/* HTML Challenge Styles - Cyberpunk Purple Theme with Light/Dark Mode */

/* CSS Variables for Theming */
:root {
    --bg-gradient-start: #7c3aed;
    --bg-gradient-end: #0f0820;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-text: #333;
    --editor-bg: #1e1e1e;
    --editor-text: #d4d4d4;
    --line-numbers-bg: #252525;
    --line-numbers-text: #858585;
    --accent-purple: #7c3aed;
    --accent-blue: #00d9ff;
    --border-color: #7c3aed;
    --snippet-bg: rgba(124, 58, 237, 0.1);
    --snippet-border: #7c3aed;
}

[data-theme="light"] {
    --bg-gradient-start: #f0f0f0;
    --bg-gradient-end: #e0e0e0;
    --text-primary: #333;
    --text-secondary: #666;
    --card-bg: #ffffff;
    --card-text: #333;
    --editor-bg: #ffffff;
    --editor-text: #333;
    --line-numbers-bg: #f5f5f5;
    --line-numbers-text: #999;
    --accent-purple: #7c3aed;
    --accent-blue: #0099cc;
    --border-color: #7c3aed;
    --snippet-bg: #f8f8f8;
    --snippet-border: #d0d0d0;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Main Content */
main {
    flex: 1;
    padding: 20px 0;
}

.challenge-container {
    max-width: 100%;
    padding-bottom: 40px;
}
header {
    padding: 20px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.logo a {
    display: block;
    line-height: 0;
    position: relative;
    filter: drop-shadow(0 0 15px rgba(124, 58, 237, 0.5));
    transition: filter 0.3s ease;
}

.logo a:hover {
    filter: drop-shadow(0 0 25px rgba(124, 58, 237, 0.8));
}

.logo-icon {
    width: 180px;
    height: auto;
    max-width: 100%;
    position: relative;
    z-index: 1;
}

/* Theme Toggle */
.theme-toggle {
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: absolute;
    right: 0;
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.5);
}

.theme-icon::before {
    content: '☀';
    font-size: 24px;
}

[data-theme="light"] .theme-icon::before {
    content: '☾';
}

/* Main Content */
main {
    flex: 1;
    padding: 20px 0;
}

.challenge-container {
    max-width: 100%;
}

.challenge-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-purple);
    text-align: center;
    margin-bottom: 16px;
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px rgba(124, 58, 237, 0.5);
}

[data-theme="light"] .challenge-title {
    text-shadow: none;
}

/* Cyberpunk Glitch Effect */
.glitch {
    position: relative;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    display: inline-block;
    padding: 4px 12px;
    background: rgba(124, 58, 237, 0.1);
}

[data-theme="dark"] .glitch {
    color: #fff;
    text-shadow: 
        0 0 10px rgba(124, 58, 237, 0.8),
        2px 0 0 rgba(0, 217, 255, 0.5),
        -2px 0 0 rgba(255, 0, 255, 0.5);
}

[data-theme="light"] .glitch {
    color: var(--accent-purple);
    text-shadow: 
        2px 0 0 rgba(0, 217, 255, 0.6),
        -2px 0 0 rgba(255, 0, 255, 0.6);
    background: rgba(124, 58, 237, 0.05);
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 4px 12px;
    opacity: 0.8;
}

