/* ======================================
   REUSABLE COMPONENTS
   ====================================== */

/* ======================================
   UTILITY CLASSES
   ====================================== */

.hidden {
    display: none !important;
}

.article-error-hint {
    margin-top: 10px;
    font-size: 14px;
    color: #4a4a4a;
}

/* ======================================
   BUTTONS
   ====================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: var(--font-size-base, 14px);
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius, 6px);
    cursor: pointer;
    transition: background var(--transition-base, 0.2s ease), transform var(--transition-fast, 0.15s ease);
    text-decoration: none;
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md, 0 2px 6px rgb(0 0 0 / 15%));
}

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

/* Button Variants */
.btn-primary {
    background: var(--accent, #0056b3);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover, #005fa3);
}

.btn-secondary {
    background: var(--bg-tertiary, #2a2a2a);
    color: #fff;
}

.btn-secondary:hover {
    background: #333;
}

.btn-success {
    background: var(--success, #235a26);
    color: #fff;
}

.btn-success:hover {
    background: #388e3c;
}

.btn-danger {
    background: var(--error, #d32f2f);
    color: #fff;
}

.btn-danger:hover {
    background: #d32f2f;
}

/* Special Buttons */
.btn-hdr {
    background: var(--accent, #003d7a);
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius, 6px);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-base, 0.2s ease);
    font-size: var(--font-size-base, 14px);
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
}

.btn-hdr:hover {
    background: var(--accent-hover, #005fa3);
}

.category-btn {
    padding: 8px 16px;
    margin: 4px;
    border: 2px solid var(--accent, #007bff);
    border-radius: var(--border-radius, 6px);
    background: transparent;
    color: var(--text-primary, #333);
    cursor: pointer;
    transition: all var(--transition-base, 0.2s ease);
    font-size: var(--font-size-base, 14px);
    font-weight: 500;
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
}

.category-btn:hover {
    background: var(--accent, #003d7a);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md, 0 2px 6px rgb(0 0 0 / 15%));
}

.category-btn.active {
    background: var(--accent, #003d7a);
    color: #fff;
    font-weight: 600;
}

body.dark-mode .category-btn {
    color: #fff;
    border-color: var(--accent-light, #003d7a);
    background: rgb(0 61 122 / 15%);
}

body.dark-mode .category-btn:hover {
    background: var(--accent, #003d7a);
    color: #fff;
}

body.dark-mode .category-btn.active {
    background: var(--accent, #003d7a);
    color: #fff;
}

.btn-read-more,
.btn-source {
    display: inline-block;
    padding: 8px 16px;
    background: var(--accent, #0056b3);
    color: #fff;
    text-decoration: none;
    border-radius: var(--border-radius, 6px);
    font-size: var(--font-size-sm, 12px);
    font-weight: 600;
    transition: background var(--transition-base, 0.2s ease);
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
}

.btn-read-more:hover,
.btn-source:hover {
    background: var(--accent-hover, #005fa3);
}

/* Content History Buttons */
.content-btn {
    border: 1px solid var(--bg-tertiary, #ddd);
}

.content-btn.active {
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
}

/* ======================================
   MODALS
   ====================================== */

.modal-overlay,
.article-modal,
.content-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgb(0 0 0 / 70%);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    padding: var(--spacing-lg, 24px);
}

.modal-overlay.active,
.article-modal.active,
.content-modal.active {
    display: flex;
}

.modal-content,
.article-modal-content {
    background: var(--bg-primary, #fff);
    border-radius: var(--border-radius-large, 12px);
    max-width: 900px;
    width: 100%;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    position: relative;
    padding: var(--spacing-xl, 32px);
    box-shadow: var(--shadow-xl, 0 4px 24px rgb(0 0 0 / 20%));
}

.modal-close,
.article-modal-close {
    position: absolute;
    top: var(--spacing-md, 16px);
    right: var(--spacing-md, 16px);
    font-size: 32px;
    font-weight: bold;
    color: var(--text-secondary, #4a4a4a);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background var(--transition-base, 0.2s ease), color var(--transition-base, 0.2s ease);
}

.modal-close:hover,
.article-modal-close:hover {
    background: var(--bg-tertiary, #e0e0e0);
    color: var(--text-primary, #000);
}

body.dark-mode .modal-content,
body.dark-mode .article-modal-content {
    background: var(--bg-secondary, #222);
}

