:root {
    --primary: #0D6EFD;
    --bg-main: #FBFBFC;
    --border-color: #E9ECEF;
    --text-main: #212529;
    --text-muted: #6C757D;
    --card-bg: #FFFFFF;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.apple-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.apple-button {
    background-color: var(--primary);
    color: #ffffff;
    border-radius: 6px;
    padding: 6px 14px;
    font-weight: 500;
    font-size: 13px;
    border: 1px solid rgba(0,0,0,0.05);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.1s ease-in-out;
}

.apple-button:hover {
    background-color: #0b5ed7;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.apple-button-secondary {
    background-color: #ffffff;
    color: var(--text-main);
    border: 1px solid #DEE2E6;
}

.apple-button-secondary:hover {
    background-color: #F8F9FA;
}

.input-field {
    width: 100%;
    padding: 7px 11px;
    border-radius: 6px;
    border: 1px solid #DEE2E6;
    background: #FFFFFF;
    font-size: 14px;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.input-field:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.status-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.status-available { background: #E1F5FE; color: #01579B; border: 1px solid #B3E5FC; }
.status-borrowed { background: #FFF3E0; color: #E65100; border: 1px solid #FFE0B2; }

.glass-nav {
    background: #FFFFFF;
    border-bottom: 1px solid var(--border-color);
}

.fullscreen-modal {
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    max-height: none !important;
    margin: 0 !important;
    background: white !important;
    border: none !important;
}

/* Animations - very subtle */
.animate-up {
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.custom-scrollbar::-webkit-scrollbar { width: 4px; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #DEE2E6; border-radius: 4px; }