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

:root {
    /* Energetyka Wagon - Kolory brandowe */
    --primary-color: #0066cc;        /* Niebieski energetyczny */
    --primary-dark: #004d99;         /* Ciemniejszy niebieski */
    --primary-light: #3385d6;        /* Jaśniejszy niebieski */
    --accent-color: #00a86b;         /* Zielony energetyczny */
    --accent-light: #33c085;         /* Jaśniejszy zielony */
    --secondary-color: #5a6c7d;       /* Szary neutralny */
    --success-color: #00a86b;        /* Zielony sukces */
    --danger-color: #e63946;         /* Czerwony */
    --warning-color: #ffa500;        /* Pomarańczowy */
    --bg-color: #f5f7fa;             /* Jasne tło */
    --card-bg: #ffffff;               /* Białe karty */
    --text-primary: #1a1a1a;          /* Ciemny tekst */
    --text-secondary: #5a6c7d;        /* Szary tekst */
    --border-color: #d1d9e0;          /* Kolor obramowań */
    --sidebar-bg: #003366;           /* Ciemny niebieski sidebar */
    --sidebar-text: #e6f0f5;          /* Jasny tekst w sidebarze */
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #00a86b 100%);
    --gradient-sidebar: linear-gradient(180deg, #003366 0%, #004d99 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 168, 107, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 102, 204, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.login-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

.login-box h1 {
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    font-size: 2.5em;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.login-info {
    margin-top: 20px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 8px;
    font-size: 0.9em;
}

.login-info code {
    background: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 102, 204, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0052a3 0%, #008a5a 100%);
    box-shadow: 0 4px 8px rgba(0, 102, 204, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

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

/* Error Message */
.error-message {
    background-color: #fee2e2;
    color: #991b1b;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 15px;
}

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

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--gradient-sidebar);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    color: white;
    margin-bottom: 15px;
    font-size: 1.5em;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.user-role {
    font-size: 0.85em;
    color: var(--sidebar-text);
    opacity: 0.8;
}

.sidebar-nav {
    flex: 1;
    padding: 10px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: background-color 0.2s;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border-left: 3px solid var(--accent-color);
    font-weight: 600;
}

.nav-item i {
    width: 20px;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.view-toggle {
    display: flex;
    gap: 5px;
    background: var(--bg-color);
    padding: 4px;
    border-radius: 8px;
}

.view-toggle-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: all 0.2s;
}

.view-toggle-btn.active {
    background: var(--primary-color);
    color: white;
}

.view-toggle-btn:hover:not(.active) {
    background: var(--border-color);
}

.transactions-view {
    width: 100%;
}

.page-header h1 {
    font-size: 28px;
    color: var(--text-primary);
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.calendar-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.calendar-controls h2 {
    min-width: 200px;
    text-align: center;
}

/* Search Bar */
.search-bar {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
}

.search-bar input,
.search-bar select {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.search-bar input {
    flex: 1;
}

/* Filters Section */
.filters-section {
    margin-bottom: 20px;
}

.filters-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filter-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.filter-row:last-child {
    margin-bottom: 0;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filter-group label {
    font-size: 0.9em;
    font-weight: 500;
    color: var(--text-primary);
}

.filter-group input,
.filter-group select {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background-color: var(--bg-color);
}

th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background-color: var(--bg-color);
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 500;
}

.status-new { background-color: #e6f2ff; color: #0066cc; border: 1px solid #b3d9ff; }
.status-in_progress { background-color: #fff4e6; color: #cc6600; border: 1px solid #ffd9b3; }
.status-negotiation { background-color: #ffe6f2; color: #cc0066; border: 1px solid #ffb3d9; }
.status-won { background-color: #e6faf0; color: #00a86b; border: 1px solid #b3f0d9; }
.status-lost { background-color: #ffe6e6; color: #e63946; border: 1px solid #ffb3b3; }
.status-cancelled { background-color: #f0f0f0; color: #666666; border: 1px solid #d0d0d0; }

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 8px;
    width: 100%;
    max-width: 600px;
    margin: 20px auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-content.large {
    max-width: 900px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
}

.close {
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Comments */
.comment-item {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-date {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.comment-text {
    color: var(--text-primary);
}

.add-comment {
    margin-top: 20px;
}

.add-comment textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 10px;
    resize: vertical;
}

/* Tasks */
.task-item {
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 10px;
    background: var(--bg-color);
}

.task-item.completed {
    opacity: 0.6;
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.task-title {
    font-weight: 600;
    color: var(--text-primary);
}

.task-type {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    background: var(--accent-color);
    color: white;
    font-weight: 500;
}

.task-due-date {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.task-actions {
    display: flex;
    gap: 5px;
}

