frontend/animations.css

/* ==================== PREMIUM ANIMATIONS ==================== */

/* SMOOTH FADE IN UP */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 40px, 0);
    }

    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.animate-fade-up {
    animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    opacity: 0;
    /* Init hidden */
}

/* STAGGER DELAYS (utility classes) */
.delay-100 {
    animation-delay: 0.1s;
}

.delay-200 {
    animation-delay: 0.2s;
}

.delay-300 {
    animation-delay: 0.3s;
}

.delay-400 {
    animation-delay: 0.4s;
}

.delay-500 {
    animation-delay: 0.5s;
}

/* PULSING GLOW (for upload area) */
@keyframes pulseGlow {
    0% {
        box-shadow: 0 0 0 0 rgba(227, 245, 20, 0.1);
        border-color: rgba(255, 255, 255, 0.1);
    }

    50% {
        box-shadow: 0 0 30px 0 rgba(227, 245, 20, 0.2);
        border-color: rgba(227, 245, 20, 0.5);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(227, 245, 20, 0.1);
        border-color: rgba(255, 255, 255, 0.1);
    }
}

.animate-pulse-glow {
    animation: pulseGlow 3s infinite;
    will-change: box-shadow, border-color;
}

/* SHIMMER BORDER (for premium feel) */
@keyframes borderShimmer {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 200% 50%;
    }
}

/* FLOATING ELEMENT */
@keyframes floatY {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.animate-float {
    animation: floatY 6s ease-in-out infinite;
    will-change: transform;
    /* Hint for GPU promotion */
}

/* SCANNER LINE (High Performance - transform based) */
@keyframes scanLine {
    0% {
        transform: translateY(0%);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(100%);
        opacity: 0;
    }
}

.scanner-line {
    position: absolute;
    top: 0;
    /* Positioned at top, animated via transform */
    left: 0;
    right: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-yellow);
    box-shadow: 0 0 10px var(--accent-yellow);
    animation: scanLine 2s linear infinite;
    z-index: 10;
    pointer-events: none;
    will-change: transform, opacity;
    /* Hint for GPU */
}

/* ==================== ENHANCED PROCESSING OVERLAY ==================== */

/* Neural Spinner Animation */
@keyframes neuralPulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.8;
    }

    50% {
        transform: scale(1.1);
        opacity: 1;
    }
}

@keyframes spinRing {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.neural-spinner {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
}

.neural-spinner .spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--accent-yellow);
    border-radius: 50%;
    animation: spinRing 1.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.neural-spinner .spinner-ring:nth-child(2) {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border-top-color: rgba(227, 245, 20, 0.6);
    animation-duration: 2s;
    animation-direction: reverse;
}

.neural-spinner .spinner-ring:nth-child(3) {
    width: 50%;
    height: 50%;
    top: 25%;
    left: 25%;
    border-top-color: rgba(227, 245, 20, 0.3);
    animation-duration: 2.5s;
}

/* Progress Steps Animation */
@keyframes stepPulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.15);
        opacity: 1;
    }
}

@keyframes stepGlow {

    0%,
    100% {
        box-shadow: 0 0 10px rgba(227, 245, 20, 0.3);
    }

    50% {
        box-shadow: 0 0 20px rgba(227, 245, 20, 0.6);
    }
}

.progress-steps {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.4;
    transition: all 0.4s ease;
}

.progress-step .step-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.4s ease;
}

.progress-step .step-label {
    font-size: 12px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.progress-step.active {
    opacity: 1;
}

.progress-step.active .step-icon {
    background: rgba(227, 245, 20, 0.1);
    border-color: var(--accent-yellow);
    animation: stepPulse 2s ease-in-out infinite, stepGlow 2s ease-in-out infinite;
}

.progress-step.active .step-label {
    color: var(--accent-yellow);
}

.progress-step.completed {
    opacity: 0.7;
}

.progress-step.completed .step-icon {
    background: rgba(16, 185, 129, 0.1);
    border-color: #10B981;
}

.progress-step.completed .step-label {
    color: #10B981;
}

/* Processing Overlay Enhanced */
.processing-overlay-enhanced {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 20px;
}

.processing-content-enhanced {
    max-width: 600px;
    width: 100%;
    text-align: center;
    animation: fadeInUp 0.5s ease-out;
}

.model-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    margin-bottom: 20px;
    font-size: 13px;
}

.model-status-badge .status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-yellow);
    border-radius: 50%;
    animation: neuralPulse 2s ease-in-out infinite;
}

.model-status-badge .status-text {
    color: rgba(255, 255, 255, 0.8);
}

.processing-title-enhanced {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.processing-message {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 20px;
}

/* Warm-Up Alert */
.warmup-alert {
    margin-top: 30px;
    padding: 20px;
    background: rgba(227, 245, 20, 0.05);
    border: 1px solid rgba(227, 245, 20, 0.2);
    border-radius: 12px;
    text-align: left;
    display: flex;
    gap: 15px;
    animation: fadeInUp 0.5s ease-out;
}

.warmup-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.warmup-content h4 {
    margin: 0 0 10px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--accent-yellow);
}

.warmup-content p {
    margin: 8px 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.5;
}

.warmup-content .warmup-reason {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
}

.warmup-content .warmup-reassurance {
    font-size: 13px;
    color: #10B981;
    font-weight: 500;
}

/* ==================== ACCESSIBILITY: REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .animate-fade-up,
    .animate-float,
    .animate-pulse-glow {
        animation: none !important;
    }
}

/* Reduced animations on mobile for performance */
@media (max-width: 768px) {
    .animate-float {
        animation-duration: 8s;
    }

    .animate-pulse-glow {
        animation-duration: 4s;
    }

    .progress-steps {
        gap: 12px;
    }

    .progress-step .step-icon {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .progress-step .step-label {
        font-size: 10px;
    }

    .warmup-alert {
        flex-direction: column;
        text-align: center;
    }
}