/**
 * Animation Styles
 * 
 * LEARN: Scroll animations and micro-interactions make your site feel polished.
 * We use CSS classes that JavaScript adds when elements enter the viewport.
 *
 * @package Codevall
 */

/* =============================================================================
 * ANIMATION BASE STATES
 * 
 * Elements with [data-animate] are hidden until JavaScript triggers them
 * ============================================================================= */
[data-animate] {
    opacity: 0;
    transition: 
        opacity var(--transition-slow),
        transform var(--transition-slow);
}

[data-animate].animate-in {
    opacity: 1;
}

/* Disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    [data-animate] {
        opacity: 1;
        transform: none !important;
        transition: none !important;
    }
}

/* =============================================================================
 * FADE ANIMATIONS
 * ============================================================================= */
[data-animate="fade"] {
    opacity: 0;
}

[data-animate="fade"].animate-in {
    opacity: 1;
}

/* =============================================================================
 * SLIDE ANIMATIONS
 * ============================================================================= */
[data-animate="slide-up"] {
    opacity: 0;
    transform: translateY(30px);
}

[data-animate="slide-up"].animate-in {
    opacity: 1;
    transform: translateY(0);
}

[data-animate="slide-down"] {
    opacity: 0;
    transform: translateY(-30px);
}

[data-animate="slide-down"].animate-in {
    opacity: 1;
    transform: translateY(0);
}

[data-animate="slide-left"] {
    opacity: 0;
    transform: translateX(30px);
}

[data-animate="slide-left"].animate-in {
    opacity: 1;
    transform: translateX(0);
}

[data-animate="slide-right"] {
    opacity: 0;
    transform: translateX(-30px);
}

[data-animate="slide-right"].animate-in {
    opacity: 1;
    transform: translateX(0);
}

/* =============================================================================
 * SCALE ANIMATIONS
 * ============================================================================= */
[data-animate="scale"] {
    opacity: 0;
    transform: scale(0.9);
}

[data-animate="scale"].animate-in {
    opacity: 1;
    transform: scale(1);
}

[data-animate="scale-up"] {
    opacity: 0;
    transform: scale(0.8) translateY(20px);
}

[data-animate="scale-up"].animate-in {
    opacity: 1;
    transform: scale(1) translateY(0);
}

/* =============================================================================
 * STAGGER DELAYS
 * For animating lists/grids with sequential timing
 * ============================================================================= */
[data-animate-delay="100"] { transition-delay: 100ms; }
[data-animate-delay="200"] { transition-delay: 200ms; }
[data-animate-delay="300"] { transition-delay: 300ms; }
[data-animate-delay="400"] { transition-delay: 400ms; }
[data-animate-delay="500"] { transition-delay: 500ms; }
[data-animate-delay="600"] { transition-delay: 600ms; }
[data-animate-delay="700"] { transition-delay: 700ms; }
[data-animate-delay="800"] { transition-delay: 800ms; }

/* =============================================================================
 * KEYFRAME ANIMATIONS
 * For continuous or repeating animations
 * ============================================================================= */

/* Floating animation - for decorative elements */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* Pulse animation - for CTAs */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Bounce animation */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
        animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }
    50% {
        transform: translateY(-25%);
        animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
}

.animate-bounce {
    animation: bounce 1s infinite;
}

/* Spin animation - for loaders */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* Shake animation - for form errors */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.animate-shake {
    animation: shake 0.5s ease-in-out;
}

/* Fade in keyframe */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fade-in {
    animation: fadeIn var(--transition-normal) ease forwards;
}

/* Slide up keyframe */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-up {
    animation: slideUp var(--transition-normal) ease forwards;
}

/* =============================================================================
 * SKELETON LOADING ANIMATION
 * For loading states
 * ============================================================================= */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-background-alt) 25%,
        var(--color-border-light) 50%,
        var(--color-background-alt) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

/* =============================================================================
 * HOVER TRANSITIONS
 * Smooth transitions for interactive elements
 * ============================================================================= */
.hover-lift {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: transform var(--transition-fast);
}

.hover-scale:hover {
    transform: scale(1.02);
}

.hover-glow {
    transition: box-shadow var(--transition-fast);
}

.hover-glow:hover {
    box-shadow: var(--shadow-primary);
}

/* =============================================================================
 * SCROLL PROGRESS INDICATOR
 * ============================================================================= */
.scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    z-index: var(--z-10); /* Lower than dropdown (--z-dropdown: 100) so it doesn't cover nav menus */
    transition: width 0.1s linear;
    pointer-events: none; /* Don't block clicks */
}

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

/* Animated underline for links */
.animated-underline {
    position: relative;
    text-decoration: none;
}

.animated-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-fast), left var(--transition-fast);
}

.animated-underline:hover::after {
    width: 100%;
    left: 0;
}

/* Image lazy load fade-in */
img.lazy-fade {
    opacity: 0;
    transition: opacity var(--transition-normal);
}

img.lazy-fade.is-loaded {
    opacity: 1;
}

/* Form field focus animations */
.form-field {
    position: relative;
}

.form-field.is-focused label,
.form-field.has-value label {
    color: var(--color-primary);
}

.form-field.is-focused input,
.form-field.is-focused textarea,
.form-field.is-focused select {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Enhanced input focus ring */
input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

/* Back to top button animations */
[data-back-to-top] {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity var(--transition-fast), 
                visibility var(--transition-fast), 
                transform var(--transition-fast),
                background-color var(--transition-fast);
    z-index: var(--z-fixed);
    cursor: pointer;
    border: none;
}

[data-back-to-top]:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
}

[data-back-to-top].is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Text gradient */
.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Loading spinner */
.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Success checkmark animation */
@keyframes checkmark {
    0% {
        stroke-dashoffset: 50;
    }
    100% {
        stroke-dashoffset: 0;
    }
}

.success-checkmark {
    width: 48px;
    height: 48px;
}

.success-checkmark .checkmark-circle {
    fill: none;
    stroke: var(--color-success);
    stroke-width: 2;
    stroke-miterlimit: 10;
}

.success-checkmark .checkmark-check {
    fill: none;
    stroke: var(--color-success);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 50;
    stroke-dashoffset: 50;
    animation: checkmark 0.5s ease-in-out forwards;
    animation-delay: 0.2s;
}