/* ============================================
   FRAME X FRAME — Animation Library
   Cinematic, intentional motion
   ============================================ */

/* ---- Scroll-triggered Reveal Animations ---- */

/* Base hidden state for reveal elements */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity var(--duration-slow) var(--ease-out),
        transform var(--duration-slow) var(--ease-out);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children */
[data-reveal-stagger]>* {
    opacity: 0;
    transform: translateY(20px);
    transition:
        opacity var(--duration-slow) var(--ease-out),
        transform var(--duration-slow) var(--ease-out);
}

[data-reveal-stagger].revealed>*:nth-child(1) {
    transition-delay: 0s;
}

[data-reveal-stagger].revealed>*:nth-child(2) {
    transition-delay: 0.1s;
}

[data-reveal-stagger].revealed>*:nth-child(3) {
    transition-delay: 0.2s;
}

[data-reveal-stagger].revealed>*:nth-child(4) {
    transition-delay: 0.3s;
}

[data-reveal-stagger].revealed>*:nth-child(5) {
    transition-delay: 0.4s;
}

[data-reveal-stagger].revealed>*:nth-child(6) {
    transition-delay: 0.5s;
}

[data-reveal-stagger].revealed>* {
    opacity: 1;
    transform: translateY(0);
}

/* Fade only (no translate) */
[data-reveal="fade"] {
    transform: none;
}

/* Slide from left */
[data-reveal="slide-left"] {
    transform: translateX(-30px);
}

[data-reveal="slide-left"].revealed {
    transform: translateX(0);
}

/* Slide from right */
[data-reveal="slide-right"] {
    transform: translateX(30px);
}

[data-reveal="slide-right"].revealed {
    transform: translateX(0);
}

/* Scale up */
[data-reveal="scale"] {
    transform: scale(0.95);
}

[data-reveal="scale"].revealed {
    transform: scale(1);
}

/* ---- Parallax ---- */
[data-parallax] {
    will-change: transform;
}

/* ---- Link Underline Animation ---- */
.link-underline {
    position: relative;
    text-decoration: none;
}

.link-underline::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: width var(--duration-normal) var(--ease-out);
}

.link-underline:hover::after {
    width: 100%;
}

/* ---- Button Slide Animation ---- */
.btn {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--color-primary);
    transition: width var(--duration-normal) var(--ease-out);
    z-index: -1;
}

.btn:hover::before {
    width: 100%;
}

.btn--filled::before {
    background-color: var(--color-primary-dark);
}

/* ---- Image Hover Effects ---- */
.img-hover-zoom {
    overflow: hidden;
}

.img-hover-zoom img {
    transition: transform var(--duration-slow) var(--ease-out);
}

.img-hover-zoom:hover img {
    transform: scale(1.03);
}

/* Desaturate effect */
.img-hover-saturate img {
    filter: grayscale(30%);
    transition: filter var(--duration-normal) var(--ease-out);
}

.img-hover-saturate:hover img {
    filter: grayscale(0%);
}

/* ---- Scroll Progress Bar ---- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-primary);
    z-index: var(--z-nav);
    transition: width 0.1s linear;
}

/* ---- Form Input Animation ---- */
.input-animated {
    position: relative;
}

.input-animated input,
.input-animated textarea {
    border: none;
    border-bottom: 1px solid var(--color-text-muted);
    transition: border-color var(--duration-fast) var(--ease-out);
}

.input-animated::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--duration-normal) var(--ease-out);
}

.input-animated:focus-within::after {
    width: 100%;
}

/* ---- Hero Text Split Animation ---- */
.hero-text-split {
    overflow: hidden;
}

.hero-text-split .line {
    display: block;
    transform: translateY(100%);
    animation: slideUp var(--duration-slower) var(--ease-out) forwards;
}

.hero-text-split .line:nth-child(2) {
    animation-delay: 0.15s;
}

.hero-text-split .line:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes slideUp {
    to {
        transform: translateY(0);
    }
}

/* ---- Fade In Keyframe ---- */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ---- Gentle Float ---- */
@keyframes gentleFloat {

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

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

.animate-float {
    animation: gentleFloat 4s var(--ease-in-out) infinite;
}

/* ---- Scroll Indicator Bounce ---- */
@keyframes scrollBounce {

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

    50% {
        transform: translateY(8px);
        opacity: 0.6;
    }
}

.scroll-indicator {
    animation: scrollBounce 2s var(--ease-in-out) infinite;
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {

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

    [data-reveal],
    [data-reveal-stagger]>* {
        opacity: 1;
        transform: none;
    }
}