/**
 * Follow System Styles
 * Production-ready CSS for CinemaPointer Follow System Components
 * Version: 1.0.0
 */

/* =============================================================================
   CSS Variables & Base Configuration
   ============================================================================= */
:root {
    --follow-primary: #F9A926;
    --follow-primary-hover: #ffb84d;
    --follow-secondary: rgba(255, 255, 255, 0.1);
    --follow-secondary-hover: rgba(255, 255, 255, 0.2);
    --follow-background: rgba(255, 255, 255, 0.05);
    --follow-border: rgba(255, 255, 255, 0.1);
    --follow-text-primary: #ffffff;
    --follow-text-secondary: rgba(255, 255, 255, 0.7);
    --follow-text-muted: rgba(255, 255, 255, 0.5);
    --follow-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --follow-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.4);
    --follow-radius: 16px;
    --follow-radius-sm: 12px;
    --follow-radius-pill: 25px;
    --follow-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================================================
   Follow Button Component
   ============================================================================= */
.follow-btn {
    font-weight: 500;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    transition: var(--follow-transition);
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}

.follow-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(249, 169, 38, 0.3);
}

/* Default (Follow) State */
.follow-btn:not(.btn-outline-light) {
    background: linear-gradient(135deg, var(--follow-primary), var(--follow-primary-hover));
    border-color: var(--follow-primary);
    color: var(--black, #000000) !important;
}

.follow-btn:not(.btn-outline-light):hover {
    background: linear-gradient(135deg, var(--follow-primary-hover), var(--follow-primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(249, 169, 38, 0.4);
}

/* Following (Unfollow) State */
.follow-btn.btn-outline-light {
    background: transparent;
    border-color: var(--follow-secondary);
    color: var(--follow-text-secondary) !important;
}

.follow-btn.btn-outline-light:hover {
    background: var(--follow-secondary-hover);
    border-color: var(--follow-secondary-hover);
    color: var(--follow-text-primary) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.1);
}

/* Active States */
.follow-btn:active {
    transform: translateY(0) !important;
}

/* Loading State */
.follow-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.follow-btn.loading i {
    animation: spin 1s linear infinite;
}

/* Size Variants */
.follow-btn.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.85rem;
    border-radius: var(--follow-radius-sm);
}

.follow-btn.btn-md {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: var(--follow-radius);
}

.follow-btn.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: var(--follow-radius);
}

/* Ripple Effect */
.follow-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;
    pointer-events: none;
    z-index: 0;
}

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

.follow-btn > * {
    position: relative;
    z-index: 1;
}

/* =============================================================================
   User Follow Card Component
   ============================================================================= */
.user-follow-card {
    background: linear-gradient(135deg, var(--follow-background), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--follow-border);
    border-radius: var(--follow-radius);
    backdrop-filter: blur(10px);
    transition: var(--follow-transition);
    cursor: pointer;
    position: relative;
}

.user-follow-card:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
    border-color: rgba(249, 169, 38, 0.3);
    transform: translateY(-2px);
    box-shadow: var(--follow-shadow-hover);
}

/* Avatar Styles */
.user-avatar {
    position: relative;
    flex-shrink: 0;
}

.avatar-sm { width: 40px; height: 40px; }
.avatar-md { width: 50px; height: 50px; }
.avatar-lg { width: 60px; height: 60px; }

.avatar-img {
    object-fit: cover;
    border: 2px solid rgba(249, 169, 38, 0.3);
    transition: border-color 0.3s ease;
}

.user-follow-card:hover .avatar-img {
    border-color: var(--follow-primary);
}

.avatar-placeholder {
    background: linear-gradient(135deg, var(--follow-primary), var(--follow-primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    color: var(--black, #000000);
}

/* Online Indicator */
.online-indicator {
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 12px;
    height: 12px;
    background: #17cf45;
    border: 2px solid var(--black, #000000);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

/* User Info Styles */
.user-name {
    color: var(--follow-text-primary);
    font-weight: 600;
    margin: 0;
    line-height: 1.3;
}

.user-username {
    color: var(--follow-text-muted);
    font-size: 0.85rem;
    margin: 0;
}

.user-stats {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
}

.stat-item {
    color: var(--follow-text-secondary);
    display: flex;
    align-items: center;
}

.stat-item i {
    font-size: 0.75em;
    margin-right: 0.25rem;
}

/* Card Size Variants */
.user-card-sm {
    padding: 0.75rem !important;
}

.user-card-sm .user-name {
    font-size: 0.9rem;
}

.user-card-sm .user-username,
.user-card-sm .user-stats {
    font-size: 0.75rem;
}

.user-card-lg .user-name {
    font-size: 1.1rem;
}

.user-card-lg .user-username {
    font-size: 0.9rem;
}

.user-card-lg .user-stats {
    font-size: 0.85rem;
}

/* =============================================================================
   Follow Modal Component
   ============================================================================= */
.follow-modal .modal-content {
    background: linear-gradient(135deg, rgba(18, 18, 18, 0.95), rgba(18, 18, 18, 0.9));
    border: 1px solid var(--follow-border);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    box-shadow: var(--follow-shadow);
}

.follow-modal .modal-header {
    border: none;
    padding: 1.5rem 1.5rem 0.5rem 1.5rem;
}

.follow-modal .modal-body {
    padding: 0.5rem 0;
}

.follow-modal .modal-footer {
    border: none;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

