:root {
    /* Palette: Onyx & Slate with Cobalt */
    --bg-page: #f8fafc; /* Soft Slate White */
    --bg-panel: #ffffff;
    --text-main: #0f172a; /* Onyx / Deep Navy */
    --text-muted: #64748b;
    --acc-primary: #2563eb; /* Cobalt Blue */
    --acc-primary-soft: #dbeafe;
    --acc-success: #10b981;
    --acc-error: #ef4444;
    --border-color: #e2e8f0;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-ui: 'DM Sans', sans-serif;
    
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-page);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Header UI: Refined Minimalism */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 10%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 1000;
}

.logo {
    display: flex; align-items: center; gap: 0.6rem;
    font-family: var(--font-heading); font-size: 1.75rem; font-weight: 800;
    letter-spacing: -0.02em;
}

.logo-icon { color: var(--acc-primary); }
.tld { color: var(--acc-primary); font-size: 0.75rem; vertical-align: super; font-family: var(--font-ui); font-weight: 700; opacity: 0.8; }

/* Main layout: Professional Grid */
.main-container {
    max-width: 1400px; margin: 0 auto; width: 100%;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 4rem;
    padding: 4rem 5%;
    align-items: start;
}

.editorial-pane { flex: 1; min-width: 0; }
.ad-slot.sidebar { 
    width: 300px; flex-shrink: 0; 
    background: white; border: 1px dashed var(--border-color);
    border-radius: 12px; min-height: 600px; padding: 1rem;
    display: flex; flex-direction: column; align-items: center; justify-content: flex-start;
    color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em;
}

.hero-text { margin-bottom: 5rem; position: relative; }
.hero-text h1 { 
    font-family: var(--font-heading); font-size: clamp(3rem, 5vw, 4.5rem); line-height: 1; margin-bottom: 1.5rem; 
    font-weight: 900; letter-spacing: -0.04em;
}
.hero-text h1 i { font-style: italic; font-weight: 400; color: var(--acc-primary); }
.hero-text p { color: var(--text-muted); font-size: clamp(1rem, 2vw, 1.25rem); max-width: 650px; line-height: 1.6; }

/* Tabs: Architectural Tabs */
.tabs-container { margin-bottom: 4rem; border-bottom: 1px solid var(--border-color); }
.tabs { display: flex; gap: 3rem; }
.tab-btn {
    background: none; border: none; padding-bottom: 1.25rem;
    font-size: 1rem; font-weight: 800; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.05em;
    cursor: pointer; transition: var(--transition-smooth); position: relative;
}
.tab-btn::after {
    content: ''; position: absolute; bottom: -1px; left: 0; width: 0; height: 2px;
    background: var(--acc-primary); transition: var(--transition-smooth);
}
.tab-btn:hover { color: var(--text-main); }
.tab-btn.active { color: var(--acc-primary); }
.tab-btn.active::after { width: 100%; }

/* Tool Sections Transitions */
.tool-section { display: none; transform: translateY(15px); opacity: 0; }
.tool-section.active-tool { display: block; animation: slideReveal var(--transition-smooth) forwards; }
@keyframes slideReveal { to { opacity: 1; transform: translateY(0); } }

.tool-title { font-family: var(--font-heading); font-size: 2.25rem; margin-bottom: 2rem; font-weight: 800; }

/* Forms & Dropzones: Minimal Elevation */
.dropzone {
    border: 2px dashed var(--border-color); padding: 5rem 2rem; text-align: center;
    background: #ffffff; transition: 0.3s ease; border-radius: 16px;
    box-shadow: var(--shadow-sm); cursor: pointer;
}
.dropzone:hover { border-color: var(--acc-primary); background: var(--acc-primary-soft); }
.drop-icon { font-size: 3rem; color: var(--acc-primary); margin-bottom: 2rem; }

.card-bg {
    background: var(--bg-panel); border: 1px solid var(--border-color);
    padding: clamp(1.5rem, 5vw, 3rem); border-radius: 24px; box-shadow: var(--shadow-xl);
    position: relative; overflow: hidden;
}

.input-group { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.75rem; }
label { font-size: 0.75rem; font-weight: 900; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.05em; }
.custom-select, .custom-input {
    border: 1px solid var(--border-color); padding: 1rem 1.25rem; border-radius: 12px; font-size: 1rem;
    background: #f8fafc; transition: 0.2s; color: var(--text-main); font-weight: 500;
}
.custom-select:focus, .custom-input:focus { border-color: var(--acc-primary); outline: none; background: white; box-shadow: 0 0 0 4px var(--acc-primary-soft); }

