/* ==========================================================================
   CoreSync Private — Room & Background
   Master background, mood overlays, sticky layout
   ========================================================================== */

/* ---------------------------------------------------------------------------
   Master background — pinned full viewport
   --------------------------------------------------------------------------- */

.room-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: var(--z-background);
    overflow: hidden;
}

.room-background__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.room-background--placeholder {
    display: none; /* Hide the placeholder div */
}

.room-background__video {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Cover the entire container */
    object-position: center; /* Center the video */
    filter: brightness(0.7); /* Slightly dim the video to improve text readability */
    transition: opacity var(--duration-mood) var(--ease-smooth); /* Smooth transition when video changes */
}

/* ---------------------------------------------------------------------------
   Mood overlay — changes by time of day
   --------------------------------------------------------------------------- */

.room-mood-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: var(--z-mood-overlay);
    pointer-events: none;
    transition: background-color var(--duration-mood) var(--ease-smooth),
                opacity var(--duration-mood) var(--ease-smooth);
}

/* Morning: warm amber light */
body.mood-morning .room-mood-overlay {
    background: linear-gradient(
        180deg,
        rgba(255, 183, 77, 0.08) 0%,
        rgba(255, 152, 0, 0.04) 50%,
        rgba(0, 0, 0, 0.2) 100%
    );
}

/* Midday: neutral soft light */
body.mood-midday .room-mood-overlay {
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.03) 0%,
        rgba(200, 200, 200, 0.02) 50%,
        rgba(0, 0, 0, 0.15) 100%
    );
}

/* Night: deep blue/indigo atmosphere */
body.mood-night .room-mood-overlay {
    background: linear-gradient(
        180deg,
        rgba(25, 25, 112, 0.12) 0%,
        rgba(15, 15, 60, 0.08) 50%,
        rgba(0, 0, 0, 0.4) 100%
    );
}

/* ---------------------------------------------------------------------------
   Fixed UI elements: Logo & Explore icon
   --------------------------------------------------------------------------- */

.room-logo {
    position: fixed;
    top: var(--space-lg);
    left: var(--space-lg);
    z-index: var(--z-fixed-ui);
    display: block;
    max-width: min(260px, 55vw);
    opacity: 0.9;
    transition: opacity var(--duration-fast) var(--ease-smooth);
}

.room-logo:hover {
    opacity: 1;
}

.room-logo__img {
    display: block;
    width: auto;
    height: 36px;
    max-width: 100%;
    object-fit: contain;
}

.room-explore-btn {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-fixed-ui);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    pointer-events: auto;
    transition: opacity var(--duration-fast) var(--ease-smooth);
}

.room-explore-btn:hover {
    opacity: 1;
}

.room-explore-btn.is-hidden {
    opacity: 0;
    pointer-events: none;
}

.room-explore-btn__icon {
    width: 24px;
    height: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.room-explore-btn__icon span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 1px;
    transition: transform var(--duration-fast) var(--ease-smooth),
                opacity var(--duration-fast) var(--ease-smooth);
}

/* ---------------------------------------------------------------------------
   Scroll content area
   --------------------------------------------------------------------------- */

.room-scroll {
    position: relative;
    z-index: var(--z-scroll-text);
    min-height: 300vh;
    pointer-events: none;
}

.room-scroll__section {
    height: 100vh;
    padding: var(--space-xl);
}

.room-scroll__text {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 600px;
    width: 90%;
    text-align: center;
    font-size: var(--text-xl);
    font-weight: 300;
    letter-spacing: var(--tracking-wide);
    line-height: var(--leading-relaxed);
    color: var(--color-text-primary);
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.5s var(--ease-smooth);
}

.room-scroll__text.is-visible {
    opacity: 1;
}

/* Hero welcome text (first section) */
.room-hero {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: var(--z-scroll-text);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    pointer-events: none;
    padding: var(--space-xl);
}

.room-hero__title {
    font-size: var(--text-3xl);
    font-weight: 300;
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-md);
    opacity: 0;
    transform: translateY(20px);
}

.room-hero__subtitle {
    font-size: var(--text-lg);
    font-weight: 300;
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-secondary);
    opacity: 0;
    transform: translateY(20px);
}

/* Hero enter animation */
.room-hero.is-loaded .room-hero__title {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 1.2s var(--ease-smooth) 0.3s,
                transform 1.2s var(--ease-smooth) 0.3s;
}

.room-hero.is-loaded .room-hero__subtitle {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 1.2s var(--ease-smooth) 0.8s,
                transform 1.2s var(--ease-smooth) 0.8s;
}

/* Fade hero on scroll */
.room-hero.is-scrolled {
    opacity: 0;
    transition: opacity 1.5s var(--ease-smooth);
}

/* ---------------------------------------------------------------------------
   Fixed UI element: Privacy Policy link (bottom-left)
   --------------------------------------------------------------------------- */

.room-privacy-link {
    position: fixed;
    bottom: var(--space-lg);
    left: var(--space-lg);
    z-index: var(--z-fixed-ui);
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--color-text-muted);
    transition: color var(--duration-fast) var(--ease-smooth),
                opacity var(--duration-fast) var(--ease-smooth);
}

.room-privacy-link:hover {
    color: var(--color-text-secondary);
}

.room-privacy-link__text {
    font-family: var(--font-primary);
    font-size: var(--text-xs);
    font-weight: 400;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
}

.room-privacy-link__icon {
    display: none;
}