/* ==========================================================================
   Components: Post Card, Buttons, Modals, Stories Ring, Toasts & Micro-UI
   ========================================================================== */

/* Post Card */
.post-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal), border-color var(--transition-fast);
}

.post-card:hover {
    box-shadow: var(--shadow-md);
}

.post-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
}

.post-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Avatar & Story Rings */
.avatar-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--bg-input);
    border: 1.5px solid var(--border-subtle);
    transition: transform var(--transition-fast);
}

.avatar:hover {
    transform: scale(1.04);
}

.avatar-sm {
    width: 32px;
    height: 32px;
}

.avatar-md {
    width: 48px;
    height: 48px;
}

.avatar-lg {
    width: 88px;
    height: 88px;
}

.avatar-xl {
    width: 110px;
    height: 110px;
}

.story-ring-active {
    padding: 2.5px;
    background: var(--gradient-story);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.story-ring-active:hover {
    transform: scale(1.05);
}

.story-ring-active .avatar {
    border: 2px solid var(--bg-surface);
}

/* Verified & Online Badges */
.badge-verified {
    color: #38BDF8;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
}

.online-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--success);
    border: 2px solid var(--bg-surface);
    position: absolute;
    bottom: 0;
    right: 0;
}

.post-user-info .username {
    font-weight: 700;
    font-size: 14px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 5px;
}

.post-user-info .time {
    font-size: 12px;
    color: var(--text-muted);
}

/* Post Media Display */
.post-media-container {
    position: relative;
    width: 100%;
    background-color: #000;
    overflow: hidden;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.post-media-container img,
.post-media-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

/* Double-Tap Heart Burst Particle Animations */
.heart-burst-overlay {
    position: absolute;
    font-size: 90px;
    color: #FFF;
    filter: drop-shadow(0 8px 24px rgba(255, 45, 85, 0.7));
    pointer-events: none;
    display: none;
    z-index: 15;
}

.heart-burst-overlay.animate {
    display: block;
    animation: heartBurst 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* Post Actions Bar */
.post-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px 8px 18px;
}

.action-buttons-left {
    display: flex;
    align-items: center;
    gap: 18px;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 22px;
    color: var(--text-main);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.action-btn:hover {
    transform: scale(1.15);
}

.action-btn:active {
    transform: scale(0.9);
}

.action-btn.liked {
    color: var(--like);
}

.action-btn.liked i {
    animation: bounceScale 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.action-btn.saved {
    color: var(--primary);
}

.action-btn span {
    font-size: 14px;
    font-weight: 700;
}

/* Post Caption & Hashtags */
.post-content {
    padding: 0 18px 14px 18px;
    font-size: 14px;
    line-height: 1.5;
}

.post-caption .username {
    font-weight: 700;
    margin-right: 6px;
    color: var(--text-main);
}

.post-hashtag {
    color: var(--primary);
    font-weight: 600;
    transition: opacity var(--transition-fast);
}

.post-hashtag:hover {
    text-decoration: underline;
    opacity: 0.85;
}

.view-comments-btn {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 6px;
    display: inline-block;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.view-comments-btn:hover {
    color: var(--primary);
}

/* Quick Inline Comment Input */
.post-quick-comment-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface);
}

.quick-comment-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 13px;
    color: var(--text-main);
    outline: none;
}

.quick-comment-input::placeholder {
    color: var(--text-subtle);
}

.quick-comment-submit {
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
    opacity: 0.7;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.quick-comment-submit:hover {
    opacity: 1;
    transform: scale(1.05);
}

.quick-emoji-pills {
    display: flex;
    gap: 6px;
}

.emoji-pill {
    cursor: pointer;
    font-size: 16px;
    transition: transform var(--transition-fast);
}

.emoji-pill:hover {
    transform: scale(1.3);
}

/* ==========================================================================
   Buttons (Standard, Gradient & Glass)
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: -0.2px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #FFF;
    box-shadow: 0 4px 14px rgba(255, 45, 85, 0.35);
}

.btn-primary:hover {
    background: var(--gradient-primary-hover);
    box-shadow: 0 6px 20px rgba(255, 45, 85, 0.5);
    transform: translateY(-1.5px);
}

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

.btn-secondary {
    background-color: var(--bg-surface-hover);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-active);
    border-color: var(--text-muted);
}

.btn-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-glass:hover {
    background: var(--bg-surface-hover);
    box-shadow: var(--shadow-sm);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-main);
}

/* ==========================================================================
   Form Inputs & Dropzones
   ========================================================================== */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
}

.form-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border-color);
    background-color: var(--bg-input);
    color: var(--text-main);
    outline: none;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.form-input:focus {
    border-color: var(--primary);
    background-color: var(--bg-input-focus);
    box-shadow: 0 0 0 4px var(--primary-light);
}

/* Drag and Drop Zone */
.upload-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 20px;
    text-align: center;
    background: var(--bg-surface-hover);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: scale(1.01);
}

.upload-dropzone i {
    font-size: 40px;
    color: var(--primary);
}

/* Upload Preview Gallery */
.upload-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.upload-preview-item {
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.upload-preview-item img,
.upload-preview-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-preview-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: #FFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.upload-preview-item .remove-btn:hover {
    transform: scale(1.2);
    background: var(--primary);
}

/* ==========================================================================
   Modals & Popups
   ========================================================================== */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.68);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal);
}

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

.modal-dialog {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 92%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    transform: scale(0.92) translateY(20px);
    transition: all var(--transition-spring);
}

.modal-backdrop.show .modal-dialog {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 800;
    color: var(--text-main);
}

