/* ======================== NHK Easy-Inspired Design Tokens ======================== */
:root {
    --nhk-teal: #1CB7AD;
    --nhk-teal-hover: #159b93;
    --nhk-teal-light: #e9faf9;
    --nhk-text: #1f1f20;
    --nhk-text-secondary: #414143;
    --nhk-bg: #ffffff;
    --nhk-bg-subtle: #f9f9f9;
    --nhk-bg-tertiary: #f2f2f3;
    --nhk-border: #e2e2e3;
    --nhk-border-light: #d2d2d3;
    --nhk-border-dark: #909091;
    --nhk-radius-sm: 4px;
    --nhk-radius: 8px;
    --nhk-max-width: 1040px;
    --nhk-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --nhk-shadow: 0 2px 8px rgba(0, 0, 0, .08);
    --nhk-shadow-hover: 0 4px 16px rgba(0, 0, 0, .1);
}

/* ======================== Base Reset & Typography ======================== */
body {
    font-family: var(--nhk-font);
    font-size: 1.0625rem;
    color: var(--nhk-text);
    background: var(--nhk-bg);
    line-height: 1.7;
    letter-spacing: .01em;
}

a {
    color: var(--nhk-teal);
    text-decoration: none;
}

a:hover {
    color: var(--nhk-teal-hover);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--nhk-text);
    font-weight: 700;
    line-height: 1.3;
}

hr {
    border-top: 1px solid var(--nhk-border);
    opacity: 1;
}

/* ======================== Navbar - NHK White Style ======================== */
.navbar {
    background: var(--nhk-bg) !important;
    border-bottom: 1px solid var(--nhk-border);
    padding: .75rem 0;
}

.navbar .container {
    max-width: var(--nhk-max-width);
}

.navbar-brand {
    color: var(--nhk-text) !important;
    font-weight: 700;
    font-size: 1.375rem;
    letter-spacing: .02em;
}

.navbar .nav-link {
    color: var(--nhk-text-secondary) !important;
    font-size: .9375rem;
    font-weight: 500;
    padding: .5rem 1rem !important;
    transition: color .2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: var(--nhk-teal) !important;
}

.navbar-toggler {
    border-color: var(--nhk-border);
    padding: .25rem .5rem;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(31,31,32,0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Login button in navbar */
.navbar .btn-login {
    background: var(--nhk-teal);
    color: #fff !important;
    border-radius: var(--nhk-radius);
    padding: .45rem 1.375rem !important;
    font-weight: 600;
    font-size: .875rem;
    transition: background .2s ease;
}

.navbar .btn-login:hover {
    background: var(--nhk-teal-hover);
    color: #fff !important;
}

/* Category dropdown */
.dropdown-menu {
    border: 1px solid var(--nhk-border);
    border-radius: var(--nhk-radius);
    box-shadow: var(--nhk-shadow);
    padding: .5rem 0;
}

.dropdown-item {
    font-size: .9375rem;
    padding: .5rem 1.25rem;
    color: var(--nhk-text-secondary);
}

.dropdown-item:hover {
    background: var(--nhk-bg-subtle);
    color: var(--nhk-teal);
}

/* ======================== Hero / Featured Article ======================== */
.hero-card {
    border: none;
    border-radius: 0;
    overflow: hidden;
    background: var(--nhk-bg);
}

.hero-card .card-img-top {
    border-radius: 0;
    object-fit: cover;
    height: 420px;
    width: 100%;
}

.hero-card .card-body {
    padding: 1.5rem 0 0 0;
}

.hero-card .card-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: .75rem;
    line-height: 1.3;
}

.hero-card .card-title a {
    color: var(--nhk-text);
}

.hero-card .card-title a:hover {
    color: var(--nhk-teal);
}

.hero-card .card-text {
    font-size: 1.0625rem;
    color: var(--nhk-text-secondary);
    line-height: 1.75;
}

/* ======================== Article Cards ======================== */
.article-card {
    border: 1px solid var(--nhk-border);
    border-radius: 0;
    box-shadow: none;
    transition: box-shadow .25s ease, transform .2s ease;
    height: 100%;
    overflow: hidden;
    background: var(--nhk-bg);
}

.article-card:hover {
    box-shadow: var(--nhk-shadow-hover);
    transform: translateY(-2px);
}

.article-card .card-img-top {
    border-radius: 0;
    object-fit: cover;
    height: 200px;
    width: 100%;
}

.article-card .card-body {
    padding: 1rem 1.25rem;
}

.article-card .card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: .5rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card .card-title a {
    color: var(--nhk-text);
}

.article-card .card-title a:hover {
    color: var(--nhk-teal);
}

.article-card .card-text {
    font-size: .9375rem;
    color: var(--nhk-text-secondary);
    line-height: 1.65;
}

.article-card .card-meta {
    font-size: .8125rem;
    color: var(--nhk-border-dark);
    margin-bottom: .5rem;
}

