/* ==========================================================================
   PAGE LAYOUT - MOBILE FIRST
   ========================================================================== */
.page-wrapper {
    max-width: 2200px;
    margin: 0 auto;
    padding: 0;
}

.container {
    max-width: 2200px;
    margin: 0 auto;
    background: var(--card-background);
    border-radius: 8px;
    box-shadow: var(--shadow-light);
    padding: var(--spacing-md);
}

.page-header {
    padding: var(--spacing-md) var(--spacing-sm);
    text-align: center;
    position: relative;
}

.page-header h1 {
    margin-bottom: 0;
    text-align: center;
}

.theme-toggle {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.theme-toggle:focus {
    outline: 3px solid rgba(74, 158, 255, 0.5);
    outline-offset: 2px;
}

.theme-toggle:active {
    transform: scale(0.95);
}

.options-menu {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.options-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.options-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.options-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-xs);
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    min-width: 200px;
    z-index: 1000;
}

.options-dropdown.show {
    display: block;
}

.options-select {
    width: 6rem;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 14px;
    color: #000;
    transition: background-color 0.2s ease;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
}

.dropdown-item:first-child {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.dropdown-item:last-child {
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.dropdown-item span {
    font-size: 16px;
}

.intro-section {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.intro-section h2 {
    margin-top: 0;
}

.intro-section p {
    line-height: 1.7;
}

.intro-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.intro-section a:hover {
    text-decoration: underline;
}

.package-section {
    padding: 0 var(--spacing-sm);
}

.package-section>h2 {
    margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   ACTION BUTTONS
   ========================================================================== */
.action-btn {
    display: inline-block;
    margin: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
    width: auto;
    min-width: 160px;
    max-width: 220px;
}

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

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

#importBtn {
    display: inline-block;
    margin: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
    width: auto;
    min-width: 160px;
    max-width: 220px;
}

#importBtn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-light);
}

/* ==========================================================================
   FORM ELEMENTS
   ========================================================================== */
form {
    margin-bottom: var(--spacing-lg);
}

/* ==========================================================================
   PACKAGE GRID LAYOUT - MOBILE FIRST
   ========================================================================== */
.package-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.main-controls {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.select-all-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    color: #000;
}

.toggle-all-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.toggle-all-btn:hover {
    background-color: var(--hover-bg);
    border-color: var(--primary-color);
}

.toggle-all-btn:focus {
    outline: 3px solid rgba(0, 123, 255, 0.5);
    outline-offset: 2px;
}

#toggleAllIcon {
    transition: transform 0.3s ease;
    font-size: 10px;
}

.toggle-all-btn.collapsed #toggleAllIcon {
    transform: rotate(-90deg);
}

.select-all-checkbox {
    width: 22px;
    height: 22px;
    cursor: pointer;
    transform: scale(1.2);
    min-width: 22px;
    min-height: 22px;
}

#selectAllLabel {
    font-size: 15px;
    color: #000;
    cursor: pointer;
}

[data-theme="dark"] #selectAllLabel {
    color: var(--text-primary);
}

.options-menu-inline {
    position: relative;
    margin-left: auto;
}

.options-btn-inline {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.options-btn-inline:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.options-dropdown-inline {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-xs);
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    min-width: 200px;
    z-index: 1000;
}

.options-dropdown-inline.show {
    display: block;
}

.package-container {
    min-height: 200px;
    position: relative;
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
}

.loading-spinner.hidden {
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-spinner p {
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
}

.error-message {
    padding: var(--spacing-lg);
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: var(--border-radius);
    color: #721c24;
    text-align: center;
}

.error-message button {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.error-message button:hover {
    background-color: var(--primary-hover);
}

.columns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.column {
    flex: 1 1 calc(100% - var(--spacing-sm));
    min-width: 220px;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.category-header:hover {
    background: linear-gradient(135deg, #e0e7ef 0%, #b3c3da 100%);
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .category-header {
    background: linear-gradient(135deg, #3a3a3a 0%, #2a4a6a 100%);
}

