/* ================================================================
   RESEARCH PAGES – Shared Styles
   Used by: thi-truong, chuyen-sau, doanh-nghiep, nhom-nganh
   Prefix: rp-  (research-page)
   ================================================================ */

/* ---- Reset & Base ---- */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Be Vietnam Pro', sans-serif;
    background: #07070D;
    color: #e2e8f0;
    min-height: 100vh;
}

/* ---- Header overrides (subpage alignment) ---- */
.tv-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 5%; height: 72px;
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.tv-left { display: flex; align-items: center; gap: 2rem; }
.neon-logo {
    height: 70px; width: auto;
    filter: drop-shadow(0 0 8px #a855f7) drop-shadow(0 0 15px rgba(168,85,247,0.8));
    transition: all 0.3s ease;
}
.neon-logo:hover {
    filter: drop-shadow(0 0 12px #c084fc) drop-shadow(0 0 25px rgba(192,132,252,1));
    transform: scale(1.05);
}
.tv-nav { display: flex; gap: 2rem; align-items: center; list-style: none; }
.tv-nav a {
    font-size: 0.9rem; font-weight: 600; color: #fff; opacity: 0.8;
    transition: opacity 0.2s, color 0.2s, text-shadow 0.2s; text-decoration: none; white-space: nowrap;
}
.tv-nav .nav-item.dropdown > a span {
    display: inline-block;
    transition: transform 0.2s ease;
}
.tv-nav a:hover,
.tv-nav .nav-item:hover > a {
    opacity: 1;
    color: #c084fc;
    text-shadow: 0 0 10px rgba(192, 132, 252, 0.8), 0 0 20px rgba(192, 132, 252, 0.4);
}
.tv-nav a.active-page,
.tv-nav a.active-nav,
.tv-nav .nav-item.active-nav > a,
.tv-nav .nav-item.dropdown.active-nav > a {
    opacity: 1;
    color: #c084fc !important;
    text-shadow: 0 0 10px rgba(192, 132, 252, 0.8), 0 0 20px rgba(192, 132, 252, 0.4) !important;
}
.tv-right { display: flex; align-items: center; gap: 1rem; }
.btn-tv-blue {
    background: linear-gradient(135deg, #7c3aed, #a855f7); color: #fff;
    border: none; border-radius: 8px; padding: 8px 20px;
    font-weight: 700; font-size: 0.85rem; cursor: pointer; transition: all 0.3s ease;
}
.btn-tv-blue:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(168,85,247,0.4); }

/* ---- Page Layout ---- */
.rp-page-wrapper {
    min-height: 100vh;
    padding-top: 90px;
    transition: padding-top 0.2s cubic-bezier(0.16, 1, 0.3, 1), padding-right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
/* padding-top is managed dynamically by demo-nav.js syncSubmenuOffset */
.rp-page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
    transition: max-width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Push Layout on Desktop when Drawer is Open */
@media (min-width: 1025px) {
    body.rp-drawer-open .rp-page-wrapper {
        padding-right: 380px;
    }
}
@media (min-width: 769px) and (max-width: 1024px) {
    body.rp-drawer-open .rp-page-wrapper {
        padding-right: 340px;
    }
}

/* ================================================================
   HERO SECTION – Compact
   ================================================================ */
.rp-hero {
    text-align: center;
    padding: 1.25rem 0 0.75rem;
}
.rp-hero h1 {
    font-size: clamp(1.3rem, 2.5vw, 1.75rem);
    font-weight: 900;
    background: linear-gradient(135deg, #fff 30%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: -0.3px;
}
.rp-hero p {
    color: #64748b;
    font-size: 0.82rem;
    max-width: 550px;
    margin: 0 auto;
    line-height: 1.5;
}

/* ================================================================
   FEATURED ARTICLE – Balanced Research Highlight
   ================================================================ */
.rp-featured {
    margin-bottom: 1.75rem;
    display: none; /* shown by JS */
}
.rp-featured.rp-visible { display: block; }

