/* ============================================
   MILESTONE TIMELINE COMPONENT
   ============================================ */

.milestone-timeline-container {
    background: linear-gradient(135deg, #f8fafb 0%, #ffffff 100%);
    border: 2px solid #e5e7eb;
    border-radius: 16px;
    padding: 24px 20px;
    margin-bottom: 32px;
    box-shadow: 0 4px 16px rgba(15, 23, 36, 0.08);
    position: relative;
    overflow: hidden;
}

.milestone-timeline-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #1fb6ff 0%, #0ea5e9 50%, #1fb6ff 100%);
    background-size: 200% 100%;
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.milestone-timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.milestone-timeline-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
}

.milestone-timeline-title i {
    color: var(--accent);
    font-size: 1.6rem;
}

.milestone-count-badge {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(31, 182, 255, 0.3);
}

.milestone-add-btn {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(31, 182, 255, 0.25);
    position: relative;
    overflow: hidden;
}

.milestone-add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(31, 182, 255, 0.35);
}

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

.milestone-add-btn.pulse {
    animation: buttonPulse 2s infinite;
}

.milestone-add-btn.pulse::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    transform: translate(-50%, -50%) scale(0);
    animation: ripple 2s infinite;
}

@keyframes buttonPulse {
    0%, 100% { box-shadow: 0 4px 12px rgba(31, 182, 255, 0.25); }
    50% { box-shadow: 0 6px 20px rgba(31, 182, 255, 0.45); }
}

@keyframes ripple {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(2); opacity: 0; }
}

.milestone-timeline {
    position: relative;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 10px 0;
    margin: 0px;
    scroll-behavior: smooth;
}

.milestone-timeline::-webkit-scrollbar {
    height: 8px;
}

.milestone-timeline::-webkit-scrollbar-track {
    background: #f0f4f8;
    border-radius: 10px;
}

.milestone-timeline::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-radius: 10px;
    transition: background 0.3s ease;
}

.milestone-timeline::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--accent-dark) 0%, #0284c7 100%);
}

.milestone-track {
    display: flex;
    gap: 24px;
    padding: 10px;
    min-width: min-content;
    position: relative;
}

.milestone-track::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #e5e7eb 0%, var(--accent) 20%, var(--accent) 80%, #e5e7eb 100%);
    z-index: 0;
}

.milestone-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 180px;
    max-width: 180px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1;
}

.milestone-item:hover {
    transform: translateY(-8px);
}

.milestone-item:hover .milestone-icon-wrapper {
    transform: scale(1.15);
    box-shadow: 0 12px 32px rgba(31, 182, 255, 0.35);
}

.milestone-icon-wrapper {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(31, 182, 255, 0.25);
    border: 4px solid white;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.milestone-icon {
    font-size: 2rem;
    color: white;
}

.milestone-item[data-type="Birthday"] .milestone-icon-wrapper {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.milestone-item[data-type="Birthday"]:hover .milestone-icon-wrapper {
    box-shadow: 0 12px 32px rgba(236, 72, 153, 0.35);
}

.milestone-item[data-type="Adoption"] .milestone-icon-wrapper {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.milestone-item[data-type="Adoption"]:hover .milestone-icon-wrapper {
    box-shadow: 0 12px 32px rgba(16, 185, 129, 0.35);
}

.milestone-item[data-type="Achievement"] .milestone-icon-wrapper {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.milestone-item[data-type="Achievement"]:hover .milestone-icon-wrapper {
    box-shadow: 0 12px 32px rgba(245, 158, 11, 0.35);
}

.milestone-item[data-type="Medical"] .milestone-icon-wrapper {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.milestone-item[data-type="Medical"]:hover .milestone-icon-wrapper {
    box-shadow: 0 12px 32px rgba(239, 68, 68, 0.35);
}

.milestone-item[data-type="Training"] .milestone-icon-wrapper {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.milestone-item[data-type="Training"]:hover .milestone-icon-wrapper {
    box-shadow: 0 12px 32px rgba(139, 92, 246, 0.35);
}

.milestone-item[data-type="Custom"] .milestone-icon-wrapper {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.milestone-item[data-type="Custom"]:hover .milestone-icon-wrapper {
    box-shadow: 0 12px 32px rgba(6, 182, 212, 0.35);
}

