body {
    background: #f0f2f5;
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
}

/* NAVBAR */
.navbar {
    padding: 15px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* HERO SECTION */
.hero {
    padding: 140px 20px;
    background: linear-gradient(135deg, #4b6cb7, #182848);
    color: white;
    border-radius: 25px;
    text-align: center;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.25);
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.85;
}

/* SEARCH BAR */
.search-bar {
    max-width: 650px;
    margin: 30px auto 60px auto;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 14px 20px;
    border-radius: 50px;
    border: none;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    font-size: 1rem;
    transition: all .3s ease;
}

.search-bar input:focus {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
    outline: none;
}

.search-bar button {
    position: absolute;
    right: 5px;
    top: 4px;
    border: none;
    background: #6610f2;
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    cursor: pointer;
    transition: .3s;
}

.search-bar button:hover {
    background: #4b6cb7;
}

/* ARTICLE CARDS */
.article-card {
    border-radius: 20px;
    background: white;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    transition: .5s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.article-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    border-bottom: 1px solid #eee;
}

.article-card img[data-loading] {
    filter: blur(10px);
    transition: filter .5s ease-out;
}

.article-card img.loaded {
    filter: blur(0);
}

.card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card-body h4 {
    margin-top: 10px;
    font-weight: 700;
}

.card-body p {
    color: #6c757d;
    margin-bottom: 15px;
}

/* CATEGORY BADGE */
.badge-category {
    background: #6610f2;
    color: white;
    font-size: .75rem;
    padding: .35rem .75rem;
    border-radius: .5rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    width: fit-content;
    white-space: nowrap;
}

/* FOOTER */
footer {
    margin-top: 80px;
    padding: 35px 0;
    text-align: center;
    color: #6c757d;
    background: #fff;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.05);
}

/* LOADING SKELETON */
.loading-placeholder {
    background: linear-gradient(90deg, #f0f2f5 25%, #e0e3e8 50%, #f0f2f5 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 15px;
    height: 200px;
    margin-bottom: 15px;
}

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

/* ARTICLE DETAIL PAGE */
.article-image {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    margin-bottom: 30px;
}

.article-content {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.article-content h2 {
    font-weight: 700;
    margin-bottom: 15px;
}

.article-content p {
    line-height: 1.7;
    color: #555;
    margin-bottom: 20px;
}

.article-actions {
    display: flex;
    gap: 10px;
}

.article-image-wrapper {
    position: relative;
}

.article-image-wrapper .article-actions {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.9);
    padding: 6px 8px;
    border-radius: 999px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #111;
    text-decoration: none;
    font-size: 15px;
    transition: all .25s ease;
}

.action-icon:hover {
    background: #111;
    color: #fff;
    transform: scale(1.08);
}

.action-icon.edit:hover {
    background: #f59e0b;
}

.action-icon.delete:hover {
    background: #dc3545;
}

.article-actions form {
    margin: 0;
}

.article-actions button {
    background: none;
    border: none;
    padding: 0;
}

.author {
    display: flex;
    align-items: center;
    gap: 10px;
    font-style: italic;
    color: #666;
    margin-bottom: 20px;
}

.btn-back {
    background: #6610f2;
    color: white !important;
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none !important;
    transition: .3s;
}

.btn-back:hover {
    background: #4b4bb7;
}

/* FILTER BAR */
.filter-bar {
    margin: 30px 0;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.category-item {
    display: inline-flex;
    align-items: center;
}

.filter-bar {
    margin: 30px 0;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.category-item {
    display: inline-flex;
    align-items: center;
}

/* filter button */
.filter-btn {
    padding: 10px 18px;
    border-radius: 999px;
    background: #e0e3e8;
    color: #111;
    text-decoration: none;
    transition: background 0.25s ease, color 0.25s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: #6610f2;
    color: #fff;
}

.delete-category-form {
    display: inline-flex;
    align-items: center;

    max-width: 0;
    opacity: 0;
    overflow: hidden;

    transition: max-width 0.25s ease, opacity 0.2s ease;
}

.trash-btn {
    background: transparent;
    border: none;
    cursor: pointer;

    color: #dc3545;
    padding: 0;
    margin-left: 6px;

    transform: translateX(-6px);
    transition: transform 0.25s ease, color 0.2s ease;
}

.category-item:hover .delete-category-form {
    max-width: 30px;
    opacity: 1;
}

.category-item:hover .trash-btn {
    transform: translateX(0);
}

.trash-btn:hover {
    color: #b02a37;
    transform: scale(1.1);
}

/* PAGINATION */
.pagination {
    justify-content: center;
    margin-top: 20px;
}

.pagination .page-item {
    margin: 0 5px;
}

.pagination .page-link {
    border-radius: 50px;
    padding: 8px 16px;
    border: 1px solid #e0e3e8;
    transition: .3s;
}

.pagination .page-link:hover,
.pagination .active .page-link {
    background: #6610f2;
    border-color: #6610f2;
    color: white;
}

/* FORMS */
.container-form,
.login-container,
.register-container {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    margin: 50px auto 80px auto;
}

.container-form {
    max-width: 800px;
}

.login-container {
    max-width: 400px;
    margin-top: 100px;
}

.register-container {
    max-width: 450px;
    margin-top: 80px;
}

.container-form h2,
.login-container h2,
.register-container h2 {
    font-weight: 800;
    margin-bottom: 25px;
    text-align: center;
}

.form-control,
.form-select {
    border-radius: 12px;
}

.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 10px rgba(102, 16, 242, 0.5);
    border-color: #6610f2;
}

.btn-submit,
.btn-login,
.btn-register {
    background: #6610f2;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    transition: .3s;
    width: 100%;
}

.btn-submit:hover,
.btn-login:hover,
.btn-register:hover {
    background: #4b6cb7;
}

.btn-danger.btn-submit {
    background: #dc3545;
}

.btn-danger.btn-submit:hover {
    background: #b02a37;
}

.text-center a {
    color: #6610f2;
    text-decoration: none;
}

.text-center a:hover {
    text-decoration: underline;
}

@keyframes slideInBounce {
    0% {
        transform: translateX(120%);
        opacity: 0;
    }
    60% {
        transform: translateX(-10%);
        opacity: 1;
    }
    80% {
        transform: translateX(5%);
    }
    100% {
        transform: translateX(0);
    }
}

.toast-animate {
    animation: slideInBounce 0.6s ease-out;
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 0;
}