/**
 * Kestrel Shipping - Brand Design System
 * Colors, Typography, Components, and Utilities
 */

/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Brand Colors */
    --ks-primary: #a2834a;
    --ks-primary-light: #bc9566;
    --ks-primary-dark: #8a6f3d;
    --ks-light: #fefef9;
    --ks-dark: #33434e;
    --ks-accent: #bc9566;
    
    /* Extended Palette */
    --ks-primary-50: #faf8f3;
    --ks-primary-100: #f2ede1;
    --ks-primary-200: #e5dbc3;
    --ks-primary-300: #d4c49e;
    --ks-primary-400: #c4ab78;
    --ks-primary-500: #a2834a;
    --ks-primary-600: #8a6f3d;
    --ks-primary-700: #715b32;
    --ks-primary-800: #5c4a29;
    --ks-primary-900: #4a3c22;
    
    --ks-dark-50: #f4f6f7;
    --ks-dark-100: #e3e7ea;
    --ks-dark-200: #c7d0d5;
    --ks-dark-300: #a3b1ba;
    --ks-dark-400: #788c98;
    --ks-dark-500: #5d717d;
    --ks-dark-600: #4d5d67;
    --ks-dark-700: #434f57;
    --ks-dark-800: #33434e;
    --ks-dark-900: #2a3740;
    
    /* Semantic Colors */
    --ks-success: #28a745;
    --ks-success-light: #d4edda;
    --ks-warning: #ffc107;
    --ks-warning-light: #fff3cd;
    --ks-danger: #dc3545;
    --ks-danger-light: #f8d7da;
    --ks-info: #17a2b8;
    --ks-info-light: #d1ecf1;
    
    /* Text Colors */
    --ks-text-primary: #33434e;
    --ks-text-secondary: #5d717d;
    --ks-text-muted: #788c98;
    --ks-text-light: #fefef9;
    
    /* Background Colors */
    --ks-bg-primary: #fefef9;
    --ks-bg-secondary: #f4f6f7;
    --ks-bg-dark: #33434e;
    
    /* Typography */
    --ks-font-heading: 'Playfair Display', Georgia, serif;
    --ks-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --ks-font-mono: 'Fira Code', 'Consolas', monospace;
    
    /* Font Sizes */
    --ks-text-xs: 0.75rem;
    --ks-text-sm: 0.875rem;
    --ks-text-base: 1rem;
    --ks-text-lg: 1.125rem;
    --ks-text-xl: 1.25rem;
    --ks-text-2xl: 1.5rem;
    --ks-text-3xl: 1.875rem;
    --ks-text-4xl: 2.25rem;
    --ks-text-5xl: 3rem;
    --ks-text-6xl: 3.75rem;
    
    /* Font Weights */
    --ks-font-light: 300;
    --ks-font-normal: 400;
    --ks-font-medium: 500;
    --ks-font-semibold: 600;
    --ks-font-bold: 700;
    
    /* Spacing */
    --ks-space-1: 0.25rem;
    --ks-space-2: 0.5rem;
    --ks-space-3: 0.75rem;
    --ks-space-4: 1rem;
    --ks-space-5: 1.25rem;
    --ks-space-6: 1.5rem;
    --ks-space-8: 2rem;
    --ks-space-10: 2.5rem;
    --ks-space-12: 3rem;
    --ks-space-16: 4rem;
    --ks-space-20: 5rem;
    
    /* Border Radius */
    --ks-radius-sm: 0.25rem;
    --ks-radius-md: 0.375rem;
    --ks-radius-lg: 0.5rem;
    --ks-radius-xl: 0.75rem;
    --ks-radius-2xl: 1rem;
    --ks-radius-full: 9999px;
    
