[data-animate] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
    will-change: opacity, transform;
}

[data-animate].in-view {
    opacity: 1;
    transform: translateY(0);
}

.features-grid [data-animate]:nth-child(1) { transition-delay: 0s; }
.features-grid [data-animate]:nth-child(2) { transition-delay: 0.08s; }
.features-grid [data-animate]:nth-child(3) { transition-delay: 0.16s; }
.features-grid [data-animate]:nth-child(4) { transition-delay: 0.24s; }
.features-grid [data-animate]:nth-child(5) { transition-delay: 0.32s; }
.features-grid [data-animate]:nth-child(6) { transition-delay: 0.4s; }
.features-grid [data-animate]:nth-child(7) { transition-delay: 0.48s; }
.features-grid [data-animate]:nth-child(8) { transition-delay: 0.56s; }
.features-grid [data-animate]:nth-child(9) { transition-delay: 0.64s; }

.journey-grid [data-animate]:nth-child(1) { transition-delay: 0s; }
.journey-grid [data-animate]:nth-child(2) { transition-delay: 0.08s; }
.journey-grid [data-animate]:nth-child(3) { transition-delay: 0.16s; }
.journey-grid [data-animate]:nth-child(4) { transition-delay: 0.24s; }
.journey-grid [data-animate]:nth-child(5) { transition-delay: 0.32s; }
.journey-grid [data-animate]:nth-child(6) { transition-delay: 0.4s; }
.journey-grid [data-animate]:nth-child(7) { transition-delay: 0.48s; }
.journey-grid [data-animate]:nth-child(8) { transition-delay: 0.56s; }

.experience-grid [data-animate]:nth-child(1) { transition-delay: 0s; }
.experience-grid [data-animate]:nth-child(2) { transition-delay: 0.08s; }
.experience-grid [data-animate]:nth-child(3) { transition-delay: 0.16s; }
.experience-grid [data-animate]:nth-child(4) { transition-delay: 0.24s; }
.experience-grid [data-animate]:nth-child(5) { transition-delay: 0.32s; }
.experience-grid [data-animate]:nth-child(6) { transition-delay: 0.4s; }

.about-cards-grid [data-animate]:nth-child(1) { transition-delay: 0s; }
.about-cards-grid [data-animate]:nth-child(2) { transition-delay: 0.1s; }
.about-cards-grid [data-animate]:nth-child(3) { transition-delay: 0.2s; }

.hero-image {
    will-change: transform;
}

/* ==========================================================================
   PAGE TRANSITIONS (fade in/out between pages)
   ========================================================================== */
body {
    opacity: 0;
    /* Fallback: if page-transitions.js is slow or fails to load, the page
       still shows itself after 3 seconds instead of staying blank. */
    animation: pageRevealFallback 0.2s ease 3s forwards;
}

@keyframes pageRevealFallback {
    to { opacity: 1; }
}

body.page-fade-in {
    opacity: 1;
    transition: opacity 0.2s ease;
    animation: none;
}

body.page-fade-out {
    opacity: 0;
    transition: opacity 0.2s ease;
    animation: none;
}

/* ==========================================================================
   feat/login-animations: SNAKE-THEMED LOGIN / SIGN-UP ANIMATIONS
   --------------------------------------------------------------------------
   Everything here is scoped to login-page classes (.auth-card, .auth-toggle,
   .input-group, .btn-login, ...) so the landing page that also loads this
   file is not affected. Turned into simple fades for people who have
   "reduce motion" on (see the @media block at the end).
   ========================================================================== */

/* --- 1. Card entrance ---------------------------------------------------- */
.auth-card {
    position: relative;
    animation: authCardIn 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s both;
}

@keyframes authCardIn {
    from { opacity: 0; transform: translateY(18px) scale(0.98); }
    to   { opacity: 1; transform: none; }
}