.modal-body {
    padding: 24px;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

/* AI Sparkle Button */
.btn-ai-sparkle {
    background: linear-gradient(135deg, #6366F1 0%, #A855F7 50%, #EC4899 100%);
    color: #FFF;
    border: none;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 2px 10px rgba(168, 85, 247, 0.4);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.btn-ai-sparkle:hover {
    box-shadow: 0 4px 16px rgba(168, 85, 247, 0.6);
    transform: scale(1.04);
}

/* ==========================================================================
   Toasts with Progress Bars
   ========================================================================== */

#toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 2500;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-left: 5px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    animation: slideUpFade 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    min-width: 280px;
    max-width: 400px;
}

.toast.toast-success {
    border-left-color: var(--success);
}

.toast.toast-error {
    border-left-color: var(--primary);
}

.toast.toast-info {
    border-left-color: var(--secondary);
}

/* Tab Bar Navigation */
.tab-nav-container {
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
    gap: 32px;
    justify-content: center;
}

.tab-nav-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 4px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-nav-item:hover {
    color: var(--text-main);
}

.tab-nav-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ==========================================================================
   Interactive Realtime Social Notification Toast
   ========================================================================== */

.toast-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    font-size: 16px;
    display: flex;
    align-items: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.toast-close-btn:hover {
    color: var(--text-main);
    background: var(--bg-surface-hover);
}

.interactive-notification-toast {
    position: relative;
    width: 360px;
    max-width: calc(100vw - 32px);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.16), 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    cursor: pointer;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    animation: toastSlideInRight 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.interactive-notification-toast:hover {
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 16px 44px rgba(0, 0, 0, 0.22);
    border-color: rgba(255, 45, 85, 0.3);
}

.notif-toast-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 40px 14px 14px;
}

.notif-toast-avatar-wrapper {
    position: relative;
    flex-shrink: 0;
}

.notif-toast-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-subtle);
}

.notif-type-icon {
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: #FFF;
    border: 2px solid var(--bg-surface);
}

.notif-type-icon.like { background: linear-gradient(135deg, #FF2D55, #FF5E7E); }
.notif-type-icon.comment { background: linear-gradient(135deg, #007AFF, #5856D6); }
.notif-type-icon.follow { background: linear-gradient(135deg, #34C759, #30D158); }
.notif-type-icon.mention { background: linear-gradient(135deg, #AF52DE, #BF5AF2); }
.notif-type-icon.message { background: linear-gradient(135deg, #00C7BE, #32ADE6); }

.notif-toast-content {
    flex: 1;
    min-width: 0;
    font-size: 13.5px;
    line-height: 1.35;
}

.notif-toast-text {
    color: var(--text-main);
    word-break: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.notif-actor-name {
    font-weight: 800;
    color: var(--text-main);
}

.notif-toast-snippet {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-top: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.notif-toast-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11.5px;
    color: var(--text-muted);
    margin-top: 4px;
}

.notif-action-hint {
    color: var(--primary);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.notif-toast-thumb {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.notif-toast-close {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    cursor: pointer;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.notif-toast-close:hover {
    background: var(--bg-surface-hover);
    color: var(--text-main);
}

.notif-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 100%;
    background: var(--gradient-primary);
    animation: toastProgress 5.5s linear forwards;
    transform-origin: left;
}

@keyframes toastProgress {
    from { width: 100%; }
    to { width: 0%; }
}

@keyframes toastSlideInRight {
    from {
        opacity: 0;
        transform: translateX(80px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* ==========================================================================
   Navigation Badges & Counters
   ========================================================================== */

.nav-badge {
    position: absolute;
    right: 14px;
    background: var(--gradient-primary);
    color: #FFF;
    font-size: 11px;
    font-weight: 800;
    min-width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
    box-shadow: 0 2px 8px rgba(255, 45, 85, 0.4);
    animation: popBadge 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popBadge {
    0% { transform: scale(0.5); opacity: 0; }
    70% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

/* ==========================================================================
   Global Desktop Top Header Nav
   ========================================================================== */

.app-top-header {
    position: sticky;
    top: 0;
    z-index: 90;
    height: 64px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    margin: -28px -24px 24px -24px;
    transition: background-color var(--transition-normal);
}

.header-search-box {
    position: relative;
    width: 380px;
    max-width: 100%;
}

.header-search-input {
    width: 100%;
    padding: 9px 16px 9px 40px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-main);
    font-size: 13.5px;
    outline: none;
    transition: all var(--transition-fast);
}

.header-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
    background: var(--bg-surface);
    width: 440px;
}

.header-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
    pointer-events: none;
}

.header-search-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    z-index: 200;
    display: none;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.header-actions-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-btn-create {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: #FFF;
    font-size: 13.5px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(255, 45, 85, 0.35);
    transition: all var(--transition-fast);
}

.header-btn-create:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(255, 45, 85, 0.45);
}

.header-icon-btn {
    position: relative;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.header-icon-btn:hover {
    background: var(--bg-surface-hover);
    color: var(--primary);
    transform: scale(1.05);
}

.header-icon-badge {
    position: absolute;
    top: -3px;
    right: -3px;
    background: var(--primary);
    color: #FFF;
    font-size: 10px;
    font-weight: 900;
    min-width: 17px;
    height: 17px;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    border: 2px solid var(--bg-surface);
}

.header-user-status-chip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 4px 14px 4px 4px;
    border-radius: var(--radius-full);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-main);
    transition: all var(--transition-fast);
}

.header-user-status-chip:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-subtle);
}

.online-pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 0 2px var(--bg-surface);
}