/* Files */
.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 10px;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.file-meta {
    font-size: 0.85em;
    color: var(--text-secondary);
}

/* Calendar */
.calendar-view {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.calendar-day-header {
    background: var(--bg-color);
    padding: 10px;
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
}

.calendar-day {
    background: var(--card-bg);
    min-height: 100px;
    padding: 8px;
    position: relative;
    cursor: pointer;
    transition: background-color 0.2s;
}

.calendar-day:hover {
    background: #f0f4f8;
}

.calendar-day.other-month {
    cursor: default;
}

.calendar-day.other-month:hover {
    background: #f8f9fa;
}

.calendar-day.other-month {
    background: #f8f9fa;
    opacity: 0.5;
}

.calendar-day.today {
    background: #eff6ff;
}

.day-number {
    font-weight: 600;
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.day-add-task {
    opacity: 0;
    transition: opacity 0.2s;
    color: var(--primary-color);
    font-size: 0.9em;
    cursor: pointer;
}

.calendar-day:hover .day-add-task {
    opacity: 1;
}

.calendar-day.other-month .day-add-task {
    display: none;
}

.calendar-task {
    font-size: 0.75em;
    padding: 2px 6px;
    margin: 2px 0;
    border-radius: 3px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.calendar-task.call { background: #e6f2ff; color: #0066cc; border-left: 3px solid #0066cc; }
.calendar-task.email { background: #ffe6f2; color: #cc0066; border-left: 3px solid #cc0066; }
.calendar-task.meeting { background: #fff4e6; color: #cc6600; border-left: 3px solid #ffa500; }
.calendar-task.offer { background: #e6faf0; color: #00a86b; border-left: 3px solid #00a86b; }
.calendar-task.other { background: #f0f0f0; color: #5a6c7d; border-left: 3px solid #5a6c7d; }

/* Contacts */
.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 10px;
}

.contact-info {
    flex: 1;
}

.contact-name {
    font-weight: 500;
    color: var(--text-primary);
}

.contact-details {
    font-size: 0.85em;
    color: var(--text-secondary);
}

.contact-primary {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75em;
    background: var(--accent-color);
    color: white;
    margin-left: 8px;
    font-weight: 500;
}

/* Kanban Board */
.kanban-board {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 20px 0;
    min-height: 600px;
}

.kanban-column {
    min-width: 300px;
    max-width: 300px;
    background: var(--bg-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.kanban-column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.kanban-column-title {
    font-weight: 600;
    font-size: 1.1em;
    color: var(--text-primary);
}

.kanban-column-count {
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 600;
}

.kanban-column-content {
    flex: 1;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.kanban-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 15px;
    cursor: move;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
    border-left: 4px solid var(--primary-color);
}

.kanban-card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.kanban-card.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
}

.kanban-card-header {
    margin-bottom: 10px;
}

.kanban-card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
    font-size: 1em;
}

.kanban-card-client {
    font-size: 0.85em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.kanban-card-body {
    margin-bottom: 10px;
}

.kanban-card-subject {
    font-size: 0.9em;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.kanban-card-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.85em;
    color: var(--text-secondary);
}

.kanban-card-value {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1em;
}

.kanban-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.kanban-card-salesperson {
    font-size: 0.8em;
    color: var(--text-secondary);
}

.kanban-card-actions {
    display: flex;
    gap: 5px;
}

.kanban-card-actions .btn {
    padding: 4px 8px;
    font-size: 0.85em;
}

.kanban-column.new .kanban-column-header {
    border-bottom-color: #0066cc;
}

.kanban-column.in_progress .kanban-column-header {
    border-bottom-color: #ffa500;
}

.kanban-column.negotiation .kanban-column-header {
    border-bottom-color: #cc0066;
}

.kanban-column.won .kanban-column-header {
    border-bottom-color: #00a86b;
}

.kanban-column.lost .kanban-column-header {
    border-bottom-color: #e63946;
}

.kanban-column.cancelled .kanban-column-header {
    border-bottom-color: #666666;
}

.kanban-card.new {
    border-left-color: #0066cc;
}

.kanban-card.in_progress {
    border-left-color: #ffa500;
}

.kanban-card.negotiation {
    border-left-color: #cc0066;
}

.kanban-card.won {
    border-left-color: #00a86b;
}

.kanban-card.lost {
    border-left-color: #e63946;
}

.kanban-card.cancelled {
    border-left-color: #666666;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .calendar-grid {
        grid-template-columns: repeat(7, minmax(0, 1fr));
    }
    
    .calendar-day {
        min-height: 60px;
    }
    
    .kanban-board {
        flex-direction: column;
    }
    
    .kanban-column {
        min-width: 100%;
        max-width: 100%;
    }
}