/* --- 2. Snake border trace (once, on page load - started by script.js) --- */
.snake-trace {
    position: absolute;
    inset: -4px;
    width: calc(100% + 8px);
    height: calc(100% + 8px);
    overflow: visible;
    pointer-events: none;
}

.snake-trace rect {
    fill: none;
    stroke: url(#snake-trace-gradient);
    stroke-width: 3.5;
    stroke-linecap: round;
    stroke-dasharray: 20 80;
    stroke-dashoffset: 100;
    opacity: 0;
}

.snake-trace.is-running rect {
    animation: authSnakeCoil 1.6s cubic-bezier(0.55, 0.1, 0.35, 1) 0.35s forwards;
}

@keyframes authSnakeCoil {
    0%   { opacity: 1;   stroke-dashoffset: 100; stroke-dasharray: 20 80; }
    78%  { opacity: 1;   stroke-dashoffset: 0;   stroke-dasharray: 20 80; }
    90%  { opacity: 0.9; stroke-dasharray: 100 0; }
    100% { opacity: 0;   stroke-dasharray: 100 0; }
}

/* --- 3. Panel switch: fields glide in one after another, then stop -------
   script.js showPanel() adds .panel-animate-in (and .panel-from-left for
   Back). Containers (forms, verification/success wrappers) don't animate
   themselves - their children do, so nothing animates twice. */
.panel-animate-in > :not(.auth-form):not(.verification-container):not(.success-container),
.panel-animate-in .auth-form > *,
.panel-animate-in .verification-container > :not(.auth-form),
.panel-animate-in .success-container > * {
    animation: authGlideFromRight 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.panel-animate-in.panel-from-left > :not(.auth-form):not(.verification-container):not(.success-container),
.panel-animate-in.panel-from-left .auth-form > *,
.panel-animate-in.panel-from-left .verification-container > :not(.auth-form),
.panel-animate-in.panel-from-left .success-container > * {
    animation-name: authGlideFromLeft;
}

/* Stagger: the "snake" flow - each row starts a little after the last */
.panel-animate-in .auth-form > :nth-child(1),
.panel-animate-in .verification-container > :nth-child(1),
.panel-animate-in .success-container > :nth-child(1) { animation-delay: 0.07s; }
.panel-animate-in .auth-form > :nth-child(2),
.panel-animate-in .verification-container > :nth-child(2),
.panel-animate-in .success-container > :nth-child(2) { animation-delay: 0.14s; }
.panel-animate-in .auth-form > :nth-child(3),
.panel-animate-in .verification-container > :nth-child(3),
.panel-animate-in .success-container > :nth-child(3) { animation-delay: 0.21s; }
.panel-animate-in .auth-form > :nth-child(4),
.panel-animate-in .verification-container > :nth-child(4) { animation-delay: 0.28s; }
.panel-animate-in .auth-form > :nth-child(5),
.panel-animate-in .verification-container > :nth-child(5) { animation-delay: 0.35s; }
.panel-animate-in .auth-form > :nth-child(n+6),
.panel-animate-in .verification-container > :nth-child(n+6) { animation-delay: 0.42s; }

@keyframes authGlideFromRight {
    from { opacity: 0; transform: translateX(28px); }
    to   { opacity: 1; transform: none; }
}

@keyframes authGlideFromLeft {
    from { opacity: 0; transform: translateX(-28px); }
    to   { opacity: 1; transform: none; }
}

/* --- 4. Stretchy Sign In / Sign Up pill ----------------------------------
   Uses the separate `scale` property so it doesn't fight the existing
   transform: translateX(100%) that moves the pill. */
.toggle-slider.is-stretching {
    animation: authPillStretch 0.35s ease;
}

@keyframes authPillStretch {
    0%   { scale: 1 1; }
    45%  { scale: 1.3 1; }
    100% { scale: 1 1; }
}

