/**
 * Calculations & Formulas Page Styles
 * Modular calculator layout with collapsible sections
 */

/* Main Layout */
.calculations-main {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    margin: 0 0 0.5rem 0;
    font-size: 2rem;
    color: var(--text-primary, #fff);
}

.page-description {
    color: var(--text-secondary, #9ca3af);
    margin: 0 0 1.5rem 0;
}

/* Search and Filter */
.calc-search-bar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.calc-search-bar input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color, #374151);
    border-radius: 8px;
    background: var(--bg-secondary, #1e293b);
    color: var(--text-primary, #fff);
    font-size: 1rem;
}

.calc-search-bar input:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
}

.calc-filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color, #374151);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary, #9ca3af);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--primary-color, #3b82f6);
    color: var(--primary-color, #3b82f6);
}

.filter-btn.active {
    background: var(--primary-color, #3b82f6);
    border-color: var(--primary-color, #3b82f6);
    color: white;
}

/* Calculator Modules Grid */
.calc-modules-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Module Container */
.calc-module {
    background: var(--bg-card, #1e293b);
    border: 1px solid var(--border-color, #374151);
    border-radius: 12px;
    overflow: hidden;
}

.calc-module.hidden {
    display: none;
}

/* Module Header */
.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color, #374151);
    cursor: pointer;
    user-select: none;
    transition: background 0.2s ease;
}

.module-header:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* When filter is NOT "all", disable toggle */
.calc-modules-grid.filter-active .module-header {
    cursor: default;
}

.calc-modules-grid.filter-active .module-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.module-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.module-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.module-title h2 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary, #fff);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Toggle arrow - only visible when "All" filter */
.module-toggle {
    color: var(--text-secondary, #9ca3af);
    transition: transform 0.3s ease;
    font-size: 1rem;
}

/* Hide toggle when filter is active (not "All") */
.calc-modules-grid.filter-active .module-toggle {
    display: none;
}

/* Rotate toggle when collapsed */
.calc-module.collapsed .module-toggle {
    transform: rotate(-90deg);
}

/* Module Content */
.module-content {
    padding: 1rem 1.25rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

/* Hide content when collapsed (only in "All" mode) */
.calc-module.collapsed .module-content {
    display: none;
}

/* Calculator Card */
.calc-card {
    background: var(--bg-secondary, #0f172a);
    border: 1px solid var(--border-color, #374151);
    border-radius: 8px;
    padding: 1rem;
    min-width: 0; /* Prevent overflow */
    overflow: hidden;
    box-sizing: border-box;
    position: relative;
}

.calc-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color, #374151);
}

.calc-card h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary, #fff);
    word-wrap: break-word;
    overflow-wrap: break-word;
    flex: 1;
}

/* Help Button */
.calc-help-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--primary-color, #3b82f6);
    background: transparent;
    color: var(--primary-color, #3b82f6);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    margin-left: 0.5rem;
}

.calc-help-btn:hover {
    background: var(--primary-color, #3b82f6);
    color: white;
    transform: scale(1.1);
}

/* Help Modal */
.calc-help-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    box-sizing: border-box;
}

.calc-help-modal.active {
    display: flex;
}

.calc-help-content {
    background: var(--bg-card, #1e293b);
    border: 1px solid var(--border-color, #374151);
    border-radius: 12px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    padding: 1.5rem;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.calc-help-content h3 {
    margin: 0 0 1rem 0;
    color: var(--primary-color, #3b82f6);
    font-size: 1.3rem;
    padding-right: 2rem;
    border-bottom: none;
}

.calc-help-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    font-size: 1.5rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.calc-help-close:hover {
    background: #ef4444;
    color: white;
}

.calc-help-section {
    margin-bottom: 1.25rem;
}

.calc-help-section h4 {
    color: #4ade80;
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
}

.calc-help-section p,
.calc-help-section li {
    color: var(--text-secondary, #9ca3af);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0.3rem 0;
}

.calc-help-section ul,
.calc-help-section ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.calc-help-formula {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 8px;
    padding: 1rem;
    font-family: monospace;
    font-size: 1rem;
    color: #60a5fa;
    margin: 0.75rem 0;
    text-align: center;
}

.calc-help-example {
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin: 0.75rem 0;
}

.calc-help-example h5 {
    color: #4ade80;
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
}

.calc-help-example p {
    color: var(--text-primary, #fff);
    margin: 0.25rem 0;
}

.calc-help-tip {
    background: rgba(251, 191, 36, 0.1);
    border-left: 3px solid #fbbf24;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    border-radius: 0 8px 8px 0;
}

.calc-help-tip p {
    color: #fbbf24;
    margin: 0;
}

/* Input Groups */
.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0; /* Prevent overflow */
}

