/* style.css - Clean, high-performance UI styling for HTML Nexus formatter */
:root {
    /* Theme: Dark Slate (Default) */
    --bg-main: #090d16;
    --bg-panel: #0f172a;
    --bg-sub: #1e293b;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-sub: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
    --accent-glow: rgba(14, 165, 233, 0.15);
    --success: #10b981;
    --success-hover: #059669;
    --danger: #f43f5e;
    --danger-hover: #e11d48;
    --warning: #f59e0b;
    --shadow: 0 4px 10px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2);
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="cyberpunk"] {
    --bg-main: #0b0514;
    --bg-panel: #140b24;
    --bg-sub: #25123e;
    --border-color: #ff007f;
    --text-main: #39ff14;
    --text-sub: #ff00ff;
    --primary: #ff007f;
    --primary-hover: #ff3399;
    --accent: #00ffff;
    --accent-hover: #33ffff;
    --accent-glow: rgba(0, 255, 255, 0.15);
    --success: #39ff14;
    --success-hover: #2ee610;
    --danger: #ff3333;
    --danger-hover: #cc0000;
    --warning: #ffff00;
}

[data-theme="light"] {
    --bg-main: #f1f5f9;
    --bg-panel: #ffffff;
    --bg-sub: #f8fafc;
    --border-color: #cbd5e1;
    --text-main: #0f172a;
    --text-sub: #64748b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --accent-glow: rgba(59, 130, 246, 0.08);
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #d97706;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: background-color 0.25s, color 0.25s;
}

/* Scrollbar customization */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* HEADER LAYOUT */
header {
    height: 60px;
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
    box-shadow: var(--shadow);
    flex-shrink: 0;
}

.logo-block {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-badge {
    background-color: var(--primary);
    color: white;
    padding: 6px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--text-main) 40%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-version {
    font-size: 0.65rem;
    font-weight: 700;
    background-color: var(--success);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    -webkit-text-fill-color: initial;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* TOOLBAR & BUTTONS */
.btn {
    background-color: var(--bg-sub);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    user-select: none;
}

.btn:hover {
    background-color: var(--border-color);
    border-color: var(--text-sub);
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

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

.btn-accent {
    background-color: var(--accent);
    border-color: var(--accent);
    color: white;
}

.btn-accent:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-success {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
}

.btn-success:hover {
    background-color: var(--success-hover);
    border-color: var(--success-hover);
}

.btn-icon {
    padding: 8px;
    border-radius: 6px;
}

.theme-selector {
    display: flex;
    background-color: var(--bg-sub);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2px;
}

.theme-tab {
    background: none;
    border: none;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-sub);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 4px;
}

.theme-tab.active {
    background-color: var(--primary);
    color: white;
}

/* APP WORKSPACE LAYOUT */
.app-container {
    flex-grow: 1;
    display: flex;
    overflow: hidden;
    height: calc(100vh - 60px);
}

/* SIDEBAR PANEL */
.sidebar {
    width: 320px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
    transition: width 0.3s ease;
}

.sidebar.collapsed {
    width: 0;
    overflow: hidden;
    border-right: none;
}

.sidebar-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-section:last-child {
    border-bottom: none;
}

.section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-sub);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-group {
    margin-bottom: 14px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.control-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
}

.control-desc {
    font-size: 0.7rem;
    color: var(--text-sub);
    margin-top: -4px;
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    background-color: var(--bg-sub);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-input:focus {
    border-color: var(--primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input {
    accent-color: var(--primary);
    width: 15px;
    height: 15px;
}

/* MAIN CONTENT SPLIT */
.main-workspace {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-main);
    position: relative;
}

/* PANELS WRAPPER */
.editor-workspace {
    flex-grow: 1;
    display: flex;
    overflow: hidden;
    height: 65%; /* Shared with preview drawer at bottom */
    position: relative;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-panel);
    position: relative;
}

.panel-left {
    border-right: 1px solid var(--border-color);
}

/* PANEL HEADER */
.panel-header {
    height: 45px;
    background-color: var(--bg-sub);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    flex-shrink: 0;
    user-select: none;
}

.panel-title {
    font-size: 0.85rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-main);
}

.panel-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* TAB SELECTORS */
.tab-btn {
    background: none;
    border: none;
    color: var(--text-sub);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn.active {
    background-color: var(--bg-panel);
    color: var(--text-main);
    box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

/* EDITOR WINDOW & LINE NUMBERS */
.editor-container {
    flex-grow: 1;
    position: relative;
    overflow: hidden;
    display: flex;
}

.line-numbers {
    width: 48px;
    background-color: var(--bg-sub);
    border-right: 1px solid var(--border-color);
    padding: 12px 0;
    text-align: right;
    padding-right: 12px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-sub);
    user-select: none;
    overflow-y: hidden;
    line-height: 1.5;
}