.rp-featured-card {
    background: linear-gradient(135deg, rgba(25,25,42,0.65) 0%, rgba(18,18,32,0.55) 100%);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    display: grid;
    grid-template-columns: 39% 61%;
    height: 310px;
    min-height: 280px;
    max-height: 320px;
    overflow: hidden;
    backdrop-filter: blur(12px);
    transition: border-color 0.35s ease, box-shadow 0.35s ease;
}
.rp-featured-card:hover {
    border-color: rgba(168,85,247,0.28);
    box-shadow:
        0 4px 30px rgba(168,85,247,0.12),
        0 0 0 1px rgba(168,85,247,0.08);
}

/* Featured thumbnail – 39% width, exact card height */
.rp-featured-thumb {
    position: relative;
    height: 100%;
    overflow: hidden;
}
.rp-featured-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center 20%;
    transition: transform 0.5s ease;
}
.rp-featured-card:hover .rp-featured-thumb img { transform: scale(1.03); }

/* Lock overlay on featured */
.rp-featured-lock {
    position: absolute; inset: 0;
    background: rgba(10,10,15,0.75);
    backdrop-filter: blur(4px);
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 8px;
    z-index: 2;
}
.rp-featured-lock .rp-lock-icon {
    width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg, #eab308, #ca8a04);
    display: flex; align-items: center; justify-content: center;
    color: #000; font-size: 1rem;
    box-shadow: 0 4px 12px rgba(234,179,8,0.3);
}
.rp-featured-lock .rp-lock-text {
    font-size: 0.72rem; font-weight: 700; color: #fef08a; text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Featured content body – 52% width, balanced padding */
.rp-featured-body {
    padding: 1.35rem 1.65rem;
    display: flex; flex-direction: column; justify-content: center; gap: 0.5rem;
}
.rp-featured-kicker {
    font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1.5px;
    display: inline-flex; align-items: center; gap: 6px;
}
.rp-featured-title {
    font-size: clamp(1.4rem, 1.75vw, 1.65rem);
    font-weight: 800; line-height: 1.35;
    color: #fff; text-decoration: none;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color 0.25s ease;
}
.rp-featured-title:hover { color: #c084fc; }
.rp-featured-excerpt {
    color: #94a3b8; font-size: 0.92rem; line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}
.rp-featured-meta {
    display: flex; align-items: center; gap: 0.85rem;
    font-size: 0.76rem; color: #64748b; flex-wrap: wrap;
    margin-top: 0.1rem;
}
.rp-featured-meta span {
    display: flex; align-items: center; gap: 5px;
}
.rp-featured-btn {
    display: inline-flex; align-items: center; gap: 6px;
    background: linear-gradient(135deg, #7c3aed, #a855f7);
    color: #fff; border: none; border-radius: 8px;
    padding: 7.5px 22px; font-weight: 700; font-size: 0.82rem;
    cursor: pointer; transition: all 0.3s ease;
    text-decoration: none; align-self: flex-start;
    margin-top: 0.25rem;
    box-shadow: 0 2px 10px rgba(124,58,237,0.2);
}
.rp-featured-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 18px rgba(168,85,247,0.38);
}

/* ================================================================
   RECENT ARTICLES SECTION – 3×2 Grid
   ================================================================ */
.rp-recent-section { margin-bottom: 2rem; }
.rp-section-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding-bottom: 0.75rem;
}
.rp-section-header h2 {
    font-size: 1.1rem; font-weight: 700; color: #fff;
    display: flex; align-items: center; gap: 8px;
}
.rp-section-header h2 i { color: #a855f7; font-size: 0.95rem; }