.glitch::before {
    left: 2px;
    text-shadow: -2px 0 var(--accent-blue);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: 2px 0 #ff00ff;
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim2 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% {
        clip: rect(31px, 9999px, 94px, 0);
        transform: skew(0.4deg);
    }
    5% {
        clip: rect(70px, 9999px, 71px, 0);
        transform: skew(0.1deg);
    }
    10% {
        clip: rect(67px, 9999px, 85px, 0);
        transform: skew(0.8deg);
    }
    15% {
        clip: rect(14px, 9999px, 33px, 0);
        transform: skew(0.2deg);
    }
    20% {
        clip: rect(26px, 9999px, 40px, 0);
        transform: skew(0.5deg);
    }
    25% {
        clip: rect(86px, 9999px, 88px, 0);
        transform: skew(0.3deg);
    }
    30% {
        clip: rect(85px, 9999px, 66px, 0);
        transform: skew(0.6deg);
    }
    35% {
        clip: rect(8px, 9999px, 96px, 0);
        transform: skew(0.1deg);
    }
    40% {
        clip: rect(95px, 9999px, 98px, 0);
        transform: skew(0.7deg);
    }
    45% {
        clip: rect(76px, 9999px, 77px, 0);
        transform: skew(0.2deg);
    }
    50% {
        clip: rect(54px, 9999px, 27px, 0);
        transform: skew(0.4deg);
    }
    55% {
        clip: rect(39px, 9999px, 15px, 0);
        transform: skew(0.9deg);
    }
    60% {
        clip: rect(17px, 9999px, 20px, 0);
        transform: skew(0.3deg);
    }
    65% {
        clip: rect(94px, 9999px, 11px, 0);
        transform: skew(0.5deg);
    }
    70% {
        clip: rect(28px, 9999px, 87px, 0);
        transform: skew(0.1deg);
    }
    75% {
        clip: rect(88px, 9999px, 82px, 0);
        transform: skew(0.6deg);
    }
    80% {
        clip: rect(65px, 9999px, 29px, 0);
        transform: skew(0.2deg);
    }
    85% {
        clip: rect(43px, 9999px, 73px, 0);
        transform: skew(0.8deg);
    }
    90% {
        clip: rect(99px, 9999px, 5px, 0);
        transform: skew(0.4deg);
    }
    95% {
        clip: rect(1px, 9999px, 61px, 0);
        transform: skew(0.7deg);
    }
    100% {
        clip: rect(52px, 9999px, 36px, 0);
        transform: skew(0.1deg);
    }
}

@keyframes glitch-anim2 {
    0% {
        clip: rect(65px, 9999px, 100px, 0);
        transform: skew(0.5deg);
    }
    5% {
        clip: rect(52px, 9999px, 74px, 0);
        transform: skew(0.2deg);
    }
    10% {
        clip: rect(79px, 9999px, 85px, 0);
        transform: skew(0.7deg);
    }
    15% {
        clip: rect(25px, 9999px, 9px, 0);
        transform: skew(0.3deg);
    }
    20% {
        clip: rect(33px, 9999px, 95px, 0);
        transform: skew(0.6deg);
    }
    25% {
        clip: rect(47px, 9999px, 61px, 0);
        transform: skew(0.1deg);
    }
    30% {
        clip: rect(10px, 9999px, 22px, 0);
        transform: skew(0.8deg);
    }
    35% {
        clip: rect(71px, 9999px, 44px, 0);
        transform: skew(0.4deg);
    }
    40% {
        clip: rect(89px, 9999px, 56px, 0);
        transform: skew(0.2deg);
    }
    45% {
        clip: rect(3px, 9999px, 18px, 0);
        transform: skew(0.9deg);
    }
    50% {
        clip: rect(60px, 9999px, 35px, 0);
        transform: skew(0.5deg);
    }
    55% {
        clip: rect(84px, 9999px, 92px, 0);
        transform: skew(0.1deg);
    }
    60% {
        clip: rect(19px, 9999px, 50px, 0);
        transform: skew(0.7deg);
    }
    65% {
        clip: rect(42px, 9999px, 68px, 0);
        transform: skew(0.3deg);
    }
    70% {
        clip: rect(77px, 9999px, 6px, 0);
        transform: skew(0.6deg);
    }
    75% {
        clip: rect(91px, 9999px, 81px, 0);
        transform: skew(0.2deg);
    }
    80% {
        clip: rect(58px, 9999px, 13px, 0);
        transform: skew(0.8deg);
    }
    85% {
        clip: rect(24px, 9999px, 97px, 0);
        transform: skew(0.4deg);
    }
    90% {
        clip: rect(36px, 9999px, 72px, 0);
        transform: skew(0.1deg);
    }
    95% {
        clip: rect(63px, 9999px, 45px, 0);
        transform: skew(0.5deg);
    }
    100% {
        clip: rect(7px, 9999px, 99px, 0);
        transform: skew(0.2deg);
    }
}

