html,
body {
    min-height: 100dvh;
}

body {
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    text-decoration: none;
    color: var(--pico-muted-color);
    font-size: 0.9rem;
}

.back-link:hover {
    color: var(--pico-primary);
}

.protocol-shell {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
}

.protocol-meta {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
}

.protocol-title {
    margin: 0;
    font-size: 1.5rem;
    line-height: 1.2;
}

.protocol-counter {
    margin: 0;
    font-variant-numeric: tabular-nums;
    font-size: 0.9rem;
    color: var(--pico-muted-color);
    white-space: nowrap;
}

.protocol-counter > span:first-child {
    color: var(--pico-color);
    font-weight: 600;
}

.protocol-counter-sep {
    margin: 0 0.25rem;
    opacity: 0.5;
}

.protocol-progress {
    height: 4px;
    background: var(--pico-card-border-color);
    border-radius: 999px;
    overflow: hidden;
}

.protocol-progress-fill {
    height: 100%;
    background: var(--pico-primary);
    border-radius: inherit;
    transition: width 0.25s ease;
}

.steps-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.step {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 0;
    padding: 1.75rem;
    background: var(--pico-card-background-color);
    border: 1px solid var(--pico-card-border-color);
    border-radius: var(--pico-border-radius);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    animation: step-in 0.22s ease both;
}

@keyframes step-in {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-badge {
    align-self: flex-start;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--pico-primary);
    background: color-mix(in srgb, var(--pico-primary) 12%, transparent);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
}

.step-final {
    align-items: center;
    text-align: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.step-final::before {
    content: "";
    position: absolute;
    top: 40%;
    left: 50%;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        color-mix(in srgb, var(--pico-ins-color, #16a34a) 28%, transparent),
        transparent 65%
    );
    transform: translate(-50%, -50%) scale(0.35);
    opacity: 0;
    pointer-events: none;
    animation: final-glow 1.6s 0.15s ease-out forwards;
    z-index: 0;
}

@keyframes final-glow {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.35);
    }
    35% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1.6);
    }
}

.step-final .step-content,
.step-final .step-badge {
    position: relative;
    z-index: 1;
}

.checkmark {
    display: block;
    width: 76px;
    height: 76px;
    margin: 0 auto 0.5rem;
}

.checkmark-circle,
.checkmark-check {
    fill: none;
    stroke: var(--pico-ins-color, #16a34a);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.checkmark-circle {
    stroke-dasharray: 160;
    stroke-dashoffset: 160;
    animation: draw-circle 0.55s 0.25s ease-out forwards;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.checkmark-check {
    stroke-dasharray: 40;
    stroke-dashoffset: 40;
    animation: draw-check 0.35s 0.75s ease-out forwards;
}

@keyframes draw-circle {
    to {
        stroke-dashoffset: 0;
    }
}

@keyframes draw-check {
    to {
        stroke-dashoffset: 0;
    }
}

.step-final .step-badge {
    align-self: center;
    color: var(--pico-ins-color, #16a34a);
    background: color-mix(in srgb, var(--pico-ins-color, #16a34a) 14%, transparent);
}

.step-final .step-content {
    flex: 0 0 auto;
    max-width: 32ch;
}

.step-final h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.step-final p {
    color: var(--pico-muted-color);
}

.step-content {
    flex: 1;
}

.step-content > :first-child {
    margin-top: 0;
}

.step-content > :last-child {
    margin-bottom: 0;
}

.step-content h2 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    line-height: 1.25;
}

.step-content p,
.step-content ul,
.step-content ol {
    font-size: 1.05rem;
    line-height: 1.6;
}

.step-content ul,
.step-content ol {
    padding-left: 1.25rem;
}

.step-content li + li {
    margin-top: 0.35rem;
}

.protocol-nav {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
}

.protocol-nav button {
    margin: 0;
    min-width: 7rem;
}

.protocol-nav button:last-child {
    margin-left: auto;
}

@media (max-width: 480px) {
    .protocol-title {
        font-size: 1.25rem;
    }

    .step {
        padding: 1.25rem;
    }

    .protocol-nav button {
        flex: 1;
        min-width: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .step,
    .step-final::before,
    .protocol-progress-fill,
    .checkmark-circle,
    .checkmark-check {
        animation: none;
        transition: none;
    }
    .checkmark-circle,
    .checkmark-check {
        stroke-dashoffset: 0;
    }
}

.protocols-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: 1rem;
}

.protocol-card {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
    border-radius: var(--pico-border-radius);
}

.protocol-card article {
    position: relative;
    height: 100%;
    margin: 0;
    padding: 1.5rem 1.5rem 1.25rem;
    border: 1px solid var(--pico-card-border-color);
    border-radius: var(--pico-border-radius);
    background: var(--pico-card-background-color);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    transition:
        transform 0.18s ease,
        border-color 0.18s ease,
        box-shadow 0.18s ease;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow: hidden;
}

.protocol-card article::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: var(--pico-primary);
    opacity: 0;
    transition: opacity 0.18s ease;
}

.protocol-card article h3 {
    margin: 0;
    font-size: 1.125rem;
    line-height: 1.3;
    color: var(--pico-color);
}

.protocol-card-desc {
    color: var(--pico-muted-color);
    font-size: 0.92rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.protocol-card-desc > * {
    margin: 0;
}

.protocol-card-desc > * + * {
    margin-top: 0.35rem;
}

.protocol-card-arrow {
    margin-top: auto;
    align-self: flex-end;
    font-size: 1.1rem;
    color: var(--pico-muted-color);
    transform: translateX(0);
    transition:
        transform 0.18s ease,
        color 0.18s ease;
}

.protocol-card:hover article,
.protocol-card:focus-visible article {
    transform: translateY(-2px);
    border-color: var(--pico-primary-border, var(--pico-primary));
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

.protocol-card:hover article::before,
.protocol-card:focus-visible article::before {
    opacity: 1;
}

.protocol-card:hover .protocol-card-arrow,
.protocol-card:focus-visible .protocol-card-arrow {
    transform: translateX(3px);
    color: var(--pico-primary);
}

.protocol-card:focus-visible {
    outline: 2px solid var(--pico-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .protocol-card article,
    .protocol-card article::before,
    .protocol-card-arrow {
        transition: none;
    }
}