    /* Shadows */
    --ks-shadow-sm: 0 1px 2px 0 rgba(51, 67, 78, 0.05);
    --ks-shadow-md: 0 4px 6px -1px rgba(51, 67, 78, 0.1), 0 2px 4px -1px rgba(51, 67, 78, 0.06);
    --ks-shadow-lg: 0 10px 15px -3px rgba(51, 67, 78, 0.1), 0 4px 6px -2px rgba(51, 67, 78, 0.05);
    --ks-shadow-xl: 0 20px 25px -5px rgba(51, 67, 78, 0.1), 0 10px 10px -5px rgba(51, 67, 78, 0.04);
    
    /* Transitions */
    --ks-transition-fast: 150ms ease;
    --ks-transition-normal: 300ms ease;
    --ks-transition-slow: 500ms ease;
    
    /* Z-Index Scale */
    --ks-z-dropdown: 1000;
    --ks-z-sticky: 1020;
    --ks-z-fixed: 1030;
    --ks-z-modal-backdrop: 1040;
    --ks-z-modal: 1050;
    --ks-z-popover: 1060;
    --ks-z-tooltip: 1070;
    --ks-z-loader: 9999;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --ks-bg-primary: #1a2530;
    --ks-bg-secondary: #243240;
    --ks-bg-dark: #0f171f;
    --ks-text-primary: #fefef9;
    --ks-text-secondary: #c7d0d5;
    --ks-text-muted: #a3b1ba;
}

/* ============================================
   Typography
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

body {
    font-family: var(--ks-font-body);
    font-size: var(--ks-text-base);
    font-weight: var(--ks-font-normal);
    line-height: 1.6;
    color: var(--ks-text-primary);
    background-color: var(--ks-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--ks-font-heading);
    font-weight: var(--ks-font-bold);
    line-height: 1.2;
    color: var(--ks-text-primary);
    margin-bottom: var(--ks-space-4);
}

h1, .h1 { font-size: var(--ks-text-5xl); }
h2, .h2 { font-size: var(--ks-text-4xl); }
h3, .h3 { font-size: var(--ks-text-3xl); }
h4, .h4 { font-size: var(--ks-text-2xl); }
h5, .h5 { font-size: var(--ks-text-xl); }
h6, .h6 { font-size: var(--ks-text-lg); }

/* ============================================
   Kestrel Eagle Loader
   ============================================ */
.ks-loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(51, 67, 78, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--ks-z-loader);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--ks-transition-normal), visibility var(--ks-transition-normal);
}

.ks-loader-overlay.active {
    opacity: 1;
    visibility: visible;
}

.ks-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--ks-space-4);
}

.ks-loader-eagle {
    width: 80px;
    height: 80px;
    animation: ks-eagle-fly 2s ease-in-out infinite;
}

.ks-loader-eagle svg {
    width: 100%;
    height: 100%;
    fill: var(--ks-primary);
}

.ks-loader-text {
    color: var(--ks-light);
    font-family: var(--ks-font-heading);
    font-size: var(--ks-text-lg);
    letter-spacing: 0.1em;
}

/* Eagle flying animation */
@keyframes ks-eagle-fly {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(-5deg);
    }
    50% {
        transform: translateY(0) rotate(0deg);
    }
    75% {
        transform: translateY(-10px) rotate(5deg);
    }
}

/* Wing flap animation for SVG */
@keyframes ks-wing-flap {
    0%, 100% {
        transform: scaleY(1);
    }
    50% {
        transform: scaleY(0.85);
    }
}

/* Inline loader (for buttons, cards) */
.ks-loader-inline {
    display: inline-flex;
    align-items: center;
    gap: var(--ks-space-2);
}

.ks-loader-inline .ks-loader-eagle {
    width: 24px;
    height: 24px;
    animation: ks-eagle-spin 1s linear infinite;
}

@keyframes ks-eagle-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Skeleton loader */
.ks-skeleton {
    background: linear-gradient(90deg, 
        var(--ks-dark-100) 25%, 
        var(--ks-dark-50) 50%, 
        var(--ks-dark-100) 75%
    );
    background-size: 200% 100%;
    animation: ks-skeleton-shimmer 1.5s infinite;
    border-radius: var(--ks-radius-md);
}

