/* =========================================================
   ABOUT US PAGE CSS - DSTCC
   ========================================================= */

/* 1. HERO BANNER ABOUT */
.about-hero {
    position: relative;
    height: 60vh;
    min-height: 400px;
    background:
        linear-gradient(rgba(0, 20, 60, 0.65), rgba(0, 20, 60, 0.80)),
        url('../image/themes_img_1.webp') center 35% / cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    margin-bottom: 60px;
}
.about-hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0;
    text-shadow: 2px 4px 10px rgba(0,0,0,0.5);
    animation: fadeInUp 1s ease-out;
}

/* 2. TỔNG QUAN (OVERVIEW) */
.about-overview {
    padding: 60px 0;
    background:
        linear-gradient(rgba(240,244,252,0.88), rgba(230,238,252,0.85)),
        url('../image/themes_img_3.webp') center / cover fixed;
    border-radius: var(--radius-lg);
    margin-bottom: 80px;
    position: relative;
    box-shadow: var(--shadow-md);
}
.about-overview::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-lg);
}
.about-overview .container {
    position: relative;
    z-index: 2;
}
.overview-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
    margin-top: 40px;
}
.stat-item .num {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Barlow Condensed', sans-serif;
    line-height: 1;
}
.stat-item .prefix {
    font-size: 2rem;
    color: var(--accent);
    vertical-align: super;
}
.stat-item .lbl {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    text-transform: uppercase;
    margin-top: 10px;
    letter-spacing: 1px;
}

/* 3. THƯ NGỎ (OPEN LETTER) */
.about-letter {
    position: relative;
    background:
        linear-gradient(rgba(0, 20, 50, 0.78), rgba(0, 15, 45, 0.82)),
        url('../image/themes_img_2.webp') center top / cover no-repeat fixed;
    padding: 100px 0;
    color: var(--white);
    margin-bottom: 80px;
}
.about-letter::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 37, 84, 0.75);
}
.letter-content {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 60px 50px;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.letter-content h2 {
    color: var(--accent);
    margin-bottom: 30px;
}
.letter-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 15px;
    color: #e2e8f0;
}

/* 4. TẦM NHÌN - SỨ MỆNH (VISION & MISSION) */
.vision-mission-row {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 50px;
}
.vm-flex {
    flex: 1 1 50%;
    min-width: 300px;
}
.vm-text {
    padding: 60px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.vm-text h3 {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 20px;
    text-transform: uppercase;
}
.vm-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.8;
}
.vm-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 350px;
}

@media(max-width: 768px) {
    .vm-reverse {
        flex-direction: column-reverse;
    }
}

/* 5. GIÁ TRỊ CỐT LÕI (CORE VALUES) */
.core-values {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(160deg, rgba(236,241,250,0.92) 0%, rgba(225,234,248,0.90) 100%),
        url('../image/themes_img_3.webp') center bottom / cover no-repeat;
}
.value-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    height: 100%;
    border-bottom: 4px solid transparent;
}
.value-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--accent);
}
.value-card h3 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}
.value-card p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* 6. ĐỘI NGŨ LÃNH ĐẠO (LEADERSHIP) - ẢNH LỚN THEO YÊU CẦU */
.leadership-section {
    padding: 90px 0;
    background: var(--white);
}
.leader-card-large {
    background: transparent;
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition);
    position: relative;
    /* Loại bỏ bóng và màu nền để làm giống layout lớn của Minh Đức */
}
.leader-card-large .leader-img {
    width: 100%;
    /* Tỉ lệ dọc hẹp, ảnh ngực trở lên (portrait) */
    aspect-ratio: 3/4;
    overflow: hidden;
    border-radius: 12px;
    background: #eef1f5;
}
.leader-card-large .leader-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.5s ease;
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.1));
}
.leader-card-large:hover .leader-img img {
    transform: scale(1.05);
}
.leader-card-large .leader-info {
    padding: 24px 10px 10px;
    text-align: left;
}
.leader-card-large .leader-name {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
    text-transform: uppercase;
}
.leader-card-large .leader-role {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    line-height: 1.4;
    border-left: 3px solid var(--accent);
    padding-left: 12px;
}

/* Modal if needed or specific layout tweaks */
.custom-swiper-pagination {
    text-align: center;
    margin-top: 30px;
}
.custom-swiper-pagination .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: var(--border);
    opacity: 1;
}
.custom-swiper-pagination .swiper-pagination-bullet-active {
    background: var(--accent);
    transform: scale(1.2);
}

/* ---- REVEAL ANIMATIONS ---- */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* =========================================================
   7. BAN CỐ VẤN CHUYÊN MÔN — REDESIGN
   ========================================================= */

.advisors-section {
    padding: 100px 0 110px;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}

/* Subtle decorative circle in background */
.advisors-section::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -120px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,63,127,0.05) 0%, transparent 70%);
    pointer-events: none;
}
.advisors-section::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245,168,0,0.06) 0%, transparent 70%);
    pointer-events: none;
}

/* --- Section Header --- */
.advisors-header {
    text-align: center;
    margin-bottom: 60px;
}
.advisors-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 3.5px;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(245, 168, 0, 0.12);
    padding: 5px 18px;
    border-radius: 20px;
    margin-bottom: 16px;
    border: 1px solid rgba(245, 168, 0, 0.25);
}
.advisors-subtitle {
    max-width: 600px;
    margin: 12px auto 24px;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.75;
}
.advisors-divider {
    width: 56px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin: 0 auto;
    border-radius: 2px;
}

