:root {
    --app-primary: #1e3a8a;
    --app-secondary: #3b82f6;
    --app-accent: #f59e0b;
}

body.app-ui {
    font-family: 'Prompt', sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body.app-surface-slate {
    background-color: #f1f5f9;
}

body.app-surface-soft {
    background-color: #f8fafc;
}

body.app-surface-gradient {
    background: #e2e8f0;
}

body.app-ui ::-webkit-scrollbar {
    display: none;
}

.app-shell {
    background: linear-gradient(180deg, #dbeafe 0%, #f8fafc 180px);
}

.app-shell-frame {
    min-height: 100vh;
    width: 100%;
    max-width: 28rem;
    margin: 0 auto;
    box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
}

@media (min-width: 768px) {
    .app-shell-frame {
        max-width: none;
        box-shadow: none;
    }
}

.app-header-blue {
    background: rgba(30, 58, 138, 0.95);
    backdrop-filter: blur(14px);
}

.app-header-light {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.bottom-nav {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    box-shadow: 0 -8px 30px rgba(15, 23, 42, 0.08);
}

.nav-item.active {
    color: var(--app-secondary);
}

.glass-card {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 10px 30px rgba(30, 41, 59, 0.08);
}

.file-upload-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    cursor: pointer;
}

.file-upload-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
}