/* ==========================================================================
   RƯỢU CỬU LONG - ANIMATIONS & MOTION SYSTEM
   Hiệu ứng chuyển động mượt mà, đậm chất nghệ thuật và chuẩn hiệu năng 60fps
   ========================================================================== */

/* --- 1. KEYFRAME ANIMATIONS --- */

/* Float up and down gently (for Chim Lạc, lotus, badges) */
@keyframes floatSlow {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-16px) rotate(1.5deg);
    }
}

/* Horizontal cloud drift */
@keyframes floatHorizontal {
    0% {
        transform: translateX(-5%);
    }
    50% {
        transform: translateX(5%);
    }
    100% {
        transform: translateX(-5%);
    }
}

/* Slow rotation for Bronze Drum (Trống Đồng) & Royal Dragon */
@keyframes spinSlow {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes spinSlowReverse {
    from {
        transform: rotate(360deg);
    }
    to {
        transform: rotate(0deg);
    }
}

/* Fade up reveal for titles and hero content */
@keyframes fadeUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade in scale */
@keyframes fadeInScale {
    0% {
        opacity: 0;
        transform: scale(0.92);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Hero bottle entrance from right to left */
@keyframes bottleSlideInRight {
    0% {
        opacity: 0;
        transform: translateX(80px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Golden pulse glow */
@keyframes pulseGold {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(197, 155, 39, 0.4);
        border-color: rgba(197, 155, 39, 0.6);
    }
    50% {
        box-shadow: 0 0 20px 4px rgba(197, 155, 39, 0.6);
        border-color: rgba(246, 226, 122, 1);
    }
}

/* Infinite Marquee */
@keyframes marqueeScroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* Button light sweep effect */
@keyframes sweepShine {
    0% {
        left: -100%;
        opacity: 0;
    }
    50% {
        opacity: 0.5;
    }
    100% {
        left: 200%;
        opacity: 0;
    }
}

/* Subtle breathing / heartbeat */
@keyframes breathEffect {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.03);
    }
}

/* --- 2. UTILITY ANIMATION CLASSES --- */
.anim-float {
    animation: floatSlow 6s ease-in-out infinite;
}

.anim-spin {
    animation: spinSlow 50s linear infinite;
}

.anim-spin-reverse {
    animation: spinSlowReverse 60s linear infinite;
}

.anim-pulse {
    animation: pulseGold 2.5s infinite;
}

.anim-breath {
    animation: breathEffect 4s ease-in-out infinite;
}

/* --- 3. SCROLL REVEAL OBSERVER STYLES --- */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(35px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.reveal-on-scroll.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

/* Image hover shine container */
.img-shine-hover {
    position: relative;
    overflow: hidden;
}

.img-shine-hover::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 20%;
    height: 200%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(30deg);
    pointer-events: none;
    transition: none;
}

.img-shine-hover:hover::after {
    left: 140%;
    transition: all 0.8s ease-in-out;
}