[data-theme="dark"] .category-header:hover {
    background: linear-gradient(135deg, #454545 0%, #355070 100%);
}

.category-header:focus {
    outline: 3px solid rgba(0, 123, 255, 0.5);
    outline-offset: 2px;
}

.category-emoji {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .category-emoji {
    background: #404040;
}

.category-header h4 {
    flex: 1;
    margin: 0;
    font-weight: 600;
}

.toggle-arrow {
    font-size: 12px;
    transition: transform 0.3s ease;
    user-select: none;
}

.category.collapsed .toggle-arrow {
    transform: rotate(-90deg);
}

.category-content {
    max-height: 2000px;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.category.collapsed .category-content {
    max-height: 0;
}

.category-checkbox {
    cursor: pointer;
    margin: 0;
    transform: scale(1.2);
}

.column h4,
.column h5 {
    margin: var(--spacing-sm) 0;
    color: var(--text-primary);
}

.column label {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    padding: var(--spacing-xs);
    border-radius: 4px;
    transition: background-color 0.2s ease;
    gap: var(--spacing-sm);
}

.column label:hover {
    background-color: var(--hover-bg);
}

[data-theme="dark"] .column label:hover {
    background-color: #3a3a3a;
}

.column input[type="checkbox"] {
    margin: 0;
    flex-shrink: 0;
}

.column img {
    flex-shrink: 0;
}

/* ==========================================================================
   OPERATING SYSTEM SELECTION - TWO-TIER APPROACH
   ========================================================================== */
.os-selector-container {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.primary-os-selector {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.os-btn {
    padding: var(--spacing-md) var(--spacing-sm);
    background-color: #f8f9fa;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    min-width: 100px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

[data-theme="dark"] .os-btn {
    background-color: #3a3a3a;
    border-color: #555;
}

.os-btn:hover {
    background-color: #e9ecef;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

[data-theme="dark"] .os-btn:hover {
    background-color: #454545;
}

.os-btn:focus {
    outline: 3px solid rgba(0, 123, 255, 0.5);
    outline-offset: 2px;
}

.os-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-hover);
}

.secondary-os-selector {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    padding: var(--spacing-md);
    background: #f8f9fa;
    border-radius: var(--border-radius);
}

[data-theme="dark"] .secondary-os-selector {
    background: #2a2a2a;
}

.secondary-os-selector.hidden {
    display: none;
}

.distro-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: white;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    min-height: 36px;
    white-space: nowrap;
}

[data-theme="dark"] .distro-btn {
    background-color: #3a3a3a;
    color: var(--text-primary);
    border-color: #555;
}

.distro-btn:hover {
    background-color: #e9ecef;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

[data-theme="dark"] .distro-btn:hover {
    background-color: #454545;
}

.distro-btn:focus {
    outline: 2px solid rgba(0, 123, 255, 0.5);
    outline-offset: 2px;
}

.distro-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.secondary-os-selector a {
    color: var(--primary-color);
    text-decoration: none;
}

.secondary-os-selector a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   STICKY COMMAND FOOTER
   ========================================================================== */
.command-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    border-top: 2px solid var(--border-color);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: var(--spacing-sm);
    max-height: 30vh;
    overflow-y: auto;
    background: var(--card-background);
}

[data-theme="dark"] .command-footer {
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
}

.command-container {
    max-width: 2200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.command-output {
    background-color: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.command-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
}

.command-output code {
    padding: var(--spacing-md);
}

[data-theme="dark"] .command-output {
    background-color: #1a1a1a;
    border: 2px solid #404040;
}

.command-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(128, 128, 128, 0.05);
}

[data-theme="dark"] .command-header {
    border-bottom-color: #404040;
    background-color: rgba(128, 128, 128, 0.1);
}

.command-language {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

.copy-btn {
    padding: 6px 12px;
    background-color: rgba(128, 128, 128, 0.15);
    color: var(--text-primary);
    border: 1px solid rgba(128, 128, 128, 0.3);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
    max-width: fit-content;
}