/* ======================== Category Badges ======================== */
.badge-category {
    display: inline-block;
    background: var(--nhk-teal-light);
    color: var(--nhk-teal);
    padding: .25rem .875rem;
    border-radius: 100px;
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .03em;
    text-transform: uppercase;
    margin-bottom: .5rem;
}

/* ======================== Category Section Headers ======================== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: .75rem;
    margin-bottom: 1.25rem;
    border-bottom: 2px solid var(--nhk-text);
}

.section-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--nhk-text);
}

.section-header .btn-link {
    font-size: .9375rem;
    color: var(--nhk-teal);
    font-weight: 600;
    text-decoration: none;
    padding: 0;
}

.section-header .btn-link:hover {
    color: var(--nhk-teal-hover);
}

/* ======================== Buttons ======================== */
.btn-primary {
    background: var(--nhk-teal);
    border-color: var(--nhk-teal);
    border-radius: var(--nhk-radius);
    font-weight: 600;
    font-size: .9375rem;
    padding: .55rem 1.75rem;
    transition: background .2s ease, box-shadow .2s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--nhk-teal-hover);
    border-color: var(--nhk-teal-hover);
    box-shadow: 0 2px 8px rgba(28, 183, 173, .25);
}

.btn-primary:active {
    background: var(--nhk-teal-hover) !important;
    border-color: var(--nhk-teal-hover) !important;
}

.btn-outline-primary {
    color: var(--nhk-teal);
    border-color: var(--nhk-teal);
    border-radius: var(--nhk-radius);
    font-weight: 600;
    font-size: .9375rem;
    padding: .55rem 1.75rem;
    transition: all .2s ease;
}

.btn-outline-primary:hover {
    background: var(--nhk-teal);
    border-color: var(--nhk-teal);
    color: #fff;
}

.btn-warning {
    background: var(--nhk-teal);
    border-color: var(--nhk-teal);
    color: #fff;
    border-radius: var(--nhk-radius);
    font-weight: 600;
    font-size: .875rem;
    padding: .5rem 1.5rem;
    transition: background .2s ease;
}

.btn-warning:hover {
    background: var(--nhk-teal-hover);
    border-color: var(--nhk-teal-hover);
    color: #fff;
}

.btn-danger {
    border-radius: var(--nhk-radius);
    font-weight: 600;
    font-size: .8125rem;
    padding: .375rem 1rem;
}

.btn-secondary {
    border-radius: var(--nhk-radius);
    font-weight: 600;
    font-size: .9375rem;
    padding: .55rem 1.75rem;
    background: var(--nhk-bg-subtle);
    border-color: var(--nhk-border);
    color: var(--nhk-text);
}

.btn-secondary:hover {
    background: var(--nhk-bg-tertiary);
    border-color: var(--nhk-border-dark);
    color: var(--nhk-text);
}

/* ======================== Container ======================== */
.main-container {
    max-width: var(--nhk-max-width);
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* ======================== Article Detail ======================== */
.article-detail h1 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.article-detail .article-meta {
    font-size: .9375rem;
    color: var(--nhk-text-secondary);
    margin-bottom: 1.5rem;
}

.article-detail .article-featured-image {
    width: 100%;
    border-radius: 0;
    margin-bottom: 1.5rem;
}

.article-detail .article-content {
    font-size: 1.1875rem;
    line-height: 1.9;
    color: var(--nhk-text);
}

.article-detail .article-content p {
    margin-bottom: 1.25rem;
}

/* ======================== Comment Section ======================== */
.comment-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--nhk-border);
}

.comment-card {
    border: 1px solid var(--nhk-border);
    border-radius: var(--nhk-radius-sm);
    background: var(--nhk-bg);
    margin-bottom: 1rem;
    padding: 1rem 1.25rem;
}

.comment-card .comment-author {
    font-weight: 600;
    font-size: .9375rem;
    color: var(--nhk-text);
}

.comment-card .comment-date {
    font-size: .8125rem;
    color: var(--nhk-border-dark);
}

.comment-card .comment-body {
    font-size: 1rem;
    color: var(--nhk-text-secondary);
    line-height: 1.7;
    margin-top: .5rem;
}

/* ======================== Forms ======================== */
.form-control {
    border: 1px solid var(--nhk-border);
    border-radius: var(--nhk-radius-sm);
    font-size: .9375rem;
    padding: .625rem .875rem;
    color: var(--nhk-text);
    transition: border-color .2s ease, box-shadow .2s ease;
}

.form-control:focus {
    border-color: var(--nhk-teal);
    box-shadow: 0 0 0 3px rgba(28, 183, 173, .12);
}

.form-label {
    font-size: .875rem;
    font-weight: 600;
    color: var(--nhk-text-secondary);
    margin-bottom: .375rem;
}

