/* ==========================================================================
   songzejiancai.com — Animations Library
   Rich computer-science inspired motion design
   ========================================================================== */

/* ----- Scroll-Triggered Animations ----- */
[data-animate] {
    opacity: 0;
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
    will-change: opacity, transform;
}

[data-animate="fade-up"] {
    transform: translateY(40px);
}
[data-animate="fade-down"] {
    transform: translateY(-40px);
}
[data-animate="fade-left"] {
    transform: translateX(40px);
}
[data-animate="fade-right"] {
    transform: translateX(-40px);
}
[data-animate="fade-in"] {
    transform: scale(0.95);
}
[data-animate="scale-in"] {
    transform: scale(0.9);
}

[data-animate].is-visible {
    opacity: 1;
    transform: translate(0, 0) scale(1);
}

/* ----- Stagger delays ----- */
[data-animate][data-delay="50"].is-visible { transition-delay: 50ms; }
[data-animate][data-delay="100"].is-visible { transition-delay: 100ms; }
[data-animate][data-delay="150"].is-visible { transition-delay: 150ms; }
[data-animate][data-delay="200"].is-visible { transition-delay: 200ms; }
[data-animate][data-delay="250"].is-visible { transition-delay: 250ms; }
[data-animate][data-delay="300"].is-visible { transition-delay: 300ms; }
[data-animate][data-delay="350"].is-visible { transition-delay: 350ms; }
[data-animate][data-delay="400"].is-visible { transition-delay: 400ms; }
[data-animate][data-delay="450"].is-visible { transition-delay: 450ms; }
[data-animate][data-delay="500"].is-visible { transition-delay: 500ms; }

/* ----- Hero Title Reveal ----- */
.hero .title-line {
    transform: translateY(110%);
    animation: reveal-line 1s var(--ease-out) forwards;
}
.hero .title-line:nth-child(1) { animation-delay: 0.1s; }
.hero .title-line:nth-child(2) { animation-delay: 0.25s; }
.hero .title-line:nth-child(3) { animation-delay: 0.4s; }

@keyframes reveal-line {
    from { transform: translateY(110%); }
    to { transform: translateY(0); }
}

/* ----- Glitch Effect (Computer-Science Aesthetic) ----- */
@keyframes glitch {
    0%, 100% { transform: translate(0); }
    10% { transform: translate(-2px, 2px); }
    20% { transform: translate(-2px, -2px); }
    30% { transform: translate(2px, 2px); }
    40% { transform: translate(2px, -2px); }
    50% { transform: translate(-1px, 1px); }
    60% { transform: translate(1px, -1px); }
    70% { transform: translate(-1px, -1px); }
    80% { transform: translate(1px, 1px); }
    90% { transform: translate(-1px, 2px); }
}

.glitch-hover:hover {
    animation: glitch 0.6s ease-in-out;
}

/* ----- Scan Line (CRT Effect) ----- */
.scanlines {
    position: relative;
    overflow: hidden;
}

.scanlines::after {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        rgba(255, 255, 255, 0) 0px,
        rgba(255, 255, 255, 0) 2px,
        rgba(0, 229, 255, 0.02) 3px,
        rgba(0, 229, 255, 0.02) 4px
    );
    pointer-events: none;
    z-index: 1;
}

/* ----- Code Rain Effect ----- */
@keyframes code-rain {
    0% { transform: translateY(-100%); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(100vh); opacity: 0; }
}

/* ----- Tilt on Hover (3D card) ----- */
.tilt-card {
    transform-style: preserve-3d;
    transition: transform 0.4s var(--ease-out);
}

/* ----- Type Writer ----- */
@keyframes typewriter {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-text {
    50% { border-color: transparent; }
}

.typewriter {
    display: inline-block;
    overflow: hidden;
    white-space: nowrap;
    border-right: 2px solid var(--c-cyan);
    animation: typewriter 3s steps(40) 1s forwards, blink-text 0.7s infinite;
}

/* ----- Floating Animation ----- */
@keyframes float-soft {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.float { animation: float-soft 6s ease-in-out infinite; }
.float-2 { animation: float-soft 8s ease-in-out infinite 0.5s; }
.float-3 { animation: float-soft 7s ease-in-out infinite 1s; }

/* ----- Glow Pulse ----- */
@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 229, 255, 0.3); }
    50% { box-shadow: 0 0 40px rgba(0, 229, 255, 0.6); }
}

.glow-pulse { animation: glow-pulse 3s ease-in-out infinite; }

/* ----- Text Glitch (data-text) ----- */
.glitch-text {
    position: relative;
    display: inline-block;
}

.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    inset: 0;
    overflow: hidden;
    clip-path: inset(0 0 0 0);
}

.glitch-text::before {
    color: var(--c-cyan);
    transform: translateX(-2px);
    animation: glitch-text-1 3s infinite linear alternate-reverse;
}

