/* frontend/css/style.css */

:root {
    /* Light Theme Tokens */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #10b981;
    --bg-base: #f8fafc;
    --bg-surface: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Semantic Colors */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    /* Dark Theme Tokens */
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --secondary: #34d399;
    --bg-base: #0f172a;
    --bg-surface: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base);
    color: var(--text-main);
    line-height: 1.5;
    transition: var(--transition);
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.w-full { width: 100%; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    background-color: var(--bg-surface);
    color: var(--text-main);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Loading Spinner */
.initial-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: var(--bg-base);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Layout: Sidebar + Main Content */
.app-layout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 260px;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    z-index: 10;
}

.sidebar-header {
    height: 64px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text-muted);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-item i {
    width: 24px;
    margin-right: 0.75rem;
    font-size: 1.125rem;
}

.nav-item:hover, .nav-item.active {
    color: var(--primary);
    background-color: rgba(59, 130, 246, 0.05);
}

.nav-item.active {
    border-left-color: var(--primary);
    font-weight: 600;
}

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.topbar {
    height: 64px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.topbar-left {
    display: flex;
    align-items: center;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--primary);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    background-color: var(--bg-base);
}

/* Dashboard Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background-color: var(--bg-surface);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.kpi-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.5rem;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: 1.25rem;
}

.kpi-info h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.kpi-info p {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-base);
    padding: 1rem;
}

.auth-card {
    background-color: var(--bg-surface);
    width: 100%;
    max-width: 400px;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 2.5rem 2rem;
    border: 1px solid var(--border-color);
}

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

.auth-header h1 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

#auth-error {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
    padding: 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: none;
}

/* Cards & Tables */
.card {
    background-color: var(--bg-surface);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
}

.table-responsive .table {
    white-space: nowrap;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th, .table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    color: var(--text-muted);
    background-color: rgba(0,0,0,0.02);
}

.table tr:hover td {
    background-color: rgba(59, 130, 246, 0.02);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-success { background-color: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-danger { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }
.badge-warning { background-color: rgba(245, 158, 11, 0.1); color: var(--warning); }
.badge-info { background-color: rgba(59, 130, 246, 0.1); color: var(--info); }

/* Actions */
.action-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    margin-right: 0.5rem;
    transition: var(--transition);
}
.action-btn:hover { color: var(--primary); }
.action-btn.delete:hover { color: var(--danger); }

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    backdrop-filter: blur(4px);
}

.modal {
    background-color: var(--bg-surface);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 { font-size: 1.125rem; }

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
}
.close-btn:hover { color: var(--text-main); }

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    margin-top: 1.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Tabs */
.tabs-bar {
    display: flex;
    gap: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    scrollbar-width: none; /* Firefox */
}
.tabs-bar::-webkit-scrollbar {
    display: none; /* Safari and Chrome */
}

.tab-btn {
    padding: 0.625rem 1.25rem;
    border: none;
    background: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Kanban Pipeline */
.kanban-col {
    min-width: 220px;
    flex: 1;
    background: var(--bg-surface);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.kanban-col-header {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem 0;
    margin-bottom: 0.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.kanban-card {
    background: var(--bg-base);
    border-radius: 0.5rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}
.kanban-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}
.kanban-card-title { font-weight: 600; margin-bottom: 0.35rem; color: var(--text-main); }
.kanban-card-value { color: var(--primary); font-weight: 700; font-size: 0.875rem; }
.kanban-card-meta { color: var(--text-muted); margin-top: 0.35rem; font-size: 0.75rem; }

/* Stage color dots */
.stage-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 0.35rem; }
.stage-New        .kanban-col-header { color: #6366f1; }
.stage-Contacted  .kanban-col-header { color: #3b82f6; }
.stage-Qualified  .kanban-col-header { color: #06b6d4; }
.stage-Proposal   .kanban-col-header { color: var(--warning); }
.stage-Negotiation .kanban-col-header { color: #f97316; }
.stage-Won        .kanban-col-header { color: var(--success); }
.stage-Lost       .kanban-col-header { color: var(--danger); }

/* Mobile Responsive Adjustments */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    margin-right: 1rem;
    transition: var(--transition);
}

.mobile-toggle:hover {
    color: var(--primary);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 40;
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.open {
    display: block;
    opacity: 1;
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: inline-flex;
    }
    
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        width: 260px;
        z-index: 50;
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .topbar {
        padding: 0 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .modal {
        max-width: 95%;
        margin: 1rem auto;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .kanban-col {
        min-width: 260px;
    }
    
    .topbar-left h2 {
        font-size: 1.1rem !important;
    }
    
    /* Force all inline grids (forms, multi-column cards) to stack into a single column on mobile */
    [style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
}