.copy-btn:hover {
    background-color: rgba(128, 128, 128, 0.25);
    border-color: rgba(128, 128, 128, 0.5);
    transform: translateY(-1px);
}

.copy-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.copy-btn:active {
    transform: scale(0.95);
}

.copy-btn.copied {
    background-color: #28a745;
    border-color: #28a745;
    color: white;
}

.command-output code {
    display: block;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 12px;
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.5;
}

.command-warnings {
    display: none;
    background-color: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    color: #856404;
    font-size: 12px;
    max-height: 60px;
    overflow-y: auto;
}

/* Scrollbar styling for command-warnings */
.command-warnings::-webkit-scrollbar {
    width: 6px;
}

.command-warnings::-webkit-scrollbar-track {
    background: transparent;
}

.command-warnings::-webkit-scrollbar-thumb {
    background: rgba(255, 193, 7, 0.5);
    border-radius: 3px;
}

.command-warnings::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 193, 7, 0.7);
}

[data-theme="dark"] .command-warnings {
    background-color: #3a3000;
    border-color: #ffc107;
    color: #ffd54f;
}

.command-warnings.show {
    display: block;
}

.command-warnings strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

/* Padding for body to prevent content under footer */
body {
    padding-bottom: 25vh;
}

/* ==========================================================================
   RESPONSIVE - MOBILE FIRST APPROACH WITH FLEXBOX
   ========================================================================== */

@media (min-width: 480px) {
    .page-header {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .intro-section {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    .package-section {
        padding: 0 var(--spacing-md);
    }

    .package-actions {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
        margin: var(--spacing-lg) 0;
    }

    .action-btn {
        width: calc(50% - var(--spacing-sm));
        min-width: 180px;
        max-width: 250px;
    }

    .os-btn {
        font-size: 16px;
        padding: var(--spacing-sm) var(--spacing-lg);
        min-width: 120px;
    }

    .copy-btn {
        font-size: 12px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .os-selection {
        gap: var(--spacing-lg);
        margin: var(--spacing-lg) 0;
    }

    .os-group {
        padding: var(--spacing-lg);
    }

    .os-title {
        font-size: 17px;
        margin-bottom: var(--spacing-md);
    }

    .action-btn {
        width: auto;
        min-width: 200px;
        max-width: 220px;
    }

    .os-options label {
        font-size: 14px;
    }

    /* Flexbox columns for tablet */
    .column {
        flex: 1 1 calc(50% - var(--spacing-sm));
    }

    .command-footer {
        padding: var(--spacing-md);
    }

    .command-language {
        font-size: 13px;
    }

    .copy-btn {
        font-size: 13px;
        padding: 8px 14px;
    }

    .command-output code {
        font-size: 13px;
    }
}

@media (min-width: 768px) {
    .primary-os-selector {
        flex-wrap: wrap;
    }

    .os-selection {
        gap: var(--spacing-lg);
    }

    .os-title {
        font-size: 18px;
    }

    /* Flexbox columns for small desktop */
    .column {
        flex: 1 1 calc(33.333% - var(--spacing-sm));
    }
}

@media (min-width: 1024px) {
    .command-footer {
        padding: var(--spacing-md);
    }

    .command-language {
        font-size: 14px;
    }

    .copy-btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    .command-output code {
        font-size: 14px;
    }

    body {
        padding-bottom: 30vh;
    }

    /* Flexbox columns grow naturally based on content */
    .column {
        flex: 1 1 calc(25% - var(--spacing-sm));
    }
}

@media (min-width: 1400px) {
    .page-wrapper {
        padding: 0 var(--spacing-lg);
    }

    .page-header {
        padding: var(--spacing-xl) 0;
    }

    .intro-section {
        padding: var(--spacing-xl) 0;
    }

    .package-section {
        padding: 0;
    }

    /* Columns continue to adapt with flexible growth */
    .column {
        flex: 1 1 calc(20% - var(--spacing-sm));
    }

    body {
        max-width: 2200px;
        margin: var(--spacing-xl) auto;
    }
}