/* Search Input in Modal */
.search-input-container {
    position: relative;
}

.search-input {
    background: var(--follow-background);
    border: 1px solid var(--follow-border);
    border-radius: var(--follow-radius-pill);
    color: var(--follow-text-primary);
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    font-size: 0.9rem;
    width: 100%;
    transition: var(--follow-transition);
}

.search-input:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--follow-primary);
    box-shadow: 0 0 0 0.2rem rgba(249, 169, 38, 0.25);
    color: var(--follow-text-primary);
    outline: none;
}

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

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--follow-text-muted);
    font-size: 0.9rem;
    pointer-events: none;
}

/* Users List Scrollbar */
.users-list {
    scrollbar-width: thin;
    scrollbar-color: rgba(249, 169, 38, 0.3) transparent;
}

.users-list::-webkit-scrollbar {
    width: 6px;
}

.users-list::-webkit-scrollbar-track {
    background: transparent;
}

.users-list::-webkit-scrollbar-thumb {
    background: rgba(249, 169, 38, 0.3);
    border-radius: 3px;
}

.users-list::-webkit-scrollbar-thumb:hover {
    background: rgba(249, 169, 38, 0.5);
}

/* =============================================================================
   Suggested Users Component
   ============================================================================= */
.suggested-users-container {
    background: linear-gradient(135deg, var(--follow-background), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--follow-border);
    border-radius: var(--follow-radius);
    backdrop-filter: blur(10px);
    transition: var(--follow-transition);
}

.see-all-link {
    font-weight: 500;
    transition: color 0.3s ease;
    text-decoration: none;
}

.see-all-link:hover {
    color: var(--follow-primary-hover) !important;
}

/* Suggestion Tabs */
.suggestion-tabs {
    background: var(--follow-background);
    padding: 0.25rem;
    border-radius: var(--follow-radius-pill);
    border: 1px solid var(--follow-border);
}

.suggestion-tabs .nav-link {
    color: var(--follow-text-secondary);
    background: transparent;
    border: none;
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--follow-transition);
    margin: 0 0.25rem;
}

.suggestion-tabs .nav-link:hover {
    color: var(--follow-primary);
    background: rgba(249, 169, 38, 0.1);
}

.suggestion-tabs .nav-link.active {
    color: var(--black, #000000) !important;
    background: var(--follow-primary);
    box-shadow: 0 2px 8px rgba(249, 169, 38, 0.3);
}

/* =============================================================================
   Loading States & Animations
   ============================================================================= */
.spinner-border.text-warning {
    color: var(--follow-primary) !important;
}

.suggested-loading,
.suggested-modal-loading {
    opacity: 1;
    transition: opacity 0.3s ease;
}

.suggested-loading.fade-out,
.suggested-modal-loading.fade-out {
    opacity: 0;
}

/* Keyframe Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(23, 207, 69, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(23, 207, 69, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(23, 207, 69, 0);
    }
}

@keyframes pulse-slow {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* Empty States */
.empty-state i,
.no-results i {
    opacity: 0.6;
    animation: pulse-slow 3s ease-in-out infinite;
}

/* =============================================================================
   Accessibility & Screen Reader Support
   ============================================================================= */
.follow-btn:focus-visible {
    outline: 2px solid var(--follow-primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================================================
   Responsive Design
   ============================================================================= */
@media (max-width: 768px) {
    .follow-modal .modal-dialog {
        margin: 1rem;
    }
    
    .follow-modal .modal-content {
        border-radius: var(--follow-radius);
    }
    
    .users-list,
    .suggested-modal-list {
        max-height: 300px !important;
    }
    
    .user-follow-card {
        margin-bottom: 0.75rem;
    }
    
    .user-stats {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.25rem;
    }
    
    .suggested-users-container {
        margin-bottom: 1rem;
    }
    
    .suggestion-tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .suggestion-tabs .nav-link {
        margin: 0.125rem 0;
        text-align: center;
    }
    
    .follow-btn {
        min-width: 80px !important;
    }
    
    .follow-btn .follow-text {
        display: none;
    }
    
    .follow-btn.btn-sm {
        padding: 0.5rem;
        min-width: 40px !important;
    }
}

@media (max-width: 576px) {
    .user-follow-card {
        padding: 1rem !important;
    }
    
    .avatar-md {
        width: 45px;
        height: 45px;
    }
    
    .avatar-lg {
        width: 55px;
        height: 55px;
    }
    
    .follow-modal .modal-header,
    .follow-modal .modal-footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* =============================================================================
   Performance Optimizations
   ============================================================================= */
.user-follow-card,
.follow-btn,
.suggested-users-container {
    will-change: transform, opacity;
    backface-visibility: hidden;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .follow-btn,
    .user-follow-card,
    .online-indicator {
        animation: none;
        transition: none;
    }
    
    .follow-btn:hover,
    .user-follow-card:hover {
        transform: none;
    }
}

/* =============================================================================
   High Contrast Mode Support
   ============================================================================= */
@media (prefers-contrast: high) {
    .follow-btn:not(.btn-outline-light) {
        background: var(--follow-primary);
        color: #000000;
        border: 2px solid #000000;
    }
    
    .follow-btn.btn-outline-light {
        border: 2px solid #ffffff;
        color: #ffffff;
    }
    
    .user-follow-card {
        border: 2px solid rgba(255, 255, 255, 0.3);
    }
}