.rp-recent-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

/* ================================================================
   ARTICLE CARD – used in recent grid
   ================================================================ */
.rp-card {
    background: rgba(20,20,30,0.5);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    display: flex; flex-direction: column;
}
.rp-card:hover {
    transform: translateY(-3px);
    border-color: rgba(168,85,247,0.25);
    box-shadow: 0 8px 25px rgba(0,0,0,0.35);
}

/* Card thumbnail */
.rp-card-thumb {
    position: relative; height: 155px; overflow: hidden;
    background: #111;
}
.rp-card-thumb img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.4s ease;
}
.rp-card:hover .rp-card-thumb img { transform: scale(1.05); }

.rp-card-badge {
    position: absolute; top: 10px; left: 10px;
    background: rgba(168,85,247,0.85); color: #fff;
    font-size: 0.68rem; font-weight: 700;
    padding: 2px 8px; border-radius: 4px;
    text-transform: uppercase; z-index: 3;
}

/* Card lock overlay */
.rp-card-lock {
    position: absolute; inset: 0;
    background: rgba(10,10,15,0.75);
    backdrop-filter: blur(4px);
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 6px;
    opacity: 0; pointer-events: none; transition: opacity 0.25s ease;
    z-index: 2;
}
.rp-card.is-locked .rp-card-lock { opacity: 1; pointer-events: auto; }
.rp-card-lock .rp-lock-icon {
    width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg, #eab308, #ca8a04);
    display: flex; align-items: center; justify-content: center;
    color: #000; font-size: 0.9rem;
    box-shadow: 0 3px 8px rgba(234,179,8,0.3);
}
.rp-card-lock .rp-lock-text {
    font-size: 0.68rem; font-weight: 700; color: #fef08a; text-transform: uppercase;
}

/* Card body */
.rp-card-body {
    padding: 0.85rem 1rem 1rem;
    display: flex; flex-direction: column; gap: 0.35rem; flex: 1;
}
.rp-card-title {
    font-size: 0.92rem; font-weight: 700; line-height: 1.4;
    color: #fff; text-decoration: none;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color 0.2s;
}
.rp-card-title:hover { color: #c084fc; }
.rp-card-meta {
    display: flex; align-items: center; gap: 0.75rem;
    font-size: 0.72rem; color: #64748b;
}
.rp-card-meta span {
    display: flex; align-items: center; gap: 4px;
}
.rp-card-excerpt {
    color: #94a3b8; font-size: 0.8rem; line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    margin-top: 0.15rem;
}

/* ================================================================
   DRAWER – Toggle Button (fixed right edge)
   ================================================================ */
.rp-drawer-toggle {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    background: linear-gradient(180deg, #7c3aed, #a855f7);
    color: #fff;
    border: none;
    border-radius: 10px 0 0 10px;
    padding: 18px 11px;
    font-family: 'Be Vietnam Pro', sans-serif;
    font-weight: 700;
    font-size: 0.78rem;
    cursor: pointer;
    z-index: 200;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    box-shadow: -3px 0 18px rgba(168,85,247,0.25);
}
.rp-drawer-toggle:hover {
    padding-right: 16px;
    box-shadow: -5px 0 25px rgba(168,85,247,0.45);
    background: linear-gradient(180deg, #6d28d9, #9333ea);
}
.rp-drawer-toggle i {
    writing-mode: horizontal-tb;
    font-size: 0.85rem;
}

/* ================================================================
   DRAWER – Overlay (Disabled for push layout)
   ================================================================ */
.rp-drawer-overlay {
    display: none !important;
}

/* ================================================================
   DRAWER – Side Panel (Push Layout, Below Header)
   ================================================================ */
.rp-drawer {
    position: fixed;
    top: calc(72px + var(--pinned-submenu-height, 0px));
    right: 0;
    width: 380px;
    max-width: 92vw;
    height: calc(100vh - 72px - var(--pinned-submenu-height, 0px));
    height: calc(100dvh - 72px - var(--pinned-submenu-height, 0px));
    background: #0c0c16;
    border-left: 1px solid rgba(255,255,255,0.08);
    z-index: 990; /* below header z-index 1000 */
    display: flex; flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), top 0.2s cubic-bezier(0.16, 1, 0.3, 1), height 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -8px 0 30px rgba(0,0,0,0.4);
}
.rp-drawer.rp-active { transform: translateX(0); }

