/* =====================================================
   HTML-to-XLSX Converter - Retro Professional Theme
   MS-DOS Terminal Inspired Design
   ===================================================== */

/* ============ CSS Variables ============ */
:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-terminal: #001100;
    --color-primary: #00ff00;
    --color-secondary: #00cc00;
    --color-accent: #00ffff;
    --color-warning: #ffff00;
    --color-error: #ff0000;
    --color-text: #00ff00;
    --color-dim: #008800;
    --border-color: #00ff00;
    --font-mono: 'Courier New', Consolas, 'IBM Plex Mono', monospace;
    --scanline-opacity: 0.03;
    --glow-intensity: 0 0 5px var(--color-primary);
}

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

body {
    font-family: var(--font-mono);
    background: var(--bg-primary);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

/* Scanline effect overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 255, 0, var(--scanline-opacity)) 0px,
        transparent 1px,
        transparent 2px,
        rgba(0, 255, 0, var(--scanline-opacity)) 3px
    );
    z-index: 9999;
}

/* ============ Terminal Container ============ */
.terminal-container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--bg-terminal);
    border: 3px solid var(--border-color);
    box-shadow: 
        0 0 20px rgba(0, 255, 0, 0.3),
        inset 0 0 100px rgba(0, 255, 0, 0.05);
    padding: 30px;
    position: relative;
}

/* Terminal header bar */
.terminal-container::before {
    content: '█ HTML-TO-XLSX.EXE';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    background: var(--border-color);
    color: var(--bg-primary);
    padding: 5px 15px;
    font-weight: bold;
    font-size: 14px;
    letter-spacing: 1px;
}

/* ============ Header Section ============ */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.ascii-title {
    font-size: 32px;
    line-height: 1.2;
    margin-bottom: 15px;
    color: var(--color-primary);
    text-shadow: var(--glow-intensity);
    letter-spacing: 4px;
    font-weight: bold;
    font-family: var(--font-mono);
}

.tagline {
    color: var(--color-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.version {
    color: var(--color-dim);
    font-size: 12px;
}

/* ============ Input Method Selector ============ */
.input-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
}

.selector-btn {
    background: transparent;
    border: 2px solid var(--color-dim);
    color: var(--color-dim);
    padding: 10px 30px;
    font-family: var(--font-mono);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.selector-btn:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.selector-btn.active {
    border-color: var(--color-primary);
    color: var(--bg-primary);
    background: var(--color-primary);
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.5);
    font-weight: bold;
}

/* ============ Input Areas ============ */
.input-area {
    display: none;
    margin-bottom: 30px;
}

.input-area.active {
    display: block;
}

.input-label {
    display: block;
    margin-bottom: 10px;
    color: var(--color-accent);
    font-size: 14px;
}

.input-label::before {
    content: '> ';
}

/* File Upload Area */
.file-upload-zone {
    border: 2px dashed var(--border-color);
    padding: 40px;
    text-align: center;
    background: rgba(0, 255, 0, 0.02);
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload-zone:hover {
    background: rgba(0, 255, 0, 0.05);
    border-color: var(--color-accent);
}

.file-upload-zone.drag-over {
    background: rgba(0, 255, 0, 0.1);
    border-color: var(--color-accent);
    border-style: solid;
}

#htmlFile {
    display: none;
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
}

.upload-text {
    color: var(--color-secondary);
    margin-bottom: 10px;
}

.upload-hint {
    color: var(--color-dim);
    font-size: 12px;
}

.file-info {
    margin-top: 20px;
    padding: 15px;
    background: rgba(0, 255, 0, 0.05);
    border: 1px solid var(--color-secondary);
    display: none;
}

.file-info.show {
    display: block;
}

/* HTML Paste Area */
.paste-container {
    position: relative;
}

#htmlPaste {
    width: 100%;
    min-height: 300px;
    background: rgba(0, 255, 0, 0.02);
    border: 2px solid var(--border-color);
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 15px;
    resize: vertical;
    outline: none;
}

#htmlPaste:focus {
    background: rgba(0, 255, 0, 0.05);
    border-color: var(--color-accent);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.2);
}

#htmlPaste::placeholder {
    color: var(--color-dim);
}

.char-counter {
    text-align: right;
    margin-top: 5px;
    color: var(--color-dim);
    font-size: 12px;
}

.paste-actions {
    margin-top: 10px;
}

/* ============ Action Buttons ============ */
.action-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    justify-content: center;
}

.btn {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--color-primary);
    padding: 12px 40px;
    font-family: var(--font-mono);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.btn::before {
    content: '[ ';
}

.btn::after {
    content: ' ]';
}

.btn:hover {
    background: var(--color-primary);
    color: var(--bg-primary);
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.5);
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    border-color: var(--color-dim);
    color: var(--color-dim);
}

