/**
 * FamilyBusy - Design System
 * Basierend auf Duolingo Design Language
 * https://design.duolingo.com/
 */

/* =============================================
   CSS VARIABLEN / DESIGN TOKENS
   ============================================= */

:root {
    /* ===== DUOLINGO FARBPALETTE ===== */
    
    /* Feather Green - Das ikonische Duolingo-Grün */
    --color-feather: #58CC02;
    --color-feather-dark: #46A302;
    --color-feather-light: #89E219;
    
    /* Macaw Blue - Frisch und freundlich */
    --color-macaw: #1CB0F6;
    --color-macaw-dark: #1899D6;
    --color-macaw-light: #49C6FF;
    
    /* Bee Yellow - Warm und einladend */
    --color-bee: #FFC800;
    --color-bee-dark: #E5B400;
    --color-bee-light: #FFDE59;
    
    /* Fox Orange - Energie und Motivation */
    --color-fox: #FF9600;
    --color-fox-dark: #E58600;
    --color-fox-light: #FFB347;
    
    /* Cardinal Red - Warnung und Fehler */
    --color-cardinal: #FF4B4B;
    --color-cardinal-dark: #EA2B2B;
    --color-cardinal-light: #FF7878;
    
    /* Beetle Purple - Premium und Kreativität */
    --color-beetle: #CE82FF;
    --color-beetle-dark: #A855F7;
    --color-beetle-light: #E1A8FF;
    
    /* Neutrals - Duolingo Style */
    --color-eel: #3C3C3C;
    --color-wolf: #777777;
    --color-hare: #AFAFAF;
    --color-swan: #E5E5E5;
    --color-polar: #F7F7F7;
    --color-snow: #FFFFFF;
    
    /* Semantic Aliases */
    --color-primary: var(--color-feather);
    --color-primary-dark: var(--color-feather-dark);
    --color-primary-light: var(--color-feather-light);
    --color-secondary: var(--color-macaw);
    --color-secondary-dark: var(--color-macaw-dark);
    --color-secondary-light: var(--color-macaw-light);
    --color-accent: var(--color-beetle);
    --color-accent-dark: var(--color-beetle-dark);
    --color-accent-light: var(--color-beetle-light);
    --color-cta: var(--color-feather);
    --color-cta-dark: var(--color-feather-dark);
    --color-cta-light: var(--color-feather-light);
    
    /* Neutrals Aliases */
    --color-charcoal: var(--color-eel);
    --color-graphite: var(--color-wolf);
    --color-stone: var(--color-hare);
    --color-sand: var(--color-swan);
    --color-cream: var(--color-polar);
    --color-ivory: var(--color-polar);
    --color-white: var(--color-snow);
    
    /* Status Colors */
    --color-success: var(--color-feather);
    --color-success-dark: var(--color-feather-dark);
    --color-warning: var(--color-bee);
    --color-warning-dark: var(--color-bee-dark);
    --color-danger: var(--color-cardinal);
    --color-danger-dark: var(--color-cardinal-dark);
    --color-info: var(--color-macaw);
    --color-info-dark: var(--color-macaw-dark);
    
    /* Task Status */
    --color-open: var(--color-info);
    --color-in-progress: var(--color-secondary);
    --color-overdue: var(--color-danger);
    --color-completed: var(--color-primary);
    
    /* Text Colors */
    --text-primary: var(--color-charcoal);
    --text-secondary: var(--color-graphite);
    --text-muted: var(--color-stone);
    --text-inverse: var(--color-white);
    
    /* Background Colors (Warm & Organic) */
    --bg-primary: var(--color-white);
    --bg-secondary: var(--color-cream);
    --bg-tertiary: var(--color-sand);
    --bg-hover: rgba(91, 140, 81, 0.08);
    
    /* Border Colors */
    --border-light: var(--color-sand);
    --border-medium: var(--color-stone);
    --border-color: var(--color-sand);
    
    /* ===== SHADOWS (Weicher & Organischer) ===== */
    --shadow-sm: 0 2px 8px rgba(45, 45, 45, 0.06);
    --shadow-md: 0 4px 16px rgba(45, 45, 45, 0.08);
    --shadow-lg: 0 8px 32px rgba(45, 45, 45, 0.12);
    --shadow-xl: 0 16px 48px rgba(45, 45, 45, 0.16);
    --shadow-button: 0 4px 0 0;
    --shadow-soft: 0 4px 20px rgba(91, 140, 81, 0.15);
    
    /* ===== BORDER RADIUS (Kompakter) ===== */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* ===== SPACING ===== */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* ===== TYPOGRAPHY ===== */
    --font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-rounded: 'Nunito', 'Comic Sans MS', cursive;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* ===== TRANSITIONS ===== */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* ===== Z-INDEX ===== */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal-backdrop: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-tooltip: 600;
}

