/* Monochromatic Black/White Spatial Architecture */
:root {
    --bg-dark-deep: #000000;
    --bg-dark-surface: #09090b;
    --bg-card: #141416;
    --bg-card-hover: #1c1c1e;
    --border-subtle: rgba(255, 255, 255, 0.07);
    --border-focus: rgba(255, 255, 255, 0.25);
    
    --text-main: #ffffff;
    --text-muted: #cbd5e1; 
    --text-dark-label: #94a3b8;
    
    --accent-solid: #ffffff;
    --danger-color: #ef4444;
    
    --radius-pill: 100px;
    --radius-xl: 24px;
    --radius-lg: 14px;
    --radius-md: 10px;
    
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-sans);
    user-select: none;
    outline: none;
}

body {
    background-color: var(--bg-dark-deep);
    color: var(--text-main);
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

/* UI Keyframe Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.03); }
    50% { box-shadow: 0 0 30px 4px rgba(255, 255, 255, 0.06); }
    100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.03); }
}

.animate-fade-in { animation: fadeIn 0.5s ease-out forwards; }
.animate-slide-up { animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.animate-slide-up-delayed { animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both; }
.animate-fade-in-delayed { animation: fadeIn 0.6s ease-out 0.3s both; }

/* Viewport Logic */
.view-section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: none;
    z-index: 2;
    opacity: 0;
    transition: var(--transition-smooth);
}
.view-section.active {
    display: flex;
    flex-direction: column;
    opacity: 1;
    z-index: 3;
}

/* Landing Layout */
#landing-page {
    padding: 40px;
    justify-content: space-between;
}
.landing-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
.logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.5px;
}
.logo .thin { font-weight: 300; color: var(--text-dark-label); }
.nav-tag {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    color: var(--text-dark-label);
}

.landing-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
.hero-text .badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 20px;
}
.hero-text h1 {
    font-family: var(--font-display);
    font-size: 3.4rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}
.hero-text p { color: var(--text-muted); font-size: 1.05rem; line-height: 1.6; }

/* Dropzone Interface */
.mega-drop-zone {
    background: var(--bg-dark-surface);
    border: 2px dashed rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    padding: 8px;
    cursor: pointer;
    animation: pulseGlow 4s infinite ease-in-out;
    transition: var(--transition-smooth);
}
.mega-drop-zone.dragover { border-color: #ffffff; box-shadow: 0 0 40px rgba(255, 255, 255, 0.08); transform: scale(1.01); }
.drop-zone-inner {
    border-radius: calc(var(--radius-xl) - 6px);
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.icon-wrapper {
    width: 74px;
    height: 74px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 24px;
    transition: var(--transition-smooth);
}
.mega-drop-zone h2 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 8px; }
.mega-drop-zone p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 28px; }

.browse-btn {
    background: var(--text-main);
    color: var(--bg-dark-deep);
    border: none;
    padding: 12px 28px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}
.browse-btn-landing:hover { transform: translateY(-2px); box-shadow: 0 10px 20px rgba(255,255,255,0.15); }
.mega-drop-zone:hover .icon-wrapper { background: #ffffff; color: #000000; transform: scale(1.05); }

.landing-footer { display: flex; justify-content: center; gap: 16px; width: 100%; }
.feature-pill {
    background: rgba(255,255,255,0.01);
    border: 1px solid var(--border-subtle);
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    color: var(--text-dark-label);
    display: flex;
    align-items: center;
    gap: 8px;
}
.credits-pill {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--text-main);
}
.credit-name { letter-spacing: 0.5px; color: var(--text-main); }

/* Studio Container Architecture */
.studio-container {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100%;
    flex: 1;
    overflow: hidden;
}

/* Studio Environment Frame */
.sidebar {
    width: 380px;
    background: var(--bg-dark-surface);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    padding: 24px;
    flex-shrink: 0;
    height: 100%;
}
.sidebar-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }

/* Navigation Tab UI Matrix */
.tab-nav {
    display: flex;
    background: #000000;
    padding: 4px;
    border-radius: var(--radius-md);
    gap: 4px;
    margin-bottom: 28px;
    border: 1px solid var(--border-subtle);
}
.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-dark-label);
    padding: 10px 4px;
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: calc(var(--radius-md) - 4px);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}
.tab-btn i { font-size: 1rem; color: var(--text-dark-label); }
.tab-btn:hover { color: var(--text-main); }
.tab-btn:hover i { color: var(--text-main); }
.tab-btn.active { background: var(--bg-card); color: var(--text-main); font-weight: 600; }
.tab-btn.active i { color: var(--text-main); }

.tab-content-container { flex: 1; overflow-y: auto; padding-right: 2px; }
.tab-pane { display: none; animation: paneFadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.tab-pane.active { display: block; }
@keyframes paneFadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.tab-pane h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; margin-bottom: 4px; }
.panel-subtitle { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 20px; line-height: 1.4; }

/* Component Cards */
.action-list { display: flex; flex-direction: column; gap: 10px; }
.action-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 14px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    text-align: left;
    transition: var(--transition-smooth);
}
.action-card:hover { background: var(--bg-card-hover); border-color: var(--border-focus); transform: translateX(2px); }

