:root {
    --bg-app: #0f172a;
    --bg-controls: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;

    /* Gradients */
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
    --gradient-2: linear-gradient(135deg, #3b82f6 0%, #2dd4bf 100%);
    --gradient-3: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-4: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-main);
    overflow: hidden;
    height: 100vh;
}

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden; /* Keep sidebar fixed */
}

/* Controls Sidebar */
.controls {
    width: 420px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    overflow-y: auto;
    box-shadow: 20px 0 50px rgba(0,0,0,0.3);
}

header .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.control-group {
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.control-group h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-wrapper label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.input-wrapper input, .input-wrapper textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 14px;
    color: white;
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.input-wrapper input:focus, .input-wrapper textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
    background: rgba(0, 0, 0, 0.5);
}

textarea {
    resize: none;
    height: 80px;
}

.btn-primary {
    background: var(--gradient-2);
    color: #fff;
    border: none;
    border-radius: 12px;
    padding: 16px;
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(45, 212, 191, 0.2);
    transition: transform 0.1s, opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

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

.format-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.format-btn {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 10px 5px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.format-btn svg {
    width: 16px;
    height: 16px;
}

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

.format-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: black;
}

.control-row {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.bg-presets {
    display: flex;
    gap: 10px;
}

.bg-preset {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
}

.bg-preset.active {
    border-color: white;
}

.logo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.logo-item {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 8px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.logo-item img {
    max-width: 100%;
    max-height: 100%;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

.logo-item:hover { border-color: var(--accent); }
.logo-item.active { border-color: var(--accent); background: rgba(56, 189, 248, 0.1); }

.watermark-logo {
    position: absolute;
    bottom: 40px;
    right: 40px;
    max-width: 120px;
    height: auto;
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.3));
    z-index: 10;
    pointer-events: none;
    display: none;
}

.watermark-logo.active { display: block; }

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

details {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    padding: 4px 12px;
}

summary {
    cursor: pointer;
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.manual-post {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
    padding-top: 8px;
    border-top: 1px solid var(--glass-border);
}

.manual-post p {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
}

.btn-export {
    background: #fff;
    color: #000;
    border: none;
    border-radius: var(--radius-sm);
    padding: 16px;
    font-weight: 800;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

/* Preview Area */
.preview-area {
    flex: 1;
    background-color: #020617;
    background-image: 
        radial-gradient(circle at 2px 2px, rgba(255,255,255,0.05) 1px, transparent 0);
    background-size: 40px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
    overflow: auto; /* Allow large containers during export */
}

.capture-container {
    box-shadow: 0 40px 100px rgba(0,0,0,0.6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 600px; /* Base width */
    height: auto;
    min-height: 400px;
    transition: all 0.4s ease;
    overflow: hidden;
    position: relative;
    background: var(--bg-app);
}

/* Manageable Sizes for Export (will be upscaled by pixelRatio) */
.ratio-auto { width: 600px; height: auto; }
.ratio-1-1  { width: 800px; height: 800px; }
.ratio-4-5  { width: 800px; height: 1000px; }
.ratio-9-16 { width: 700px; height: 1244px; }
.ratio-4-3  { width: 1000px; height: 750px; }

.frame-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 0.3s ease;
}

.frame {
    background: #000;
    border-radius: 40px;
    padding: 48px;
    width: 850px; 
    height: auto;
    border: 2px solid rgba(255,255,255,0.15);
    box-shadow: 0 40px 80px rgba(0,0,0,0.6);
    display: flex;
    flex-direction: column;
    gap: 16px;
    backdrop-filter: blur(20px);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%); /* Centered absolutely */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Specific adjustments for Story format to look premium */
.ratio-9-16 .frame {
    width: 95%;
    max-width: none;
    padding: 40px 32px;
}

.ratio-9-16 .tweet-content {
    font-size: 1.4rem;
    line-height: 1.4;
}

.ratio-4-3 .frame {
    width: 80%;
}

.tweet-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tweet-header {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #334155;
    background-size: cover;
    background-position: center;
    border: 1px solid rgba(255,255,255,0.1);
}

.user-info .name {
    font-weight: 700;
    font-size: 1.4rem; /* Increased */
}

.user-info .handle {
    color: #71767b;
    font-size: 1.2rem; /* Increased */
}

.x-logo {
    position: absolute;
    right: 0;
    top: 0;
}

.x-logo svg {
    width: 20px;
    height: 20px;
    fill: #fff;
}

.tweet-content {
    font-size: 1.6rem; /* Increased from 1.15rem */
    line-height: 1.4;
    color: #e7e9ea;
    white-space: pre-wrap;
}

.connection-line {
    width: 3px;
    height: 32px;
    background: #4b5563; /* Brighter gray */
    margin-left: 21px;
    border-radius: 2px;
}

.reply-block .tweet-content {
    font-size: 1.5rem;
}

.tweet-media {
    margin-top: 12px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.1);
    display: none; /* Hidden if empty */
}

.tweet-media img {
    width: 100%;
    display: block;
    object-fit: contain;
    max-height: 400px;
    border-radius: var(--radius-sm);
}

/* Compact media for vertical threads */
.ratio-9-16 .tweet-media img,
.ratio-4-5 .tweet-media img {
    max-height: 250px;
}

.tweet-media.active {
    display: block;
}

/* Background gradients */
.gradient-1 { background: var(--gradient-1); }
.gradient-2 { background: var(--gradient-2); }
.gradient-3 { background: var(--gradient-3); }
.gradient-4 { background: var(--gradient-4); }
.solid-dark { background: #111; }

/* Responsiveness & Mobile Support */
@media (max-width: 1024px) {
    body {
        overflow: auto;
        height: auto;
    }
    
    .app-container {
        flex-direction: column;
        height: auto;
        overflow: visible;
    }
    
    .controls {
        width: 100%;
        order: 2;
        border-right: none;
        border-top: 1px solid var(--glass-border);
        padding: 24px 20px;
        box-shadow: 0 -20px 50px rgba(0,0,0,0.4);
    }
    
    .preview-area {
        order: 1;
        padding: 40px 15px;
        min-height: 500px;
        background-attachment: scroll;
        overflow: hidden; /* Prevent scrolls during scaling */
    }
}

@media (max-width: 600px) {
    .controls {
        padding: 24px 16px;
        gap: 24px;
    }
    
    header .logo {
        font-size: 1.5rem;
    }
    
    .format-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .control-group {
        padding: 16px;
    }

    .logo-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .logo-item {
        height: 50px;
    }
}

::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
}