body {
    font-family: 'Inter', sans-serif;
    background-color: #111827;
    color: #F3F4F6;
}
.card {
    background-color: #1F2937;
    border: 1px solid #FF6B00;
    box-shadow: 0 4px 6px rgba(255, 107, 0, 0.1);
    transition: all 0.3s ease;
    animation: fadeIn 0.5s ease-out;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(255, 107, 0, 0.2);
}
.btn {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}
.btn:hover::after {
    width: 300px;
    height: 300px;
}
.btn-primary {
    background-color: #FF6B00;
    color: white;
    animation: pulse 2s infinite;
}
.btn-primary:hover {
    background-color: #FF8533;
    transform: scale(1.05);
}
.btn-secondary {
    background-color: #374151;
    color: white;
    border: 1px solid #FF6B00;
}
.btn-secondary:hover {
    background-color: #4B5563;
}
.emoji-display {
    display: none;
    font-size: 3rem;
    line-height: 1;
    text-shadow: 0 0 10px rgba(255, 107, 0, 0.2);
    animation: float 3s ease-in-out infinite;
}
.text-shadow-custom {
    text-shadow: 1px 1px 2px rgba(255, 107, 0, 0.3);
}
.qr-code-placeholder img {
    border: 4px solid #FF6B00;
    border-radius: 0.5rem;
}
.persona-image-container {
    width: 100%;
    max-width: 250px;
    aspect-ratio: 0.65;
    background-color: #374151;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid #FF6B00;
    transition: all 0.3s ease;
    position: relative;
    perspective: 1000px;
    transform-style: preserve-3d;
}
.persona-image-container:hover {
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(255, 107, 0, 0.3);
}
.persona-image-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 107, 0, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.persona-image-container:hover::before {
    opacity: 1;
}
.persona-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.buy-me-coffee {
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 1000;
    background-color: #FF6B00;
    color: #FFFFFF;
    padding: 10px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 2px 5px rgba(255, 107, 0, 0.2);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    animation: float 3s ease-in-out infinite;
}
.buy-me-coffee:hover {
    transform: translateY(-2px) scale(1.05);
    background-color: #FF8533;
    box-shadow: 0 4px 10px rgba(255, 107, 0, 0.3);
}
.buy-me-coffee img {
    width: 20px;
    height: 20px;
}
.btc-tip-modal {
    display: none;
    position: fixed;
    bottom: 80px;
    right: 20px;
    background-color: #1F2937;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(255, 107, 0, 0.1);
    z-index: 1001;
    border: 1px solid #FF6B00;
    max-width: 300px;
    animation: fadeIn 0.3s ease-out;
}
.btc-tip-modal.show {
    display: block;
}
.btc-tip-modal .close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    color: #FF6B00;
    cursor: pointer;
    font-size: 20px;
}
.btc-tip-modal .close-btn:hover {
    color: #FF8533;
}
.language-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background-color: #1F2937;
    border: 1px solid #FF6B00;
    border-radius: 8px;
    padding: 8px;
    display: flex;
    gap: 8px;
    animation: fadeIn 0.5s ease-out;
}
.language-btn {
    background: none;
    border: none;
    color: #F3F4F6;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s ease;
}
.language-btn:hover {
    background-color: #374151;
    transform: translateY(-2px);
}
.language-btn.active {
    background-color: #FF6B00;
    color: white;
    animation: pulse 2s infinite;
}
/* Question Animation */
#questionText {
    transition: all 0.3s ease;
}
#questionText.changing {
    animation: shake 0.5s ease;
}
/* Result Area Animations */
#resultArea {
    transition: all 0.5s ease;
}
#resultArea.showing {
    animation: fadeIn 0.5s ease-out;
}
/* Progress Indicator */
.progress-container {
    width: 100%;
    height: 4px;
    background-color: #374151;
    border-radius: 2px;
    margin: 20px 0;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background-color: #FF6B00;
    width: 0%;
    transition: width 0.3s ease;
}
/* Bitcoin Price Ticker */
.price-ticker {
    position: fixed;
    top: 20px;
    left: 20px;
    background-color: #1F2937;
    border: 1px solid #FF6B00;
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 14px;
    color: #F3F4F6;
    z-index: 1000;
    animation: fadeIn 0.5s ease-out;
}
.price-ticker.up {
    color: #10B981;
}
.price-ticker.down {
    color: #EF4444;
}
/* Animation Keyframes */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes spin-slow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.animate-float {
    animation: float 3s ease-in-out infinite;
}
.animate-spin-slow {
    animation: spin-slow 20s linear infinite;
}
.animate-bounce {
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Coffee Button Styles */
.coffee-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(45deg, #FF6B6B, #FF8E53);
    border: none;
    border-radius: 50px;
    padding: 12px 24px;
    color: white;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.coffee-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
}

.coffee-button:active {
    transform: translateY(1px);
}

.coffee-button .coffee-icon {
    font-size: 1.2em;
    animation: coffee-steam 2s infinite;
}

@keyframes coffee-steam {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-5px) rotate(5deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

.coffee-button .steam {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: steam-rise 2s infinite;
}

@keyframes steam-rise {
    0% { transform: translateY(0) scale(1); opacity: 0.6; }
    100% { transform: translateY(-20px) scale(0); opacity: 0; }
}