:root {
    --bg-color: #f0f2f5;
    --text-color: #2c3e50;
    --card-bg: #fff;
    --border-color: #dcdfe6;
    --input-bg: #fff;
    --header-bg: #e8eaed;
    --row-hover: #f7f9fc;
    --row-even: #fafbfc;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --border-color: #404040;
    --input-bg: #2a2a2a;
    --header-bg: #2d2d2d;
    --row-hover: #333333;
    --row-even: #252525;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 24px;
    animation: fadeInDown 0.5s ease-out;
    position: relative;
}

.theme-toggle {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px 8px;
}

.header h1 {
    font-size: 1.3rem;
    color: var(--text-color);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.header h1 span {
    color: #c0392b;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    animation: fadeInUp 0.5s ease-out;
}

.login-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    width: 100%;
    max-width: 400px;
    color: var(--text-color);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-color);
    font-size: 1.2rem;
}

.login-error {
    color: #e74c3c;
    text-align: center;
    margin-top: 12px;
    font-size: 0.9rem;
}

.login-success {
    color: #27ae60;
    text-align: center;
    margin-top: 12px;
    font-size: 0.9rem;
}

.user-info {
    padding: 12px 16px;
    background: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--text-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
}

.user-info button {
    padding: 6px 12px;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
}

.form-controls {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    animation: fadeInUp 0.5s ease-out 0.1s both;
}

.form-group {
    flex: 1;
    min-width: 250px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: #555;
    margin-bottom: 6px;
    font-weight: 600;
}

.form-group select,
.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    background: var(--input-bg);
    color: var(--text-color);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    outline: none;
}

.form-group select:focus,
.form-group input:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.opsti-podaci-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    margin-bottom: 20px;
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out 0.15s both;
}

.opsti-podaci-header {
    padding: 14px 20px;
    background: var(--header-bg);
    border-bottom: 2px solid var(--border-color);
}

.opsti-podaci-header h3 {
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 700;
}

.opsti-podaci-body {
    display: flex;
    gap: 20px;
    padding: 20px;
    flex-wrap: wrap;
}

.opsti-podaci-body .form-group {
    flex: 1;
    min-width: 220px;
}

.opsti-podaci-footer {
    padding: 16px 20px;
    text-align: right;
    border-top: 1px solid var(--border-color);
}

.tabs-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out 0.2s both;
}

.tabs-nav {
    display: flex;
    background: var(--header-bg);
    border-bottom: 2px solid var(--border-color);
    padding: 0;
    overflow-x: auto;
}

.tabs-nav button {
    padding: 14px 24px;
    border: none;
    background: transparent;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.tabs-nav button::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: #3498db;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tabs-nav button:hover {
    color: #2980b9;
    background: #eef6fc;
}

.tabs-nav button.active {
    color: var(--text-color);
    background: var(--card-bg);
}

.tabs-nav button.active::after {
    transform: scaleX(1);
}

.tab-content {
    padding: 0;
    overflow-x: auto;
}

.tab-content:not(.active) {
    display: none;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.data-table thead th {
    background: var(--header-bg);
    color: var(--text-color);
    font-weight: 700;
    padding: 12px 10px;
    text-align: center;
    border: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-table tbody tr {
    transition: background 0.2s ease;
}

.data-table tbody tr:hover {
    background: var(--row-hover);
}

.data-table tbody tr:nth-child(even) {
    background: var(--row-even);
}

.data-table tbody tr:nth-child(even):hover {
    background: var(--row-hover);
}

.data-table td {
    border: 1px solid var(--border-color);
    padding: 0;
}

.data-table td input,
.data-table td select {
    width: 100%;
    padding: 10px 8px;
    border: none;
    font-size: 0.88rem;
    background: transparent;
    color: var(--text-color);
    outline: none;
    transition: background 0.2s ease;
}