/* --- Advisor Pro Card --- */
.apc-card {
    display: flex;
    align-items: flex-start;
    gap: 0;
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 16px rgba(0, 37, 84, 0.07);
    border: 1px solid rgba(0, 37, 84, 0.06);
    transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 100%;
}
.apc-card:hover {
    transform: translateY(-7px);
    box-shadow: 0 18px 48px rgba(0, 37, 84, 0.14);
}

/* Left accent column */
.apc-left {
    flex-shrink: 0;
    width: 110px;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 32px 12px 24px;
    gap: 10px;
    position: relative;
}
.apc-left::after {
    content: '';
    position: absolute;
    top: 0; right: 0; bottom: 0;
    width: 1px;
    background: rgba(255,255,255,0.15);
}

/* Color themes for left column */
.apc-left.color-navy {
    background: linear-gradient(160deg, #002554 0%, #003f7f 100%);
}
.apc-left.color-gold {
    background: linear-gradient(160deg, #c47a00 0%, #f5a800 100%);
}
.apc-left.color-teal {
    background: linear-gradient(160deg, #1a6952 0%, #25a07e 100%);
}
.apc-left.color-purple {
    background: linear-gradient(160deg, #5b3199 0%, #8b5cf6 100%);
}

/* Initials circle */
.apc-initials {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 1px;
    flex-shrink: 0;
    backdrop-filter: blur(4px);
}

/* Academic title badge */
.apc-badge {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: rgba(255,255,255,0.9);
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    padding: 4px 8px;
    border-radius: 6px;
    text-align: center;
    line-height: 1.3;
    word-break: break-word;
}

/* Right content */
.apc-right {
    flex: 1;
    padding: 28px 26px 24px 24px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.apc-name {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.15;
    margin-bottom: 4px;
}
.apc-role {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 12px;
}
.apc-desc {
    font-size: 0.93rem;
    color: #64748b;
    line-height: 1.68;
    margin-bottom: 16px;
    flex: 1;
}
.apc-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.apc-tags span {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 20px;
    background: var(--bg-light);
    color: var(--text-muted);
    border: 1px solid rgba(0,37,84,0.1);
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
}
.apc-card:hover .apc-tags span {
    background: rgba(0, 37, 84, 0.06);
    border-color: rgba(0, 37, 84, 0.18);
    color: var(--primary);
}

/* Mobile stacked layout */
@media (max-width: 500px) {
    .apc-card {
        flex-direction: column;
    }
    .apc-left {
        width: 100%;
        min-height: auto;
        flex-direction: row;
        padding: 20px 24px;
        gap: 16px;
        justify-content: flex-start;
    }
    .apc-initials {
        width: 54px;
        height: 54px;
        font-size: 1.1rem;
    }
    .apc-badge {
        font-size: 0.68rem;
        padding: 4px 10px;
    }
    .apc-right {
        padding: 20px 22px;
    }
}

/* =========================================================
   8. SWIPER LEADER SLIDER COMPONENT — REDESIGN
   ========================================================= */
.leader-slider-container {
    padding: 20px 15px 70px; /* Space for shadow & pagination */
    margin: 0 -15px; 
    overflow: hidden;
}

.leader-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 37, 84, 0.05); /* Slight navy shadow */
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    border: 1px solid rgba(0, 37, 84, 0.04);
}

.leader-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 36px rgba(0, 37, 84, 0.12);
}

/* Visual Header (Image or Fallback) */
.leader-visual {
    height: 190px;
    position: relative;
    background: linear-gradient(135deg, #eef1f5, #e2e8f0);
}

.leader-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.leader-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

/* Reuse existing apc gradient classes from about.css */
.leader-fallback.color-navy { background: linear-gradient(160deg, #002554 0%, #003f7f 100%); }
.leader-fallback.color-gold { background: linear-gradient(160deg, #c47a00 0%, #f5a800 100%); }
.leader-fallback.color-teal { background: linear-gradient(160deg, #1a6952 0%, #25a07e 100%); }
.leader-fallback.color-purple { background: linear-gradient(160deg, #5b3199 0%, #8b5cf6 100%); }

.leader-initials {
    font-size: 3rem;
    font-weight: 800;
    font-family: 'Barlow Condensed', sans-serif;
    line-height: 1;
}

.leader-initials i {
    font-size: 2.8rem;
}

.leader-badge {
    margin-top: 12px;
    background: rgba(255,255,255,0.2);
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255,255,255,0.25);
}

/* Card Content Sub-Layout */
.leader-content {
    padding: 24px 26px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.leader-name {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.leader-role {
    font-size: 0.95rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 14px;
}

.leader-desc {
    font-size: 0.95rem;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 24px;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Tags Footer */
.leader-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}

.leader-tags span {
    background: var(--bg-light);
    color: var(--text-muted);
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: 6px;
    font-weight: 600;
    border: 1px solid rgba(0, 37, 84, 0.08);
    transition: all 0.2s ease;
}

.leader-card:hover .leader-tags span {
    background: rgba(0, 37, 84, 0.05);
    border-color: rgba(0, 37, 84, 0.15);
    color: var(--primary);
}

/* Custom Swiper Controls (Desktop) */
.leader-slider-container .swiper-button-next,
.leader-slider-container .swiper-button-prev {
    color: var(--primary);
    background: var(--white);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    top: 40%;
    transition: all 0.3s ease;
}
.leader-slider-container .swiper-button-next:hover,
.leader-slider-container .swiper-button-prev:hover {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 6px 20px rgba(0, 37, 84, 0.2);
}
.leader-slider-container .swiper-button-next::after,
.leader-slider-container .swiper-button-prev::after {
    font-size: 1.2rem;
    font-weight: 800;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .leader-visual { height: 160px; }
    .leader-content { padding: 20px; }
    .leader-name { font-size: 1.35rem; }
}