/* NextSnap - Mobile-first responsive styles */

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f1729;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #4a90e2;
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;
    --offline: #757575;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #ffffff;
        --bg-secondary: #f5f5f5;
        --bg-tertiary: #e0e0e0;
        --text-primary: #212121;
        --text-secondary: #757575;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
                 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

#app {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
}

/* Utility classes */
.hidden {
    display: none !important;
}

.container {
    padding: 1rem;
}

.btn {
    display: block;
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    min-height: 48px;
}

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

.btn-primary:active {
    opacity: 0.8;
    transform: scale(0.98);
}

/* Top Bar */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    height: 56px;
}

.top-bar-content {
    max-width: 480px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.top-bar-indicators {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Connectivity Indicator */
.connectivity-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    position: relative;
}

.connectivity-indicator.online {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.connectivity-indicator.offline {
    background: var(--offline);
}

.connectivity-indicator.syncing {
    background: var(--warning);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* Pending Count Badge */
.pending-count {
    background: var(--error);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    min-width: 24px;
    text-align: center;
}

/* Main Content - Account for top bar and bottom nav */
#app {
    padding-top: 56px;
    padding-bottom: 70px;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-around;
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem 0;
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.2s;
    min-height: 56px;
    justify-content: center;
}

.nav-item:active {
    background: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    color: var(--accent);
}

.nav-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.nav-label {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Responsive adjustments for larger screens */
@media (min-width: 480px) {
    .top-bar-content,
    .bottom-nav {
        max-width: 480px;
        margin: 0 auto;
    }
}

/* Queue-specific improvements */
.btn-outline:active:not(:disabled) {
    opacity: 0.8;
    transform: scale(0.98);
}

.btn-outline:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Scrollbar styling for webkit browsers */
.queue-list::-webkit-scrollbar {
    width: 8px;
}

.queue-list::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.queue-list::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 4px;
}

.queue-list::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Loading animation */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn-icon.spinning {
    display: inline-block;
    animation: spin 1s linear infinite;
}

/* ============================================
   POLISH & ANIMATIONS - Module 14
   ============================================ */

/* Smooth page transitions */
#app {
    animation: fadeIn 0.3s ease-in;
}

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

/* Button interactions */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Ripple effect for buttons */
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* Enhanced connectivity indicator pulse */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
        box-shadow: 0 0 0 0 var(--warning);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
        box-shadow: 0 0 0 8px transparent;
    }
}

/* Smooth connectivity state transitions */
.connectivity-indicator {
    transition: all 0.3s ease;
}

/* Loading spinner enhancement */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Skeleton loader for content */
@keyframes shimmer {
    0% {
        background-position: -468px 0;
    }
    100% {
        background-position: 468px 0;
    }
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0px,
        rgba(255, 255, 255, 0.1) 40px,
        var(--bg-secondary) 80px
    );
    background-size: 800px 100px;
    animation: shimmer 2s infinite;
    border-radius: 4px;
}

/* Form input enhancements */
input:not([type="file"]),
textarea,
select {
    transition: all 0.2s ease;
}

input:focus:not([type="file"]),
textarea:focus,
select:focus {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.2);
}

/* Card hover effects */
.queue-item,
.thumbnail,
.file-item {
    transition: all 0.2s ease;
}

.queue-item:hover,
.thumbnail:hover,
.file-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Toast notification slide-in */
.toast {
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, 20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* Modal fade-in */
.modal {
    animation: modalFadeIn 0.2s ease-out;
}

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

.modal-content {
    animation: modalSlideUp 0.3s ease-out;
}

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

/* Navigation item active state */
.nav-item {
    position: relative;
    transition: all 0.2s ease;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-item.active::after,
.nav-item:hover::after {
    width: 80%;
}

/* Focus visible for accessibility */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Improve button focus states */
button:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Loading bar at top of page */
.loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
    transform-origin: left;
    animation: loadingBar 1s ease-in-out infinite;
    z-index: 9999;
}