/* Drawer header */
.rp-drawer-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    flex-shrink: 0;
}
.rp-drawer-header h3 {
    font-size: 1rem; font-weight: 700; color: #fff;
    display: flex; align-items: center; gap: 8px;
}
.rp-drawer-header h3 i { color: #a855f7; }
.rp-drawer-close {
    width: 32px; height: 32px; border-radius: 8px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    color: #94a3b8; font-size: 1rem;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
}
.rp-drawer-close:hover {
    background: rgba(239,68,68,0.15);
    border-color: rgba(239,68,68,0.3);
    color: #f87171;
}

/* Drawer search */
.rp-drawer-search {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    position: relative;
    flex-shrink: 0;
}
.rp-drawer-search i {
    position: absolute; left: 1.75rem; top: 50%;
    transform: translateY(-50%);
    color: #475569; font-size: 0.82rem; pointer-events: none;
}
.rp-drawer-search input {
    width: 100%;
    padding: 9px 14px 9px 34px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(15,15,25,0.6);
    color: #fff; font-size: 0.82rem;
    font-family: 'Be Vietnam Pro', sans-serif;
    outline: none; transition: all 0.2s;
}
.rp-drawer-search input:focus {
    border-color: #a855f7;
    box-shadow: 0 0 8px rgba(168,85,247,0.2);
}
.rp-drawer-search input::placeholder { color: #475569; }

/* Drawer article count */
.rp-drawer-count {
    padding: 0.5rem 1.25rem;
    font-size: 0.72rem; color: #475569; font-weight: 600;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    flex-shrink: 0;
}

/* Drawer scrollable list */
.rp-drawer-list {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(168,85,247,0.3) transparent;
}
.rp-drawer-list::-webkit-scrollbar { width: 5px; }
.rp-drawer-list::-webkit-scrollbar-track { background: transparent; }
.rp-drawer-list::-webkit-scrollbar-thumb {
    background: rgba(168,85,247,0.25);
    border-radius: 10px;
}
.rp-drawer-list::-webkit-scrollbar-thumb:hover {
    background: rgba(168,85,247,0.45);
}

/* ================================================================
   DRAWER – Article Item
   ================================================================ */
.rp-drawer-item {
    display: flex; gap: 12px;
    padding: 12px 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    text-decoration: none;
    transition: background 0.2s;
    cursor: pointer;
}
.rp-drawer-item:hover {
    background: rgba(168,85,247,0.06);
}
.rp-drawer-item-thumb {
    width: 72px; min-width: 72px; height: 50px;
    border-radius: 6px; overflow: hidden;
    background: #111; flex-shrink: 0;
}
.rp-drawer-item-thumb img {
    width: 100%; height: 100%; object-fit: cover;
}
.rp-drawer-item-info {
    flex: 1; min-width: 0;
    display: flex; flex-direction: column; justify-content: center; gap: 3px;
}
.rp-drawer-item-title {
    font-size: 0.82rem; font-weight: 600; color: #e2e8f0;
    line-height: 1.35;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color 0.2s;
}
.rp-drawer-item:hover .rp-drawer-item-title { color: #c084fc; }
.rp-drawer-item-meta {
    font-size: 0.7rem; color: #475569;
    display: flex; align-items: center; gap: 6px;
}
.rp-drawer-item-meta span {
    display: flex; align-items: center; gap: 3px;
}
.rp-drawer-item-lock {
    color: #eab308; font-size: 0.7rem; margin-right: 2px;
}

