:root {
    --primary: #FF5E5B;
    --secondary: #00CECB;
    --dark: #2D3047;
    --light: #FFFFEA;
    --accent: #FFED66;
    --success: #48c457;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--light);
    font-family: 'Courier New', monospace;
    margin: 0;
    padding: 0;
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    width: 100%;
    position: relative;
}

.container-footer {
    max-width: 1000px;
    margin: 0.3rem auto;
    padding: 0 1rem;
}

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: -1px;
}

/* Search Form Styles */
.search-container {
    background-color: white;
    border: 3px solid var(--dark);
    box-shadow: 6px 6px 0 var(--dark); /* Diperkecil dari 8px */
    padding: 1.5rem;
    margin-bottom: 2rem;
    width: 100%;
    overflow: hidden; /* Baru ditambahkan */
}

.search-form-row {
    display: flex;
    gap: 1rem;
    align-items: stretch;
    flex-wrap: wrap; /* Baru ditambahkan */
}

.search-input {
    flex: 3;
    min-width: 0;
}

.search-input input {
    width: 100%;
    height: 100%;
    padding: 0.8rem;
    border: 3px solid var(--dark);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    background-color: white;
    box-shadow: 4px 4px 0 var(--dark);
    box-sizing: border-box;
    min-width: 0; /* Pastikan ini ada */
    flex: 1 1 auto; /* Diubah dari flex: 3/flex: 1 */
}

.search-select {
    min-width: 120px;
    flex: 1 1 auto; /* Diubah dari flex: 3/flex: 1 */
}

.search-select select {
    width: 100%;
    height: 100%;
    padding: 0.8rem;
    border: 3px solid var(--dark);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    background-color: white;
    box-shadow: 4px 4px 0 var(--dark);
    box-sizing: border-box;
}

.search-submit {
    min-width: 100px;
}

.search-submit button {
    width: 100%;
    height: 100%;
    padding: 0.8rem;
    background-color: var(--primary);
    color: white;
    border: 3px solid var(--dark);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 6px 6px 0 var(--dark);
    text-transform: uppercase;
    box-sizing: border-box;
}

.search-submit button:hover {
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0 var(--dark);
}

/* Result Header Styles */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.result-count {
    font-weight: bold;
    background-color: var(--accent);
    padding: 0.5rem 1rem;
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--dark);
}

/* Filter Badge Styles */
.filter-section {
    margin-bottom: 1.5rem;
}

.filter-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: bold;
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--dark);
}

.filter-badge a {
    margin-left: 0.5rem;
    color: inherit;
    text-decoration: none;
}

/* Paper Card Styles */
.paper-card {
    background-color: white;
    border: 3px solid var(--dark);
    box-shadow: 6px 6px 0 var(--dark); /* Diperkecil dari 8px */
    margin-bottom: 2rem;
    transition: all 0.2s;
    overflow: hidden;
}

.paper-card:hover {
    /* transform: translate(2px, 2px); */
    box-shadow: 6px 6px 0 var(--dark);
}

.card-body {
    padding: 1.5rem;
    box-sizing: border-box;
}

.paper-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* OA Badge Styles */
.oa-badge {
    background-color: var(--success);
    color: var(--dark);
    padding: 0.2rem 0.6rem;
    border: 2px solid var(--dark);
    font-size: 0.75rem;
    font-weight: bold;
    border-radius: 2px;
    box-shadow: 3px 3px 0 var(--dark);
    /* margin-left: 0.5rem; */
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1;
}

.oa-badge i {
    font-size: 0.7em;
}

/* Paper Meta Styles */
.paper-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.paper-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: bolder;
}

/* Journal Info Styles */
.journal-info {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.journal-badge {
    padding: 0.3rem 0.8rem;
    border: 2px solid var(--dark);
    font-weight: bold;
    font-size: 0.6rem;
    background-color: white;
    box-shadow: 0.5px 0.5px 0 var(--dark);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.journal-name {
    background-color: var(--secondary);
}

/* Abstract Styles */
.abstract-container {
    margin-bottom: 1.5rem;
    position: relative;
}

.abstract-title {
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--primary);
    text-transform: uppercase;
}

.abstract-content {
    line-height: 1.6;
    padding: 0.5rem 0;
}

/* Button Styles */
.btn-read-more, .btn-read-less {
    background: none;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: bold;
    padding: 0.5rem 1rem;
    cursor: pointer;
    box-shadow: 3px 3px 0 var(--dark);
    transition: all 0.2s;
    font-family: 'Courier New', monospace;
}

.btn-read-more:hover, .btn-read-less:hover {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--dark);
}

/* Action Buttons Styles */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.5rem;
    margin-bottom: -0.5rem;
}

.action-btn {
    padding: 0.6rem 1.2rem;
    font-weight: bold;
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--dark);
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-sizing: border-box;
    margin-bottom: 0.5rem;
}

.action-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

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

.btn-outline {
    background-color: white;
    color: var(--dark);
}

/* Back to Top Button Styles */
.back-to-top-container {
    text-align: center;
    margin: 2rem 0;
    padding: 0 1rem;
}

