:root {
    --primary-color: #6366f1; /* Indigo */
    --primary-hover: #4f46e5;
    --dark-blue: #1e293b;   /* Slate 800 */
    --slate: #64748b;     /* Slate 500 */
    --light-gray: #f8fafc;  /* Slate 50 */
    --white: #ffffff;
    --border-color: #e2e8f0; /* Slate 200 */
    --danger-color: #ef4444;  /* Red 500 */
    --danger-hover: #dc2626; /* Red 600 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    color: var(--dark-blue);
    background-color: var(--light-gray);
    line-height: 1.6;
}

.container { max-width: 1600px; margin: 0 auto; padding: 0 2rem; }

/* Consistent App Navbar */
.app-navbar { background: var(--white); border-bottom: 1px solid var(--border-color); padding: 0.75rem 0; }
.app-navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.25rem; font-weight: 700; text-decoration: none; color: var(--primary-color); }
.app-navbar nav { display: flex; align-items: center; gap: 1rem; }
.nav-link { text-decoration: none; color: var(--slate); font-weight: 500; transition: color 0.2s; }
.nav-link:hover { color: var(--primary-color); }
.button, .button-secondary, .button-icon { border: none; border-radius: 0.5rem; cursor: pointer; font-weight: 600; transition: all 0.2s; display: inline-flex; align-items: center; justify-content: center; }
.button-secondary { background-color: var(--light-gray); border: 1px solid var(--border-color); color: var(--dark-blue); padding: 0.5rem 1rem; font-size: 0.9rem; }
.button-icon { background: transparent; color: var(--slate); padding: 0.25rem; width: 32px; height: 32px; font-size: 1.5rem; }
.button-icon:hover { color: var(--dark-blue); background-color: var(--light-gray); }

/* App Wrapper */
.app-wrapper {
    max-width: 900px;
    margin: 2rem auto;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

h1 { color: var(--dark-blue); margin-bottom: 2rem; text-align: center; font-size: 1.8rem; font-weight: 600; }
h3 { color: var(--primary-color); border-bottom: 2px solid var(--primary-color); padding-bottom: 8px; margin-top: 2rem; font-size: 1.25rem; font-weight: 600;}
label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 0.9rem; color: var(--dark-blue);}
input[type="password"], input[type="number"], textarea {
    width: 100%; padding: 10px 14px; margin-bottom: 1rem;
    border: 1px solid var(--border-color); border-radius: 6px; font-family: inherit;
    box-sizing: border-box; font-size: 0.95rem; color: var(--dark-blue);
    transition: border-color 0.2s, box-shadow 0.2s;
}
input[type="password"]:focus, input[type="number"]:focus, textarea:focus {
    outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}
textarea { resize: vertical; min-height: 54px; }
.token-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 1rem;}
.details-inputs { display: grid; grid-template-columns: 1fr 2fr; gap: 1.5rem; align-items: flex-start; }
.condition-fields { margin-bottom: 1.5rem; }
.condition-checkboxes { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center; padding: 12px 15px; background-color: var(--light-gray); border-radius: 8px;}
.condition-checkboxes label { margin: 0; font-weight: 500; display: flex; align-items: center; gap: 6px; cursor: pointer; color: var(--slate); font-size: 0.9rem;}
.condition-checkboxes input[type="checkbox"] { accent-color: var(--primary-color); width: 16px; height: 16px; cursor: pointer;}
.image-upload-areas { display: grid; grid-template-columns: 2fr 1fr; gap: 1.5rem; }
.drop-zone {
    border: 2px dashed var(--border-color); border-radius: 8px; padding: 1.5rem 1rem;
    text-align: center; cursor: pointer; transition: background-color 0.2s, border-color 0.2s; margin-bottom: 1rem;
    background-color: var(--white);
}
.drop-zone:hover { border-color: var(--primary-color); }
.drop-zone p { margin: 0; font-weight: 500; font-size: 0.9rem; color: var(--slate); }
.drop-zone.drag-over { background-color: rgba(99, 102, 241, 0.05); border-color: var(--primary-color); }
.thumbnail-preview-container {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 1rem; padding: 1rem; background-color: var(--light-gray);
    border-radius: 8px; min-height: 140px;
}
.size-thumbnail-preview { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); min-height: 140px; align-items: center; }
.thumbnail-wrapper { position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.thumbnail-item {
    position: relative; width: 110px; height: 110px;
    border-radius: 6px; overflow: hidden; cursor: grab;
    background-color: var(--white); border: 1px solid var(--border-color);
}
.thumbnail-item img { width: 100%; height: 100%; object-fit: contain; }
.thumbnail-delete {
    position: absolute; top: 4px; right: 4px; width: 20px; height: 20px;
    background-color: rgba(30, 41, 59, 0.7); color: var(--white); border: none;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: bold; line-height: 1;
    cursor: pointer; opacity: 0; transition: opacity 0.2s; z-index: 10;
}
.thumbnail-item:hover .thumbnail-delete { opacity: 1; }
.ai-checkbox-label { display: flex; align-items: center; gap: 5px; font-size: 0.8rem; color: var(--slate); }
.ai-checkbox { accent-color: var(--primary-color); }

.button-container { display: grid; grid-template-columns: auto 1fr; gap: 1rem; margin-top: 2.5rem; }
button#generateButton {
    background-color: var(--primary-color); color: var(--white); border: none;
    padding: 12px 20px; border-radius: 6px; cursor: pointer; font-size: 1rem; font-weight: 600;
    transition: background-color 0.2s, transform 0.1s;
}
button#generateButton:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
button#generateButton:disabled { background-color: #cbd5e1; color: var(--slate); cursor: not-allowed; transform: none; }
button#clearFormButton {
    background-color: var(--slate); color: var(--white); border: none;
    padding: 12px 20px; border-radius: 6px; cursor: pointer; font-size: 1rem; font-weight: 600;
    transition: background-color 0.2s, transform 0.1s;
}
button#clearFormButton:hover { background-color: var(--danger-color); }

#progress-container { margin-top: 1.5rem; padding: 1rem; border: 1px solid var(--border-color); border-radius: 8px; background-color: var(--light-gray); display: none; }
#progress-text { margin: 0 0 10px 0; font-weight: 500; font-size: 0.9rem;}
progress { width: 100%; height: 8px; border-radius: 4px; overflow: hidden; border: none; }
progress::-webkit-progress-bar { background-color: var(--border-color); }
progress::-webkit-progress-value { background-color: var(--primary-color); transition: width 0.3s ease; }
#progress-log { margin-top: 10px; font-size: 0.85em; max-height: 150px; overflow-y: auto; background: var(--white); padding: 10px; border-radius: 6px; border: 1px solid var(--border-color); color: var(--slate);}

.listing-field { border-bottom: 1px solid var(--border-color); margin-bottom: 2.5rem; padding-bottom: 2.5rem; }
.listing-field:last-of-type { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

/* Responsive */
@media (max-width: 768px) {
    body { padding: 0; }
    .app-wrapper { padding: 1.5rem; margin: 0; border-radius: 0; box-shadow: none; }
    .app-navbar .container { padding: 0 1rem; }
    .app-navbar nav { display: none; } /* Hide nav on mobile for this specific app */

    /* Stack elements on smaller screens */
    .token-inputs, .details-inputs, .image-upload-areas { grid-template-columns: 1fr; }
    .button-container { grid-template-columns: 1fr; } /* Stack buttons */
}