@keyframes ks-skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.ks-skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.ks-skeleton-text:last-child {
    width: 70%;
}

.ks-skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--ks-radius-full);
}

.ks-skeleton-card {
    height: 200px;
}

/* ============================================
   Buttons
   ============================================ */
.btn-ks-primary {
    background-color: var(--ks-primary);
    border-color: var(--ks-primary);
    color: var(--ks-light);
    font-family: var(--ks-font-body);
    font-weight: var(--ks-font-semibold);
    padding: var(--ks-space-3) var(--ks-space-6);
    border-radius: var(--ks-radius-md);
    transition: all var(--ks-transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-ks-primary:hover,
.btn-ks-primary:focus {
    background-color: var(--ks-primary-dark);
    border-color: var(--ks-primary-dark);
    color: var(--ks-light);
    transform: translateY(-2px);
    box-shadow: var(--ks-shadow-lg);
}

.btn-ks-primary:active {
    transform: translateY(0);
}

.btn-ks-primary:disabled,
.btn-ks-primary.loading {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-ks-secondary {
    background-color: var(--ks-dark);
    border-color: var(--ks-dark);
    color: var(--ks-light);
    font-family: var(--ks-font-body);
    font-weight: var(--ks-font-semibold);
    padding: var(--ks-space-3) var(--ks-space-6);
    border-radius: var(--ks-radius-md);
    transition: all var(--ks-transition-fast);
}

.btn-ks-secondary:hover,
.btn-ks-secondary:focus {
    background-color: var(--ks-dark-700);
    border-color: var(--ks-dark-700);
    color: var(--ks-light);
}

.btn-ks-outline {
    background-color: transparent;
    border: 2px solid var(--ks-primary);
    color: var(--ks-primary);
    font-family: var(--ks-font-body);
    font-weight: var(--ks-font-semibold);
    padding: var(--ks-space-3) var(--ks-space-6);
    border-radius: var(--ks-radius-md);
    transition: all var(--ks-transition-fast);
}

.btn-ks-outline:hover,
.btn-ks-outline:focus {
    background-color: var(--ks-primary);
    color: var(--ks-light);
}

.btn-ks-accent {
    background-color: var(--ks-accent);
    border-color: var(--ks-accent);
    color: var(--ks-light);
}

/* Button loading state */
.btn.loading .btn-text {
    visibility: hidden;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: ks-btn-spin 0.8s linear infinite;
}

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

/* ============================================
   Cards
   ============================================ */
.ks-card {
    background: var(--ks-bg-primary);
    border-radius: var(--ks-radius-xl);
    box-shadow: var(--ks-shadow-md);
    border: 1px solid var(--ks-dark-100);
    overflow: hidden;
    transition: all var(--ks-transition-normal);
}

.ks-card:hover {
    box-shadow: var(--ks-shadow-xl);
    transform: translateY(-4px);
}

.ks-card-header {
    padding: var(--ks-space-6);
    border-bottom: 1px solid var(--ks-dark-100);
    background: var(--ks-bg-secondary);
}

.ks-card-body {
    padding: var(--ks-space-6);
}

.ks-card-footer {
    padding: var(--ks-space-4) var(--ks-space-6);
    border-top: 1px solid var(--ks-dark-100);
    background: var(--ks-bg-secondary);
}

/* KPI Card */
.ks-kpi-card {
    background: linear-gradient(135deg, var(--ks-primary) 0%, var(--ks-accent) 100%);
    color: var(--ks-light);
    padding: var(--ks-space-6);
    border-radius: var(--ks-radius-xl);
}

.ks-kpi-card .kpi-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--ks-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--ks-space-4);
}

.ks-kpi-card .kpi-value {
    font-family: var(--ks-font-heading);
    font-size: var(--ks-text-4xl);
    font-weight: var(--ks-font-bold);
    line-height: 1;
    margin-bottom: var(--ks-space-2);
}