/* =============================================
   GOOGLE FONTS IMPORT
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&display=swap');

/* =============================================
   BASE STYLES
   ============================================= */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

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

/* =============================================
   TYPOGRAPHY
   ============================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-md);
}

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-macaw);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-macaw-dark);
    text-decoration: underline;
}

/* =============================================
   BUTTONS (Freud-Style: Elegant & Modern)
   ============================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    letter-spacing: 0.3px;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* Primary Button (Dunkel/Elegant wie Figma) */
.btn-primary {
    color: var(--color-white);
    background-color: var(--color-cta);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--color-cta-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Secondary Button (Outline Style) */
.btn-secondary {
    color: var(--color-cta);
    background-color: transparent;
    border: 2px solid var(--color-cta);
}

.btn-secondary:hover {
    background-color: var(--color-cta);
    color: var(--color-white);
}

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

/* Success/Green Button */
.btn-success {
    color: var(--color-white);
    background-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Danger Button */
.btn-danger {
    color: var(--color-white);
    background-color: var(--color-danger);
    box-shadow: var(--shadow-md);
}

.btn-danger:hover {
    background-color: var(--color-danger-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

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

/* Warning Button (Orange) */
.btn-warning {
    color: var(--color-charcoal);
    background-color: var(--color-secondary);
    box-shadow: var(--shadow-md);
}

.btn-warning:hover {
    background-color: var(--color-secondary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Accent Button (Lila) */
.btn-accent {
    color: var(--color-white);
    background-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.btn-accent:hover {
    background-color: var(--color-accent-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Ghost Button */
.btn-ghost {
    color: var(--text-secondary);
    background-color: transparent;
    padding: 12px 20px;
}

.btn-ghost:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* Soft Button (Subtle Background) */
.btn-soft {
    color: var(--color-primary);
    background-color: rgba(91, 140, 81, 0.12);
}

.btn-soft:hover {
    background-color: rgba(91, 140, 81, 0.2);
}

/* Button Sizes */
.btn-sm {
    padding: 10px 18px;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 18px 36px;
    font-size: var(--font-size-lg);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Disabled State */
.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Icon-only Button */
.btn-icon-only {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-md);
}

/* =============================================
   CARDS (Soft & Organic)
   ============================================= */

.card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-light);
    background-color: rgba(245, 243, 239, 0.5);
}

.card-header h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: 0;
    font-size: var(--font-size-lg);
}

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

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-light);
    background-color: var(--bg-secondary);
}

/* Interactive Card */
.card-interactive {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.card-interactive:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-interactive:active {
    transform: translateY(-2px);
}

/* Highlighted Card */
.card-highlight {
    border: 2px solid var(--color-primary);
    background: linear-gradient(135deg, rgba(91, 140, 81, 0.03), rgba(91, 140, 81, 0.08));
}

/* Gradient Card Header */
.card-header-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    border-bottom: none;
}

.card-header-gradient h3 {
    color: var(--color-white);
}

/* =============================================
   FORMS
   ============================================= */

.form-group {
    margin-bottom: var(--space-lg);
}

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Custom Select Styling */
.form-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 44px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 18px;
    cursor: pointer;
}

.form-select:hover {
    border-color: var(--border-medium);
}

.form-select option {
    padding: var(--space-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: var(--bg-secondary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-macaw);
    box-shadow: 0 0 0 3px rgba(28, 176, 246, 0.2);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-cardinal);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
    box-shadow: 0 0 0 3px rgba(255, 75, 75, 0.2);
}

.form-error {
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-cardinal);
}

.form-hint {
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-check-input {
    width: 24px;
    height: 24px;
    accent-color: var(--color-feather);
    cursor: pointer;
}

.form-check-label {
    font-weight: var(--font-weight-medium);
    cursor: pointer;
}

/* =============================================
   BADGES
   ============================================= */

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
}

.badge-success {
    color: var(--text-inverse);
    background-color: var(--color-feather);
}

.badge-warning {
    color: var(--text-primary);
    background-color: var(--color-bee);
}

.badge-danger {
    color: var(--text-inverse);
    background-color: var(--color-cardinal);
}

.badge-info {
    color: var(--text-inverse);
    background-color: var(--color-macaw);
}

.badge-neutral {
    color: var(--text-primary);
    background-color: var(--color-swan);
}

/* =============================================
   PROGRESS BAR
   ============================================= */

.progress {
    height: 16px;
    background-color: var(--color-swan);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-feather);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-bar.warning {
    background-color: var(--color-bee);
}

.progress-bar.danger {
    background-color: var(--color-cardinal);
}

/* Striped Animation */
.progress-bar.striped {
    background-image: linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.15) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.15) 50%,
        rgba(255, 255, 255, 0.15) 75%,
        transparent 75%,
        transparent
    );
    background-size: 1rem 1rem;
    animation: progress-stripes 1s linear infinite;
}

