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

:root {
    --primary-color: #3b82f6;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;

    --color-meeting: #dc2626;
    --color-deep-work: #16a34a;
    --color-client: #f59e0b;
    --color-internal: #3b82f6;
    --color-admin: #a855f7;
    --color-lunch: #94a3b8;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--surface);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 28px;
    margin-bottom: 5px;
    color: var(--primary-color);
}

header p {
    color: var(--text-secondary);
}

/* Tabs Navigation */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border);
    background: var(--surface);
    padding: 0 20px;
    border-radius: 8px 8px 0 0;
}

.tab-button {
    padding: 12px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    margin-bottom: -2px;
}

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

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

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

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

/* Input Tab */
.input-container,
.calendar-container,
.summary-container,
.settings-container {
    background: var(--surface);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.section {
    margin-bottom: 30px;
}

.section h2 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section small {
    display: block;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Format Help */
.format-help {
    background: #f0f9ff;
    border-left: 4px solid var(--primary-color);
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.format-help strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 8px;
}

.format-help ul {
    list-style-position: inside;
    margin-left: 0;
}

.format-help li {
    margin-bottom: 4px;
    color: var(--text-secondary);
}

.format-help code {
    background: white;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 12px;
}

/* Form Elements */
input[type="text"],
input[type="date"],
input[type="time"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

/* Buttons */
.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

.btn-secondary:hover {
    background: #475569;
    box-shadow: 0 4px 12px rgba(100, 116, 139, 0.3);
}

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

.btn-danger:hover {
    background: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.button-group .btn {
    flex: 1;
}

/* Loading & Messages */
.loading {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: #dbeafe;
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    color: var(--primary-color);
    font-weight: 500;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(59, 130, 246, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.error {
    display: none;
    padding: 15px;
    background: #fee2e2;
    border-left: 4px solid var(--danger-color);
    border-radius: 4px;
    color: var(--danger-color);
    font-weight: 500;
    margin-bottom: 20px;
}

.error.visible {
    display: block;
}

/* List Container */
.list-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
}

.list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 6px;
}

.list-item-content {
    flex: 1;
}

.list-item-title {
    font-weight: 500;
    color: var(--text-primary);
}

.list-item-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
}

.list-item-actions {
    display: flex;
    gap: 8px;
}

.list-item-actions button {
    padding: 6px 10px;
    font-size: 12px;
}

/* Calendar */
.calendar-grid {
    display: grid;
    gap: 20px;
    margin-bottom: 20px;
}

.day-column {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.day-header {
    background: var(--primary-color);
    color: white;
    padding: 15px;
    font-weight: bold;
    text-align: center;
}

.day-blocks {
    display: flex;
    flex-direction: column;
    min-height: 400px;
}

.time-block {
    padding: 12px;
    margin: 2px;
    border-radius: 4px;
    font-size: 12px;
    border-left: 4px solid;
    cursor: pointer;
    transition: all 0.3s ease;
}

.time-block:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateX(2px);
}

.time-block.meeting {
    background: #fee2e2;
    border-left-color: var(--color-meeting);
    color: #991b1b;
}

.time-block.deep-work {
    background: #dcfce7;
    border-left-color: var(--color-deep-work);
    color: #15803d;
}

.time-block.client {
    background: #fef3c7;
    border-left-color: var(--color-client);
    color: #92400e;
}

.time-block.internal {
    background: #dbeafe;
    border-left-color: var(--color-internal);
    color: #0c4a6e;
}

.time-block.admin {
    background: #f3e8ff;
    border-left-color: var(--color-admin);
    color: #581c87;
}

.time-block.lunch {
    background: #e2e8f0;
    border-left-color: var(--color-lunch);
    color: #334155;
}

.time-block-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.time-block-time {
    font-size: 11px;
    opacity: 0.8;
    margin-bottom: 2px;
}

.time-block-duration {
    font-size: 11px;
    font-style: italic;
}

.manual-badge {
    display: inline-block;
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 4px;
    border-radius: 2px;
    font-size: 10px;
    margin-left: 4px;
}

/* Summary */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.summary-card {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.summary-card.warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.summary-card.success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.summary-label {
    font-size: 12px;
    opacity: 0.9;
    margin-bottom: 8px;
}

.summary-value {
    font-size: 32px;
    font-weight: bold;
}

/* Feedback */
.feedback-section,
.task-feedback-section {
    background: var(--background);
    padding: 20px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.feedback-section h3,
.task-feedback-section h3 {
    margin-bottom: 15px;
}

.rating-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

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

.stars {
    display: flex;
    gap: 5px;
}

.star {
    font-size: 24px;
    cursor: pointer;
    color: #ddd;
    transition: color 0.3s ease;
}

.star:hover,
.star.active {
    color: var(--warning-color);
}

.feedback-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feedback-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.feedback-item-info {
    flex: 1;
}

.feedback-item-title {
    font-weight: 500;
}

.feedback-item-times {
    font-size: 12px;
    color: var(--text-secondary);
}

.feedback-item-input {
    width: 80px;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    text-align: center;
}

.feedback-item-actions {
    display: flex;
    gap: 8px;
}

.feedback-item-actions button {
    padding: 6px 10px;
    font-size: 12px;
}

/* Settings */
.settings-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.section {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
}

.setting-item {
    margin-bottom: 15px;
}

.setting-item label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.setting-item input {
    margin-bottom: 8px;
}

/* Client Management */
.client-form {
    display: grid;
    grid-template-columns: 1fr 150px auto;
    gap: 10px;
    margin-bottom: 20px;
}

.client-form input {
    grid-column: 1;
}

.client-form select {
    grid-column: 2;
}

.client-form button {
    grid-column: 3;
    grid-row: 1;
}

.clients-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.client-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.client-item-info {
    flex: 1;
}

.client-name {
    font-weight: 500;
}

.client-category {
    font-size: 12px;
    color: var(--text-secondary);
}

.client-actions {
    display: flex;
    gap: 8px;
}

.client-actions button {
    padding: 6px 10px;
    font-size: 12px;
}

/* Working Hours */
.working-hours-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.day-config {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.day-config label {
    font-weight: 500;
    font-size: 14px;
}

.day-config input {
    padding: 8px;
}

.day-config span {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

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

.modal-content {
    background-color: var(--surface);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    max-width: 400px;
    width: 90%;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-secondary);
}

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

.modal-content h3 {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group label {
    min-width: 80px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    flex: 1;
}

.form-group span {
    color: var(--text-secondary);
}

/* Export Buttons */
.export-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.export-buttons .btn {
    flex: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-button {
        padding: 10px 15px;
        font-size: 12px;
    }

    .input-container,
    .calendar-container,
    .summary-container,
    .settings-container {
        padding: 15px;
    }

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

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

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

    .client-form input {
        grid-column: 1;
    }

    .client-form select {
        grid-column: 1;
    }

    .client-form button {
        grid-column: 1;
    }

    .working-hours-grid {
        grid-template-columns: 1fr;
    }
}

.placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 20px;
}