/* ================================================================
   STATES – Loading, Empty, Error
   ================================================================ */
.rp-loading-state,
.rp-empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    background: rgba(30,30,45,0.15);
    border-radius: 14px;
    border: 1px dashed rgba(255,255,255,0.06);
    grid-column: 1 / -1;
}
.rp-loading-state p,
.rp-empty-state p { color: #64748b; font-size: 0.85rem; }
.rp-empty-state i {
    font-size: 2rem; color: #475569; margin-bottom: 0.75rem;
    display: block;
}
.rp-empty-state h3 {
    font-size: 1.05rem; color: #fff; margin-bottom: 0.35rem;
}

/* Drawer empty */
.rp-drawer-empty {
    text-align: center; padding: 3rem 1.25rem;
    color: #475569; font-size: 0.85rem;
}
.rp-drawer-empty i {
    font-size: 1.75rem; margin-bottom: 0.75rem; display: block; color: #334155;
}

/* Spinner */
@keyframes rp-spin { to { transform: rotate(360deg); } }
.rp-spinner {
    width: 28px; height: 28px;
    border: 3px solid rgba(168,85,247,0.12);
    border-top-color: #a855f7;
    border-radius: 50%;
    animation: rp-spin 0.7s linear infinite;
    margin: 0 auto 0.75rem;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
    .rp-recent-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .tv-nav { display: none; }

    .rp-hero { padding: 1rem 0 0.5rem; }
    .rp-hero h1 { font-size: 1.2rem; }
    .rp-hero p { font-size: 0.78rem; }

    .rp-featured-card {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    .rp-featured-thumb { min-height: 200px; max-height: 250px; }
    .rp-featured-thumb img { object-position: center center; }
    .rp-featured-body { padding: 1.25rem 1.35rem; gap: 0.65rem; }
    .rp-featured-title { font-size: 1.2rem; -webkit-line-clamp: 2; }

    .rp-recent-grid { grid-template-columns: 1fr; gap: 1rem; }

    .rp-drawer-toggle {
        top: auto;
        bottom: 24px;
        right: 16px;
        transform: none;
        writing-mode: horizontal-tb;
        text-orientation: initial;
        border-radius: 12px;
        padding: 10px 16px;
        font-size: 0.78rem;
        box-shadow: 0 4px 20px rgba(168,85,247,0.35);
    }
    .rp-drawer-toggle:hover { padding-right: 16px; }

    .rp-drawer {
        top: calc(72px + var(--pinned-submenu-height, 0px));
        width: 100%;
        max-width: 100vw;
        height: calc(100vh - 72px - var(--pinned-submenu-height, 0px));
    }

    .rp-section-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}

@media (max-width: 480px) {
    .rp-page-container { padding: 0 1rem 2rem; }
    .rp-card-thumb { height: 130px; }
    .rp-featured-title { font-size: 1.05rem; }
    .rp-featured-excerpt { font-size: 0.82rem; }
    .rp-featured-btn { padding: 8px 20px; font-size: 0.8rem; }
}

/* ================================================================
   PAGINATION – Recent Articles Section (Center Aligned)
   ================================================================ */
.rp-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 2.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    width: 100%;
}

.rp-page-btn {
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    border-radius: 10px;
    background: rgba(20, 20, 30, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #94a3b8;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    user-select: none;
}

.rp-page-btn:hover:not(.disabled):not(.active) {
    background: rgba(168, 85, 247, 0.2);
    border-color: rgba(168, 85, 247, 0.4);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.2);
}

.rp-page-btn.active {
    background: linear-gradient(135deg, #a855f7, #7c3aed);
    border-color: #a855f7;
    color: #fff;
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.4);
    cursor: default;
}

.rp-page-btn.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    border-color: rgba(255, 255, 255, 0.04);
    background: rgba(20, 20, 30, 0.3);
}

.rp-page-dots {
    color: #64748b;
    padding: 0 4px;
    font-weight: 700;
    font-size: 0.9rem;
}