/* --- 5. Focus underline that slithers across the input -------------------
   Drawn with a background gradient, so no extra HTML wrapper is needed.
   The input keeps its #EDEAE4 background color from style.css. */
.input-group input {
    background-image: linear-gradient(90deg, #00D0FF 0%, #1CE8C8 50%, #38FF92 100%);
    background-repeat: no-repeat;
    background-position: left bottom;
    background-size: 0% 3px;
    transition: background-size 0.45s cubic-bezier(0.65, 0, 0.35, 1);
}

.input-group input:focus {
    background-size: 100% 3px;
}

/* --- 6. Error: calm red outline (no shaking) + fade-in messages --------- */
.input-group input.auth-input-error {
    box-shadow: inset 0 0 0 1.5px rgba(224, 36, 36, 0.7);
    animation: authErrorGlow 1.2s ease;
}

@keyframes authErrorGlow {
    0%   { box-shadow: inset 0 0 0 1.5px rgba(224, 36, 36, 0),   0 0 0 0   rgba(224, 36, 36, 0); }
    25%  { box-shadow: inset 0 0 0 1.5px rgba(224, 36, 36, 1),   0 0 0 4px rgba(224, 36, 36, 0.15); }
    100% { box-shadow: inset 0 0 0 1.5px rgba(224, 36, 36, 0.7), 0 0 0 0   rgba(224, 36, 36, 0); }
}

.js-error-message,
.auth-signup-hint {
    animation: authFadeIn 0.3s ease both;
}

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

/* --- 7. Buttons: scale shimmer on hover, squash on press ----------------- */
.btn-login {
    position: relative;
    overflow: hidden;
}

.btn-login::after {
    content: "";
    position: absolute;
    top: 0;
    left: -60%;
    width: 40%;
    height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.55), transparent);
    transform: skewX(-20deg);
    pointer-events: none;
}

.btn-login:hover:not(:disabled)::after {
    animation: authScaleShimmer 0.9s ease;
}

@keyframes authScaleShimmer {
    to { left: 130%; }
}

.btn-login:active:not(:disabled) {
    transform: scale(0.97, 0.94);
}

/* --- 8. Ouroboros loader: restyles setButtonLoading()'s .btn-spinner ------
   A snake chasing its tail - the ring is the body, ::after is the head. */
.btn-spinner {
    position: relative;
    border-color: rgba(255, 255, 255, 0.35);
    border-top-color: #FFFFFF;
    border-right-color: #FFFFFF;
    animation-duration: 0.8s;
}

.btn-spinner::after {
    content: "";
    position: absolute;
    top: 8.5px;
    left: 8.5px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #FFFFFF;
}

/* --- 9. Coiling success check ("Sign In Successful!") -------------------
   Plays whenever the success panel is shown. */
.signin-success-icon .success-coil {
    stroke-dasharray: 63;
    stroke-dashoffset: 63;
    transform: rotate(-90deg);
    transform-origin: 12px 12px;
    animation: authDraw 0.7s ease 0.15s forwards;
}

.signin-success-icon .success-check {
    stroke-dasharray: 14;
    stroke-dashoffset: 14;
    animation: authDraw 0.35s ease-out 0.8s forwards;
}

@keyframes authDraw {
    to { stroke-dashoffset: 0; }
}

/* --- Reduce motion: keep only simple fades ------------------------------- */
@media (prefers-reduced-motion: reduce) {
    .auth-card,
    .panel-animate-in > *,
    .panel-animate-in .auth-form > *,
    .panel-animate-in .verification-container > :not(.auth-form),
    .panel-animate-in .success-container > * {
        animation: authFadeIn 0.2s ease both !important;
    }

    .snake-trace,
    .btn-login::after,
    .btn-spinner::after {
        display: none;
    }

    .toggle-slider.is-stretching,
    .input-group input.auth-input-error {
        animation: none;
    }

    .input-group input {
        transition: none;
    }

    .btn-login:active:not(:disabled) {
        transform: none;
    }

    .signin-success-icon .success-coil,
    .signin-success-icon .success-check {
        animation: none;
        stroke-dashoffset: 0;
    }
}