@keyframes loadingBar {
    0% {
        transform: scaleX(0);
    }
    50% {
        transform: scaleX(0.5);
    }
    100% {
        transform: scaleX(1);
    }
}

/* Status badge animations */
.badge,
.status-badge {
    animation: badgeFadeIn 0.3s ease-out;
}

@keyframes badgeFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Image fade-in on load */
img {
    animation: imageFadeIn 0.4s ease-out;
}

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

/* Thumbnail grid stagger animation */
.photo-thumbnails .thumbnail {
    animation: staggerFadeIn 0.4s ease-out backwards;
}

.photo-thumbnails .thumbnail:nth-child(1) { animation-delay: 0.05s; }
.photo-thumbnails .thumbnail:nth-child(2) { animation-delay: 0.1s; }
.photo-thumbnails .thumbnail:nth-child(3) { animation-delay: 0.15s; }
.photo-thumbnails .thumbnail:nth-child(4) { animation-delay: 0.2s; }
.photo-thumbnails .thumbnail:nth-child(5) { animation-delay: 0.25s; }

@keyframes staggerFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced empty state */
.empty-state {
    animation: emptyStateFadeIn 0.5s ease-out;
}

@keyframes emptyStateFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Pending count badge bounce */
.pending-count {
    animation: badgeBounce 0.5s ease-out;
}

@keyframes badgeBounce {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

/* Enhanced spinner */
.spinner,
.spinner-small {
    animation: spin 1s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

/* Delete button shake on hover */
.queue-item-delete:hover,
.btn-danger:hover {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}

/* Success checkmark animation */
@keyframes checkmark {
    0% {
        transform: scale(0) rotate(0deg);
    }
    50% {
        transform: scale(1.2) rotate(180deg);
    }
    100% {
        transform: scale(1) rotate(360deg);
    }
}

.success-icon {
    animation: checkmark 0.6s ease-out;
}

/* Table row hover effect */
.user-table tr {
    transition: all 0.2s ease;
}

.user-table tr:hover {
    transform: scale(1.01);
}

/* Form validation feedback */
input:invalid:not(:placeholder-shown) {
    border-color: var(--error);
    animation: inputShake 0.3s;
}

input:valid:not(:placeholder-shown) {
    border-color: var(--success);
}

@keyframes inputShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
    .btn:hover:not(:disabled) {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    }
    
    input:focus:not([type="file"]),
    textarea:focus,
    select:focus {
        box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
    }
}

/* Progress bar for uploads */
.upload-progress {
    position: relative;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.upload-progress-bar {
    height: 100%;
    background: var(--accent);
    transition: width 0.3s ease;
    position: relative;
}

.upload-progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

/* Improved disabled state */
button:disabled,
.btn:disabled,
input:disabled {
    cursor: not-allowed;
    opacity: 0.5;
    filter: grayscale(50%);
}

/* Connection status pulse enhancement */
.connectivity-indicator.online {
    animation: successPulse 2s ease-in-out infinite;
}

@keyframes successPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(76, 175, 80, 0);
    }
}

/* Error state pulse */
.connectivity-indicator.offline {
    animation: errorPulse 2s ease-in-out infinite;
}

@keyframes errorPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Micro-interaction for clickable items */
[role="button"],
.clickable {
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
}

[role="button"]:active,
.clickable:active {
    transform: scale(0.97);
}

/* Smooth color transitions */
* {
    transition-property: color, background-color, border-color;
    transition-duration: 0.2s;
    transition-timing-function: ease;
}

/* Override for elements that shouldn't have color transitions */
button,
.btn,
input,
textarea,
select {
    transition-property: all;
}

/* Offline mode label */
.offline-label {
    font-size: 0.75rem;
    color: var(--offline, #888);
    font-weight: 600;
}

/* Logout button in top bar */
.logout-btn {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    cursor: pointer;
    min-height: 28px;
}

.logout-btn:active {
    opacity: 0.7;
}