/* ============================================
   RETENTION SYSTEM - CSS
   ============================================ */

/* 1. READING PROGRESS BAR */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10001;
    background: transparent;
}

.reading-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light), #8BC34A);
    transition: width 0.1s linear;
    border-radius: 0 2px 2px 0;
}

/* 2. AUTO-DOWNLOAD COUNTDOWN (Download page) */
.auto-download-box {
    text-align: center;
    padding: var(--space-6) var(--space-4);
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
    border-radius: var(--radius-lg);
    margin-top: var(--space-4);
}

.countdown-ring {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
}

.countdown-number {
    position: absolute;
    font-size: var(--text-3xl);
    font-weight: 900;
    color: var(--color-primary-dark);
}

#countdown-circle {
    transition: stroke-dashoffset 0.8s ease;
}

.countdown-text {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.countdown-progress {
    height: 6px;
    background: rgba(0,0,0,0.08);
    border-radius: var(--radius-full);
    overflow: hidden;
    max-width: 300px;
    margin: 0 auto;
}

.countdown-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-full);
    transition: width 0.8s ease;
}

.download-complete-box {
    text-align: center;
    padding: var(--space-6) var(--space-4);
    background: var(--color-primary-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    margin-top: var(--space-4);
}

.complete-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    font-size: var(--text-2xl);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-3);
    animation: scaleIn 0.4s ease;
}

@keyframes scaleIn {
    from { transform: scale(0); }
    to { transform: scale(1); }
}

.complete-text {
    font-size: var(--text-lg);
    color: var(--color-primary-dark);
    margin-bottom: var(--space-2);
}

.complete-sub {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* 2b. DOWNLOAD COUNTDOWN (other buttons) */
.download-btn.counting {
    background: linear-gradient(135deg, #FF9800, #F57C00) !important;
    pointer-events: none;
    animation: pulseBtn 1s ease infinite;
}

@keyframes pulseBtn {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* 3. EXIT INTENT POPUP */
.exit-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100000;
}

.exit-popup.is-visible {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

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

.exit-popup-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.exit-popup-content {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    max-width: 440px;
    width: 90%;
    text-align: center;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.4s ease;
}

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

.exit-popup-close {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-alt);
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.exit-popup-close:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.exit-popup-icon {
    margin-bottom: var(--space-4);
}

.exit-popup-content h3 {
    font-size: var(--text-xl);
    font-weight: 800;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.exit-popup-content p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-5);
    line-height: 1.6;
}

.exit-popup-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--space-4) var(--space-6) !important;
    font-size: var(--text-base) !important;
    border-radius: var(--radius-lg) !important;
    margin-bottom: var(--space-4);
}

.exit-popup-links {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    font-size: var(--text-xs);
}

.exit-popup-links a {
    color: var(--color-text-muted);
}

.exit-popup-links a:hover {
    color: var(--color-primary);
}

.exit-popup-links span {
    color: var(--color-border);
}

/* 4. USER RATING WIDGET */
.user-rating-widget {
    margin-top: var(--space-6);
    padding-top: var(--space-5);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.rating-prompt p:first-child {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-3);
}

.rating-stars-interactive {
    display: flex;
    justify-content: center;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
}

.rating-stars-interactive button {
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.3);
    background: none;
    border: none;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0 2px;
    line-height: 1;
}

.rating-stars-interactive button:hover,
.rating-stars-interactive button.active {
    color: #FFC107;
    transform: scale(1.2);
}

.rating-count-text {
    font-size: var(--text-xs) !important;
    color: rgba(255, 255, 255, 0.5) !important;
    margin-bottom: 0 !important;
}

/* 5. SCROLL NUDGE */
.scroll-nudge {
    text-align: center;
    padding: var(--space-4) var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-primary);
    font-weight: 500;
    letter-spacing: 0.3px;
}

.nudge-arrow {
    display: inline-block;
    animation: bounceArrow 2s ease infinite;
}

@keyframes bounceArrow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

/* 6. NEWSLETTER BAR */
.newsletter-bar {
    position: fixed;
    bottom: -120px;
    left: 0;
    right: 0;
    z-index: 800;
    background: var(--color-surface);
    border-top: 2px solid var(--color-primary);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.12);
    transition: bottom 0.4s ease;
}

.newsletter-bar.is-visible {
    bottom: 0;
}

@media (max-width: 767px) {
    .newsletter-bar.is-visible {
        bottom: 60px; /* Above sticky download bar */
    }
}

.newsletter-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-3);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-4);
}

.newsletter-text strong {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text);
    margin-bottom: 2px;
}

.newsletter-text span {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.newsletter-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

.newsletter-btn {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.newsletter-accept {
    background: var(--color-primary);
    color: white;
}

.newsletter-accept:hover {
    background: var(--color-primary-dark);
}

.newsletter-dismiss {
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
}

.newsletter-dismiss:hover {
    background: var(--color-border);
}

.newsletter-success {
    font-size: var(--text-sm);
    color: var(--color-primary);
    font-weight: 600;
}

/* 7. READING TIME BADGE */
.reading-time-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-3);
}

/* 8. RECENTLY VIEWED */
.recently-viewed {
    background: var(--color-surface-alt);
    padding: var(--space-6) var(--space-4);
    text-align: center;
}

.recently-viewed h4 {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: var(--space-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.recent-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.recent-link {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--color-text-secondary) !important;
    transition: all 0.2s;
}

.recent-link:hover {
    border-color: var(--color-primary-light);
    color: var(--color-primary) !important;
    box-shadow: var(--shadow-sm);
}

/* 9. DARK MODE OVERRIDES */
@media (prefers-color-scheme: dark) {
    .exit-popup-overlay {
        background: rgba(0, 0, 0, 0.8);
    }

    .newsletter-bar {
        background: var(--color-surface);
        border-top-color: var(--color-primary);
    }

    .user-rating-widget {
        border-top-color: rgba(255, 255, 255, 0.08);
    }
}

/* 10. PRINT - HIDE ALL RETENTION ELEMENTS */
@media print {
    .reading-progress-bar,
    .exit-popup,
    .newsletter-bar,
    .scroll-nudge,
    .recently-viewed,
    .user-rating-widget,
    .reading-time-badge {
        display: none !important;
    }
}