.glitch-text::after {
    color: var(--c-pink);
    transform: translateX(2px);
    animation: glitch-text-2 3s infinite linear alternate-reverse;
}

@keyframes glitch-text-1 {
    0%, 100% { clip-path: inset(0 0 90% 0); }
    20% { clip-path: inset(20% 0 60% 0); }
    40% { clip-path: inset(50% 0 30% 0); }
    60% { clip-path: inset(70% 0 10% 0); }
    80% { clip-path: inset(40% 0 40% 0); }
}

@keyframes glitch-text-2 {
    0%, 100% { clip-path: inset(90% 0 0 0); }
    20% { clip-path: inset(60% 0 20% 0); }
    40% { clip-path: inset(30% 0 50% 0); }
    60% { clip-path: inset(10% 0 70% 0); }
    80% { clip-path: inset(40% 0 40% 0); }
}

/* ----- Counter Pulse ----- */
@keyframes counter-pulse {
    0%, 100% { color: var(--text-0); }
    50% { color: var(--c-cyan); text-shadow: 0 0 20px rgba(0, 229, 255, 0.5); }
}

.counter-active { animation: counter-pulse 0.5s ease-out; }

/* ----- Shake ----- */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.shake { animation: shake 0.4s ease-in-out; }

/* ----- Slide In From Edge ----- */
@keyframes slide-in-right {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slide-in-left {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slide-in-bottom {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.slide-in-right { animation: slide-in-right 0.6s var(--ease-out); }
.slide-in-left { animation: slide-in-left 0.6s var(--ease-out); }
.slide-in-bottom { animation: slide-in-bottom 0.6s var(--ease-out); }

/* ----- Morphing Blob ----- */
@keyframes morph-blob {
    0%, 100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
        transform: rotate(0deg);
    }
    33% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
        transform: rotate(120deg);
    }
    66% {
        border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%;
        transform: rotate(240deg);
    }
}

.morph-blob {
    animation: morph-blob 12s ease-in-out infinite;
}

/* ----- Loading Bars ----- */
@keyframes load-bar {
    0% { width: 0%; }
    50% { width: 80%; }
    100% { width: 100%; }
}

/* ----- Hover lift variations ----- */
.hover-lift {
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}
.hover-lift:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* ----- Animated border ----- */
@keyframes border-flow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.animated-border {
    position: relative;
    background: var(--bg-1);
    z-index: 0;
}

.animated-border::before {
    content: "";
    position: absolute;
    inset: -2px;
    background: linear-gradient(90deg, var(--c-cyan), var(--c-violet), var(--c-pink), var(--c-cyan));
    background-size: 200% 100%;
    border-radius: inherit;
    z-index: -1;
    animation: border-flow 4s linear infinite;
    opacity: 0;
    transition: opacity 0.4s var(--ease-out);
}

.animated-border:hover::before { opacity: 1; }

/* ----- Page transition ----- */
.page-transition {
    animation: page-fade 0.6s var(--ease-out);
}

@keyframes page-fade {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ----- Hexagon pulse ----- */
@keyframes hex-pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* ----- Wave ----- */
@keyframes wave {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ----- Tilt on mouse move ----- */
.tilt-on-hover {
    transition: transform 0.4s var(--ease-out);
}

/* ----- Page-Specific Animations ----- */
/* Marquee glow */
.marquee-track span:hover {
    color: var(--c-cyan);
    text-shadow: 0 0 20px var(--c-cyan);
}

/* Nav link animated underline */
.nav-link::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--c-cyan);
    transition: all 0.4s var(--ease-out);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* Button shine */
@keyframes shine {
    0% { transform: translateX(-100%) skewX(-15deg); }
    100% { transform: translateX(200%) skewX(-15deg); }
}

.btn-primary::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 30%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: translateX(-100%) skewX(-15deg);
    z-index: 2;
}

.btn-primary:hover::after {
    animation: shine 0.8s ease-out;
}

/* Image grid fade-in */
@keyframes img-fade {
    from { opacity: 0; transform: scale(1.05); }
    to { opacity: 1; transform: scale(1); }
}

/* Form input focus */
.form-input:focus {
    animation: input-pulse 1s ease-out;
}

@keyframes input-pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.4); }
    100% { box-shadow: 0 0 0 12px rgba(0, 229, 255, 0); }
}

/* Number ticker */
.number-ticker {
    display: inline-block;
    transition: transform 0.4s var(--ease-bounce);
}

.number-ticker.bump {
    animation: number-bump 0.6s var(--ease-bounce);
}

@keyframes number-bump {
    0% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-10px) scale(1.2); color: var(--c-cyan); }
    100% { transform: translateY(0) scale(1); }
}

/* Sub-section reveal */
.reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}