.ks-kpi-card .kpi-label {
    font-size: var(--ks-text-sm);
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Form Elements
   ============================================ */
.ks-form-control {
    display: block;
    width: 100%;
    padding: var(--ks-space-3) var(--ks-space-4);
    font-family: var(--ks-font-body);
    font-size: var(--ks-text-base);
    font-weight: var(--ks-font-normal);
    line-height: 1.5;
    color: var(--ks-text-primary);
    background-color: var(--ks-bg-primary);
    background-clip: padding-box;
    border: 1px solid var(--ks-dark-200);
    border-radius: var(--ks-radius-md);
    transition: border-color var(--ks-transition-fast), box-shadow var(--ks-transition-fast);
}

.ks-form-control:focus {
    color: var(--ks-text-primary);
    background-color: var(--ks-bg-primary);
    border-color: var(--ks-primary);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(162, 131, 74, 0.25);
}

.ks-form-control::placeholder {
    color: var(--ks-text-muted);
    opacity: 1;
}

.ks-form-label {
    display: block;
    margin-bottom: var(--ks-space-2);
    font-weight: var(--ks-font-medium);
    color: var(--ks-text-primary);
}

.ks-form-label.required::after {
    content: '*';
    color: var(--ks-danger);
    margin-left: var(--ks-space-1);
}

/* ============================================
   Navigation
   ============================================ */
.ks-navbar {
    background: var(--ks-bg-primary);
    box-shadow: var(--ks-shadow-md);
    padding: var(--ks-space-4) 0;
}

.ks-navbar-brand {
    font-family: var(--ks-font-heading);
    font-size: var(--ks-text-2xl);
    font-weight: var(--ks-font-bold);
    color: var(--ks-primary);
    text-decoration: none;
}

.ks-nav-link {
    font-family: var(--ks-font-body);
    font-weight: var(--ks-font-medium);
    color: var(--ks-text-secondary);
    padding: var(--ks-space-2) var(--ks-space-4);
    transition: color var(--ks-transition-fast);
}

.ks-nav-link:hover,
.ks-nav-link.active {
    color: var(--ks-primary);
}

/* ============================================
   Status Badges
   ============================================ */
.ks-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--ks-space-1) var(--ks-space-3);
    font-size: var(--ks-text-xs);
    font-weight: var(--ks-font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--ks-radius-full);
}

.ks-badge-pending { background: var(--ks-warning-light); color: #856404; }
.ks-badge-active { background: var(--ks-success-light); color: #155724; }
.ks-badge-in-transit { background: var(--ks-info-light); color: #0c5460; }
.ks-badge-delivered { background: var(--ks-success-light); color: #155724; }
.ks-badge-cancelled { background: var(--ks-danger-light); color: #721c24; }

/* ============================================
   Dark Mode Toggle
   ============================================ */
.ks-theme-toggle {
    position: relative;
    width: 60px;
    height: 30px;
    background: var(--ks-dark-200);
    border-radius: var(--ks-radius-full);
    cursor: pointer;
    transition: background var(--ks-transition-normal);
}

.ks-theme-toggle::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 24px;
    height: 24px;
    background: var(--ks-light);
    border-radius: var(--ks-radius-full);
    transition: transform var(--ks-transition-normal);
    box-shadow: var(--ks-shadow-md);
}

[data-theme="dark"] .ks-theme-toggle {
    background: var(--ks-primary);
}

[data-theme="dark"] .ks-theme-toggle::after {
    transform: translateX(30px);
}

/* ============================================
   Utility Classes
   ============================================ */
.text-ks-primary { color: var(--ks-primary) !important; }
.text-ks-dark { color: var(--ks-dark) !important; }
.text-ks-light { color: var(--ks-light) !important; }
.text-ks-accent { color: var(--ks-accent) !important; }

