/* ==========================================================================
   Briefing Intro — Second-Stage Intro Screen
   Appears after the main logo splash finishes. Shows a live local clock,
   a staggered spring-in headline, and an "Enter Studio" action that
   reveals the site. Original component, built for Men With Brains Media.
   ========================================================================== */

.briefing-intro {
    position: fixed;
    inset: 0;
    z-index: 9998; /* just below #intro-splash's 9999, above the main site */
    display: flex;
    flex-direction: column;
    background: #050508;
    color: #F0F0FF;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.briefing-intro[hidden] { display: none; }
.briefing-intro.show {
    opacity: 1;
    transform: translateY(0);
}
.briefing-intro.exit {
    opacity: 0;
    transform: translateY(-24px);
}

.briefing-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 32rem;
    height: 32rem;
    transform: translate(-50%, -50%);
    background: rgba(255, 107, 26, 0.14);
    filter: blur(130px);
    pointer-events: none;
}

.briefing-topbar {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    font-family: var(--font-body);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(240, 240, 255, 0.55);
}
.briefing-clock {
    font-variant-numeric: tabular-nums;
}

.briefing-inner {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1.5rem;
}

.briefing-headline {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(2.4rem, 8vw, 5.5rem);
    line-height: 1.05;
}
.briefing-headline .b-line {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1),
                transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.briefing-intro.show .briefing-headline .b-line:nth-child(1) { transition-delay: 0.15s; }
.briefing-intro.show .briefing-headline .b-line:nth-child(2) { transition-delay: 0.30s; }
.briefing-intro.show .briefing-headline .b-line:nth-child(3) { transition-delay: 0.45s; }
.briefing-intro.show .briefing-headline .b-line {
    opacity: 1;
    transform: translateY(0);
}
.briefing-headline .b-line.highlight {
    background: var(--grad-saffron);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.briefing-sub {
    margin-top: 1.5rem;
    max-width: 30rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: rgba(240, 240, 255, 0.6);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s ease 0.6s, transform 0.7s ease 0.6s;
}
.briefing-intro.show .briefing-sub {
    opacity: 1;
    transform: translateY(0);
}

.briefing-enter-btn {
    margin-top: 2.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.75rem;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(8px);
    color: #F0F0FF;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s ease 0.75s, transform 0.7s ease 0.75s,
                border-color 0.3s ease, background 0.3s ease;
}
.briefing-intro.show .briefing-enter-btn {
    opacity: 1;
    transform: translateY(0);
}
.briefing-enter-btn:hover {
    border-color: var(--saffron);
    background: rgba(255,107,26,0.1);
}
.briefing-enter-btn i {
    animation: briefing-arrow-bounce 1.6s ease-in-out infinite;
}
@keyframes briefing-arrow-bounce {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(4px); }
}

@media (max-width: 600px) {
    .briefing-topbar { padding: 1.2rem 1.25rem; font-size: 0.62rem; }
}