/**
 * Apple-Style Design System for EVOS Service Desk
 * Inspired by iOS, macOS design principles
 * - Minimalism, clarity, depth
 * - Smooth animations and transitions
 * - Glassmorphism effects
 * - Subtle shadows and gradients
 */

/* ==================== CSS Variables (Design Tokens) ==================== */
:root {
    /* Colors - Apple-inspired palette */
    --apple-blue: #007AFF;
    --apple-blue-dark: #0051D5;
    --apple-blue-light: #5AC8FA;
    --apple-green: #34C759;
    --apple-orange: #FF9500;
    --apple-red: #FF3B30;
    --apple-purple: #AF52DE;
    --apple-pink: #FF2D55;
    --apple-yellow: #FFCC00;

    /* Neutrals */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F7;
    --gray-200: #E5E5EA;
    --gray-300: #D1D1D6;
    --gray-400: #C7C7CC;
    --gray-500: #AEAEB2;
    --gray-600: #8E8E93;
    --gray-700: #636366;
    --gray-800: #48484A;
    --gray-900: #1C1C1E;

    /* Backgrounds */
    --bg-primary: #FFFFFF;
    --bg-secondary: var(--gray-100);
    --bg-tertiary: var(--gray-50);
    --bg-elevated: #FFFFFF;

    /* Text colors */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-600);
    --text-quaternary: var(--gray-500);

    /* Borders */
    --border-light: var(--gray-200);
    --border-medium: var(--gray-300);

    /* Shadows - Multiple layers for depth */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Blur for glassmorphism */
    --blur-sm: blur(8px);
    --blur-md: blur(16px);
    --blur-lg: blur(24px);

    /* Spacing - 8px base unit */
    --space-1: 0.25rem; /* 4px */
    --space-2: 0.5rem;  /* 8px */
    --space-3: 0.75rem; /* 12px */
    --space-4: 1rem;    /* 16px */
    --space-5: 1.25rem; /* 20px */
    --space-6: 1.5rem;  /* 24px */
    --space-8: 2rem;    /* 32px */
    --space-10: 2.5rem; /* 40px */
    --space-12: 3rem;   /* 48px */
    --space-16: 4rem;   /* 64px */

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Menlo, Monaco, "Courier New", monospace;
}

/* Dark mode variables */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: var(--gray-900);
        --bg-tertiary: var(--gray-800);
        --bg-elevated: var(--gray-900);

        --text-primary: #FFFFFF;
        --text-secondary: var(--gray-300);
        --text-tertiary: var(--gray-400);
        --text-quaternary: var(--gray-500);

        --border-light: var(--gray-800);
        --border-medium: var(--gray-700);
    }
}

/* ==================== Base Styles ==================== */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.5;
}

/* ==================== Apple-Style Cards ==================== */
.apple-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    overflow: hidden;
}

.apple-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.apple-card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

@media (prefers-color-scheme: dark) {
    .apple-card-glass {
        background: rgba(28, 28, 30, 0.7);
    }
}

/* ==================== Buttons ==================== */
.apple-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    outline: none;
    position: relative;
    overflow: hidden;
}

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

.apple-btn-primary {
    background: var(--apple-blue);
    color: white;
}

.apple-btn-primary:hover {
    background: var(--apple-blue-dark);
    box-shadow: var(--shadow-md);
}

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

.apple-btn-secondary:hover {
    background: var(--gray-200);
}

.apple-btn-success {
    background: var(--apple-green);
    color: white;
}

.apple-btn-danger {
    background: var(--apple-red);
    color: white;
}

.apple-btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
}

.apple-btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: 1.0625rem;
}

/* Button ripple effect */
.apple-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width var(--transition-spring), height var(--transition-spring);
}

.apple-btn:active::after {
    width: 300px;
    height: 300px;
}

/* ==================== Inputs ==================== */
.apple-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    outline: none;
}

.apple-input:focus {
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.apple-input::placeholder {
    color: var(--text-quaternary);
}

/* ==================== Tags/Badges ==================== */
.apple-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
}

.apple-tag-blue {
    background: rgba(0, 122, 255, 0.1);
    color: var(--apple-blue);
}

.apple-tag-green {
    background: rgba(52, 199, 89, 0.1);
    color: var(--apple-green);
}

.apple-tag-orange {
    background: rgba(255, 149, 0, 0.1);
    color: var(--apple-orange);
}

.apple-tag-red {
    background: rgba(255, 59, 48, 0.1);
    color: var(--apple-red);
}

/* ==================== Kanban Board Specific ==================== */
.kanban-board {
    display: flex;
    gap: var(--space-4);
    overflow-x: auto;
    padding: var(--space-4);
    min-height: calc(100vh - 200px);
}

.kanban-column {
    flex: 0 0 320px;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    max-height: calc(100vh - 220px);
}

.kanban-column-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.kanban-column-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.kanban-column-count {
    background: var(--gray-300);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    min-width: 24px;
    text-align: center;
}

.kanban-cards {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.kanban-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    cursor: grab;
    transition: all var(--transition-base);
}

.kanban-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.kanban-card:active {
    cursor: grabbing;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.kanban-card.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
}

.kanban-card-title {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.4;
}

.kanban-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ==================== Filters ==================== */
.apple-filters {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
}

.apple-filter-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--gray-100);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.apple-filter-chip:hover {
    background: var(--gray-200);
}

.apple-filter-chip.active {
    background: var(--apple-blue);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* ==================== Loading Spinner ==================== */
.apple-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-top-color: var(--apple-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== Animations ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in {
    animation: fadeIn var(--transition-base);
}

.slide-in {
    animation: slideIn var(--transition-slow);
}

/* ==================== Utilities ==================== */
.apple-divider {
    height: 1px;
    background: var(--border-light);
    border: none;
    margin: var(--space-4) 0;
}

.apple-text-sm {
    font-size: 0.875rem;
}

.apple-text-xs {
    font-size: 0.75rem;
}

.apple-font-medium {
    font-weight: 500;
}

.apple-font-semibold {
    font-weight: 600;
}

/* ==================== Scrollbar Styling ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .kanban-board {
        flex-direction: column;
    }

    .kanban-column {
        flex: 1 1 auto;
        max-height: none;
    }
}