/* Action Grid: Large Interactive Buttons */
.action-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-top: 1.5rem; margin-bottom: 2.5rem; }
.action-opt {
    background: white; border: 1px solid var(--border-color); padding: 2rem 1rem; border-radius: 20px;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.2rem; cursor: pointer;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1); color: var(--text-muted); font-family: var(--font-ui);
    box-shadow: var(--shadow-sm);
}
.action-opt i { font-size: 2rem; color: var(--text-muted); transition: 0.3s; }
.action-opt span { font-weight: 800; font-size: 0.85rem; text-align: center; line-height: 1.3; text-transform: uppercase; letter-spacing: 0.02em; }
.action-opt:hover { border-color: var(--acc-primary); background: var(--bg-page); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.action-opt:hover i { color: var(--acc-primary); }
.action-opt.active { border-color: var(--acc-primary); background: var(--acc-primary-soft); color: var(--acc-primary); box-shadow: 0 8px 20px rgba(37,99,235,0.15); }
.action-opt.active i { color: var(--acc-primary); transform: scale(1.1); }

/* Format Chips */
.format-chips { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.chip-opt { cursor: pointer; position: relative; }
.chip-opt input { position: absolute; opacity: 0; width: 0; height: 0; }
.chip-opt span {
    display: inline-block; padding: 0.6rem 1.5rem; border-radius: 50px;
    background: #f1f5f9; border: 1px solid var(--border-color);
    font-size: 0.85rem; font-weight: 700; color: var(--text-muted); transition: 0.2s;
}
.chip-opt input:checked + span { background: var(--text-main); color: white; border-color: var(--text-main); box-shadow: var(--shadow-md); }
.chip-opt:hover span { background: #e2e8f0; }

/* Enhanced Previews */
.preview-card {
    background: #f8fafc; border: 1px solid var(--border-color); border-radius: 16px;
    padding: 1.5rem; margin-bottom: 2.5rem; display: flex; align-items: center; gap: 2rem;
}
.preview-thumb {
    width: 120px; height: 160px; background: white; border-radius: 8px;
    box-shadow: var(--shadow-md); overflow: hidden; display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--border-color); flex-shrink: 0;
}
.preview-thumb img { width: 100%; height: 100%; object-fit: cover; }
.preview-info { flex: 1; display: flex; flex-direction: column; gap: 0.4rem; }
.preview-info h4 { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 800; color: var(--text-main); }
.preview-info .meta-tag { font-size: 0.75rem; font-weight: 800; text-transform: uppercase; color: var(--acc-primary); background: var(--acc-primary-soft); padding: 0.2rem 0.6rem; border-radius: 4px; display: inline-block; width: fit-content; }
.preview-info p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.4; }

/* Action Buttons: High Contrast Cobalt */
.btn-primary {
    background: var(--acc-primary); color: white; border: none; padding: 1.25rem;
    font-weight: 800; border-radius: 14px; cursor: pointer; transition: 0.3s cubic-bezier(0.17, 0.67, 0.83, 0.67);
    width: 100%; display: flex; justify-content: center; align-items: center; gap: 1rem;
    box-shadow: 0 8px 20px -6px rgba(37, 99, 235, 0.5);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 25px -6px rgba(37, 99, 235, 0.6); background: #1d4ed8; }
.btn-primary:active { transform: translateY(0); }

.btn-outline {
    background: white; border: 1px solid var(--border-color); padding: 0.75rem 1.5rem;
    border-radius: 10px; cursor: pointer; transition: 0.2s; font-weight: 800;
    text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.05em;
}
.btn-outline:hover { background: #f1f5f9; border-color: var(--text-main); }
.btn-outline.active { background: var(--acc-primary); color: white; border-color: var(--acc-primary); }

/* Status Notifications */
.status-container {
    margin-top: 3rem; padding: 2rem; border-radius: 18px;
    background: white; border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg); animation: slideUp 0.5s ease;
}
@keyframes slideUp { from { opacity:0; transform: translateY(20px); } to { opacity:1; transform: translateY(0); } }

.status-message { font-weight: 800; font-size: 1.1rem; margin-bottom: 1.5rem; color: var(--text-main); }
.status-success { color: var(--acc-success); }
.status-error { color: var(--acc-error); }

.download-btn {
    background: var(--text-main); color: white; padding: 1.2rem 2.5rem; border-radius: 12px;
    text-decoration: none; font-weight: 800; display: inline-flex; align-items: center; gap: 0.8rem;
    transition: 0.3s;
}
.download-btn:hover { background: var(--acc-primary); transform: scale(1.05); }

/* Modals & Editors */
.editor-modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(12px); z-index: 2000;
    display: flex; justify-content: center; align-items: center;
}
.pane-modal {
    background: white; width: 95%; max-width: 1360px; height: 92vh;
    border-radius: 24px; display: flex; flex-direction: column; overflow: hidden;
    box-shadow: var(--shadow-xl); border: 1px solid rgba(255,255,255,0.2);
}
.editor-header { padding: 1.5rem 2.5rem; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); }
.editor-header h2 { font-family: var(--font-heading); font-weight: 900; font-size: 1.5rem; }