/* OPTIMIZATION: White crisp icons for optimal legibility */
.card-icon {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-main); 
}
.action-card:hover .card-icon { background: rgba(255, 255, 255, 0.1); }

.card-text { display: flex; flex-direction: column; }
.card-text strong { font-size: 0.85rem; font-weight: 500; color: var(--text-main); }
.card-text span { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; line-height: 1.4; }

/* Dynamic Vector Track Lists */
.layer-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }
.layer-item {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 12px 14px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition-smooth);
}
.layer-item:hover { background: var(--bg-card-hover); }
.layer-item.active { border-color: #ffffff; background: rgba(255, 255, 255, 0.03); font-weight: 600; }

/* OPTIMIZATION: White icons inside layer list */
.layer-item i { color: var(--text-main); font-size: 0.9rem; }

.context-controls { background: #050507; border: 1px solid var(--border-subtle); padding: 18px; border-radius: var(--radius-lg); }
.context-controls h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 14px; color: var(--text-dark-label); }

/* Field Configurations */
.control-group { margin-bottom: 16px; display: flex; flex-direction: column; }
.control-group label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 6px; display: flex; justify-content: space-between; }
.control-group label span { color: var(--text-main); font-family: monospace; }

.premium-input, .premium-select {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    padding: 10px 12px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}
.premium-input:focus, .premium-select:focus { border-color: var(--border-focus); }
.premium-color-picker { -webkit-appearance: none; border: none; width: 100%; height: 34px; border-radius: var(--radius-md); cursor: pointer; background: transparent; }
.premium-color-picker::-webkit-color-swatch-wrapper { padding: 0; }
.premium-color-picker::-webkit-color-swatch { border: 1px solid var(--border-subtle); border-radius: var(--radius-md); }

/* System Linear Sliders */
input[type=range] { -webkit-appearance: none; width: 100%; background: transparent; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; height: 14px; width: 14px; border-radius: 50%; background: var(--text-main); cursor: pointer; margin-top: -5px; }
input[type=range]::-webkit-slider-runnable-track { width: 100%; height: 4px; background: rgba(255,255,255,0.06); border-radius: 2px; }

/* Control Interfaces */
.primary-pill-btn { background: var(--text-main); color: var(--bg-dark-deep); border: none; padding: 12px; border-radius: var(--radius-pill); font-weight: 600; font-size: 0.85rem; cursor: pointer; width: 100%; display: flex; justify-content: center; align-items: center; gap: 8px; transition: var(--transition-smooth); }
.primary-pill-btn:hover { background: #e4e4e7; transform: translateY(-1px); }
.secondary-pill-btn { background: transparent; color: var(--text-main); border: 1px solid var(--border-subtle); padding: 12px; border-radius: var(--radius-pill); font-weight: 600; font-size: 0.85rem; cursor: pointer; width: 100%; display: flex; justify-content: center; align-items: center; gap: 8px; transition: var(--transition-smooth); }
.secondary-pill-btn:hover { background: rgba(255,255,255,0.03); border-color: var(--border-focus); }
.export-button-stack { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }

.danger-btn { background: transparent; color: var(--danger-color); border: 1px solid rgba(239,68,68,0.2); padding: 10px; border-radius: var(--radius-md); font-size: 0.75rem; font-weight: 500; cursor: pointer; width: 100%; margin-top: 6px; transition: var(--transition-smooth); }
.danger-btn:hover { background: rgba(239,68,68,0.06); border-color: var(--danger-color); }

.circle-btn, .text-link-btn { background: transparent; border: none; color: var(--text-dark-label); width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition-smooth); }
.circle-btn:hover, .text-link-btn:hover { background: rgba(255,255,255,0.04); color: var(--text-main); }
.circle-btn.active { color: #000000; background: #ffffff; }
.circle-btn i, .text-link-btn i { color: var(--text-main); } /* Bright white navigation/history action icons */

/* Workspace Canvas Structure */
.workspace { 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
    background: var(--bg-dark-deep); 
    overflow: hidden;
    height: 100%;
}
.workspace-header {
    height: 64px; 
    border-bottom: 1px solid var(--border-subtle); 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 0 24px;
    flex-shrink: 0;
}
.history-actions { display: flex; gap: 6px; }
.canvas-meta { font-family: monospace; font-size: 0.75rem; color: var(--text-dark-label); background: rgba(255,255,255,0.02); padding: 6px 12px; border-radius: var(--radius-pill); border: 1px solid var(--border-subtle); }

.canvas-viewport {
    flex: 1; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    padding: 32px; 
    position: relative; 
    background-image: radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px); 
    background-size: 24px 24px;
    overflow: hidden;
}

canvas#main-render {
    max-width: 100%; 
    max-height: 100%; 
    width: auto;
    height: auto;
    object-fit: contain;
    cursor: grab; 
    border-radius: var(--radius-md); 
    box-shadow: 0 24px 70px rgba(0,0,0,0.85); 
    border: 1px solid var(--border-subtle);
    display: block;
}
canvas#main-render:active { cursor: grabbing; }

.mt-2 { margin-top: 8px; }