:root {
    --primary-color: #6366f1;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --border-glass: rgba(255, 255, 255, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: #f8fafc;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Upload Dropzone */
.upload-zone {
    border: 2px dashed var(--border-glass);
    border-radius: 1.5rem;
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.02);
}

.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
}

.upload-zone i {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: inline-block;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Progress Bar */
.progress {
    height: 0.75rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 1rem;
    overflow: hidden;
}

.progress-bar {
    background: var(--primary-gradient);
}

/* Buttons */
.btn-primary-gradient {
    background: var(--primary-gradient);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    transition: all 0.3s ease;
}

.btn-primary-gradient:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
}

/* Gallery Grid */
.file-card {
    position: relative;
    overflow: hidden;
    height: 100%;
}

.file-thumb {
    width: 100%;
    aspect-ratio: 1/1;
    object-fit: cover;
    border-radius: 1rem;
    transition: transform 0.5s ease;
}

.file-card:hover .file-thumb {
    transform: scale(1.05);
}

.file-actions {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.file-card:hover .file-actions {
    opacity: 1;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .navbar-brand span {
        font-size: 1.1rem;
    }
    
    .glass-card {
        border-radius: 1rem;
        padding: 1.25rem !important;
    }
    
    .upload-zone {
        padding: 2rem 1rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
}

/* Toast/Alert Animations */
.fade-in-up {
    animation: fadeInUp 0.4s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}