;
    color: var(--green);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: .5px;
}

/* ── Forms ──────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; }

label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .4px;
}

input, select, textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
    transition: border-color var(--transition);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--green);
    background: var(--surface);
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--green);
    color: #fff;
}

.btn-primary:hover {
    background: var(--green-dark);
    box-shadow: 0 4px 12px rgba(92,138,94,.3);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--text);
}

.btn-outline:hover { border-color: var(--green); color: var(--green); }

.btn-full { width: 100%; }

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ── Alerts ─────────────────────────────────────────────────── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    border-left: 3px solid;
}

.alert-error { background: var(--danger-bg); border-color: var(--danger); color: var(--danger); }
.alert-success { background: var(--green-light); border-color: var(--green); color: var(--green-dark); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning); color: var(--warning); }

/* ── Auth Layout (login/register) ───────────────────────────── */
.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 36px 32px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 28px;
}

.auth-logo-icon {
    font-size: 32px;
    color: var(--green);
}

.auth-logo-name {
    font-size: 20px;
    font-weight: 600;
    margin-top: 6px;
}

.auth-title {
    font-size: 22px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 6px;
}

.auth-sub {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 24px;
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-muted);
}

.auth-footer a { color: var(--green); text-decoration: none; font-weight: 500; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ── Checkbox ───────────────────────────────────────────────── */
.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    margin-top: 2px;
    accent-color: var(--green);
}

.checkbox-group label {
    text-transform: none;
    letter-spacing: 0;
    font-size: 13px;
    font-weight: 400;
    color: var(--text);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0; left: 0; bottom: 0;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .menu-toggle { display: flex; }

    .main-area { width: 100%; }

    .content-area { padding: 16px; }

    .card-grid { grid-template-columns: 1fr; }

    .form-row { grid-template-columns: 1fr; }

    .auth-card { padding: 28px 20px; }
}

/* ── Overlay ────────────────────────────────────────────────── */
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.3);
    z-index: 99;
}

.overlay.show { display: block; }

/* ── Flash Message ──────────────────────────────────────────── */
.flash-message {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 13px;
    border-left: 3px solid;
    animation: flashIn .3s ease;
}

@keyframes flashIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.flash-warning {
    background: var(--warning-bg);
    border-color: var(--warning);
    color: var(--warning);
}

.flash-success {
    background: var(--green-light);
    border-color: var(--green);
    color: var(--green-dark);
}

.flash-error {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger);
}

.flash-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    color: inherit;
    opacity: .6;
    padding: 0 4px;
    line-height: 1;
    flex-shrink: 0;
}

.flash-close:hover { opacity: 1; }

/* ── Announcement Strip ──────────────────────────────────────── */
.ann-strip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 24px;
    font-size: 12px;
    line-height: 1.4;
    flex-shrink: 0;
    animation: slideDown .25s ease;
}
@keyframes slideDown {
    from { opacity:0; transform:translateY(-8px); }
    to   { opacity:1; transform:translateY(0); }
}
.ann-strip-icon { font-size: 14px; flex-shrink: 0; }
.ann-strip-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ann-strip-text strong { font-weight: 600; }
.ann-strip-text span   { opacity: .8; }
.ann-strip-close {
    background: none; border: none; cursor: pointer;
    font-size: 16px; opacity: .5; padding: 0 0 0 8px;
    line-height: 1; flex-shrink: 0; color: inherit;
    transition: opacity .15s;
}
.ann-strip-close:hover { opacity: 1; }

@media (max-width: 768px) {
    .ann-strip { padding: 8px 16px; }
    .ann-strip-text { white-space: normal; }
}

/* ── Accordion Nav Categories ────────────────────────────────── */
.nav-cat { margin-bottom: 2px; }

.nav-cat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border: none;
    border-radius: var(--radius-sm);
    background: none;
    cursor: pointer;
    font-family: var(--font);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-align: left;
    transition: all var(--transition);
    letter-spacing: .2px;
}
.nav-cat-btn:hover {
    background: var(--green-light);
    color: var(--green-dark);
}
.nav-cat.open .nav-cat-btn {
    color: var(--text);
    background: var(--bg);
}

.nav-cat-icon  { font-size: 15px; width: 20px; text-align: center; flex-shrink: 0; }
.nav-cat-label { flex: 1; }
.nav-cat-arrow {
    font-size: 11px;
    opacity: .5;
    transition: transform .2s ease;
    flex-shrink: 0;
}
.nav-cat.open .nav-cat-arrow { transform: rotate(90deg); opacity: .8; }

.nav-cat-items {
    display: none;
    flex-direction: column;
    gap: 1px;
    padding: 2px 0 4px 12px;
}
.nav-cat.open .nav-cat-items { display: flex; }

/* Indent child items slightly */
.nav-cat-items .nav-item {
    font-size: 12.5px;
    padding: 7px 10px;
}
.nav-cat-items .nav-item .nav-icon {
    font-size: 13px;
    width: 18px;
    opacity: .7;
}