@keyframes progress-stripes {
    from { background-position: 1rem 0; }
    to { background-position: 0 0; }
}

/* =============================================
   AVATARS
   ============================================= */

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-weight: var(--font-weight-bold);
    color: var(--text-inverse);
    background-color: var(--color-macaw);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-sm);
}

.avatar-xs {
    width: 24px;
    height: 24px;
    font-size: 10px;
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: var(--font-size-xl);
}

.avatar-xl {
    width: 96px;
    height: 96px;
    font-size: var(--font-size-3xl);
}

/* Avatar Group */
.avatar-group {
    display: flex;
}

.avatar-group .avatar {
    margin-left: -12px;
    border: 3px solid var(--bg-primary);
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

/* =============================================
   POINTS DISPLAY
   ============================================= */

.points {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-bee-dark);
    background-color: rgba(255, 200, 0, 0.2);
    border-radius: var(--radius-full);
}

.points-icon {
    font-size: var(--font-size-lg);
}

.points-lg {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-xl);
}

.points-lg .points-icon {
    font-size: var(--font-size-2xl);
}

/* =============================================
   STREAK DISPLAY
   ============================================= */

.streak {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-fox-dark);
    background-color: rgba(255, 150, 0, 0.2);
    border-radius: var(--radius-full);
}

.streak-icon {
    font-size: var(--font-size-lg);
}

/* =============================================
   ALERTS / TOASTS - Freud Style
   ============================================= */

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-md);
    border: 1px solid transparent;
}

.alert-success {
    color: var(--color-primary-dark);
    background-color: rgba(91, 140, 81, 0.1);
    border-color: rgba(91, 140, 81, 0.2);
}

.alert-warning {
    color: var(--color-secondary-dark);
    background-color: rgba(232, 165, 75, 0.1);
    border-color: rgba(232, 165, 75, 0.2);
}

.alert-danger {
    color: var(--color-danger-dark);
    background-color: rgba(217, 83, 79, 0.1);
    border-color: rgba(217, 83, 79, 0.2);
}

.alert-info {
    color: var(--color-info-dark);
    background-color: rgba(93, 173, 226, 0.1);
    border-color: rgba(93, 173, 226, 0.2);
}

.alert-link {
    font-weight: var(--font-weight-bold);
    margin-left: var(--space-sm);
}

.alert-icon {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-xs);
}

.alert-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* Toast Container */
.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-eel);
    color: var(--text-inverse);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: toast-slide-in 0.3s ease;
}

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

/* =============================================
   MODAL
   ============================================= */

.modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 90%;
    max-width: 500px;
    max-height: 85vh;
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 2px solid var(--border-light);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-secondary);
}

.modal-header {
    flex-shrink: 0;
}

.modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-top: 2px solid var(--border-light);
    background-color: var(--bg-secondary);
    flex-shrink: 0;
}

/* =============================================
   LOADING STATES
   ============================================= */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-light);
    border-top-color: var(--color-feather);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 24px;
    height: 24px;
    border-width: 3px;
}

.spinner-lg {
    width: 64px;
    height: 64px;
    border-width: 6px;
}

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

.skeleton {
    background: linear-gradient(90deg, var(--color-swan) 25%, var(--color-polar) 50%, var(--color-swan) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

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

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

/* Text */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--color-feather) !important; }
.text-warning { color: var(--color-bee-dark) !important; }
.text-danger { color: var(--color-cardinal) !important; }
.text-info { color: var(--color-macaw) !important; }
.text-primary { color: var(--color-primary) !important; }
.text-accent { color: var(--color-accent) !important; }

/* Font Weight */
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-extrabold { font-weight: var(--font-weight-extrabold); }

/* Spacing */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-sm); }
.p-2 { padding: var(--space-md); }
.p-3 { padding: var(--space-lg); }
.p-4 { padding: var(--space-xl); }

/* Flex */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }
.gap-4 { gap: var(--space-xl); }

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

/* Width/Height */
.w-full { width: 100%; }
.h-full { height: 100%; }

/* Visibility */
.hidden { display: none; }
.invisible { visibility: hidden; }

/* =============================================
   ANIMATIONS
   ============================================= */

/* Bounce Animation für Punkte */
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-bounce {
    animation: bounce 0.5s ease-in-out;
}

/* Pulse für Benachrichtigungen */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Shake für Fehler */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.animate-shake {
    animation: shake 0.3s ease-in-out;
}

/* Fade In */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* Slide Up */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-up {
    animation: slideUp 0.3s ease-out;
}

/* Confetti für Erfolge */
@keyframes confetti {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(-200px) rotate(720deg); opacity: 0; }
}

/* Scale Pop */
@keyframes scalePop {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.animate-scale-pop {
    animation: scalePop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}