/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --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);
    --radius: 8px;
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === Header === */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #f3f4f6;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.125rem;
    cursor: pointer;
    padding: 0.375rem;
    border-radius: var(--radius);
    transition: var(--transition);
    opacity: 0.7;
}

.btn-icon:hover {
    opacity: 1;
    background-color: var(--bg-color);
}

.btn-add-lesson {
    width: 100%;
    padding: 1rem;
    margin-top: 0.75rem;
    background-color: var(--card-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-add-lesson:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: #eff6ff;
}

/* === Main === */
.main {
    padding: 2rem 0;
}

/* === Week Section === */
.week-section {
    margin-bottom: 3rem;
}

.week-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.week-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.week-range-input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    background-color: var(--card-bg);
    transition: var(--transition);
}

.week-range-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.week-range-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* === Days Grid === */
.days-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.day-column {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.day-column:hover {
    box-shadow: var(--shadow-md);
}

.day-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.lessons-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* === Lesson Card === */
.lesson-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}

.lesson-card:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.lesson-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.time-separator {
    color: var(--text-secondary);
}

.lesson-content {
    margin-bottom: 0.5rem;
}

.lesson-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.lesson-field {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.lesson-field strong {
    color: var(--text-primary);
    font-weight: 600;
    margin-right: 0.5rem;
}

.lesson-actions {
    display: flex; /* Показываем иконки на карточках */
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

/* Предотвращаем всплытие клика на кнопки внутри карточки */
.lesson-card .btn-icon,
.lesson-card .lesson-actions {
    pointer-events: auto;
}

/* Кнопки действий в модальном окне */
.modal .lesson-actions {
    justify-content: flex-start;
    padding: 1rem 0;
}

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
    position: relative;
}

.modal-large {
    max-width: 700px;
}

.modal-close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

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

.modal h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

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

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="time"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
    background-color: var(--card-bg);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* === Error Container === */
.error-container {
    max-width: 600px;
    margin: 4rem auto;
    padding: 2rem;
    text-align: center;
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.error-container h1 {
    color: var(--danger-color);
    margin-bottom: 1rem;
}

/* === Attachments === */
#attachmentsList {
    margin-bottom: 1rem;
}

.attachment-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
}

.attachment-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.attachment-item button {
    padding: 0.25rem 0.5rem;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.75rem;
}

/* === Animations === */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* === Responsive === */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
    }

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

    .week-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .modal-content {
        padding: 1.5rem;
    }

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

@media (max-width: 480px) {
    .header-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
}