.challenge-description {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Code Snippets Section */
.code-snippets {
    margin-bottom: 40px;
}

.code-snippets h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent-purple);
    margin-bottom: 20px;
    font-family: 'Courier New', monospace;
}

.snippets-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.snippet-card {
    background: var(--card-bg);
    padding: 16px;
    border: 2px solid var(--snippet-border);
    transition: all 0.3s ease;
    width: 100%;
}

.snippet-card:hover {
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
}

.snippet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 10px;
}

.snippet-label {
    font-weight: 600;
    color: var(--accent-purple);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 200px;
}

.snippet-label label {
    cursor: pointer;
    user-select: none;
    color: var(--accent-purple);
}

.snippet-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-purple);
    flex-shrink: 0;
}

.copy-btn {
    background: var(--accent-purple);
    color: white;
    border: none;
    padding: 6px 16px;
    font-size: 13px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: #9f67ff;
    box-shadow: 0 0 15px rgba(124, 58, 237, 0.5);
}

.copy-btn.copied {
    background: #00d9ff;
}

.snippet-code {
    background: var(--snippet-bg);
    padding: 12px;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: var(--card-text);
    overflow-x: auto;
    white-space: pre;
    border: 1px solid var(--snippet-border);
}

/* Editor Section */
.editor-section {
    margin-bottom: 40px;
}

.editor-section h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent-purple);
    margin-bottom: 20px;
    font-family: 'Courier New', monospace;
}

/* Editor Controls */
.editor-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.control-btn {
    background: linear-gradient(135deg, var(--accent-purple), #9333ea);
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    font-family: 'Inter', sans-serif;
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
    background: linear-gradient(135deg, #9333ea, var(--accent-purple));
}

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

.tool-link {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.tool-link:visited {
    color: white;
}

.file-input {
    display: none;
}

.editor-container {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    overflow: hidden;
}

.editor-header {
    background: var(--line-numbers-bg);
    padding: 10px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.editor-title {
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    color: var(--card-text);
    font-weight: 500;
}

.clear-btn {
    background: transparent;
    border: 1px solid var(--accent-purple);
    color: var(--accent-purple);
    padding: 6px 16px;
    font-size: 13px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: all 0.3s ease;
}

.clear-btn:hover {
    background: var(--accent-purple);
    color: white;
}

/* CodeMirror Styling */
.CodeMirror {
    height: 500px;
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    line-height: 1.5;
}

[data-theme="dark"] .CodeMirror {
    background: #1e1e1e;
    color: #d4d4d4;
}

[data-theme="light"] .CodeMirror {
    background: #ffffff;
    color: #333;
}

.CodeMirror-gutters {
    background: var(--line-numbers-bg);
    border-right: 1px solid var(--border-color);
}

.CodeMirror-linenumber {
    color: var(--line-numbers-text);
    padding: 0 8px;
}

.preview-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-purple), #9f67ff);
    color: white;
    border: none;
    padding: 16px 32px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
    margin-top: 20px;
}

.preview-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(124, 58, 237, 0.6);
}

/* Preview Container */
.preview-container {
    margin-top: 40px;
    background: var(--card-bg);
    padding: 20px;
    border: 2px solid var(--border-color);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.preview-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent-purple);
    font-family: 'Courier New', monospace;
}

.close-preview {
    background: transparent;
    border: 1px solid var(--accent-purple);
    color: var(--accent-purple);
    padding: 8px 20px;
    font-size: 14px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: all 0.3s ease;
}

.close-preview:hover {
    background: var(--accent-purple);
    color: white;
}

.preview-frame-container {
    background: white;
    border: 2px solid var(--border-color);
    overflow: visible;
}

.preview-frame {
    width: 100%;
    min-height: 800px;
    border: none;
    display: block;
    transform-origin: top left;
    overflow: visible;
}

/* Keyboard Shortcuts Section */
.shortcuts-section {
    margin-top: 60px;
    padding: 30px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    color: var(--card-text);
}

