/* ═══════════════════════════════════════════
   PRINCIPAL PAGE — Thông điệp Tổng Giám đốc
   ═══════════════════════════════════════════ */

/* ── Base ── */
.history-page {
    --history-bg: #f8fafc;
    --history-surface: #ffffff;
    --history-ink: #0f172a;
    --history-muted: #475569;
    --history-line: #e2e8f0;
    --history-accent: #991b1b;
    --history-accent-soft: #fee2e2;
    background: linear-gradient(180deg, #fffaf9 0%, var(--history-bg) 28%, #ffffff 100%);
    color: var(--history-ink);
}

.history-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

/* ═══════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════ */
.history-hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at top right, rgba(251, 191, 36, 0.16), transparent 28%),
        linear-gradient(135deg, #450a0a 0%, #7f1d1d 46%, #0f172a 100%);
}

.history-hero__media {
    position: absolute;
    inset: 0;
    opacity: 0.18;
}

.principal-page .history-hero__media {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
}

.history-hero__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.history-hero__grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
    gap: 40px;
    align-items: center;
    padding: 88px 0 72px;
}

.history-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.24);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.history-eyebrow--soft {
    background: var(--history-accent);
    border-color: transparent;
    color: #fff;
}

.history-title {
    margin: 16px 0 14px;
    font-size: clamp(2.4rem, 4.8vw, 4.6rem);
    line-height: 1.03;
    letter-spacing: -0.04em;
}

.history-lead {
    margin: 0;
    font-size: clamp(1.05rem, 1.45vw, 1.28rem);
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.92);
    max-width: 54rem;
}

/* ── Principal Hero — Redesigned (no redundant h1) ── */
.principal-hero__accent-line {
    width: 56px;
    height: 3px;
    margin: 20px 0 0;
    border-radius: 2px;
    background: linear-gradient(90deg, #fbbf24, #f59e0b 60%, rgba(245, 158, 11, 0.2));
}

.principal-hero__headline {
    margin: 18px 0 0;
    font-size: clamp(1.45rem, 2.6vw, 2.15rem);
    font-weight: 500;
    line-height: 1.55;
    letter-spacing: -0.01em;
    color: rgba(255, 255, 255, 0.95);
    max-width: 52ch;
    font-style: italic;
}

.principal-hero__subtext {
    margin: 16px 0 0;
    font-size: 0.92rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.01em;
}

.history-intro {
    margin: 20px 0 0;
    max-width: 62ch;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.82);
}

.history-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.history-badges span,
.history-source {
    font-size: 0.9rem;
}

.history-badges span {
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.history-hero__aside {
    display: grid;
    gap: 14px;
}

.history-quote {
    padding: 22px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.history-quote__label {
    display: inline-block;
    margin-bottom: 10px;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
}

.history-quote p {
    margin: 0;
    line-height: 1.8;
    font-size: 1rem;
}

.history-source {
    margin: 0;
    color: rgba(255, 255, 255, 0.78);
}

/* ═══════════════════════════════════════
   PRINCIPAL — Hero Quote Callout
   ═══════════════════════════════════════ */
.principal-hero-quote {
    position: relative;
    margin: 16px 0 0;
    padding: 0;
    border: none;
}

.principal-hero-quote__mark {
    font-size: 4rem;
    line-height: 0.5;
    color: rgba(245, 158, 11, 0.6);
    font-family: Georgia, 'Times New Roman', serif;
    position: absolute;
    left: -6px;
    top: -8px;
}

.principal-hero-quote .history-lead {
    padding-left: 28px;
    border-left: 3px solid rgba(245, 158, 11, 0.4);
    font-style: italic;
}

/* ═══════════════════════════════════════
   PRINCIPAL — Profile Card (Circular Avatar)
   ═══════════════════════════════════════ */
.principal-profile-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 36px 28px 32px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.principal-profile-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

/* Avatar ring — decorative gradient border */
.principal-profile-card__avatar-ring {
    padding: 4px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 30%, #dc2626 70%, #991b1b 100%);
    box-shadow:
        0 8px 32px rgba(245, 158, 11, 0.3),
        0 0 0 6px rgba(255, 255, 255, 0.06);
    margin-bottom: 20px;
}

.principal-profile-card__avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(15, 23, 42, 0.9);
}

.principal-profile-card__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 15%;
    transition: transform 0.6s ease;
}

.principal-profile-card:hover .principal-profile-card__avatar img {
    transform: scale(1.08);
}

/* Info section */
.principal-profile-card__info h2 {
    margin: 0 0 6px;
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: #ffffff;
}

.principal-profile-card__role {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.7);
}

/* Small quote teaser */
.principal-profile-card__quote {
    margin: 16px 0 0;
    padding: 12px 16px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.82rem;
    font-style: italic;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.75);
}

.principal-profile-card__quote i {
    color: rgba(245, 158, 11, 0.6);
    font-size: 0.7rem;
    margin-right: 4px;
}

/* ═══════════════════════════════════════
   SECTIONS — Generic
   ═══════════════════════════════════════ */
.history-section {
    padding: 72px 0;
}

