/* ============================================
   ANIMATIONS - Smooth Transitions & Effects
   ============================================ */

/* ============================================
   KEYFRAME ANIMATIONS
   ============================================ */

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

@keyframes pulse {
    0%, 100% {
        opacity: 0.6;
        box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
    }
    50% {
        opacity: 1;
        box-shadow: 0 0 20px rgba(0, 255, 136, 0.8);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInDown {
    from {
        transform: translateY(-30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes glowPulse {
    0%, 100% {
        text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
    }
    50% {
        text-shadow: 0 0 20px rgba(0, 255, 136, 0.8),
                     0 0 30px rgba(0, 136, 255, 0.5);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes neon-flicker {
    0% {
        text-shadow: 0 0 10px rgba(0, 255, 136, 0.8),
                     0 0 20px rgba(0, 255, 136, 0.6),
                     0 0 30px rgba(0, 255, 136, 0.4);
    }
    5% {
        text-shadow: none;
    }
    10% {
        text-shadow: 0 0 10px rgba(0, 255, 136, 0.8),
                     0 0 20px rgba(0, 255, 136, 0.6),
                     0 0 30px rgba(0, 255, 136, 0.4);
    }
    15% {
        text-shadow: none;
    }
    20% {
        text-shadow: 0 0 10px rgba(0, 255, 136, 0.8),
                     0 0 20px rgba(0, 255, 136, 0.6),
                     0 0 30px rgba(0, 255, 136, 0.4);
    }
    100% {
        text-shadow: 0 0 10px rgba(0, 255, 136, 0.8),
                     0 0 20px rgba(0, 255, 136, 0.6),
                     0 0 30px rgba(0, 255, 136, 0.4);
    }
}

@keyframes colorShift {
    0% {
        filter: hue-rotate(0deg);
    }
    50% {
        filter: hue-rotate(30deg);
    }
    100% {
        filter: hue-rotate(0deg);
    }
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    70% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes rotateInY {
    from {
        transform: perspective(400px) rotateY(90deg);
        opacity: 0;
    }
    to {
        transform: perspective(400px) rotateY(0deg);
        opacity: 1;
    }
}

/* ============================================
   APPLY ANIMATIONS
   ============================================ */

/* Page Load Animation */
body {
    animation: fadeIn 600ms ease-out;
}

.header-banner {
    animation: slideInDown 500ms ease-out;
}

.container {
    animation: slideInUp 600ms ease-out;
}

/* QR Display Animation */
#qrDisplay {
    animation: scaleIn 400ms ease-out;
}

.qr-display-wrapper.generating {
    animation: pulse 1s ease-in-out;
}

/* Button Hover Effects - Ripple */
.primary-btn::before,
.action-btn::before,
.share-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
}

.primary-btn:active::before,
.action-btn:active:not(:disabled)::before,
.share-btn:active:not(:disabled)::before {
    animation: ripple 600ms ease-out;
}

/* Tab Button Animation */
.tab-btn {
    position: relative;
    overflow: hidden;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.tab-btn:hover::after,
.tab-btn.active::after {
    width: 100%;
}

/* History Item Animation */
.history-item {
    animation: slideInUp 400ms ease-out;
    animation-fill-mode: both;
}

.history-item:nth-child(1) { animation-delay: 0ms; }
.history-item:nth-child(2) { animation-delay: 50ms; }
.history-item:nth-child(3) { animation-delay: 100ms; }
.history-item:nth-child(4) { animation-delay: 150ms; }
.history-item:nth-child(5) { animation-delay: 200ms; }
.history-item:nth-child(n+6) { animation-delay: 250ms; }

/* QR Generation Animation */
.qr-generating {
    animation: colorShift 1s ease-in-out;
}

/* Input Focus Animation */
input[type="text"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
textarea:focus {
    animation: slideInDown 300ms ease-out;
}

/* Notification Animation */
.notification {
    animation: slideIn var(--transition-normal) ease-out forwards;
}

.notification.removing {
    animation: slideOut var(--transition-normal) ease-in forwards;
}

/* Control Section Animation */
.control-section {
    animation: fadeIn 400ms ease-out;
}

.control-section:nth-child(1) { animation-delay: 0ms; }
.control-section:nth-child(2) { animation-delay: 50ms; }
.control-section:nth-child(3) { animation-delay: 100ms; }
.control-section:nth-child(4) { animation-delay: 150ms; }
.control-section:nth-child(5) { animation-delay: 200ms; }
.control-section:nth-child(6) { animation-delay: 250ms; }

/* Hover Scale Animation */
.action-btn:not(:disabled):hover,
.history-item:hover,
.share-btn:not(:disabled):hover {
    animation: none;
}

/* Loading Spinner Animation */
@keyframes spin-loader {
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin-loader 1s linear infinite;
}

/* Theme Toggle Animation */
.theme-toggle:active {
    animation: rotateInY 400ms ease-out;
}

/* ============================================
   MICRO-INTERACTIONS
   ============================================ */

/* Button Press Animation */
button:active:not(:disabled) {
    transform: scale(0.95);
}

/* Smooth Color Transitions */
input[type="color"] {
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

/* Smooth Text Transitions */
.text-primary,
.text-secondary {
    transition: color var(--transition-normal);
}

/* Glow Effect Animation */
.glow-effect {
    animation: glowPulse 2s ease-in-out infinite;
}

/* ============================================
   DISABLED STATE ANIMATIONS
   ============================================ */

button:disabled {
    animation: none;
}

/* ============================================
   DARK TO LIGHT MODE TRANSITION
   ============================================ */

body.light-mode {
    animation: fadeIn 300ms ease-out;
}

body.light-mode input[type="text"],
body.light-mode input[type="email"],
body.light-mode input[type="url"],
body.light-mode input[type="tel"],
body.light-mode textarea {
    animation: fadeIn 300ms ease-out;
}

/* ============================================
   RESPONSIVE ANIMATION ADJUSTMENTS
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   LOADING ANIMATION
   ============================================ */

.qr-loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin-loader 1s linear infinite;
}

/* ============================================
   SUCCESS ANIMATION
   ============================================ */

@keyframes checkmark {
    0% {
        stroke-dasharray: 0 100;
    }
    100% {
        stroke-dasharray: 100 0;
    }
}

.success-icon {
    stroke-dasharray: 100;
    animation: checkmark 600ms ease-out forwards;
}