/* ============================================
   ANIMATIONS CSS - All Features
   ============================================ */

/* Loading Animation */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeOut 0.8s ease-in-out 1.2s forwards;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 5px solid var(--accent-green);
    border-top-color: var(--accent-green-light);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    animation: slideInUp 0.8s ease-out forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }
.fade-in:nth-child(5) { animation-delay: 0.5s; }

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Enhanced Button Animations */
.btn {
    position: relative;
    overflow: hidden;
}

.btn:hover {
    animation: buttonPulse 0.6s ease-out;
}

@keyframes buttonPulse {
    0% {
        transform: scale(1) rotate(0deg);
    }
    50% {
        transform: scale(1.08) rotate(2deg);
    }
    100% {
        transform: scale(1.05) rotate(0deg);
    }
}

/* Button shine effect (optional) */
.btn-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn-shine:hover::before {
    left: 100%;
}

/* Mobile Menu Animation */
.menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 200;
}

.menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--accent-green);
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Menu Slide Animation */
.nav-menu {
    animation: menuSlideIn 0.4s ease-out;
}

@keyframes menuSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: -50px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-green);
    color: var(--primary-dark);
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.back-to-top.show {
    bottom: 30px;
    animation: popUp 0.5s ease-out;
}

.back-to-top:hover {
    background-color: var(--accent-green-light);
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(93, 157, 123, 0.3);
}

@keyframes popUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Search Container */
.search-container {
    position: relative;
    margin-bottom: 2rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 0.75rem 1rem;
    background-color: var(--secondary-dark);
    border: 2px solid var(--accent-green);
    color: var(--text-light);
    border-radius: 4px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-green-light);
    box-shadow: 0 0 10px rgba(93, 157, 123, 0.2);
    background-color: var(--primary-dark);
}

.search-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--accent-green);
    color: var(--primary-dark);
    border: 2px solid var(--accent-green);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.search-btn:hover {
    background-color: var(--accent-green-light);
    transform: scale(1.05);
}

/* Search Results Dropdown */
.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--secondary-dark);
    border: 2px solid var(--accent-green);
    border-top: none;
    border-radius: 0 0 4px 4px;
    max-height: 300px;
    overflow-y: auto;
    display: none;
    z-index: 100;
    animation: slideDown 0.3s ease-out;
}

.search-results.show {
    display: block;
}

.search-result-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-result-item:hover {
    background-color: var(--primary-dark);
    padding-left: 1.5rem;
    color: var(--accent-green-light);
}

.search-result-item:last-child {
    border-bottom: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Table of Contents */
.table-of-contents {
    background-color: var(--secondary-dark);
    border: 2px solid var(--accent-green);
    border-radius: 4px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    animation: slideInLeft 0.6s ease-out;
}

.table-of-contents h3 {
    color: var(--accent-green-light);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.table-of-contents ul {
    list-style: none;
}

.table-of-contents li {
    margin-bottom: 0.5rem;
}

.table-of-contents a {
    color: var(--accent-green);
    text-decoration: none;
    transition: all 0.3s ease;
    padding-left: 0.5rem;
}

.table-of-contents a:hover {
    color: var(--accent-green-light);
    padding-left: 1rem;
    text-decoration: underline;
}

/* Card Animation on Scroll */
.card {
    animation: slideInUp 0.6s ease-out;
}

.card:nth-child(1) { animation-delay: 0s; }
.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.3s; }

/* Hero Section Animation */
.hero {
    animation: slideInUp 0.8s ease-out;
}

.hero h1 {
    animation: slideInDown 0.8s ease-out;
}

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

/* Content Section Animation */
.content {
    animation: slideInUp 1s ease-out 0.2s forwards;
    opacity: 0;
}

/* Responsive Design for Mobile Menu */
@media (max-width: 768px) {
    .menu-btn {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background-color: var(--secondary-dark);
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        padding: 2rem 0;
        gap: 0;
        border-bottom: 2px solid var(--accent-green);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 1rem 0;
    }

    .back-to-top {
        width: 45px;
        height: 45px;
        font-size: 20px;
        right: 20px;
    }

    .back-to-top.show {
        bottom: 20px;
    }

    .search-container {
        flex-direction: column;
    }

    .search-input {
        min-width: auto;
    }

    .search-btn {
        width: 100%;
    }

    .table-of-contents {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .loader-spinner {
        width: 45px;
        height: 45px;
        border: 4px solid var(--accent-green);
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 18px;
        right: 15px;
    }

    .back-to-top.show {
        bottom: 15px;
    }

    .table-of-contents {
        padding: 0.75rem;
        margin-bottom: 1rem;
    }

    .table-of-contents h3 {
        font-size: 0.95rem;
    }

    .table-of-contents a {
        font-size: 0.9rem;
    }
}