/**
 * Modern Design System for Mobile POS
 * Premium, Professional, State-of-the-art UI Components
 */

/* ========================================
   CSS VARIABLES - Design Tokens
   ======================================== */
:root {
    /* Primary Colors - Will be overridden by get-colors.php */
    --primary-color: #3b82f6;
    --secondary-color: #1e3a5f;
    --background-color: #0f172a;
    --text-color: #e2e8f0;
    --accent-color: #60a5fa;
    --hover-color: #2563eb;
    --active-color: #1d4ed8;
    --border-color: rgba(59, 130, 246, 0.3);

    /* Semantic Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;

    /* Neutral Grays */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.4);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   GLASSMORPHISM CARDS
   ======================================== */
.glass-card {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow:
        var(--shadow-xl),
        0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--accent-color), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.glass-card:hover::before {
    opacity: 1;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow:
        0 25px 70px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset,
        var(--shadow-glow);
    border-color: rgba(59, 130, 246, 0.5);
}

.glass-card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

.glass-card-body {
    padding: var(--spacing-lg);
}

.glass-card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

/* ========================================
   MODERN BUTTONS
   ======================================== */
.btn-modern {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    overflow: hidden;
    user-select: none;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-modern:hover::before {
    width: 300px;
    height: 300px;
}

.btn-modern:active {
    transform: scale(0.98);
}

.btn-modern:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button Variants */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #fff;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--hover-color), var(--primary-color));
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
    transform: translateY(-2px);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--gray-700));
    color: #fff;
    box-shadow: 0 4px 15px rgba(30, 58, 95, 0.4);
}

.btn-secondary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--gray-700), var(--secondary-color));
    box-shadow: 0 6px 20px rgba(30, 58, 95, 0.5);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-danger:hover:not(:disabled) {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-warning:hover:not(:disabled) {
    background: linear-gradient(135deg, #d97706, #b45309);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover:not(:disabled) {
    background: var(--border-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Button Sizes */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ========================================
   MODERN FORMS
   ======================================== */
.form-modern {
    width: 100%;
}

.form-group-modern {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.form-label-modern {
    display: block;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control-modern {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-color);
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-control-modern:focus {
    outline: none;
    background: rgba(30, 41, 59, 0.95);
    border-color: var(--primary-color);
    box-shadow:
        0 0 0 3px rgba(59, 130, 246, 0.2),
        0 0 20px rgba(59, 130, 246, 0.3);
}

.form-control-modern:disabled {
    background: rgba(30, 41, 59, 0.5);
    color: var(--gray-400);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-control-modern.is-invalid {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form-control-modern.is-valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

/* Input with Icon */
.input-with-icon {
    position: relative;
}

.input-with-icon .input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    pointer-events: none;
}

.input-with-icon .form-control-modern {
    padding-left: 2.75rem;
}

/* ========================================
   MODERN TABLES
   ======================================== */
.table-modern {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: rgba(15, 23, 42, 0.8);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table-modern thead {
    background: rgba(0, 0, 0, 0.3);
}

.table-modern thead th {
    padding: 1rem;
    text-align: left;
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-color);
    border-bottom: 2px solid var(--border-color);
}

.table-modern tbody tr {
    transition: all var(--transition-fast);
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.table-modern tbody tr:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: scale(1.01);
}

.table-modern tbody td {
    padding: 1rem;
    color: var(--text-color);
}

/* ========================================
   BADGES & TAGS
   ======================================== */
.badge-modern {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #fff;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.badge-success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.badge-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.badge-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.badge-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* ========================================
   MODALS
   ======================================== */
.modal-modern .modal-content {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
}

.modal-modern .modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.2);
}

.modal-modern .modal-body {
    padding: var(--spacing-lg);
}

.modal-modern .modal-footer {
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.modal-modern .btn-close {
    filter: invert(1) brightness(2);
    opacity: 0.8;
    transition: all var(--transition-base);
}

.modal-modern .btn-close:hover {
    opacity: 1;
    transform: rotate(90deg);
}

/* ========================================
   SCROLLBARS
   ======================================== */
.modern-scroll {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) rgba(15, 23, 42, 0.5);
}

.modern-scroll::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.modern-scroll::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.5);
    border-radius: var(--radius-sm);
}

.modern-scroll::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-sm);
    border: 2px solid rgba(15, 23, 42, 0.5);
}

.modern-scroll::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--hover-color), var(--primary-color));
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }

    to {
        transform: translateX(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

.animate-fadeIn {
    animation: fadeIn var(--transition-base) ease-out;
}

.animate-slideIn {
    animation: slideIn var(--transition-base) ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.text-glow {
    text-shadow: 0 0 20px var(--accent-color);
}

.bg-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.border-glow {
    box-shadow: 0 0 15px var(--primary-color);
}

.hover-lift {
    transition: transform var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.backdrop-blur {
    backdrop-filter: blur(20px) saturate(180%);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .glass-card {
        border-radius: var(--radius-lg);
    }

    .btn-modern {
        padding: 0.625rem 1.25rem;
        font-size: 0.9375rem;
    }
}