/* ============================================
   E-ERP B2B Portal — Base CSS
   Reset, CSS Variables, Typography
   ============================================ */

/* === CSS RESET === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* === CSS VARIABLES === */
:root {
    /* Colors */
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #e0f2fe;
    --primary-50: #f0f9ff;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    --purple: #8b5cf6;
    --purple-light: #ede9fe;

    /* Badge dark text colors (for contrast on light backgrounds) */
    --success-dark: #065f46;
    --warning-dark: #92400e;
    --danger-dark: #991b1b;
    --info-dark: #1e40af;
    --purple-dark: #5b21b6;

    --dark: #1e293b;
    --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;
    --white: #ffffff;

    /* Shadows */
    --card-shadow: 0 4px 15px rgba(0,0,0,0.08);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px rgba(0,0,0,0.15);

    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --header-height: 60px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Z-index layers */
    --z-sidebar: 100;
    --z-header: 200;
    --z-dropdown: 500;
    --z-modal-backdrop: 1000;
    --z-modal: 1001;
    --z-toast: 2000;
}

/* === TYPOGRAPHY === */
html {
    font-size: 14px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--gray-700);
    background: var(--gray-100);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p { margin-bottom: 0.5rem; }

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover { color: var(--primary-dark); }

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

/* === SELECTION === */
::selection {
    background: var(--primary-light);
    color: var(--primary-dark);
}

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-muted { color: var(--gray-500); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-bold { font-weight: 600; }
.text-sm { font-size: 0.8125rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }

.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.flex-1 { flex: 1; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: 6px; }
.gap-md { gap: 12px; }
.gap-lg { gap: 16px; }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}