/* ==========================================================================
   Tender Bid Simulator — UI Styles
   ========================================================================== */

:root {
    --sidebar-width: 260px;
    --sidebar-bg: #1E293B;
    --sidebar-text: #CBD5E1;
    --sidebar-active: #3B82F6;
    --header-height: 64px;
    --body-bg: #F1F5F9;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--body-bg);
    color: #334155;
}

/* Layout */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1040;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-header i {
    font-size: 1.5rem;
    color: #60A5FA;
}

.sidebar-brand {
    font-size: 1.2rem;
    color: #F1F5F9;
    letter-spacing: -0.5px;
}

.sidebar-nav {
    list-style: none;
    padding: 1rem 0;
    margin: 0;
    flex: 1;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1.5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav li a:hover {
    background: rgba(255,255,255,0.06);
    color: #F1F5F9;
}

.sidebar-nav li a.active {
    background: rgba(59,130,246,0.15);
    color: #60A5FA;
    border-left-color: #3B82F6;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-server-info {
    margin-bottom: 0.5rem;
    opacity: 0.6;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

/* Main content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.main-header {
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid #E2E8F0;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    gap: 1rem;
    position: sticky;
    top: 0;
    z-index: 1020;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    flex: 1;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.content-body {
    padding: 1.5rem;
}

/* Stat cards */
.stat-card {
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08) !important;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

/* Login page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header i {
    font-size: 2.5rem;
    color: #3B82F6;
}

.login-header h2 {
    margin: 0.5rem 0 0.25rem;
    color: #1E293B;
}

.login-header p {
    color: #64748B;
    margin: 0;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #E2E8F0;
}

/* Tables */
.table th {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #475569;
}

/* Tabs */
.nav-tabs .nav-link {
    color: #64748B;
    font-weight: 500;
    border: none;
    padding: 0.75rem 1.25rem;
}

.nav-tabs .nav-link.active {
    color: #2563EB;
    border-bottom: 2px solid #2563EB;
    background: transparent;
}

/* Cards in tabs */
.tab-content .card {
    border-radius: 8px;
}

/* Badges */
.badge {
    font-weight: 500;
}

/* Responsive */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar-toggle {
        display: block !important;
    }
}

@media (min-width: 992px) {
    .sidebar-toggle {
        display: none !important;
    }
}

/* Print */
@media print {
    .sidebar, .main-header, .sidebar-toggle { display: none !important; }
    .main-content { margin-left: 0; }
    .content-body { padding: 0; }
}