.code-textarea {
    flex-grow: 1;
    background-color: transparent;
    color: var(--text-main);
    border: none;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.5;
    resize: none;
    outline: none;
    overflow-y: auto;
    white-space: pre;
    tab-size: 4;
}

/* Pre-formatted Highlighted code output */
.code-pre-rendered {
    flex-grow: 1;
    background-color: transparent;
    color: var(--text-main);
    border: none;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.5;
    overflow-y: auto;
    white-space: pre;
    outline: none;
    margin: 0;
    user-select: text;
}

/* HIGHLIGHTING CLASSES */
.token-tag { color: var(--danger); font-weight: 600; }
.token-attr-name { color: var(--accent); }
.token-attr-value { color: var(--success); }
.token-comment { color: var(--text-sub); font-style: italic; }
.token-content { color: var(--text-main); }
.token-doctype { color: var(--warning); font-weight: bold; }

/* FILE DRAG AND DROP DROPZONE */
.dropzone-overlay {
    position: absolute;
    inset: 8px;
    background-color: rgba(15, 23, 42, 0.95);
    border: 2px dashed var(--primary);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 100;
    cursor: pointer;
    transition: all 0.2s ease;
}

[data-theme="light"] .dropzone-overlay {
    background-color: rgba(255, 255, 255, 0.95);
}

.dropzone-overlay:hover, .dropzone-overlay.dragover {
    border-color: var(--accent);
    background-color: rgba(99, 102, 241, 0.05);
}

.dropzone-icon {
    color: var(--primary);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.dropzone-title {
    font-size: 1rem;
    font-weight: 700;
}

.dropzone-desc {
    font-size: 0.75rem;
    color: var(--text-sub);
}

/* FILE ATTACHED BANNER */
.file-loaded-bar {
    background-color: var(--accent-glow);
    border: 1px solid var(--accent);
    padding: 8px 12px;
    border-radius: 6px;
    margin: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
}

.file-loaded-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* INTERACTIVE PREVIEW DRAWER (BOTTOM PANEL) */
.preview-drawer {
    height: 35%;
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    transition: height 0.3s ease;
    z-index: 10;
}

.preview-drawer.collapsed {
    height: 40px;
}

.preview-header {
    height: 40px;
    background-color: var(--bg-sub);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    cursor: pointer;
    user-select: none;
    flex-shrink: 0;
}

.preview-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 700;
}

.preview-header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.preview-badge {
    font-size: 0.65rem;
    background-color: var(--primary);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: bold;
}

.preview-content {
    flex-grow: 1;
    overflow: hidden;
    display: flex;
}

/* IFRAME LIVE VIEW */
.preview-iframe-wrapper {
    flex: 1;
    height: 100%;
    background-color: white; /* Always default web canvas render */
    position: relative;
    display: flex;
}

.preview-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background-color: white;
}

/* DIAGNOSTICS & AUDIT TAB */
.diagnostics-wrapper {
    flex: 1;
    height: 100%;
    overflow-y: auto;
    padding: 16px;
    display: none;
}

.diagnostics-wrapper.active {
    display: block;
}

.diagnostics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.diagnostic-card {
    background-color: var(--bg-sub);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
}

.card-title {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}

.audit-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.75rem;
}

.audit-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.4;
}

.audit-status {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.audit-status.ok { color: var(--success); }
.audit-status.warn { color: var(--warning); }
.audit-status.err { color: var(--danger); }

/* FOOTER STATUS BAR */
.status-bar {
    height: 30px;
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    font-size: 0.75rem;
    color: var(--text-sub);
    flex-shrink: 0;
    user-select: none;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

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

.status-val {
    font-weight: 700;
    color: var(--text-main);
}

/* DRAGGABLE PANEL SPLITTER */
.panel-splitter {
    width: 4px;
    background-color: var(--border-color);
    cursor: col-resize;
    position: relative;
    z-index: 20;
    transition: background-color 0.2s;
}

.panel-splitter:hover, .panel-splitter.dragging {
    background-color: var(--primary);
}

/* NOTIFICATION TOAST */
.toast {
    position: fixed;
    bottom: 45px;
    right: 20px;
    background-color: var(--success);
    color: white;
    padding: 10px 18px;
    border-radius: 6px;
    box-shadow: var(--shadow);
    z-index: 1000;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.error {
    background-color: var(--danger);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* MODAL STRUCTURE */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 520px;
    max-width: 90%;
    padding: 24px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.25s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-body {
    margin-bottom: 20px;
    line-height: 1.5;
    font-size: 0.85rem;
    color: var(--text-sub);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* RESPONSIVE LAYOUT OVERRIDES */
@media (max-width: 950px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .editor-workspace {
        flex-direction: column;
        height: 50%;
    }
    .panel-splitter {
        display: none;
    }
    .panel-left {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .preview-drawer {
        height: 35%;
    }
}