.history-section--soft {
    background: linear-gradient(180deg, rgba(254, 242, 242, 0.72) 0%, rgba(248, 250, 252, 0.94) 100%);
}

.history-section__intro {
    max-width: 760px;
    margin-bottom: 28px;
}

.history-section__intro h2 {
    margin: 14px 0 10px;
    font-size: clamp(1.9rem, 3vw, 2.8rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.history-section__intro p {
    margin: 0;
    color: var(--history-muted);
    line-height: 1.78;
}

.history-card {
    border-radius: 28px;
    background: var(--history-surface);
    border: 1px solid rgba(226, 232, 240, 0.96);
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.06);
    padding: 26px 24px;
}

/* ═══════════════════════════════════════
   PRINCIPAL — Message Section
   ═══════════════════════════════════════ */
.principal-message-section {
    padding: 80px 0;
}

.principal-section-head {
    max-width: 780px;
    margin-bottom: 36px;
}

.principal-section-head h2 {
    margin: 14px 0 10px;
    font-size: clamp(1.9rem, 3vw, 2.8rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--history-ink);
}

.principal-section-head p {
    margin: 0;
    color: var(--history-muted);
    line-height: 1.78;
    font-size: 1.05rem;
}

/* Full-width message card */
.principal-message-card--full {
    border-radius: 28px;
    background: var(--history-surface);
    border: 1px solid rgba(226, 232, 240, 0.96);
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.06);
    padding: 48px 44px;
}

/* Quote callout inside message */
.principal-message-callout {
    position: relative;
    margin-bottom: 36px;
    padding: 28px 32px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(254, 242, 242, 0.8) 0%, rgba(255, 251, 235, 0.6) 100%);
    border-left: 4px solid var(--history-accent);
}

.principal-message-callout__label {
    display: inline-block;
    margin-bottom: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--history-accent);
}

.principal-message-callout p {
    margin: 0;
    font-size: clamp(1.1rem, 1.6vw, 1.35rem);
    font-weight: 600;
    line-height: 1.6;
    color: var(--history-accent);
    font-style: italic;
}

/* Greeting */
.principal-message-greeting {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--history-ink);
    margin-bottom: 8px;
}

/* Message body text */
.principal-message-copy {
    font-size: 1.02rem;
    line-height: 1.85;
    color: var(--history-muted);
}

.principal-message-copy p {
    margin: 0 0 16px;
}

.principal-message-copy p:last-child {
    margin-bottom: 0;
}

/* Closing message */
.principal-message-closing {
    margin-top: 32px;
    padding-top: 28px;
    border-top: 1px solid var(--history-line);
    font-size: 1.02rem;
    line-height: 1.85;
    color: var(--history-muted);
    font-style: italic;
}

.principal-message-closing p {
    margin: 0 0 12px;
}

.principal-message-closing p:last-child {
    margin-bottom: 0;
}

/* Signature block */
.principal-signature {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 2px solid var(--history-line);
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.principal-signature__line {
    width: 80px;
    height: 3px;
    margin-bottom: 18px;
    background: linear-gradient(90deg, transparent, var(--history-accent));
    border-radius: 2px;
}

.principal-signature strong {
    display: block !important;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--history-ink);
    margin-bottom: 6px;
}

.principal-signature span {
    display: block !important;
    font-size: 0.9rem;
    color: var(--history-muted);
    line-height: 1.5;
}

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media (max-width: 1100px) {
    .history-hero__grid {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .principal-hero__headline {
        font-size: clamp(1.35rem, 2.2vw, 1.85rem);
        max-width: 60ch;
    }

    .principal-profile-card {
        flex-direction: row;
        text-align: left;
        gap: 24px;
        padding: 28px 32px;
    }

    .principal-profile-card__avatar-ring {
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .principal-profile-card__avatar {
        width: 140px;
        height: 140px;
    }
}

@media (max-width: 720px) {
    .history-shell {
        width: min(100% - 24px, 1180px);
    }

    .history-hero__grid {
        padding: 64px 0 48px;
        gap: 24px;
    }

    .principal-hero__headline {
        font-size: 1.25rem;
        line-height: 1.6;
    }

    .principal-hero__accent-line {
        width: 40px;
        margin-top: 16px;
    }

    .principal-message-card--full {
        padding: 28px 20px;
        border-radius: 22px;
    }

    .principal-message-callout {
        padding: 20px 22px;
    }

    .principal-signature {
        text-align: left;
    }

    .principal-signature__line {
        margin-left: 0;
    }

    .history-section {
        padding: 56px 0;
    }

    .principal-message-section {
        padding: 56px 0;
    }

    .history-card {
        border-radius: 22px;
        padding: 22px 18px;
    }

    .principal-profile-card {
        flex-direction: column;
        text-align: center;
        padding: 24px 20px;
    }

    .principal-profile-card__avatar {
        width: 120px;
        height: 120px;
    }

    .principal-profile-card__info h2 {
        font-size: 1.1rem;
    }

    .principal-profile-card__quote {
        display: none;
    }
}