/* Envelope Cross-Page Transition Styles
 * Story 13.2: Coordinate Cross-Page Animation Flow
 * 
 * Handles loading states, cross-page transitions, and maintains
 * envelope metaphor during redirect and network delays.
 */

/* Loading State Enhancements */
.envelope.loading {
    animation: envelope-pulse-enhanced 1.8s ease-in-out infinite;
}

.envelope.redirect-loading {
    animation: envelope-travel 2s ease-in-out infinite;
}

/* Enhanced Loading Text States */
.envelope-loading-text {
    position: absolute;
    top: 75%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    color: var(--envelope-text-color);
    opacity: 0;
    z-index: 5;
    text-align: center;
    font-style: italic;
    transition: opacity 0.3s ease;
}

.envelope.loading .envelope-loading-text {
    opacity: 0.8;
    animation: loading-text-pulse 2s ease-in-out infinite;
}

.envelope.redirect-loading .envelope-loading-text {
    opacity: 1;
    animation: loading-text-travel 2s ease-in-out infinite;
}

/* Loading Progress Indicators */
.envelope-progress-indicator {
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: rgba(212, 175, 55, 0.2);
    border-radius: 1px;
    overflow: hidden;
    opacity: 0;
    z-index: 5;
    transition: opacity 0.3s ease;
}

.envelope.slow-loading .envelope-progress-indicator {
    opacity: 1;
}

.envelope-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--envelope-gold) 0%, var(--envelope-seal-color) 100%);
    border-radius: 1px;
    width: 0%;
    animation: progress-fill 3s ease-out forwards;
}

/* Network-Specific Loading States */
.envelope.fast-network {
    animation-duration: 1.2s; /* Faster pulse for fast networks */
}

.envelope.slow-network {
    animation-duration: 2.5s; /* Slower pulse for slow networks */
}

.envelope.slow-network .envelope-loading-text::after {
    content: ' (this may take a moment)';
    font-size: 9px;
    opacity: 0.7;
}

/* Cross-Page Transition States */
.envelope.pre-redirect {
    transform: scale(1.02) translateY(-2px);
    box-shadow: 
        0 15px 40px var(--envelope-shadow), 
        0 0 25px var(--envelope-glow);
}

.envelope.redirecting {
    animation: envelope-prepare-travel 0.5s ease-out forwards;
}

.envelope.post-redirect {
    animation: envelope-arrive 0.8s ease-out forwards;
}

/* Device-Specific Optimizations */
@media (max-width: 768px) {
    .envelope-loading-text {
        font-size: 10px;
        top: 78%;
    }
    
    .envelope-progress-indicator {
        width: 70%;
        bottom: 8px;
    }
    
    .envelope.loading {
        animation-duration: 2.2s; /* Slightly slower on mobile */
    }
}

@media (max-width: 480px) {
    .envelope-loading-text {
        font-size: 9px;
        top: 80%;
    }
    
    .envelope-progress-indicator {
        width: 75%;
        bottom: 10px;
    }
}

/* High Performance Device Optimizations */
@media (min-width: 1024px) and (hover: hover) {
    .envelope.loading {
        animation-duration: 1.5s; /* Faster on desktop */
    }
    
    .envelope.redirect-loading {
        animation-duration: 1.8s;
    }
}

/* Timeout and Error States */
.envelope.timeout-warning {
    animation: envelope-timeout-shake 0.6s ease-in-out;
    border-color: #FFA500; /* Orange warning */
}

.envelope.connection-error {
    animation: envelope-error-pulse 1s ease-in-out infinite;
    border-color: #FF6B6B; /* Red error */
}

.envelope.timeout-warning .envelope-loading-text::after {
    content: ' - Taking longer than expected';
    color: #FFA500;
}

.envelope.connection-error .envelope-loading-text::after {
    content: ' - Connection issue detected';
    color: #FF6B6B;
}

/* Fallback Button for Long Delays */
.envelope-fallback-button {
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: var(--envelope-gold);
    color: white;
    border: none;
    border-radius: 15px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 6;
}

.envelope.show-fallback .envelope-fallback-button {
    opacity: 1;
    visibility: visible;
    animation: fallback-bounce-in 0.5s ease-out;
}

.envelope-fallback-button:hover {
    background: var(--envelope-seal-color);
    transform: translateX(-50%) translateY(-2px);
}

/* Animation Keyframes */
@keyframes envelope-pulse-enhanced {
    0%, 100% {
        box-shadow: 
            0 8px 25px var(--envelope-shadow), 
            0 0 5px var(--envelope-glow);
        transform: scale(1) translateY(0);
    }
    50% {
        box-shadow: 
            0 12px 35px var(--envelope-shadow), 
            0 0 20px var(--envelope-glow);
        transform: scale(1.01) translateY(-1px);
    }
}

@keyframes envelope-travel {
    0%, 100% {
        transform: translateY(0) scale(1);
        box-shadow: 
            0 8px 25px var(--envelope-shadow), 
            0 0 10px var(--envelope-glow);
    }
    25% {
        transform: translateY(-3px) scale(1.01);
        box-shadow: 
            0 15px 40px var(--envelope-shadow), 
            0 0 25px var(--envelope-glow);
    }
    75% {
        transform: translateY(-1px) scale(1.005);
        box-shadow: 
            0 10px 30px var(--envelope-shadow), 
            0 0 15px var(--envelope-glow);
    }
}

