.btn {
    padding: 0.5rem 2rem;
    cursor: pointer;
    transition: all 0.25s ease-in-out;
    border-style: none;
    border: solid 1px #efefef;
    color: #efefef;
    background: #111;
    margin: 1rem auto;
    text-align: center;
    text-decoration: none;
    display: block;
}

.header--landing-page {
    margin-bottom: -3rem;
    background: transparent;
    border-bottom-color: transparent;
    transition: all 0.25s ease-in-out;
}
.header--landing-page-opaque {
    background: #111;
    border-bottom-color: #666;
}

.btn--wide {
    width: 100%;
}

.btn:hover {
    color: #111;
    background: #efefef;
    border: solid 1px #111;
}

.hero-section {
    height: 100vh;
    position: relative;
    flex-shrink: 0;
}

.hero-section__subheader {
    margin-left: 4rem;
    min-width: 25rem;
}

.hero-section__main-title {
    mix-blend-mode: exclusion;
    flex-grow: 1;
    font-size: 8vw;
}

.hero-section__subtitle {
    font-size: 1.5vw;
    max-width: 25vw;
}

.hero-section__learnmore {
    margin: 1rem 0.5rem;
    font-size: 1vw;
    padding: 0.5vw 2vw;
}

.hero-section--blurb {
    height: 66vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url("/images/neuron-render-01-blur.png") center / cover no-repeat;
    border-bottom: solid 1px #aaa;
    min-height: 25rem;
    border-top: solid 0.25rem #ddd;
    box-shadow: inset 0 0.25rem 0.25rem rgba(0,0,0,0.3);
}

.hero-section--intro {
    height: 200vh;
    min-height:90rem;
    display: flex;
    flex-direction: column;
}
.hero-section__hero-features {
    flex-grow: 1;
}

.hero-section__content {
    max-width: 800px;
}

.hero-section__content--title {
    position: absolute;
    top: 0;
    bottom:0;
    left: 0;
    right: 0;
    color: #fff;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: unset;
}

.grande-title {
    padding: 0;
}
.grande-title__text {
    display: flex;
    align-items: center;
}

.grande-title__canvas {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-features {
    padding: unset !important;
    max-width: unset !important;
    margin: unset !important;
    display: flex;
    flex-direction: column;
    height: calc(100% - 4rem);
}
.hero-features__row {
    overflow: hidden;
    background: #111;
    flex-grow: 1;
    border-bottom: solid 1px #666;
}
.hero-features__row--dark {
    background: #1a1a1f;
}
.hero-features__row--mid {
    background: #282828;
}
.hero-features__row--bright {
    background: #ddd;
}

.hero-features__column {
    margin: 0 auto;
    max-width: 90rem;
    display: flex;
    flex-direction: row;
    height: 100%;
}
.hero-features__item {
    display: flex;
    width: 100%;
    flex-grow: 1;
    overflow: hidden;
    /*
    flex-basis: 50%;
    */
}

.hero-features__item--text {
    align-items: center;
    justify-content: flex-end;
}
.hero-features__row:nth-of-type(even) .hero-features__item--text {
    justify-content: flex-start;
}

.hero-features__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero-features__text {
    color: #efefef;
    max-width: 400px;
    margin: 1rem;
    line-height: 1.5rem;
    padding: 1rem;
}
.hero-features__link {
    color: #fff;
}

.hero-features__row--bright .hero-features__text {
    color: #111;
}

.hero-features__row--bright .hero-features__link {
    color: #111;
}
.hero-features__image--scale-down {
    object-fit: scale-down;
}
.hero-features__image--pos-left {
    object-position: left;
}
.hero-features__row:nth-of-type(odd) > .hero-features__column {
    flex-direction: row-reverse;
}

.hero-blurb {
    max-width: 500px !important;
    padding: 2rem 4rem !important;
    margin: unset !important;
    background: rgba(255,255,255,0.8);
    border: solid 2px #aaa;
    box-shadow: 0.2rem 1rem 1rem rgba(0, 0, 0, 0.2);
    border-radius: 3rem;
}

.hero-blurb__title {
    margin: 1rem;
    padding: 0 0 0.5rem;
    border-bottom: solid 1px #888;
}

.hero-blurb__text {
    margin: 1rem;
    line-height: 1.5rem;
}

.donate {
   height: 30rem;
   background: url("/images/donate.svg") center -2rem / 350px no-repeat, #222;
   display: flex;
   align-items: center;
   justify-content: flex-end;
   flex-direction: column;
}

@keyframes heartbeat {
  0%   { background-size: 350px auto; }
  50%  { 
      background-size: calc(350px + 2rem) auto; 
      background-position: center -3.2rem; 
    }
  95%   { background-size: 350px auto; }
}

.donate--heartbeat {
     animation-name: heartbeat;
     animation-duration: 0.5s;
     animation-iteration-count: infinite;
}

.donate__panel {
    color: #fff;
    text-align: center;
    min-height: 12rem;
    max-width: 30rem !important;
}
.donate__title {
    padding: 0;
    margin: 1rem;
}
.donate__text {
    margin: 1rem;
}

.donate-modal {
    position: fixed;
    top: 0; bottom: 0; left: 0; right: 0;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.donate-modal__modal {
    box-shadow: 0rem 0.25rem 0.25rem rgba(0,0,0,0.5);
}

.donate-modal__iframe {
    height: 400px;
    width: 350px;
    border-style: none;
    margin-bottom: -6px;
}

main {
    padding: 0;
}
main li {
    margin-left: 2rem;
}

@media (max-width: 1350px) {
    .grande-title__text {
        flex-direction: column;
    }
    .hero-section__subtitle {
        font-size: 2rem;
        max-width: unset;
        text-align: center;
    }
    .hero-section__learnmore {
        margin: 2rem auto;
        font-size: 1rem;
        padding: 0.5rem 2rem;
    }
    .hero-section__main-title {
        font-size: 8rem;
    }
    .grande-title {
        border-bottom: solid 1px #fff;
    }
    .hero-section__subheader {
        margin-left: unset;
    }
}
@media (max-width: 720px) {
    .hero-section__main-title {
        font-size: 6rem;
    }
    .hero-section__subtitle {
        font-size: 1.5rem;
    }
}
@media (max-width: 420px) {
    .hero-section__main-title {
        font-size: 4rem;
        mix-blend-mode: unset;
    }
}
@media (max-width: 850px) {
    .hero-features__item--text,
    .hero-features__row:nth-of-type(even) .hero-features__item--text {
        align-items: center;
        justify-content: center;
    }

    .hero-features__image {
        object-fit: contain;
        object-position: center !important;
    }

    .hero-features__image--scale-down {
        object-fit: scale-down;
    }

    .hero-features__item {
        /*
        max-height: 50%;
        */
     }
    .hero-features__column,
    .hero-features__row:nth-of-type(odd) .hero-features__column {
        flex-direction: column;
    }
}