/* animations.css - Animation definitions and applications */

/* ===================================
   Keyframe Definitions
   =================================== */

/* Fade in with upward movement */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(1.875rem); /* 30px */
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade in with scale */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Slide in from left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-1.875rem); /* -30px */
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide in from right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(1.875rem); /* 30px */
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Subtle bounce */
@keyframes subtleBounce {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    60% {
        opacity: 1;
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

/* Rotate in */
@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-10deg) scale(0.9);
    }
    to {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

/* ===================================
   Animation Applications
   =================================== */

/* Headings - Scale animation */
.slide.active h1,
.slide.active h2 {
    animation: fadeInScale 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Subtitles - Fade up animation */
.slide.active .subtitle {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
    opacity: 0;
}

/* URLs - Fade up with delay */
.slide.active .url {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
    opacity: 0;
}

/* Author info - Fade up with more delay */
.slide.active .author {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
    opacity: 0;
}

/* Browser mockup - Fade up animation */
.slide.active .browser-mockup {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
    opacity: 0;
}

/* Code blocks - Slide in from left */
.slide.active .code-block {
    animation: slideInLeft 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
    opacity: 0;
}

/* Image containers - Scale animation */
.slide.active .image-container {
    animation: fadeInScale 1s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
    opacity: 0;
}

/* ===================================
   Special Slide Animations
   =================================== */

/* Title slide (slide-1) - Staggered animations */
.slide-1.active h1 {
    animation: fadeInScale 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.slide-1.active .author {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
    opacity: 0;
}

/* Code block lines - Staggered animation */
.slide.active .code-block div {
    animation: slideInLeft 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

.slide.active .code-block div:nth-child(1) { animation-delay: 0.4s; }
.slide.active .code-block div:nth-child(2) { animation-delay: 0.5s; }
.slide.active .code-block div:nth-child(3) { animation-delay: 0.6s; }
.slide.active .code-block div:nth-child(4) { animation-delay: 0.7s; }
.slide.active .code-block div:nth-child(5) { animation-delay: 0.8s; }
.slide.active .code-block div:nth-child(6) { animation-delay: 0.9s; }

/* ===================================
   Navigation Animations
   =================================== */

/* Position indicator fade */
.position-indicator {
    animation: fadeIn 0.5s ease-in-out;
}

/* Nav hint subtle animation */
.nav-hint {
    animation: fadeIn 1s ease-in-out 1s forwards;
    opacity: 0;
}

/* Author info animation */
.author-info {
    animation: fadeIn 1s ease-in-out 1.2s forwards;
    opacity: 0;
}

/* ===================================
   Interactive Animations
   =================================== */

/* Hover effects for links */
.author-info a {
    transition: color 0.3s ease;
}

/* Browser dots hover effect */
.browser-dots .dot {
    transition: transform 0.2s ease;
}

.browser-dots:hover .dot {
    transform: scale(1.2);
}

/* ===================================
   Page Transition Animations
   =================================== */

/* Slide exit animation (when removing active class) */
.slide.exiting {
    animation: fadeOut 0.3s ease-in-out forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: scale(0.98);
    }
}

/* ===================================
   Loading Animation (Optional)
   =================================== */

/* Initial page load animation */
@keyframes initialLoad {
    0% {
        opacity: 0;
        transform: translateY(1.25rem);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

body {
    animation: initialLoad 0.6s ease-out;
}

/* ===================================
   Reduced Motion Support
   =================================== */

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}