.input-group label {
    font-size: 0.8rem;
    color: var(--text-secondary, #9ca3af);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.input-group input,
.input-group select {
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--border-color, #374151);
    border-radius: 6px;
    background: var(--bg-card, #1e293b);
    color: var(--text-primary, #fff);
    font-size: 0.85rem;
    width: 100%;
    box-sizing: border-box;
    min-width: 0; /* Prevent overflow */
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
}

/* Results */
.calc-results {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 6px;
    color: var(--text-primary, #fff);
    display: none;
    word-wrap: break-word;
    overflow-wrap: break-word;
    overflow: hidden;
}

.calc-results.show {
    display: block;
}

.calc-results h4 {
    margin: 0 0 0.4rem 0;
    color: var(--primary-color, #3b82f6);
    font-size: 0.85rem;
}

.calc-results .result-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #4ade80;
    margin: 0.4rem 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.calc-results .result-detail {
    font-size: 0.8rem;
    color: var(--text-secondary, #9ca3af);
    margin: 0.2rem 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.calc-results .result-warning {
    color: #fbbf24;
    font-size: 0.8rem;
    margin-top: 0.4rem;
    padding: 0.4rem;
    background: rgba(251, 191, 36, 0.1);
    border-radius: 4px;
    word-wrap: break-word;
}

.calc-results .result-danger {
    color: #f87171;
    background: rgba(248, 113, 113, 0.1);
}

/* Formula Display */
.calc-formula {
    margin-top: 0.75rem;
    padding: 0.6rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary, #9ca3af);
    font-family: monospace;
    word-wrap: break-word;
    overflow-wrap: break-word;
    overflow: hidden;
}

.calc-formula strong {
    color: var(--text-primary, #fff);
}

/* Warning Text */
.warning-text {
    color: #fbbf24;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: rgba(251, 191, 36, 0.1);
    border-radius: 4px;
}

/* Load Table - Power Calculator */
.load-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    table-layout: auto;
}

.load-table th {
    text-align: left;
    padding: 0.6rem 0.5rem;
    color: var(--text-primary, #fff);
    font-weight: 600;
    font-size: 0.85rem;
    border-bottom: 2px solid var(--border-color, #374151);
    background: rgba(59, 130, 246, 0.1);
}

.load-table td {
    padding: 0.4rem 0.3rem;
    vertical-align: middle;
}

.load-table tbody tr {
    border-bottom: 1px solid var(--border-color, #374151);
}

.load-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.load-table input {
    width: 100%;
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--border-color, #374151);
    border-radius: 6px;
    background: var(--bg-card, #1e293b);
    color: var(--text-primary, #fff);
    font-size: 0.9rem;
    box-sizing: border-box;
}

.load-table input:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
}

.load-table input.load-device {
    min-width: 120px;
}

.load-table input.load-watts,
.load-table input.load-hours,
.load-table input.load-qty {
    min-width: 70px;
    text-align: center;
}

.load-table td:last-child {
    text-align: center;
    width: 50px;
}

.load-table .btn-sm {
    padding: 0.4rem 0.6rem;
    font-size: 1rem;
}

/* Chart Container */
.chart-container {
    margin-top: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 1rem;
    max-height: 300px;
}

/* Quick Conversions */
.quick-conversions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.conversion-group h4 {
    margin: 0 0 0.5rem 0;
    color: var(--primary-color, #3b82f6);
    font-size: 0.9rem;
}

.conversion-group ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.conversion-group li {
    font-size: 0.8rem;
    color: var(--text-secondary, #9ca3af);
    padding: 0.25rem 0;
    font-family: monospace;
}

/* History Section */
.calc-history-section {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-card, #1e293b);
    border: 1px solid var(--border-color, #374151);
    border-radius: 12px;
}

.calc-history-section .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.calc-history-section h2 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--text-primary, #fff);
}

.history-actions {
    display: flex;
    gap: 0.5rem;
}

.history-list {
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.75rem;
    background: var(--bg-secondary, #0f172a);
    border-radius: 6px;
    margin-bottom: 0.5rem;
    border-left: 3px solid var(--primary-color, #3b82f6);
    transition: all 0.2s ease;
}

.history-item:hover {
    background: rgba(59, 130, 246, 0.05);
}

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

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.history-item-type {
    font-weight: 600;
    color: var(--text-primary, #fff);
    font-size: 0.9rem;
}

.history-delete-btn {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary, #9ca3af);
    font-size: 1rem;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.2s;
}

.history-item:hover .history-delete-btn {
    opacity: 1;
}

.history-delete-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.history-item-result {
    color: #4ade80;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.35rem;
}

.history-item-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: 0.35rem;
    margin-bottom: 0.35rem;
}

.history-item-inputs .input-tag {
    display: inline-block;
    background: rgba(59, 130, 246, 0.15);
    color: var(--text-secondary, #9ca3af);
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-family: monospace;
}

.history-item-time {
    color: var(--text-secondary, #9ca3af);
    font-size: 0.7rem;
    margin-top: 0.25rem;
}