.form-select {
    border: 1px solid var(--nhk-border);
    border-radius: var(--nhk-radius-sm);
    font-size: .875rem;
    padding: .625rem .875rem;
    color: var(--nhk-text);
}

.form-select:focus {
    border-color: var(--nhk-teal);
    box-shadow: 0 0 0 3px rgba(28, 183, 173, .12);
}

/* ======================== Tables ======================== */
.table {
    border-collapse: collapse;
    font-size: .875rem;
}

.table thead th {
    background: var(--nhk-bg-subtle);
    border-bottom: 2px solid var(--nhk-border);
    font-weight: 600;
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--nhk-text-secondary);
    padding: .75rem 1rem;
}

.table tbody td {
    border-bottom: 1px solid var(--nhk-border);
    padding: .75rem 1rem;
    vertical-align: middle;
    color: var(--nhk-text);
}

.table tbody tr:hover {
    background: var(--nhk-bg-subtle);
}

/* ======================== Cards in Admin ======================== */
.admin-card {
    border: 1px solid var(--nhk-border);
    border-radius: 0;
    box-shadow: none;
    transition: box-shadow .2s ease;
}

.admin-card:hover {
    box-shadow: var(--nhk-shadow);
}

.admin-card .card-body {
    padding: 1.5rem;
}

/* ======================== Sidebar Admin ======================== */
.admin-sidebar {
    background: var(--nhk-bg-subtle);
    border-right: 1px solid var(--nhk-border);
    min-height: calc(100vh - 57px);
    padding: 1.5rem 1rem;
}

.admin-sidebar h5 {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--nhk-border-dark);
    margin-bottom: 1rem;
}

.admin-sidebar .nav-link {
    color: var(--nhk-text-secondary);
    font-size: .875rem;
    padding: .5rem .75rem;
    border-radius: var(--nhk-radius-sm);
    margin-bottom: .125rem;
    transition: background .15s ease, color .15s ease;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    background: #fff;
    color: var(--nhk-teal);
}

.admin-sidebar .nav-link.text-danger:hover {
    background: #fce9e9;
    color: #c91b1b;
}

/* ======================== Pagination ======================== */
.pagination .page-link {
    border: 1px solid var(--nhk-border);
    color: var(--nhk-text-secondary);
    font-size: .875rem;
    padding: .4rem .9375rem;
    border-radius: var(--nhk-radius-sm);
    margin: 0 .125rem;
}

.pagination .page-link:hover {
    background: var(--nhk-bg-subtle);
    color: var(--nhk-text);
    border-color: var(--nhk-border);
}

.pagination .page-item.active .page-link {
    background: var(--nhk-teal);
    border-color: var(--nhk-teal);
    color: #fff;
}

.pagination .page-item.disabled .page-link {
    color: var(--nhk-border-light);
    border-color: var(--nhk-border);
}

/* ======================== Alert / Notification ======================== */
.alert {
    border-radius: var(--nhk-radius);
    font-size: .875rem;
    border: none;
}

.alert-success {
    background: var(--nhk-teal-light);
    color: #106660;
}

.alert-danger {
    background: #fce9e9;
    color: #700f0f;
}

/* ======================== Footer ======================== */
.site-footer {
    background: var(--nhk-bg-subtle);
    border-top: 1px solid var(--nhk-border);
    padding: 2rem 0;
    margin-top: 3rem;
    font-size: .875rem;
    color: var(--nhk-text-secondary);
}

.site-footer .container {
    max-width: var(--nhk-max-width);
}

/* ======================== Login Page ======================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--nhk-bg-subtle);
}

.login-card {
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--nhk-border);
    border-radius: var(--nhk-radius);
    background: var(--nhk-bg);
    padding: 2rem;
}

.login-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1.5rem;
}

/* ======================== Section Title ======================== */
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: .75rem;
    border-bottom: 2px solid var(--nhk-text);
}

/* ======================== Search Input ======================== */
.input-group .form-control {
    border-right: none;
}

.input-group .btn {
    border-left: none;
}

/* ======================== Modal ======================== */
.modal-content {
    border-radius: var(--nhk-radius);
    border: 1px solid var(--nhk-border);
    box-shadow: var(--nhk-shadow-hover);
}

.modal-header {
    border-bottom: 1px solid var(--nhk-border);
    padding: 1rem 1.25rem;
}

.modal-footer {
    border-top: 1px solid var(--nhk-border);
    padding: 1rem 1.25rem;
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 700;
}

/* ======================== Responsive ======================== */
@media (max-width: 767px) {
    .hero-card .card-img-top {
        height: 240px;
    }

    .hero-card .card-title {
        font-size: 1.5rem;
    }

    .article-card .card-img-top {
        height: 180px;
    }

    .article-detail h1 {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .admin-sidebar {
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--nhk-border);
    }

    .login-card {
        margin: 1rem;
        padding: 1.5rem;
    }
}