/* ===== UI POLISH - ANIMATIONS & LOADING STATES ===== */

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

/* Global loading spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.2);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner.large {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

/* Full page loader */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    gap: 16px;
}

.page-loader-text {
    color: #667eea;
    font-weight: 500;
}

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

.skeleton-text { height: 16px; margin-bottom: 8px; }
.skeleton-title { height: 24px; width: 60%; margin-bottom: 12px; }
.skeleton-card { height: 120px; border-radius: 12px; }

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

/* Button loading state */
.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: -9px 0 0 -9px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

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

/* Fade in */
.fade-in {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Slide up */
.slide-up {
    animation: slideUp 0.3s ease-out;
}

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

/* Slide in from right */
.slide-in-right {
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Scale in */
.scale-in {
    animation: scaleIn 0.2s ease-out;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* Staggered list items */
.stagger-item { opacity: 0; animation: fadeIn 0.3s ease-out forwards; }
.stagger-item:nth-child(1) { animation-delay: 0.05s; }
.stagger-item:nth-child(2) { animation-delay: 0.1s; }
.stagger-item:nth-child(3) { animation-delay: 0.15s; }
.stagger-item:nth-child(4) { animation-delay: 0.2s; }
.stagger-item:nth-child(5) { animation-delay: 0.25s; }

/* ===== MICRO-INTERACTIONS ===== */

/* Hover lift effect */
.hover-lift {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Press effect */
.press-effect:active {
    transform: scale(0.98);
}

/* Ripple effect on buttons */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.ripple:active::before {
    width: 200%;
    height: 200%;
}

/* ===== TOAST NOTIFICATIONS ===== */

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 14px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    animation: slideInRight 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 350px;
}

.toast-success { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.toast-error { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
.toast-warning { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.toast-info { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }

.toast-close {
    background: none;
    border: none;
    color: white;
    opacity: 0.7;
    cursor: pointer;
    padding: 0 0 0 10px;
    font-size: 18px;
}

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

/* ===== PROGRESS INDICATORS ===== */

/* Progress bar */
.progress-bar {
    height: 6px;
    background: #e5e7eb;
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* Circular progress */
.progress-circle {
    width: 60px;
    height: 60px;
    transform: rotate(-90deg);
}

.progress-circle-bg {
    fill: none;
    stroke: #e5e7eb;
    stroke-width: 6;
}

.progress-circle-fill {
    fill: none;
    stroke: #667eea;
    stroke-width: 6;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease;
}

/* ===== TRANSITIONS ===== */

/* Smooth view transitions */
.view {
    transition: opacity 0.2s ease;
}

.view.transitioning {
    opacity: 0;
}

/* Card hover */
.card {
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* Input focus */
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    transition: border-color 0.2s, box-shadow 0.2s;
}

/* ===== ENHANCED BUTTONS ===== */

.btn-primary, .btn-secondary {
    transition: all 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary:hover {
    background: #f3f4f6;
}

/* ===== SUCCESS/ERROR STATES ===== */

.success-checkmark {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #10b981;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.3s ease-out;
}

.success-checkmark::after {
    content: '✓';
    color: white;
    font-size: 30px;
    font-weight: bold;
}

.error-x {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #ef4444;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.3s ease-out;
}

.error-x::after {
    content: '✕';
    color: white;
    font-size: 30px;
    font-weight: bold;
}