.shortcuts-section h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-purple);
    text-align: center;
    margin-bottom: 30px;
    font-family: 'Courier New', monospace;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.shortcut-category {
    background: var(--snippet-bg);
    padding: 20px;
    border-left: 4px solid var(--accent-purple);
}

.shortcut-category h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-purple);
    margin-bottom: 15px;
    font-family: 'Inter', sans-serif;
}

.shortcut-item {
    padding: 8px 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--card-text);
}

.shortcut-item .os {
    font-weight: 600;
    color: var(--accent-purple);
    min-width: 80px;
}

.shortcut-item code {
    background: rgba(124, 58, 237, 0.1);
    padding: 4px 8px;
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    color: var(--accent-purple);
    font-weight: 600;
    border: 1px solid var(--accent-purple);
}

[data-theme="light"] .shortcut-item code {
    background: rgba(124, 58, 237, 0.15);
}

.shortcut-item .desc {
    color: var(--text-secondary);
    font-style: italic;
    font-size: 13px;
}

/* Footer */
footer {
    padding: 20px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    body {
        min-height: auto;
    }

    .container {
        padding: 0 10px;
        min-height: auto;
    }

    main {
        padding: 15px 0;
    }

    .challenge-container {
        padding-bottom: 20px;
    }

    footer {
        padding: 15px 0;
        margin-top: 20px;
    }

    header {
        padding: 15px 0;
    }

    .logo-icon {
        width: 140px;
    }

    .theme-toggle {
        width: 45px;
        height: 45px;
    }

    .theme-icon::before {
        font-size: 20px;
    }

    .challenge-title {
        font-size: 28px;
    }

    .challenge-description {
        font-size: 16px;
        padding: 0 10px;
    }

    .code-snippets h2,
    .editor-section h2,
    .preview-header h2 {
        font-size: 20px;
    }

    .snippets-grid {
        gap: 15px;
    }

    .snippet-code {
        font-size: 12px;
    }

    .editor-wrapper {
        max-height: 400px;
    }

    .code-editor {
        font-size: 13px;
    }

    .line-numbers {
        font-size: 13px;
        min-width: 40px;
        padding: 16px 8px;
    }

    .preview-btn {
        font-size: 16px;
        padding: 14px 24px;
    }

    .preview-frame {
        min-height: 500px;
    }
    
    .preview-frame-container {
        overflow: visible;
    }    .preview-container {
        padding: 15px;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 8px;
    }

    main {
        padding: 10px 0;
    }

    .challenge-container {
        padding-bottom: 15px;
    }

    footer {
        padding: 12px 0;
    }

    .logo-icon {
        width: 120px;
    }

    .challenge-title {
        font-size: 24px;
    }

    .challenge-description {
        font-size: 14px;
    }

    .snippet-code {
        font-size: 11px;
        padding: 10px;
    }

    .editor-header {
        padding: 8px 12px;
    }

    .editor-title {
        font-size: 12px;
    }

    .clear-btn {
        font-size: 12px;
        padding: 5px 12px;
    }

    .code-editor {
        font-size: 12px;
        padding: 12px;
    }

    .line-numbers {
        font-size: 12px;
        padding: 12px 6px;
    }

    .preview-frame {
        min-height: 400px;
    }
    
    .preview-frame-container {
        overflow: visible;
    }    .preview-container {
        padding: 10px;
    }

    .preview-header {
        margin-bottom: 15px;
    }

    .preview-header h2 {
        font-size: 18px;
    }

    .close-preview {
        font-size: 13px;
        padding: 6px 14px;
    }

    .shortcuts-section {
        margin-top: 40px;
        padding: 20px;
    }

    .shortcuts-section h3 {
        font-size: 22px;
    }

    .shortcuts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .shortcut-category {
        padding: 15px;
    }

    .shortcut-item {
        font-size: 13px;
    }

    .shortcut-item .os {
        min-width: 70px;
    }

    .shortcut-item code {
        font-size: 12px;
    }
}