.editor-toolbar { 
    padding: 1.25rem 2.5rem; background: #f8fafc; display: flex; gap: 1.5rem; 
    align-items: center; border-bottom: 1px solid var(--border-color);
}

.canvas-container { 
    flex: 1; overflow: hidden; background: #e2e8f0; display: flex; 
    justify-content: center; align-items: center; position: relative;
}

/* Productivity UI elements */
.zoom-controls, .tool-selectors { display: flex; gap: 0.4rem; padding: 0.3rem; background: white; border: 1px solid var(--border-color); border-radius: 12px; }
.zoom-controls button, .tool-selectors button {
    background: transparent; border: none; width: 42px; height: 42px; border-radius: 9px; 
    cursor: pointer; font-size: 1.1rem; color: var(--text-muted); transition: 0.2s;
    display: flex; align-items: center; justify-content: center;
}
.zoom-controls button:hover, .tool-selectors button:hover { background: #f1f5f9; color: var(--text-main); }
.tool-selectors button.active { background: var(--acc-primary); color: white; box-shadow: 0 4px 10px rgba(37,99,235,0.3); }

/* Background pattern */
.checkerboard-bg {
    background-image: 
        linear-gradient(45deg, #f1f5f9 25%, transparent 25%), 
        linear-gradient(-45deg, #f1f5f9 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #f1f5f9 75%), 
        linear-gradient(-45deg, transparent 75%, #f1f5f9 75%);
    background-size: 20px 20px;
}

.loader-ui { color: var(--acc-primary); }

/* Video Trim Timeline: Pro Studio Edition */
.trim-timeline {
    height: 40px; background: #e2e8f0; border-radius: 12px; margin: 3rem 0;
    position: relative; cursor: pointer; border: 1px solid var(--border-color);
    overflow: hidden; box-shadow: inset var(--shadow-sm);
}
.trim-bar { 
    position: absolute; top: 0; height: 100%; 
    background: var(--acc-primary); border: 2px solid white;
    box-shadow: 0 0 15px rgba(37,99,235,0.4);
    opacity: 0.9; z-index: 2; transition: 0.05s;
    cursor: grab;
}
.trim-bar:active { cursor: grabbing; }

/* Timeline Handles for Interaction */
.trim-bar::before, .trim-bar::after {
    content: ''; position: absolute; top: 0;
    width: 20px; height: 100%; z-index: 3;
    cursor: ew-resize;
}
.trim-bar::before { left: -10px; border-left: 4px solid white; border-radius: 12px 0 0 12px; }
.trim-bar::after { right: -10px; border-right: 4px solid white; border-radius: 0 12px 12px 0; }

/* Dark Overlay for Trimmed areas */
.trim-timeline::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.1); z-index: 1;
}

.trim-controls { 
    display: flex; justify-content: space-between; align-items: flex-end; 
    gap: 2rem; margin-top: 1rem; padding: 1.5rem; background: white; 
    border-radius: 20px; box-shadow: var(--shadow-md); border: 1px solid var(--acc-primary-soft);
}
.trim-group { flex: 0 0 200px; display: flex; flex-direction: column; gap: 0.75rem; }
.trim-info { 
    flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
    border-left: 1px solid var(--border-color); border-right: 1px solid var(--border-color);
}
.trim-duration-badge {
    padding: 0.75rem 1.5rem; background: var(--text-main); border-radius: 50px;
    font-size: 0.9rem; font-weight: 900; color: white; box-shadow: var(--shadow-lg);
}
.stepper { display: flex; align-items: center; gap: 0.5rem; }
.step-btn {
    background: white; border: 1px solid var(--border-color); width: 34px; height: 34px;
    border-radius: 8px; cursor: pointer; font-weight: 800; color: var(--text-main);
    display: flex; align-items: center; justify-content: center; transition: 0.2s;
}
.step-btn:hover { background: var(--bg-page); border-color: var(--text-main); }
.custom-input.small { padding: 0.5rem; text-align: center; width: 80px; font-weight: 900; }

/* Image Editor: Pro Controls */
.filter-strip {
    display: flex; gap: 0.75rem; padding: 1rem 2.5rem; background: #f1f5f9;
    border-bottom: 1px solid var(--border-color); overflow-x: auto;
}
.filter-opt {
    padding: 0.5rem 1.25rem; background: white; border: 1px solid var(--border-color);
    border-radius: 50px; cursor: pointer; font-size: 0.8rem; font-weight: 800;
    transition: 0.2s; white-space: nowrap; color: var(--text-muted);
}
.filter-opt:hover { border-color: var(--acc-primary); color: var(--acc-primary); }
.filter-opt.active { background: var(--acc-primary); border-color: var(--acc-primary); color: white; box-shadow: var(--shadow-sm); }