.back-to-top-btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary);
    color: var(--dark);
    font-weight: bold;
    text-transform: uppercase;
    border: 3px solid var(--dark);
    box-shadow: 6px 6px 0 var(--dark);
    text-decoration: none;
    font-family: 'Courier New', monospace;
    transition: all 0.2s ease;
    cursor: pointer;
}

.back-to-top-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0 var(--dark);
    background-color: var(--accent);
}

.back-to-top-btn:active {
    transform: translate(6px, 6px);
    box-shadow: 0 0 0 var(--dark);
}

.back-to-top-btn i {
    margin-right: 0.5rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem; /* Padding lebih kecil di mobile */
    }

    .search-container,
    .paper-card {
        box-shadow: 4px 4px 0 var(--dark); /* Lebih kecil di mobile */
    }
    
    .search-form-row {
        flex-direction: column;
        gap: 1rem; /* Gap lebih kecil */
    }
    
    .search-input,
    .search-select,
    .search-submit {
        min-width: 0; /* Pastikan ini ada */
        flex: 1 1 auto; /* Diubah dari flex: 3/flex: 1 */
    }
    
    .paper-title {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .action-btn {
        width: 100%;
        justify-content: center;
        margin-bottom: 0.5rem;
    }
}

/* Navbar Styles */
.minimal-header {
    overflow-x: hidden;
    background-color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%; /* Diubah dari 100vw */
    box-sizing: border-box; /* Ditambahkan */
}

.container-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%; /* Ditambahkan */
    box-sizing: border-box; /* Ditambahkan */
}

/* Logo Styles */
.site-brand .site-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e04a47;
    text-decoration: none;
}

/* Main Navigation - Desktop */
.main-nav {
    display: flex;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links li:not(.donate-li) a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s;
}

.nav-links li:not(.donate-li) a:hover {
    color: #e04a47;
}

.nav-links li:not(.donate-li) a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #e04a47;
    transition: width 0.3s;
}

.nav-links li:not(.donate-li) a:hover::after {
    width: 100%;
}

/* Donate Button */
.donate-li {
    margin-left: 0.5rem;
}

.donate-btn {
    background-color: #e04a47;
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.3s;
}

.donate-btn:hover {
    background-color: rgb(111, 78, 55);
}

.donate-btn i.fa-coffee {
    animation: bounce 1s infinite alternate;
}
@keyframes bounce {
    to { transform: translateY(-3px); }
}

/* Mobile Menu Toggle Button */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: all 0.3s ease;
}

.mobile-only {
    display: none;
}

/* Responsive Styles - Mobile */
@media (max-width: 768px) {
    .container-nav {
        padding: 0 15px;
    }

    .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        transform: translateX(-100%);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.2s ease;
        height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .main-nav.active {
        transform: translateX(0);
        opacity: 1;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0;
        width: 85vw; /* Full width */
        left: 0;
        padding: 1rem 15px; /* Consistent padding */
        box-sizing: border-box; /* Include padding in width */
    }
    
    .nav-links li {
        padding: 12px 0;
        border-bottom: 1px solid #f0f0f0;
        width: 100%; /* Full width items */
        box-sizing: border-box;
    }
    
    .nav-links li a {
        white-space: normal;
        word-break: break-word;
        display: inline-block;
        max-width: 100%;
    }
    
    .donate-li {
        margin: 1rem 0 0 0;
        width: 100%;
        border-bottom: none;
    }

    .donate-btn {
        width: 100%;
        max-width: 100%;
        display: block;
        text-align: center;
        padding: 12px 10px !important;
        margin: 10px 0 0 0;
        white-space: normal; /* Allow text wrapping */
    }
    
    .mobile-only {
        display: block;
    }
    
    /* Hamburger Animation */
    .hamburger.active .hamburger-line:nth-child(1) {
        transform: translateY(10px) rotate(45deg);
    }
    
    .hamburger.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .hamburger-line:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

/* Footer Styles */
.site-footer {
    background-color: var(--dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col {
    margin-left: 2rem;
}

@media (max-width: 768px) {
    .footer-col {
        margin-left: 0.5rem;
    }
}

.footer-col h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.footer-col a {
    color: #ddd;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
    font-size: 1.2rem;
}

.copyright-bar {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
}

.quick-links {
    list-style: none;
    padding: 0;
}

.quick-links li {
    margin-bottom: 12px;
}

.quick-links a {
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    padding: 6px 0;
}

.quick-links a:hover {
    color: var(--accent);
    transform: translateX(5px);
}

.quick-links i {
    width: 20px;
    text-align: center;
    font-size: 1.1em;
}

.fa-heart {
  animation: pulse 1.5s infinite;
  display: inline-block;
}
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

/* Loading Animation */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.loading-content {
    text-align: center;
    max-width: 300px;
    padding: 2rem;
    background: white;
    border: 3px solid var(--dark);
    box-shadow: 8px 8px 0 var(--dark);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--light);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

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

.loading-details {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--dark);
    font-weight: bold;
}