.data-table td input:focus,
.data-table td select:focus {
    background: #fff8e1;
    box-shadow: inset 0 0 0 2px #3498db;
}

.delete-row {
    width: 100%;
    padding: 10px 8px;
    border: none;
    background: transparent;
    color: #e74c3c;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.delete-row:hover {
    background: #fdecea;
    color: #c0392b;
}

.status-readonly {
    padding: 10px 8px;
    font-size: 0.88rem;
    color: #666;
}

.add-row-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px;
    background: #27ae60;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    gap: 8px;
}

.add-row-btn:hover {
    background: #219a52;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

.add-row-btn:active {
    transform: translateY(0);
}

.add-row-btn .icon {
    font-size: 1.2rem;
}

.save-area {
    margin-top: 20px;
    text-align: right;
    animation: fadeInUp 0.5s ease-out 0.3s both;
}

.btn-save {
    padding: 12px 36px;
    background: linear-gradient(135deg, #2980b9, #3498db);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-save:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn-save:active {
    transform: translateY(0);
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes rowSlideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.row-slide-in {
    animation: rowSlideIn 0.3s ease-out;
}

.confirm-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.confirm-box {
    background: #fff;
    padding: 24px;
    border-radius: 12px;
    text-align: center;
    min-width: 300px;
}

.confirm-box p {
    margin-bottom: 20px;
    font-size: 1rem;
    color: #2c3e50;
}

.confirm-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.confirm-buttons button {
    padding: 8px 24px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}

.confirm-buttons button:first-child {
    background: #e74c3c;
    color: #fff;
}

.confirm-buttons button:last-child {
    background: #3498db;
    color: #fff;
}

.report-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.report-content {
    background: #fff;
    color: #2c3e50;
    width: 95%;
    height: 95%;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.report-content * {
    color: #2c3e50;
}

.report-content input,
.report-content select,
.report-content button {
    background: #fff;
    color: #2c3e50;
    border-color: #dcdfe6;
}

.report-content .data-table thead th {
    background: #e8eaed;
    color: #2c3e50;
}

.report-content .data-table tbody tr:nth-child(even) {
    background: #fafbfc;
}

.report-content .data-table tbody tr:hover {
    background: #f7f9fc;
}

.report-header {
    padding: 16px 20px;
    background: #2c3e50;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.report-header h2 {
    font-size: 1.1rem;
    margin: 0;
}

.report-close {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.report-filters {
    padding: 12px 20px;
    background: #f7f8fa;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.report-filters input {
    padding: 8px 12px;
    border: 1px solid #dcdfe6;
    border-radius: 6px;
    flex: 1;
    min-width: 200px;
}

.report-filters select {
    padding: 8px 12px;
    border: 1px solid #dcdfe6;
    border-radius: 6px;
}

.report-filters button {
    padding: 8px 16px;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.report-table-container {
    flex: 1;
    overflow: auto;
    padding: 0 20px 20px;
}

@media print {
    body * {
        visibility: hidden;
    }
    .report-modal, .report-modal * {
        visibility: visible;
    }
    .report-modal {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: auto;
        background: #fff;
    }
    .report-content {
        width: 100%;
        height: auto;
        box-shadow: none;
    }
    .report-header {
        background: #fff;
        color: #000;
        border-bottom: 2px solid #000;
    }
    .report-filters, .report-close {
        display: none;
    }
    .report-table-container {
        overflow: visible;
        padding: 0;
    }
    .data-table {
        font-size: 10px;
    }
    .data-table th, .data-table td {
        border: 1px solid #000;
        padding: 4px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .form-controls {
        flex-direction: column;
    }

    .form-group {
        min-width: 100%;
    }

    .tabs-nav button {
        padding: 12px 16px;
        font-size: 0.8rem;
    }

    .data-table {
        font-size: 0.8rem;
    }

    .data-table td input {
        padding: 8px 4px;
        font-size: 0.8rem;
    }
}