.history-more {
    text-align: center;
    color: var(--text-secondary, #9ca3af);
    font-size: 0.8rem;
    padding: 0.5rem;
    font-style: italic;
}

.empty-text {
    color: var(--text-secondary, #9ca3af);
    text-align: center;
    padding: 2rem;
}

/* Responsive - Tablet */
@media (max-width: 992px) {
    .module-content {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    .calculations-main {
        padding: 0.75rem 0;
    }

    .page-header h1 {
        font-size: 1.3rem;
    }

    .page-description {
        font-size: 0.85rem;
    }

    .module-content {
        grid-template-columns: 1fr;
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .module-header {
        padding: 0.75rem;
    }

    .module-title h2 {
        font-size: 1rem;
    }

    .module-icon {
        font-size: 1.25rem;
    }

    .calc-card {
        padding: 0.75rem;
    }

    .calc-card h3 {
        font-size: 0.9rem;
    }

    .calc-filter-buttons {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
    }

    .filter-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
        flex-shrink: 0;
    }

    .input-group label {
        font-size: 0.75rem;
    }

    .input-group input,
    .input-group select {
        padding: 0.4rem 0.5rem;
        font-size: 0.8rem;
    }

    .calc-results .result-value {
        font-size: 1.1rem;
    }

    .calc-results .result-detail {
        font-size: 0.75rem;
    }

    .calc-formula {
        font-size: 0.7rem;
        padding: 0.5rem;
    }

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

    .load-table th {
        font-size: 0.75rem;
        padding: 0.5rem 0.3rem;
    }

    .load-table input {
        padding: 0.4rem;
        font-size: 0.8rem;
    }

    .load-table input.load-device {
        min-width: 80px;
    }

    .load-table input.load-watts,
    .load-table input.load-hours,
    .load-table input.load-qty {
        min-width: 50px;
    }

    /* Help Modal Mobile */
    .calc-help-content {
        max-width: 95%;
        padding: 1rem;
        max-height: 85vh;
    }

    .calc-help-content h3 {
        font-size: 1.1rem;
    }

    .calc-help-section h4 {
        font-size: 0.9rem;
    }

    .calc-help-section p,
    .calc-help-section li {
        font-size: 0.85rem;
    }

    .calc-help-formula {
        font-size: 0.85rem;
        padding: 0.75rem;
    }

    .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }

    .history-actions {
        flex-wrap: wrap;
    }

    .calc-history-section .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .calc-history-section h2 {
        font-size: 1rem;
    }

    .quick-conversions {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .conversion-group h4 {
        font-size: 0.8rem;
    }

    .conversion-group li {
        font-size: 0.7rem;
    }
}

/* Very small screens */
@media (max-width: 400px) {
    .module-content {
        padding: 0.5rem;
    }

    .calc-card {
        padding: 0.6rem;
    }

    .calc-filter-buttons {
        gap: 0.3rem;
    }

    .filter-btn {
        padding: 0.3rem 0.5rem;
        font-size: 0.7rem;
    }

    .quick-conversions {
        grid-template-columns: 1fr;
    }
}

/* Light Theme */
[data-theme="light"] .calc-module {
    background: #fff;
    border-color: #e2e8f0;
}

[data-theme="light"] .module-header:hover {
    background: rgba(0, 0, 0, 0.02);
}

[data-theme="light"] .module-title h2 {
    color: #1e293b;
}

[data-theme="light"] .calc-card {
    background: #f8fafc;
    border-color: #e2e8f0;
}

[data-theme="light"] .calc-card h3 {
    color: #1e293b;
}

[data-theme="light"] .input-group input,
[data-theme="light"] .input-group select {
    background: #fff;
    border-color: #e2e8f0;
    color: #1e293b;
}

[data-theme="light"] .calc-results {
    background: rgba(59, 130, 246, 0.05);
    color: #1e293b;
}

[data-theme="light"] .calc-formula {
    background: rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .calc-history-section {
    background: #fff;
    border-color: #e2e8f0;
}

[data-theme="light"] .history-item {
    background: #f8fafc;
}

[data-theme="light"] .calc-help-content {
    background: #fff;
    border-color: #e2e8f0;
}

[data-theme="light"] .calc-help-section p,
[data-theme="light"] .calc-help-section li {
    color: #475569;
}

[data-theme="light"] .calc-help-example p {
    color: #1e293b;
}

[data-theme="light"] .load-table th {
    color: #1e293b;
    background: rgba(59, 130, 246, 0.08);
}

[data-theme="light"] .load-table input {
    background: #fff;
    border-color: #e2e8f0;
    color: #1e293b;
}

/* Print Styles */
@media print {
    .calc-search-bar,
    .history-actions,
    .module-toggle,
    .btn {
        display: none !important;
    }

    .calc-module {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .module-content {
        display: block !important;
    }

    .calc-card {
        break-inside: avoid;
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }

    .calc-results {
        display: block !important;
        background: #f0f0f0 !important;
        color: #000 !important;
    }
}