/* ============================================
   PharmaQR - Global Design System
   ============================================ */

:root {
    /* Color Palette (Sentinus Green & Blue) */
    --primary: #378b41;
    --primary-light: #4ba65b;
    --primary-dark: #27692e;
    --primary-50: #eef7f0;
    --primary-100: #d4ebd7;
    --primary-200: #add6b4;

    --accent: #2e4776;
    --accent-light: #3e60a3;

    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Surfaces */
    --bg-body: #f4f7f5;
    --bg-card: #ffffff;
    --bg-sidebar: #1a2639;
    --bg-input: #f8fafc;

    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Sidebar */
    --sidebar-width: 260px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1 { font-size: 1.875rem; font-weight: 800; letter-spacing: -0.025em; }
h2 { font-size: 1.375rem; font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: 1.125rem; font-weight: 600; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: none; border-radius: var(--radius-md);
    font-family: inherit; font-size: 0.875rem; font-weight: 600;
    cursor: pointer; transition: all var(--transition-fast);
    text-decoration: none; white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white; box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}
.btn-primary:hover { box-shadow: 0 4px 16px rgba(37,99,235,0.4); transform: translateY(-1px); }

.btn-outline {
    background: transparent; color: var(--primary);
    border: 1.5px solid var(--primary-200);
}
.btn-outline:hover { background: var(--primary-50); border-color: var(--primary); }

.btn-ghost {
    background: transparent; color: var(--text-secondary);
}
.btn-ghost:hover { background: var(--gray-100); color: var(--text-primary); }

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: white; box-shadow: 0 2px 8px rgba(239,68,68,0.3);
}
.btn-danger:hover { box-shadow: 0 4px 16px rgba(239,68,68,0.4); }

.btn-sm { padding: var(--space-2) var(--space-4); font-size: 0.8125rem; }

/* Form Elements */
input[type="text"], input[type="email"], input[type="number"], select, textarea {
    width: 100%; padding: var(--space-3) var(--space-4);
    background: var(--bg-input); border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md); font-family: inherit; font-size: 0.9rem;
    color: var(--text-primary); transition: all var(--transition-fast);
    outline: none;
}
input:focus, select:focus, textarea:focus {
    border-color: var(--primary); background: white;
    box-shadow: 0 0 0 3px var(--primary-100);
}
textarea { resize: vertical; min-height: 100px; }
label { display: block; font-size: 0.8125rem; font-weight: 600; color: var(--text-secondary); margin-bottom: var(--space-2); }

/* Modal */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(15,23,42,0.6);
    backdrop-filter: blur(4px); display: none; align-items: center; justify-content: center;
    z-index: 1000; padding: var(--space-4);
}
.modal-overlay.active { display: flex; }
.modal {
    background: white; border-radius: var(--radius-lg); width: 100%; max-width: 480px;
    box-shadow: var(--shadow-xl); animation: modalIn 0.2s ease;
}
.modal-sm { max-width: 380px; }
@keyframes modalIn { from { opacity: 0; transform: scale(0.95) translateY(10px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: var(--space-5) var(--space-6); border-bottom: 1px solid var(--gray-100);
}
.modal-close {
    width: 32px; height: 32px; border: none; background: var(--gray-100);
    border-radius: var(--radius-sm); font-size: 1.25rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center; color: var(--text-secondary);
}
.modal-close:hover { background: var(--gray-200); }
.modal-body { padding: var(--space-6); }
.modal-footer { padding: var(--space-4) var(--space-6); border-top: 1px solid var(--gray-100); display: flex; justify-content: flex-end; gap: var(--space-3); }
.modal-qr { display: flex; justify-content: center; padding: var(--space-4); }
.modal-url { text-align: center; font-size: 0.75rem; color: var(--text-muted); word-break: break-all; margin-top: var(--space-3); }

/* Toast */
.toast-container { position: fixed; top: var(--space-6); right: var(--space-6); z-index: 2000; display: flex; flex-direction: column; gap: var(--space-3); }
.toast {
    padding: var(--space-4) var(--space-5); border-radius: var(--radius-md);
    font-size: 0.875rem; font-weight: 500; color: white; min-width: 280px;
    box-shadow: var(--shadow-lg); animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
}
.toast.success { background: linear-gradient(135deg, var(--success), #059669); }
.toast.error { background: linear-gradient(135deg, var(--danger), #dc2626); }
.toast.info { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateY(-10px); } }

/* Empty State */
.empty-state {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: var(--space-12); color: var(--text-muted); text-align: center; gap: var(--space-4);
}
.empty-state p { font-size: 0.9375rem; }

/* Loading Spinner */
.spinner {
    width: 40px; height: 40px; border: 3px solid var(--gray-200);
    border-top-color: var(--primary); border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Delete medicine name */
.delete-medicine-name { font-weight: 700; color: var(--danger); margin-top: var(--space-2); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }