/* ============================================
   Stock Management - Professional Design System
   Sharp, Consistent, Modern Dark Theme
   ============================================ */

/* ============================================
   ROOT VARIABLES - Unified Design Tokens
   ============================================ */
:root {
    /* Primary Brand Colors - Blue Theme */
    --sm-primary: #4F46E5;          /* Indigo-600 - Primary actions */
    --sm-primary-hover: #4338CA;    /* Indigo-700 - Hover state */
    --sm-primary-dark: #3730A3;     /* Indigo-800 - Active state */
    --sm-primary-light: #6366F1;    /* Indigo-500 - Light variant */
    --sm-primary-subtle: rgba(79, 70, 229, 0.1);
    
    /* Semantic Colors */
    --sm-success: #10B981;          /* Green-500 */
    --sm-success-hover: #059669;    /* Green-600 */
    --sm-success-subtle: rgba(16, 185, 129, 0.1);
    
    --sm-warning: #F59E0B;          /* Amber-500 */
    --sm-warning-hover: #D97706;    /* Amber-600 */
    --sm-warning-subtle: rgba(245, 158, 11, 0.1);
    
    --sm-error: #EF4444;            /* Red-500 */
    --sm-error-hover: #DC2626;      /* Red-600 */
    --sm-error-subtle: rgba(239, 68, 68, 0.1);
    
    --sm-info: #3B82F6;             /* Blue-500 */
    --sm-info-hover: #2563EB;       /* Blue-600 */
    --sm-info-subtle: rgba(59, 130, 246, 0.1);
    
    /* Neutral Colors - Dark Background System */
    --sm-bg-app: #0A0A0B;           /* App background */
    --sm-bg-page: #111113;          /* Page background */
    --sm-bg-card: #1A1A1D;          /* Card background */
    --sm-bg-elevated: #222225;      /* Elevated elements */
    --sm-bg-hover: #2A2A2D;         /* Hover states */
    --sm-bg-input: #18181B;         /* Input backgrounds */
    
    /* Text Colors - Hierarchical */
    --sm-text-primary: #F9FAFB;     /* Primary text - high emphasis */
    --sm-text-secondary: #D1D5DB;   /* Secondary text - medium emphasis */
    --sm-text-tertiary: #9CA3AF;    /* Tertiary text - low emphasis */
    --sm-text-disabled: #6B7280;    /* Disabled text */
    --sm-text-inverse: #111113;     /* Text on colored backgrounds */
    
    /* Border Colors - Subtle to Strong */
    --sm-border-subtle: #27272A;    /* Subtle borders */
    --sm-border-medium: #3F3F46;    /* Medium borders */
    --sm-border-strong: #52525B;    /* Strong borders */
    --sm-border-focus: var(--sm-primary);
    
    /* Shadow System - Depth */
    --sm-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.6);
    --sm-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6), 0 2px 4px -1px rgba(0, 0, 0, 0.4);
    --sm-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --sm-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    
    /* Glow Effects - Focused states */
    --sm-glow-primary: 0 0 0 3px rgba(79, 70, 229, 0.15);
    --sm-glow-success: 0 0 0 3px rgba(16, 185, 129, 0.15);
    --sm-glow-error: 0 0 0 3px rgba(239, 68, 68, 0.15);
    
    /* Spacing Scale - Consistent rhythm */
    --sm-space-1: 0.25rem;   /* 4px */
    --sm-space-2: 0.5rem;    /* 8px */
    --sm-space-3: 0.75rem;   /* 12px */
    --sm-space-4: 1rem;      /* 16px */
    --sm-space-5: 1.25rem;   /* 20px */
    --sm-space-6: 1.5rem;    /* 24px */
    --sm-space-8: 2rem;      /* 32px */
    --sm-space-10: 2.5rem;   /* 40px */
    --sm-space-12: 3rem;     /* 48px */
    --sm-space-16: 4rem;     /* 64px */
    
    /* Border Radius - Sharp & consistent */
    --sm-radius-sm: 0.375rem;   /* 6px */
    --sm-radius-md: 0.5rem;     /* 8px */
    --sm-radius-lg: 0.75rem;    /* 12px */
    --sm-radius-xl: 1rem;       /* 16px */
    --sm-radius-full: 9999px;
    
    /* Typography Scale */
    --sm-text-xs: 0.75rem;      /* 12px */
    --sm-text-sm: 0.875rem;     /* 14px */
    --sm-text-base: 1rem;       /* 16px */
    --sm-text-lg: 1.125rem;     /* 18px */
    --sm-text-xl: 1.25rem;      /* 20px */
    --sm-text-2xl: 1.5rem;      /* 24px */
    --sm-text-3xl: 1.875rem;    /* 30px */
    --sm-text-4xl: 2.25rem;     /* 36px */
    
    /* Font Weights */
    --sm-font-normal: 400;
    --sm-font-medium: 500;
    --sm-font-semibold: 600;
    --sm-font-bold: 700;
    
    /* Transitions - Smooth & snappy */
    --sm-transition-fast: 100ms cubic-bezier(0.4, 0, 0.2, 1);
    --sm-transition-base: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --sm-transition-slow: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --sm-z-dropdown: 1000;
    --sm-z-sticky: 1020;
    --sm-z-fixed: 1030;
    --sm-z-modal-backdrop: 1040;
    --sm-z-modal: 1050;
    --sm-z-popover: 1060;
    --sm-z-tooltip: 1070;
}

/* ============================================
   GLOBAL RESETS & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    background-color: #0A0A0B !important;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
    background-color: #0A0A0B !important;
    color: #F9FAFB !important;
    line-height: 1.6;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--sm-bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--sm-bg-lighter);
    border-radius: var(--sm-radius-md);
    border: 2px solid var(--sm-bg-dark);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--sm-border-strong);
}

/* Selection */
::selection {
    background-color: var(--sm-primary);
    color: var(--sm-text-primary);
}

::-moz-selection {
    background-color: var(--sm-primary);
    color: var(--sm-text-primary);
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

/* AppBar - Top Navigation */
.sm-appbar {
    background: linear-gradient(135deg, var(--sm-bg-dark) 0%, var(--sm-bg-medium) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--sm-border-medium);
    box-shadow: var(--sm-shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.sm-appbar-title {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--sm-primary) 0%, var(--sm-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

/* Sidebar Navigation */
.sm-drawer {
    background: var(--sm-surface-1);
    border-right: 1px solid var(--sm-border-medium);
    height: 100vh;
    overflow-y: auto;
}

.sm-nav-link {
    display: flex;
    align-items: center;
    padding: var(--sm-spacing-md) var(--sm-spacing-lg);
    color: var(--sm-text-secondary);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all var(--sm-transition-base);
    font-weight: 500;
    margin: var(--sm-spacing-xs) 0;
}

.sm-nav-link:hover {
    background: var(--sm-surface-2);
    color: var(--sm-text-primary);
    border-left-color: var(--sm-primary);
    transform: translateX(4px);
}

.sm-nav-link.active {
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.1) 0%, transparent 100%);
    color: var(--sm-primary);
    border-left-color: var(--sm-primary);
    box-shadow: inset 0 0 20px rgba(59, 130, 246, 0.05);
}

.sm-nav-icon {
    margin-right: var(--sm-spacing-md);
    width: 20px;
    height: 20px;
}

/* Main Content Area */
.sm-main-content {
    background: var(--sm-bg-darkest);
    min-height: 100vh;
    padding: var(--sm-spacing-2xl) var(--sm-spacing-xl);
}

/* ============================================
   CARDS & SURFACES
   ============================================ */
.sm-card {
    background: var(--sm-surface-1);
    border: 1px solid var(--sm-border-medium);
    border-radius: var(--sm-radius-lg);
    padding: var(--sm-spacing-xl);
    box-shadow: var(--sm-shadow-md);
    transition: all var(--sm-transition-base);
}

.sm-card:hover {
    border-color: var(--sm-border-strong);
    box-shadow: var(--sm-shadow-lg);
    transform: translateY(-2px);
}

.sm-card-elevated {
    background: var(--sm-surface-elevated);
    box-shadow: var(--sm-shadow-xl);
}

.sm-card-gradient {
    background: linear-gradient(135deg, var(--sm-surface-1) 0%, var(--sm-surface-2) 100%);
    border: 1px solid rgba(59, 130, 246, 0.1);
}

/* ============================================
   BUTTONS
   ============================================ */
.sm-btn {
    padding: var(--sm-spacing-sm) var(--sm-spacing-lg);
    border-radius: var(--sm-radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: all var(--sm-transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--sm-spacing-sm);
    font-family: var(--sm-font-sans);
}

.sm-btn-primary {
    background: linear-gradient(135deg, var(--sm-primary) 0%, var(--sm-primary-dark) 100%);
    color: var(--sm-text-primary);
    box-shadow: var(--sm-shadow-sm);
}

.sm-btn-primary:hover {
    background: linear-gradient(135deg, var(--sm-primary-hover) 0%, var(--sm-primary) 100%);
    box-shadow: var(--sm-shadow-md), var(--sm-glow-primary);
    transform: translateY(-2px);
}

.sm-btn-secondary {
    background: var(--sm-surface-2);
    color: var(--sm-text-primary);
    border: 1px solid var(--sm-border-medium);
}

.sm-btn-secondary:hover {
    background: var(--sm-surface-3);
    border-color: var(--sm-border-strong);
}

.sm-btn-success {
    background: linear-gradient(135deg, var(--sm-success) 0%, #059669 100%);
    color: var(--sm-text-primary);
}

.sm-btn-success:hover {
    box-shadow: var(--sm-shadow-md), var(--sm-glow-success);
    transform: translateY(-2px);
}

.sm-btn-danger {
    background: linear-gradient(135deg, var(--sm-error) 0%, #dc2626 100%);
    color: var(--sm-text-primary);
}

.sm-btn-danger:hover {
    box-shadow: var(--sm-shadow-md), var(--sm-glow-error);
    transform: translateY(-2px);
}

.sm-btn-ghost {
    background: transparent;
    color: var(--sm-text-secondary);
    border: 1px solid transparent;
}

.sm-btn-ghost:hover {
    background: var(--sm-surface-2);
    color: var(--sm-text-primary);
    border-color: var(--sm-border-medium);
}

/* ============================================
   FORMS & INPUTS
   ============================================ */
.sm-input {
    width: 100%;
    padding: var(--sm-spacing-md);
    background: var(--sm-surface-2);
    border: 1px solid var(--sm-border-medium);
    border-radius: var(--sm-radius-md);
    color: var(--sm-text-primary);
    font-family: var(--sm-font-sans);
    font-size: 0.875rem;
    transition: all var(--sm-transition-base);
}

.sm-input:focus {
    outline: none;
    border-color: var(--sm-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--sm-surface-1);
}

.sm-input::placeholder {
    color: var(--sm-text-tertiary);
}

.sm-input-group {
    margin-bottom: var(--sm-spacing-lg);
}

.sm-label {
    display: block;
    margin-bottom: var(--sm-spacing-sm);
    color: var(--sm-text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
}

.sm-select {
    width: 100%;
    padding: var(--sm-spacing-md);
    background: var(--sm-surface-2);
    border: 1px solid var(--sm-border-medium);
    border-radius: var(--sm-radius-md);
    color: var(--sm-text-primary);
    font-family: var(--sm-font-sans);
    cursor: pointer;
    transition: all var(--sm-transition-base);
}

.sm-select:focus {
    outline: none;
    border-color: var(--sm-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ============================================
   TABLES
   ============================================ */
.sm-table {
    width: 100%;
    background: var(--sm-surface-1);
    border-radius: var(--sm-radius-lg);
    overflow: hidden;
    border: 1px solid var(--sm-border-medium);
}

.sm-table thead {
    background: var(--sm-surface-2);
}

.sm-table th {
    padding: var(--sm-spacing-md) var(--sm-spacing-lg);
    text-align: left;
    font-weight: 600;
    color: var(--sm-text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--sm-border-medium);
}

.sm-table td {
    padding: var(--sm-spacing-md) var(--sm-spacing-lg);
    border-bottom: 1px solid var(--sm-border-subtle);
    color: var(--sm-text-primary);
}

.sm-table tbody tr {
    transition: all var(--sm-transition-fast);
}

.sm-table tbody tr:hover {
    background: var(--sm-surface-2);
}

.sm-table tbody tr:last-child td {
    border-bottom: none;
}

/* ============================================
   BADGES & CHIPS
   ============================================ */
.sm-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--sm-spacing-xs) var(--sm-spacing-md);
    border-radius: var(--sm-radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sm-badge-primary {
    background: rgba(59, 130, 246, 0.15);
    color: var(--sm-primary-light);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.sm-badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.sm-badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.sm-badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.sm-badge-neutral {
    background: rgba(160, 160, 160, 0.15);
    color: var(--sm-text-secondary);
    border: 1px solid var(--sm-border-medium);
}

/* ============================================
   ALERTS & NOTIFICATIONS
   ============================================ */
.sm-alert {
    padding: var(--sm-spacing-md) var(--sm-spacing-lg);
    border-radius: var(--sm-radius-md);
    margin-bottom: var(--sm-spacing-lg);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--sm-spacing-md);
}

.sm-alert-info {
    background: rgba(6, 182, 212, 0.1);
    border-left-color: var(--sm-info);
    color: #67e8f9;
}

.sm-alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-left-color: var(--sm-success);
    color: #34d399;
}

.sm-alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--sm-warning);
    color: #fbbf24;
}

.sm-alert-error {
    background: rgba(239, 68, 68, 0.1);
    border-left-color: var(--sm-error);
    color: #f87171;
}

/* ============================================
   MODAL & DIALOG
   ============================================ */
.sm-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: sm-fade-in 0.2s ease-out;
}

.sm-modal {
    background: var(--sm-surface-elevated);
    border: 1px solid var(--sm-border-strong);
    border-radius: var(--sm-radius-xl);
    box-shadow: var(--sm-shadow-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: sm-slide-up 0.3s ease-out;
}

.sm-modal-header {
    padding: var(--sm-spacing-xl);
    border-bottom: 1px solid var(--sm-border-medium);
}

.sm-modal-body {
    padding: var(--sm-spacing-xl);
}

.sm-modal-footer {
    padding: var(--sm-spacing-xl);
    border-top: 1px solid var(--sm-border-medium);
    display: flex;
    justify-content: flex-end;
    gap: var(--sm-spacing-md);
}

/* ============================================
   LOADING & SPINNERS
   ============================================ */
.sm-spinner {
    border: 3px solid var(--sm-border-medium);
    border-top-color: var(--sm-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: sm-spin 0.8s linear infinite;
}

.sm-skeleton {
    background: linear-gradient(
        90deg,
        var(--sm-surface-2) 25%,
        var(--sm-surface-3) 50%,
        var(--sm-surface-2) 75%
    );
    background-size: 200% 100%;
    animation: sm-skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--sm-radius-md);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Spacing */
.sm-mt-1 { margin-top: var(--sm-spacing-xs); }
.sm-mt-2 { margin-top: var(--sm-spacing-sm); }
.sm-mt-3 { margin-top: var(--sm-spacing-md); }
.sm-mt-4 { margin-top: var(--sm-spacing-lg); }
.sm-mt-5 { margin-top: var(--sm-spacing-xl); }

.sm-mb-1 { margin-bottom: var(--sm-spacing-xs); }
.sm-mb-2 { margin-bottom: var(--sm-spacing-sm); }
.sm-mb-3 { margin-bottom: var(--sm-spacing-md); }
.sm-mb-4 { margin-bottom: var(--sm-spacing-lg); }
.sm-mb-5 { margin-bottom: var(--sm-spacing-xl); }

.sm-p-1 { padding: var(--sm-spacing-xs); }
.sm-p-2 { padding: var(--sm-spacing-sm); }
.sm-p-3 { padding: var(--sm-spacing-md); }
.sm-p-4 { padding: var(--sm-spacing-lg); }
.sm-p-5 { padding: var(--sm-spacing-xl); }

/* Text */
.sm-text-primary { color: var(--sm-text-primary); }
.sm-text-secondary { color: var(--sm-text-secondary); }
.sm-text-tertiary { color: var(--sm-text-tertiary); }

.sm-text-xs { font-size: 0.75rem; }
.sm-text-sm { font-size: 0.875rem; }
.sm-text-base { font-size: 1rem; }
.sm-text-lg { font-size: 1.125rem; }
.sm-text-xl { font-size: 1.25rem; }
.sm-text-2xl { font-size: 1.5rem; }
.sm-text-3xl { font-size: 1.875rem; }

.sm-font-bold { font-weight: 700; }
.sm-font-semibold { font-weight: 600; }
.sm-font-medium { font-weight: 500; }

/* Flexbox */
.sm-flex { display: flex; }
.sm-flex-col { flex-direction: column; }
.sm-items-center { align-items: center; }
.sm-justify-between { justify-content: space-between; }
.sm-justify-center { justify-content: center; }
.sm-gap-1 { gap: var(--sm-spacing-xs); }
.sm-gap-2 { gap: var(--sm-spacing-sm); }
.sm-gap-3 { gap: var(--sm-spacing-md); }
.sm-gap-4 { gap: var(--sm-spacing-lg); }

/* Grid */
.sm-grid { display: grid; }
.sm-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.sm-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.sm-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Borders */
.sm-border { border: 1px solid var(--sm-border-medium); }
.sm-border-t { border-top: 1px solid var(--sm-border-medium); }
.sm-border-b { border-bottom: 1px solid var(--sm-border-medium); }
.sm-rounded { border-radius: var(--sm-radius-md); }
.sm-rounded-lg { border-radius: var(--sm-radius-lg); }

/* Shadows */
.sm-shadow { box-shadow: var(--sm-shadow-md); }
.sm-shadow-lg { box-shadow: var(--sm-shadow-lg); }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes sm-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes sm-slide-up {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes sm-spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes sm-skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .sm-main-content {
        padding: var(--sm-spacing-lg) var(--sm-spacing-md);
    }
    
    .sm-card {
        padding: var(--sm-spacing-lg);
    }
    
    .sm-grid-cols-2,
    .sm-grid-cols-3,
    .sm-grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   DARK MODE ENHANCEMENTS
   ============================================ */

/* Glassmorphism Effect */
.sm-glass {
    background: rgba(26, 26, 26, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Neon Accent */
.sm-neon-accent {
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5),
                0 0 20px rgba(59, 130, 246, 0.3),
                0 0 30px rgba(59, 130, 246, 0.1);
}

/* Gradient Text */
.sm-gradient-text {
    background: linear-gradient(135deg, var(--sm-primary) 0%, var(--sm-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Code Block */
.sm-code {
    background: var(--sm-bg-darker);
    border: 1px solid var(--sm-border-medium);
    border-radius: var(--sm-radius-md);
    padding: var(--sm-spacing-md);
    font-family: var(--sm-font-mono);
    font-size: 0.875rem;
    color: #a6e22e;
    overflow-x: auto;
}

/* Status Indicators */
.sm-status-online {
    width: 8px;
    height: 8px;
    background: var(--sm-success);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--sm-success);
}

.sm-status-offline {
    width: 8px;
    height: 8px;
    background: var(--sm-text-tertiary);
    border-radius: 50%;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .sm-drawer,
    .sm-appbar,
    .sm-btn {
        display: none;
    }
}