/* ============================================
   styles.css — asosiy index.html uchun
   (wrapper, iframe transitions, navigation)
   Variables va reset uchun base.css ga qarang.
   ============================================ */

@import url("base.css");

.presentation {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.slide-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    background: var(--color-navy);
    opacity: 0;
    visibility: hidden;
    transform: translateX(40px);
    transition: opacity var(--transition), transform var(--transition), visibility 0s linear var(--transition);
}

.slide-frame.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
    transition: opacity var(--transition), transform var(--transition), visibility 0s;
    z-index: 2;
}

.slide-frame.prev {
    transform: translateX(-40px);
}

/* ============================================
   Navigation bar
   ============================================ */

.nav-bar {
    pointer-events: none;
    z-index: 100;
}

.nav-hotzone {
    position: fixed;
    top: 0;
    bottom: 0;
    width: 140px;
    z-index: 99;
    pointer-events: auto;
}

.nav-hotzone-left { left: 0; }
.nav-hotzone-right { right: 0; }

.nav-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    background: var(--color-accent);
    color: var(--color-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity 0.25s ease, background 0.2s, transform 0.2s;
    pointer-events: auto;
    z-index: 100;
}

.nav-prev { left: 1.5rem; }
.nav-next { right: 1.5rem; }

.nav-hotzone-left:hover ~ .nav-prev:not(:disabled),
.nav-prev:not(:disabled):hover { opacity: 1; }

.nav-hotzone-right:hover ~ .nav-next:not(:disabled),
.nav-next:not(:disabled):hover { opacity: 1; }

.nav-btn:hover:not(:disabled) {
    background: var(--color-accent-dark);
    transform: translateY(-50%) scale(1.08);
}

.nav-btn:disabled {
    opacity: 0;
    pointer-events: none;
    cursor: not-allowed;
}

.slide-counter {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: 0.05em;
    background: rgba(10, 31, 60, 0.75);
    backdrop-filter: blur(10px);
    padding: 0.35rem 0.8rem;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    opacity: 0.75;
    pointer-events: auto;
    z-index: 100;
}

/* ============================================
   Progress bar
   ============================================ */

.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    z-index: 50;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-accent);
    transition: width var(--transition);
    box-shadow: 0 0 10px rgba(33, 150, 243, 0.5);
}

/* ============================================
   Hint
   ============================================ */

.hint {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(10, 31, 60, 0.85);
    color: var(--color-white);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.4s, transform 0.4s;
    pointer-events: none;
    backdrop-filter: blur(10px);
}

.hint.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}