.bg-ks-primary { background-color: var(--ks-primary) !important; }
.bg-ks-dark { background-color: var(--ks-dark) !important; }
.bg-ks-light { background-color: var(--ks-light) !important; }
.bg-ks-accent { background-color: var(--ks-accent) !important; }

.font-heading { font-family: var(--ks-font-heading) !important; }
.font-body { font-family: var(--ks-font-body) !important; }

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    h1, .h1 { font-size: var(--ks-text-4xl); }
    h2, .h2 { font-size: var(--ks-text-3xl); }
    h3, .h3 { font-size: var(--ks-text-2xl); }
    
    .ks-kpi-card .kpi-value {
        font-size: var(--ks-text-3xl);
    }
}

/* ============================================
   Page Transition Effects
   ============================================ */
.ks-page-transition {
    animation: ks-fade-in 0.4s ease-out;
}

@keyframes ks-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ks-page-transition-slide {
    animation: ks-slide-in 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes ks-slide-in {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Content fade in stagger effect */
.ks-stagger > * {
    opacity: 0;
    animation: ks-fade-in 0.4s ease-out forwards;
}

.ks-stagger > *:nth-child(1) { animation-delay: 0.05s; }
.ks-stagger > *:nth-child(2) { animation-delay: 0.1s; }
.ks-stagger > *:nth-child(3) { animation-delay: 0.15s; }
.ks-stagger > *:nth-child(4) { animation-delay: 0.2s; }
.ks-stagger > *:nth-child(5) { animation-delay: 0.25s; }
.ks-stagger > *:nth-child(6) { animation-delay: 0.3s; }

/* ============================================
   Modal Loading States
   ============================================ */
.modal.loading .modal-content {
    position: relative;
}

.modal.loading .modal-content::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: inherit;
}

.modal.loading .modal-body,
.modal.loading .modal-footer {
    opacity: 0.5;
    pointer-events: none;
}

/* Modal entrance animation */
.modal.fade .modal-dialog {
    transform: scale(0.95) translateY(-20px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal.show .modal-dialog {
    transform: scale(1) translateY(0);
}

/* ============================================
   Button Loading States
   ============================================ */
.btn.loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    top: 50%;
    left: 50%;
    margin-left: -9px;
    margin-top: -9px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: ks-btn-spin 0.6s linear infinite;
}

.btn.loading .btn-text {
    visibility: hidden;
}

.btn-ks-primary.loading::after,
.btn-primary.loading::after {
    border-color: rgba(255,255,255,0.3);
    border-top-color: white;
}

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

/* ============================================
   Progress Bar (Top of Page)
   ============================================ */
.ks-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--ks-primary), var(--ks-accent));
    z-index: 10000;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px var(--ks-primary);
}

.ks-progress-bar.active {
    animation: ks-progress 2s ease-in-out infinite;
}

@keyframes ks-progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 90%; }
}

/* ============================================
   Toast Notifications
   ============================================ */
.ks-toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9998;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ks-toast {
    background: white;
    border-radius: var(--ks-radius-lg);
    box-shadow: var(--ks-shadow-lg);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    animation: ks-toast-in 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.ks-toast.hiding {
    animation: ks-toast-out 0.3s ease-in forwards;
}

.ks-toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.ks-toast.success .ks-toast-icon { color: var(--ks-success); }
.ks-toast.error .ks-toast-icon { color: var(--ks-danger); }
.ks-toast.warning .ks-toast-icon { color: var(--ks-warning); }
.ks-toast.info .ks-toast-icon { color: var(--ks-info); }

.ks-toast-content {
    flex: 1;
}

.ks-toast-title {
    font-weight: 600;
    margin-bottom: 2px;
}

.ks-toast-message {
    font-size: 0.875rem;
    color: var(--ks-text-muted);
}

.ks-toast-close {
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.ks-toast-close:hover {
    opacity: 1;
}

@keyframes ks-toast-in {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes ks-toast-out {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}