:root {
    --bg-primary: #0f111a;
    --bg-secondary: #1a1d2d;
    --accent: #4ade80;
    --accent-hover: #22c55e;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(26, 29, 45, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    overflow: hidden; /* App feels native */
}

/* Dynamic App Background Layer */
.app-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background-size: cover;
    background-position: center;
    transition: background 0.5s ease;
}

.app-container {
    display: flex;
    height: 100vh;
    padding: 1rem;
    gap: 1.5rem;
}

/* Glassmorphism Panel Utility */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

/* Sidebar Styling */
.sidebar {
    width: 380px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}
.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 10px;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-header p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

.controls-wrapper {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.control-group.last-group {
    border-bottom: none;
}

.control-group h3 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
}

textarea {
    width: 100%;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.8rem;
    color: var(--text-main);
    font-size: 0.9rem;
    resize: vertical;
    outline: none;
    transition: border 0.3s;
}

textarea:focus {
    border-color: var(--accent);
}

.btn {
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: rgba(255,255,255,0.1);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}

.btn-primary:hover {
    background: rgba(255,255,255,0.2);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--text-muted);
    color: var(--text-muted);
}

.btn-secondary:hover {
    color: var(--text-main);
    border-color: var(--text-main);
}

.btn-accent {
    background: var(--accent);
    color: #000;
    font-size: 1.1rem;
    padding: 0.8rem;
}

.btn-accent:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(74, 222, 128, 0); }
    100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

.flex-row {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.flex-spaced {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

input[type="color"] {
    appearance: none;
    -webkit-appearance: none;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    background: none;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 2px solid var(--glass-border);
    border-radius: 8px;
}

.input-field {
    width: 100%;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 0.6rem;
    border-radius: 8px;
    outline: none;
}

.styled-select {
    appearance: none;
    cursor: pointer;
}

/* File Upload Button */
.file-upload-btn {
    cursor: pointer;
    text-align: center;
    flex-grow: 1;
}

/* Styling Panel Options */
.style-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.slider-group {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.85rem;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.color-picker-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
}

.toggle-group {
    display: flex;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    overflow: hidden;
}

.style-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.6rem;
    cursor: pointer;
    transition: 0.2s;
}

.style-btn:hover {
    color: var(--text-main);
    background: rgba(255,255,255,0.1);
}

.style-btn.active {
    background: var(--accent);
    color: #000;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
}

/* Main Preview Area */
.preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    border-radius: 16px;
    overflow: hidden;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    z-index: 10;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
}

.dot.active {
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    font-size: 1.2rem;
    transition: transform 0.2s;
}

.icon-btn:hover {
    transform: rotate(45deg);
}

/* Video Frame Setup (6:18 ratio = 1:3) */
.video-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0,0,0,0.5); /* Canvas surrounding */
}

.video-frame {
    /* 6:18 ratio is equivalent to 1:3 width:height */
    /* Mobile sizes ~ 300x900 or 360x1080 */
    width: 320px;
    height: 960px;
    background-color: #1a1a2e; /* default solid */
    background-size: cover;
    background-position: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    position: relative;
    overflow: hidden;
    transition: background 0.3s;
}

/* Text Element inside the video */
.text-element {
    position: absolute;
    cursor: grab;
    padding: 0.5rem 1rem;
    user-select: none;
    line-height: 1.2;
    transition: border 0.2s;
    border: 2px dashed transparent;
    white-space: pre-wrap;
    text-align: center;
    transform-origin: center center;
}

.text-element:active {
    cursor: grabbing;
}

.text-element.selected {
    border: 2px dashed var(--accent);
}

/* Resizer Handle */
.resizer {
    width: 12px;
    height: 12px;
    background: var(--accent);
    position: absolute;
    bottom: -6px;
    right: -6px;
    border-radius: 50%;
    cursor: nwse-resize;
    display: none;
}

.text-element.selected .resizer {
    display: block;
}

/* UI Panel Disabler */
.disabled-panel {
    opacity: 0.5;
    pointer-events: none;
}

/* Text Effects */
.effect-none { text-shadow: none; }
.effect-glow { text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px var(--accent), 0 0 40px var(--accent); }
.effect-shadow { text-shadow: 4px 4px 5px rgba(0,0,0,0.7); }
.effect-outline { 
    -webkit-text-stroke: 1px black; 
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,
    -1px  1px 0 #000,
     1px  1px 0 #000;
}
.effect-blur { filter: blur(2px); }
.effect-glitch { animation: glitch 1s linear infinite; }
@keyframes glitch {
    2%, 64% { transform: translate(2px,0) skew(0deg); }
    4%, 60% { transform: translate(-2px,0) skew(0deg); }
    62% { transform: translate(0,0) skew(5deg); }
}
.effect-3d {
    text-shadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0,0,0,.1), 0 0 5px rgba(0,0,0,.1), 0 1px 3px rgba(0,0,0,.3), 0 3px 5px rgba(0,0,0,.2), 0 5px 10px rgba(0,0,0,.25), 0 10px 10px rgba(0,0,0,.2), 0 20px 20px rgba(0,0,0,.15);
}

.tab-btn {
    flex: 1;
    border-radius: 0;
}
.tab-btn.active {
    background: var(--accent);
    color: #000;
}

/* Overlay */
.overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.9);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
}

.overlay.hidden {
    display: none;
}

.loader-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255,255,255,0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

.progress-bar {
    width: 300px;
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: var(--accent);
    transition: width 0.1s linear;
}

/* Animations Presets (injected via JS usually or added as classes) */
.anim-fade { animation: fade 1s ease-in-out forwards; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.anim-slide { animation: slideUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
@keyframes slideUp { from { transform: translateY(100px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.anim-zoom { animation: zoomIn 1s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
@keyframes zoomIn { from { transform: scale(0.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.anim-bounce { animation: bounce 1s cubic-bezier(0.28, 0.84, 0.42, 1) forwards; }
@keyframes bounce { 
    0% { transform: translateY(-200px); opacity: 0; }
    50% { transform: translateY(20px); opacity: 1; }
    75% { transform: translateY(-10px); }
    100% { transform: translateY(0); opacity: 1;}
}

.anim-typewriter { 
    overflow: hidden; 
    white-space: nowrap; 
    border-right: 2px solid #fff; 
    animation: typing 2s steps(40, end), blink-caret .75s step-end infinite; 
}
@keyframes typing { from { width: 0 } to { width: 100% } }
@keyframes blink-caret { from, to { border-color: transparent } 50% { border-color: #fff; } }