@keyframes loading-text-pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes loading-text-travel {
    0%, 100% { 
        opacity: 0.8; 
        transform: translateX(-50%) translateY(0);
    }
    50% { 
        opacity: 1; 
        transform: translateX(-50%) translateY(-2px);
    }
}

@keyframes progress-fill {
    0% { width: 0%; }
    30% { width: 45%; }
    60% { width: 70%; }
    90% { width: 95%; }
    100% { width: 100%; }
}

@keyframes envelope-prepare-travel {
    0% {
        transform: scale(1) translateY(0) rotate(0deg);
        box-shadow: 
            0 8px 25px var(--envelope-shadow), 
            0 0 10px var(--envelope-glow);
    }
    50% {
        transform: scale(1.05) translateY(-5px) rotate(1deg);
        box-shadow: 
            0 20px 50px var(--envelope-shadow), 
            0 0 30px var(--envelope-glow);
    }
    100% {
        transform: scale(1.02) translateY(-2px) rotate(0deg);
        box-shadow: 
            0 15px 40px var(--envelope-shadow), 
            0 0 20px var(--envelope-glow);
        opacity: 0.9;
    }
}

@keyframes envelope-arrive {
    0% {
        transform: scale(0.95) translateY(10px);
        opacity: 0.7;
        box-shadow: 0 5px 15px var(--envelope-shadow);
    }
    50% {
        transform: scale(1.02) translateY(-2px);
        opacity: 0.9;
        box-shadow: 
            0 15px 40px var(--envelope-shadow), 
            0 0 25px var(--envelope-glow);
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
        box-shadow: 
            0 8px 25px var(--envelope-shadow), 
            0 0 10px var(--envelope-glow);
    }
}

@keyframes envelope-timeout-shake {
    0%, 20%, 40%, 60%, 80%, 100% { 
        transform: translateX(0); 
    }
    10%, 30%, 50%, 70%, 90% { 
        transform: translateX(-3px); 
    }
}

@keyframes envelope-error-pulse {
    0%, 100% {
        box-shadow: 
            0 8px 25px var(--envelope-shadow), 
            0 0 10px rgba(255, 107, 107, 0.3);
    }
    50% {
        box-shadow: 
            0 8px 25px var(--envelope-shadow), 
            0 0 20px rgba(255, 107, 107, 0.6);
    }
}

@keyframes fallback-bounce-in {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px) scale(0.8);
    }
    60% {
        opacity: 1;
        transform: translateX(-50%) translateY(-5px) scale(1.05);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .envelope.loading,
    .envelope.redirect-loading,
    .envelope.timeout-warning,
    .envelope.connection-error {
        animation: none !important;
    }
    
    .envelope-loading-text,
    .envelope-progress-bar,
    .envelope-fallback-button {
        animation: none !important;
    }
    
    /* Provide alternative visual feedback */
    .envelope.loading {
        border-color: var(--envelope-gold);
        box-shadow: 0 0 15px var(--envelope-glow);
    }
    
    .envelope.redirect-loading {
        opacity: 0.9;
        transform: scale(1.02);
    }
    
    .envelope.timeout-warning {
        border-color: #FFA500;
    }
    
    .envelope.connection-error {
        border-color: #FF6B6B;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .envelope-progress-indicator {
        background: #000;
    }
    
    .envelope-progress-bar {
        background: #FFD700;
    }
    
    .envelope.timeout-warning {
        border-color: #FF8C00;
        border-width: 3px;
    }
    
    .envelope.connection-error {
        border-color: #FF0000;
        border-width: 3px;
    }
    
    .envelope-fallback-button {
        background: #000;
        color: #FFF;
        border: 2px solid #FFD700;
    }
}

/* Print Styles */
@media print {
    .envelope-loading-text,
    .envelope-progress-indicator,
    .envelope-fallback-button {
        display: none;
    }
    
    .envelope {
        animation: none !important;
        box-shadow: none;
        border: 2px solid #000;
    }
}

/* Focus and Keyboard Navigation */
.envelope-fallback-button:focus-visible {
    outline: 2px solid white;
    outline-offset: 2px;
    box-shadow: 0 0 10px var(--envelope-glow);
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .envelope-fallback-button {
        min-height: 44px;
        min-width: 44px;
        font-size: 12px;
        padding: 8px 18px;
        bottom: -60px;
    }
    
    .envelope-loading-text {
        font-size: 12px;
    }
}

/* Network Connection Indicators */
.envelope-network-indicator {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.envelope.show-network-indicator .envelope-network-indicator {
    opacity: 0.7;
}

.envelope-network-indicator.fast {
    background: #4CAF50; /* Green for fast */
}

.envelope-network-indicator.medium {
    background: #FF9800; /* Orange for medium */
}

.envelope-network-indicator.slow {
    background: #F44336; /* Red for slow */
    animation: slow-network-blink 2s ease-in-out infinite;
}

@keyframes slow-network-blink {
    0%, 50% { opacity: 0.7; }
    25%, 75% { opacity: 0.3; }
}

/* Performance Monitoring Overlay (Development Only) */
.envelope-performance-overlay {
    position: fixed;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px;
    font-size: 10px;
    font-family: monospace;
    border-radius: 4px;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
}

.envelope.show-performance .envelope-performance-overlay {
    opacity: 1;
}

/* Smooth Transitions Between States */
.envelope {
    transition: 
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        opacity 0.3s ease,
        transform 0.3s ease;
}

.envelope * {
    transition: opacity 0.3s ease;
}