.adj-controls { display: flex; gap: 1.5rem; align-items: center; padding: 0 1rem; }
.adj-group { display: flex; align-items: center; gap: 0.75rem; color: var(--text-muted); }
.adj-group i { font-size: 1.1rem; }
.mini-slider { width: 100px; height: 4px; accent-color: var(--acc-primary); cursor: pointer; }

.divider { width: 1px; height: 30px; background: var(--border-color); margin: 0 0.5rem; }

/* Modal Essentials: Auto-Fit & Visibility */
.editor-modal { z-index: 9999 !important; }
#pdfRenderCanvas, #imageCanvas { 
    display: block; margin: 0 auto; background: white; 
    max-width: 100%; max-height: 70vh; width: auto !important; height: auto !important;
    object-fit: contain; box-shadow: var(--shadow-xl);
}

/* Video Player: Always Compact */
.video-preview-player { 
    border-radius: 12px; border: 1px solid var(--border-color); 
    width: 100%; max-width: 600px;
    max-height: 350px; background: #000; box-shadow: var(--shadow-md); 
    display: block; margin: 0 auto;
}

/* Drawing Cursors */
.canvas-container.signing { cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="black"><path d="M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zM20.71 7.04c.39-.39.39-1.02 0-1.41l-2.34-2.34c-.39-.39-1.02-.39-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z"/></svg>') 0 24, crosshair !important; }

/* Footer & Legal */
.footer {
    text-align: center; padding: 4rem; color: var(--text-muted);
    font-size: 0.9rem; font-weight: 600; border-top: 1px solid var(--border-color);
    background: white;
}
.footer-links { display: flex; justify-content: center; gap: 2rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); text-decoration: none; transition: 0.2s; }
.footer-links a:hover { color: var(--acc-primary); }

/* Ad Containers (CLS Prevention) */
.ad-container {
    background: #f1f5f9; border: 1px dashed var(--border-color);
    display: flex; align-items: center; justify-content: center; border-radius: 12px;
    overflow: hidden; margin-bottom: 2rem;
}
.top-ad, .mobile-ad { grid-column: 1 / -1; width: 100%; margin: 0 auto 3rem auto; }
.top-ad { min-height: 90px; max-width: 728px; }
.mobile-ad { display: none; min-height: 100px; max-width: 320px; }

.ad-placeholder p { font-size: 0.6rem; color: var(--text-muted); letter-spacing: 0.2em; margin-bottom: 0.5rem; text-align: center; }

/* SEO & FAQ Section */
.seo-section { background: white; padding: 6rem 10%; border-top: 1px solid var(--border-color); }
.seo-content { max-width: 900px; margin: 0 auto; }
.seo-content h2 { font-family: var(--font-heading); font-size: 2.5rem; margin-bottom: 2rem; }
.faq-container { margin-top: 4rem; display: grid; gap: 2rem; }
.faq-item h4 { font-weight: 800; margin-bottom: 0.5rem; color: var(--text-main); }
.faq-item p { color: var(--text-muted); line-height: 1.6; }

/* Cookie Banner */
.cookie-banner-ui {
    position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%);
    width: 95%; max-width: 500px; background: white; padding: 1.5rem 2rem;
    border-radius: 20px; box-shadow: var(--shadow-xl); z-index: 3000;
    border: 1px solid var(--acc-primary-soft); animation: slideUp 0.5s cubic-bezier(0.17, 0.67, 0.83, 0.67);
}
.cookie-content { display: flex; flex-direction: column; gap: 1.25rem; }
.cookie-content p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.cookie-actions { display: flex; gap: 0.75rem; }
.cookie-actions .btn-primary { flex: 1; padding: 0.75rem; font-size: 0.85rem; }
.cookie-actions .btn-outline { flex: 1; font-size: 0.85rem; border: 1px solid var(--border-color); }

@media (max-width: 1200px) {
    .main-container { grid-template-columns: 1fr 250px; gap: 2rem; }
}

@media (max-width: 1024px) {
    .main-container { display: flex; flex-direction: column; padding: 3rem 5%; }
    .ad-slot.sidebar { width: 100%; min-height: 250px; order: 3; }
    .hero-text h1 { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    .main-container { padding: 2rem 5%; }
    .editorial-pane { width: 100%; }
    .top-ad { display: none; }
    .mobile-ad { display: flex; }
    .hero-text h1 { font-size: 2.8rem; }
}

/* Scrollbar refine */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-page); }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 10px; border: 2px solid var(--bg-page); }
::-webkit-scrollbar-thumb:hover { background: var(--text-main); }