/* Стили для секции этапов проектирования */
#design-stages {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.design-stages-container {
    max-width: 1920px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Навигация по этапам (табы) */
.stages-nav {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    border-bottom: 1px solid #e0e0e0;
    flex-wrap: wrap;
}

.stage-tab {
    background: none;
    border: none;
    padding: 15px 25px;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    border-bottom: 3px solid transparent;
}

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

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

/* Контент этапов */
.stages-content {
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.stage-panel {
    display: none;
    padding: 40px;
}

.stage-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.stage-panel h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.stage-panel h4 {
    font-size: 1.4rem;
    color: var(--dark);
    margin: 25px 0 15px;
}

.stage-panel h5 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 10px;
}

/* Сетка оборудования */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.equipment-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 25px;
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.equipment-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary);
}

.equipment-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.equipment-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.equipment-item p {
    color: var(--gray);
    line-height: 1.5;
}

/* Списки расчетов и документации */
.calculation-list,
.documentation-list {
    margin: 25px 0;
}

.calculation-item,
.doc-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 8px;
    transition: var(--transition);
}

.calculation-item:hover,
.doc-item:hover {
    background: #f8f9fa;
}

.calculation-icon,
.doc-icon {
    font-size: 1.5rem;
    color: var(--primary);
    margin-right: 15px;
    min-width: 40px;
    text-align: center;
}

.calculation-text h5,
.doc-text h5 {
    margin-top: 0;
}

/* Сетка планировки */
.layout-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.layout-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: var(--transition);
}

.layout-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.layout-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.layout-text h4 {
    margin-top: 0;
}

/* Примечания этапов */
.stage-note {
    background: #e8f4fd;
    border-left: 4px solid var(--primary);
    padding: 15px 20px;
    margin-top: 30px;
    border-radius: 0 8px 8px 0;
}

.stage-note p {
    margin: 0;
    color: var(--dark);
}

/* Добавить в CSS */
.stage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.stage-text {
    display: flex;
    flex-direction: column;
}

.stage-image {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.stage-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Адаптивность 1600px */
@media (max-width: 1600px) {
    .design-stages-container {
        max-width: 1400px;
        padding: 0 30px;
    }
    
    .stage-panel {
        padding: 35px 30px;
    }
    
    .equipment-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .layout-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 20px;
    }
    
    .stage-grid {
        gap: 40px;
    }
    
    .stage-tab {
        padding: 14px 20px;
        font-size: 15px;
    }
}

/* Адаптивность 1200px */
@media (max-width: 1200px) {
    .stage-panel {
        padding: 30px 25px;
    }
    
    .stages-nav {
        flex-direction: row;
        overflow-x: auto;
        justify-content: flex-start;
        border-bottom: 1px solid #e0e0e0;
        padding-bottom: 5px;
        margin-bottom: 30px;
    }
    
    .stage-tab {
        border-bottom: 3px solid transparent;
        border-left: none;
        text-align: center;
        margin-bottom: 0;
        border-radius: 0;
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .stage-tab.active {
        border-left-color: transparent;
        border-bottom-color: var(--primary);
        background: none;
    }
    
    .equipment-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .layout-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .stage-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .stage-image {
        order: -1;
    }
}

/* Адаптивность 992px */
@media (max-width: 992px) {
    .stage-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .stage-image {
        order: -1;
    }
    
    .stage-panel {
        padding: 25px 20px;
    }
    
    .equipment-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 15px;
    }
    
    .layout-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 15px;
    }
    
    .stage-tab {
        padding: 12px 18px;
        font-size: 14px;
    }
    
    .calculation-item,
    .doc-item {
        padding: 12px;
        margin-bottom: 15px;
    }
    
    .calculation-icon,
    .doc-icon {
        font-size: 1.3rem;
        margin-right: 12px;
        min-width: 35px;
    }
}

/* Адаптивность 768px */
@media (max-width: 768px) {
    #design-stages {
        padding: 60px 0;
    }
    
    .design-stages-container {
        padding: 0 10px;
    }
    
    .stage-panel {
        padding: 20px 15px;
    }
    
    .stage-panel h3 {
        font-size: 1.5rem;
    }
    
    .stage-panel h4 {
        font-size: 1.3rem;
    }
    
    .equipment-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        margin: 20px 0;
    }
    
    .equipment-item {
        padding: 20px 15px;
    }
    
    .layout-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        margin: 20px 0;
    }
    
    .layout-item {
        padding: 15px;
    }
    
    /* ИСПРАВЛЕНИЕ: оставляем иконки в ряд */
    .calculation-item,
    .doc-item {
        display: flex;
        align-items: flex-start;
        margin-bottom: 15px;
        padding: 15px 10px;
        text-align: left;
    }
    
    .calculation-icon,
    .doc-icon {
        margin-right: 15px;
        margin-bottom: 0;
        font-size: 1.3rem;
        min-width: 35px;
    }
    
    .stages-nav {
        margin-bottom: 25px;
    }
    
    .stage-tab {
        padding: 12px 15px;
        font-size: 14px;
    }
}

/* Адаптивность 420px */
@media (max-width: 420px) {
    #design-stages {
        padding: 40px 0;
    }
    
    .stage-panel {
        padding: 15px 10px;
    }
    
    .stage-panel h3 {
        font-size: 1.4rem;
        margin-bottom: 15px;
    }
    
    .stage-panel h4 {
        font-size: 1.2rem;
        margin: 20px 0 12px;
    }
    
    .equipment-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin: 15px 0;
    }
    
    .equipment-item {
        padding: 15px 12px;
        margin-bottom: 0;
    }
    
    .equipment-icon {
        font-size: 2rem;
        margin-bottom: 12px;
    }
    
    .layout-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin: 15px 0;
    }
    
    .layout-item {
        padding: 12px;
    }
    
    .layout-icon {
        font-size: 2rem;
        margin-bottom: 12px;
    }
    
    /* ИСПРАВЛЕНИЕ: оставляем иконки в ряд */
    .calculation-item,
    .doc-item {
        display: flex;
        align-items: flex-start;
        padding: 12px 8px;
        margin-bottom: 12px;
        text-align: left;
    }
    
    .calculation-icon,
    .doc-icon {
        margin-right: 12px;
        margin-bottom: 0;
        font-size: 1.2rem;
        min-width: 30px;
    }
    
    .stage-note {
        padding: 12px 15px;
        margin-top: 20px;
    }
    
    .stages-nav {
        margin-bottom: 20px;
    }
    
    .stage-tab {
        padding: 10px 12px;
        font-size: 13px;
    }
}

@media (max-width: 360px) {
    .stage-panel {
        padding: 12px 8px;
    }
    
    .stage-panel h3 {
        font-size: 1.3rem;
    }
    
    .stage-panel h4 {
        font-size: 1.1rem;
    }
    
    .equipment-item {
        padding: 12px 10px;
    }
    
    .layout-item {
        padding: 10px;
    }
    
    .stage-tab {
        padding: 8px 10px;
        font-size: 12px;
    }
    
    .calculation-item,
    .doc-item {
        padding: 10px 6px;
        margin-bottom: 10px;
    }
    
    .calculation-icon,
    .doc-icon {
        margin-right: 10px;
        font-size: 1.1rem;
        min-width: 25px;
    }
}