/* ===================================
   Navigation Intelligence - Styles
   Smart suggestions, progress bar,
   floating navigation, related bubbles
   =================================== */

/* ==========================================
   READING PROGRESS BAR
   ========================================== */
#reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(0, 0, 0, 0.1);
    z-index: 9999;
    pointer-events: none;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #00ffaa);
    width: 0%;
    transition: width 0.2s ease;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* ==========================================
   SMART SUGGESTIONS BOX
   ========================================== */
.smart-suggestions-box {
    position: fixed;
    bottom: -300px;
    right: 2rem;
    width: 400px;
    max-width: calc(100vw - 4rem);
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 
                0 0 20px var(--accent-glow);
    z-index: 9998;
    transition: bottom 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.smart-suggestions-box.show {
    bottom: 2rem;
}

.suggestions-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(0, 217, 255, 0.2);
    font-weight: 600;
    color: var(--text-primary);
}

.suggestions-icon {
    font-size: 1.25rem;
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% { 
        filter: drop-shadow(0 0 2px var(--accent-color));
    }
    50% { 
        filter: drop-shadow(0 0 8px var(--accent-color));
    }
}

.close-suggestions {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-suggestions:hover {
    color: var(--accent-color);
    transform: rotate(90deg);
}

.suggestions-content {
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.suggestion-card {
    background: rgba(10, 10, 15, 0.6);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 10px;
    padding: 1rem;
    text-decoration: none;
    transition: var(--transition);
    display: block;
    position: relative;
    overflow: hidden;
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 217, 255, 0.1), transparent);
    transition: left 0.5s;
}

.suggestion-card:hover::before {
    left: 100%;
}

.suggestion-card:hover {
    border-color: var(--accent-color);
    transform: translateX(5px);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.suggestion-card h4 {
    color: var(--accent-color);
    font-size: 1rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.suggestion-reason {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.4;
    margin: 0;
}

.suggestion-arrow {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-color);
    font-size: 1.25rem;
    opacity: 0;
    transition: var(--transition);
}

.suggestion-card:hover .suggestion-arrow {
    opacity: 1;
    transform: translateY(-50%) translateX(3px);
}

/* ==========================================
   FLOATING QUICK NAVIGATION
   ========================================== */
#floating-quick-nav {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 9997;
}

.float-nav-toggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.float-nav-toggle:hover {
    background: var(--accent-color);
    color: var(--primary-bg);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.float-nav-menu {
    position: absolute;
    right: 60px;
    top: 0;
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    border-radius: 10px;
    min-width: 250px;
    max-height: 400px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateX(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

#floating-quick-nav.open .float-nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.float-nav-header {
    padding: 1rem;
    border-bottom: 1px solid rgba(0, 217, 255, 0.2);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.float-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.float-nav-item:hover {
    background: rgba(0, 217, 255, 0.1);
    color: var(--text-primary);
    border-left-color: var(--accent-color);
}

.float-nav-item.active {
    background: rgba(0, 217, 255, 0.15);
    color: var(--accent-color);
    border-left-color: var(--accent-color);
}

.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 2px solid var(--text-secondary);
    flex-shrink: 0;
    transition: var(--transition);
}

.float-nav-item.active .nav-dot {
    background: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 8px var(--accent-glow);
}

.nav-text {
    font-size: 0.875rem;
    line-height: 1.3;
}

/* Scrollbar styling */
.float-nav-menu::-webkit-scrollbar {
    width: 6px;
}

.float-nav-menu::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

.float-nav-menu::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 3px;
}

/* ==========================================
   RELATED CONTENT BUBBLES
   ========================================== */
.related-content-bubble {
    margin-top: 3rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.05), rgba(0, 255, 170, 0.05));
    border: 1px solid var(--accent-color);
    border-radius: 15px;
    animation: fadeInUp 0.6s ease-out;
}

.bubble-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.bubble-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.bubble-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.bubble-link {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border-left: 3px solid var(--accent-color);
    transition: var(--transition);
    font-weight: 500;
}

.bubble-link::before {
    content: '→';
    margin-right: 0.75rem;
    color: var(--accent-color);
    font-weight: bold;
    transition: var(--transition);
}

.bubble-link:hover {
    background: rgba(0, 217, 255, 0.1);
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.2);
}

.bubble-link:hover::before {
    transform: translateX(3px);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .smart-suggestions-box {
        width: calc(100vw - 2rem);
        right: 1rem;
    }

    .smart-suggestions-box.show {
        bottom: 1rem;
    }

    #floating-quick-nav {
        right: 1rem;
    }

    .float-nav-menu {
        right: 60px;
        min-width: 200px;
    }

    .related-content-bubble {
        margin-top: 2rem;
        padding: 1rem;
    }

    .bubble-link {
        font-size: 0.875rem;
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 480px) {
    #floating-quick-nav {
        display: none; /* Too cramped on very small screens */
    }

    .smart-suggestions-box {
        width: calc(100vw - 1rem);
        right: 0.5rem;
    }
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   THEME BADGES (for showing user interests)
   ========================================== */
.interest-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--accent-color);
    margin: 0.25rem;
    font-weight: 500;
}

/* ==========================================
   EXPLORATION ENCOURAGEMENT
   ========================================== */
.exploration-hint {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-size: 0.875rem;
    color: var(--text-primary);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 9996;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.exploration-hint.show {
    opacity: 1;
    visibility: visible;
}

.exploration-hint::before {
    content: '✨';
    margin-right: 0.5rem;
}