.milestone-content {
    text-align: center;
    margin-top: 16px;
    padding: 0 8px;
}

.milestone-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.milestone-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0 0 4px 0;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.milestone-type-badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    margin-top: 4px;
    background: rgba(31, 182, 255, 0.1);
    color: var(--accent);
}

.milestone-empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.milestone-empty-state i {
    font-size: 4rem;
    color: #d1d5db;
    margin-bottom: 16px;
    display: block;
}

.milestone-empty-state h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.milestone-empty-state p {
    font-size: 0.95rem;
    margin-bottom: 24px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.milestone-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: 2px solid #e5e7eb;
    color: var(--primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.milestone-nav-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.milestone-nav-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.milestone-nav-btn-left {
    left: 20px;
}

.milestone-nav-btn-right {
    right: 20px;
}

.milestone-nav-btn i {
    font-size: 1.2rem;
}

.milestone-detail-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
    overflow-y: auto;
}

.milestone-detail-modal {
    background: white;
    border-radius: 16px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

.milestone-detail-header {
    padding: 24px;
    border-bottom: 2px solid #e5e7eb;
    position: relative;
}

.milestone-detail-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.milestone-detail-close:hover {
    background: #f3f4f6;
    color: var(--primary);
}

.milestone-detail-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 8px 24px rgba(31, 182, 255, 0.25);
}

.milestone-detail-icon i {
    font-size: 2.5rem;
    color: white;
}

.milestone-detail-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-align: center;
    margin: 0 0 8px 0;
}

.milestone-detail-date {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 600;
}

.milestone-detail-body {
    padding: 24px;
}

.milestone-detail-photo {
    width: 100%;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.milestone-detail-description {
    font-size: 1rem;
    color: var(--primary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.milestone-detail-actions {
    display: flex;
    gap: 12px;
    padding: 20px 24px;
    border-top: 2px solid #e5e7eb;
}

.milestone-action-btn {
    flex: 1;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
}

.milestone-like-btn {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.milestone-like-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.3);
}

.milestone-like-btn.liked {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.milestone-comment-btn {
    background: white;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.milestone-comment-btn:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .milestone-timeline-container {
        padding: 20px 16px;
        border-radius: 12px;
    }

    .milestone-timeline-title {
        font-size: 1.2rem;
    }

    .milestone-timeline-title i {
        font-size: 1.4rem;
    }

    .milestone-add-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .milestone-item {
        min-width: 150px;
        max-width: 150px;
    }

    .milestone-icon-wrapper {
        width: 70px;
        height: 70px;
    }

    .milestone-icon {
        font-size: 1.75rem;
    }

    .milestone-track::before {
        top: 80px;
    }

    .milestone-nav-btn {
        width: 36px;
        height: 36px;
    }

    .milestone-detail-modal {
        max-height: 85vh;
    }

    .milestone-detail-actions {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .milestone-timeline-container {
        padding: 16px 12px;
        margin-bottom: 24px;
    }

    .milestone-timeline-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .milestone-add-btn {
        width: 100%;
        justify-content: center;
    }

    .milestone-item {
        min-width: 130px;
        max-width: 130px;
    }

    .milestone-icon-wrapper {
        width: 60px;
        height: 60px;
        border: 3px solid white;
    }

    .milestone-icon {
        font-size: 1.5rem;
    }

    .milestone-track::before {
        top: 70px;
    }

    .milestone-content {
        margin-top: 12px;
    }

    .milestone-title {
        font-size: 0.85rem;
    }

    .milestone-date {
        font-size: 0.7rem;
    }

    .milestone-nav-btn {
        width: 32px;
        height: 32px;
    }

    .milestone-nav-btn-left {
        left: -16px;
    }

    .milestone-nav-btn-right {
        right: -16px;
    }

    .milestone-empty-state {
        padding: 40px 16px;
    }

    .milestone-empty-state i {
        font-size: 3rem;
    }

    .milestone-empty-state h4 {
        font-size: 1rem;
    }

    .milestone-empty-state p {
        font-size: 0.85rem;
    }
}