.btn:disabled:hover {
    background: transparent;
    color: var(--color-dim);
    box-shadow: none;
}

.btn-secondary {
    border-color: var(--color-dim);
    color: var(--color-dim);
}

.btn-secondary:hover {
    background: var(--color-dim);
    color: var(--bg-primary);
}

/* ============ Status/Output Section ============ */
.status-section {
    min-height: 100px;
    margin-bottom: 30px;
}

.status-output {
    background: rgba(0, 255, 0, 0.02);
    border: 2px solid var(--color-dim);
    padding: 20px;
    min-height: 80px;
}

.status-line {
    margin-bottom: 8px;
    font-size: 13px;
}

.status-line::before {
    content: '$ ';
    color: var(--color-accent);
}

.status-ready {
    color: var(--color-primary);
}

.status-processing {
    color: var(--color-warning);
}

.status-error {
    color: var(--color-error);
}

.status-info {
    color: var(--color-accent);
}

/* Blinking cursor effect */
.cursor-blink {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Download section */
.download-section {
    margin-top: 20px;
    padding: 20px;
    background: rgba(0, 255, 255, 0.05);
    border: 2px solid var(--color-accent);
    display: none;
}

.download-section.show {
    display: block;
}

.download-link {
    display: inline-block;
    color: var(--color-accent);
    text-decoration: none;
    padding: 10px 20px;
    border: 2px solid var(--color-accent);
    margin-top: 10px;
    transition: all 0.2s;
}

.download-link:hover {
    background: var(--color-accent);
    color: var(--bg-primary);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

/* Table selection UI */
.table-selection {
    background: rgba(0, 255, 0, 0.02);
    border: 2px solid var(--color-secondary);
    padding: 20px;
    margin-top: 20px;
    display: none;
}

.table-selection.show {
    display: block;
}

.table-option {
    padding: 10px;
    margin: 10px 0;
    border: 1px solid var(--color-dim);
    cursor: pointer;
    transition: all 0.2s;
}

.table-option:hover {
    background: rgba(0, 255, 0, 0.05);
    border-color: var(--color-secondary);
}

.table-option input[type="checkbox"] {
    margin-right: 10px;
}

/* ============ Footer ============ */
.footer {
    text-align: center;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
    color: var(--color-dim);
    font-size: 12px;
}

.footer a {
    color: var(--color-secondary);
    text-decoration: none;
}

.footer a:hover {
    color: var(--color-accent);
    text-shadow: var(--glow-intensity);
}

/* ============ Responsive Design ============ */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .terminal-container {
        padding: 20px 15px;
    }

    .terminal-container::before {
        font-size: 12px;
        padding: 4px 10px;
    }

    .ascii-title {
        font-size: 20px;
        letter-spacing: 2px;
        margin-bottom: 10px;
    }

    .tagline {
        font-size: 11px;
    }

    .version {
        font-size: 10px;
    }

    .input-selector {
        flex-direction: column;
        gap: 8px;
    }

    .selector-btn {
        padding: 12px 20px;
        font-size: 12px;
        width: 100%;
    }

    .file-upload-zone {
        padding: 30px 15px;
    }

    .upload-icon {
        font-size: 36px;
    }

    .upload-text {
        font-size: 13px;
    }

    .upload-hint {
        font-size: 11px;
    }

    #htmlPaste {
        min-height: 200px;
        font-size: 12px;
        padding: 10px;
    }

    .action-controls {
        flex-direction: column;
        gap: 10px;
    }

    .btn {
        width: 100%;
        padding: 14px 30px;
        font-size: 13px;
    }

    .status-output {
        padding: 15px;
    }

    .status-line {
        font-size: 12px;
        word-break: break-word;
    }

    .footer {
        font-size: 10px;
    }

    .footer p {
        margin-bottom: 5px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }

    .terminal-container {
        padding: 15px 10px;
        border-width: 2px;
    }

    .terminal-container::before {
        font-size: 10px;
        padding: 3px 8px;
    }

    .ascii-title {
        font-size: 16px;
        letter-spacing: 1px;
        line-height: 1;
    }

    .tagline {
        font-size: 10px;
    }

    .version {
        font-size: 9px;
    }

    .input-label {
        font-size: 12px;
    }

    .file-upload-zone {
        padding: 20px 10px;
    }

    .upload-icon {
        font-size: 30px;
        margin-bottom: 10px;
    }

    .upload-text {
        font-size: 12px;
    }

    .upload-hint {
        font-size: 10px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 12px;
    }

    .status-output {
        padding: 12px;
    }

    .char-counter {
        font-size: 11px;
    }
}

/* ============ Utility Classes ============ */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}