/* ======================================
   CARDS
   ====================================== */

.card {
    background: var(--bg-secondary, #f5f5f5);
    border-radius: var(--border-radius, 6px);
    padding: var(--spacing-lg, 24px);
    margin-bottom: var(--spacing-md, 16px);
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
    transition: transform var(--transition-base, 0.2s ease), box-shadow var(--transition-base, 0.2s ease);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md, 0 2px 6px rgb(0 0 0 / 15%));
}

body.dark-mode .card {
    background: var(--bg-secondary, #222);
}

/* ======================================
   FEED CONTROLS
   ====================================== */

.feed-controls {
    margin-bottom: var(--spacing-lg, 24px);
    padding: var(--spacing-md, 16px);
    text-align: center;
}

.feed-controls h2 {
    margin-bottom: var(--spacing-md, 16px);
    color: var(--text-primary, #333);
}

.category-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm, 8px);
}

/* ======================================
   DARK MODE TOGGLE
   ====================================== */

.dark-mode-toggle {
    background: var(--accent, #0056b3);
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius, 6px);
    cursor: pointer;
    font-size: var(--font-size-base, 14px);
    font-weight: 600;
    transition: background var(--transition-base, 0.2s ease);
}

.dark-mode-toggle:hover {
    background: var(--accent-hover, #005fa3);
}

.dark-mode-label {
    display: inline-block;
    margin-left: var(--spacing-sm, 8px);
    color: #fff;
    font-size: var(--font-size-base, 14px);
    font-weight: 500;
}

/* ======================================
   HISTORY STYLES
   ====================================== */

.history-tabs {
    margin-bottom: var(--spacing-md, 16px);
}

.history-item {
    background: var(--bg-secondary, #f5f5f5);
    padding: var(--spacing-md, 16px);
    margin-bottom: var(--spacing-md, 16px);
    border-radius: var(--border-radius, 6px);
    border-left: 4px solid var(--accent, #007bff);
    cursor: pointer;
    transition: transform var(--transition-fast, 0.15s ease), box-shadow var(--transition-fast, 0.15s ease);
    box-shadow: var(--shadow-sm, 0 2px 4px rgb(0 0 0 / 15%));
}

.history-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md, 0 2px 6px rgb(0 0 0 / 15%));
}

body.dark-mode .history-item {
    background: var(--bg-secondary, #222);
}

/* ======================================
   NOTIFICATION BUBBLE
   ====================================== */

.feed-notification {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%) translateY(-120%);
    background: linear-gradient(135deg, #2a3d70 0%, #3d2752 100%);
    color: #fff;
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgb(0 0 0 / 30%);
    z-index: 9999;
    cursor: pointer;
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    font-weight: 600;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.feed-notification:hover {
    transform: translateX(-50%) translateY(0) scale(1.05);
}

.notification-badge {
    background: rgb(255 255 255 / 30%);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

/* Scroll to top button */
.scroll-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #2a3d70 0%, #3d2752 100%);
    color: #fff;
    border: none;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgb(0 0 0 / 30%);
    z-index: 9998;
    opacity: 0;
    transform: scale(0);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-to-top-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgb(0 0 0 / 40%);
}

/* ======================================
   SPINNER / LOADING
   ====================================== */

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    border: 4px solid var(--bg-tertiary, #e0e0e0);
    border-top-color: var(--accent, #007bff);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.article-loading {
    text-align: center;
    padding: var(--spacing-xl, 32px);
}

.article-loading p {
    margin-top: var(--spacing-md, 16px);
    color: var(--text-secondary, #4a4a4a);
}

.article-error {
    text-align: center;
    padding: var(--spacing-xl, 32px);
    color: var(--text-secondary, #4a4a4a);
}

/* ======================================
   MOBILE RESPONSIVE
   ====================================== */

@media (width <=768px) {
    .modal-content,
    .article-modal-content {
        padding: var(--spacing-lg, 24px);
        max-height: 95vh;
    }

    .category-filter {
        gap: var(--spacing-xs, 4px);
    }

    .category-btn {
        padding: 6px 12px;
        font-size: var(--font-size-sm, 12px);
    }
}